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LT1211/LT1212 14MHz, 7V/s, Single Supply Dual and Quad Precision Op Amps
FEATURES
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DESCRIPTIO
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s
s s s s s s s
APPLICATI
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Note: For applications requiring higher slew rate, see the LT1213/LT1214 and LT1215/LT1216 data sheets.
2.5V Full-Scale 12-Bit Systems 10V Full-Scale 16-Bit Systems Active Filters Photo Diode Amplifiers DAC Current-to-Voltage Amplifiers Battery-Powered Systems
TYPICAL APPLICATI
RG RF
Input Bias Current Cancellation
100
V+
90 80
INPUT CURRENT (nA)
VOUT SIGNAL AMP
-
1/2 LT1211 VIN
70 60 50 40 30 20
+
1M
+
22pF 1/2 LT1211 CANCELLATION AMP
10 0 0.01
-
1211/12 TA01
1M
UO
Slew Rate 7V/s Typ Gain-Bandwidth Product 14MHz Typ Fast Settling to 0.01% 2V Step to 200V 900ns Typ 10V Step to 1mV 2.2s Typ Excellent DC Precision in All Packages Input Offset Voltage 275V Max Input Offset Voltage Drift 6V/C Max Input Offset Current 30nA Max Input Bias Current 125nA Max Open-Loop Gain 1200V/mV Min Single Supply Operation Input Voltage Range Includes Ground Output Swings to Ground While Sinking Current Low Input Noise Voltage 12nV/Hz Typ Low Input Noise Current 0.2pA/Hz Typ Specified on 3.3V, 5V and 15V Large Output Drive Current 20mA Min Low Supply Current per Amplifier 1.8mA Max Dual in 8-Pin DIP and SO8 Quad in 14-Pin DIP and NARROW SO16
The LT1211 is a dual, single supply precision op amp with a 14MHz gain-bandwidth product and a 7V/s slew rate. The LT1212 is a quad version of the same amplifier. The DC precision of the LT1211/LT1212 eliminates trims in most systems while providing high frequency performance not usually found in single supply amplifiers. The LT1211/LT1212 will operate on any supply greater than 2.5V and less than 36V total. These amplifiers are specified on single 3.3V, single 5V and 15V supplies, and only require 1.3mA of quiescent supply current per amplifier. The inputs can be driven beyond the supplies without damage or phase reversal of the output. The minimum output drive is 20mA, ideal for driving low impedance loads.
Input Current vs Input Voltage
VS = 5V, VOUT IN LINEAR REGION WITHOUT CANCELLATION RIN = 300M
U
S
VOS 0.45LSB VOS 1.8LSB
WITH CANCELLATION RIN = 2.4G 0.1 1 INPUT VOLTAGE (V) 10
1211/12 TA02
UO
1
LT1211/LT1212 ABSOLUTE AXI U RATI GS
Storage Temperature Range ................ - 65C to 150C Junction Temperature (Note 2) Plastic Package (N8, S8, N, S) ........................ 150C Ceramic Package (J8) ...................................... 175C Lead Temperature (Soldering, 10 sec)................. 300C Total Supply Voltage (V + to V -) ............................. 36V Input Current ..................................................... 15mA Output Short-Circuit Duration (Note 1) ........ Continuous Operating Temperature Range LT1211C/LT1212C ............................ - 40C to 85C LT1211M ......................................... - 55C to 125C
PACKAGE/ORDER I FOR ATIO
TOP VIEW OUT A 1 -IN A 2 +IN A 3 V- 4
J8 PACKAGE 8-LEAD CERAMIC DIP B A
8
V+
ORDER PART NUMBER LT1211CN8 LT1211ACN8 LT1211MJ8 LT1211AMJ8
7 OUT B 6 -IN B 5 +IN B
N8 PACKAGE 8-LEAD PLASTIC DIP
TJMAX = 175C, JA = 100C/W (J) TJMAX = 150C, JA = 100C/W (N)
TOP VIEW
ORDER PART NUMBER
14 OUT D 13 -IN D 12 +IN D 11 V -
OUT A 1 -IN A 2 +IN A 3 V+ 4 +IN B 5 -IN B 6 OUT B 7
B C A D
LT1212CN
10 +IN C 9 8 -IN C OUT C
N PACKAGE 14-LEAD PLASTIC DIP
TJMAX = 150C, JA = 70C/W
AVAILABLE OPTIO S
NUMBER OF OP AMPS Two (Dual) TA RANGE - 40C to 85C MAX VOS (25C) 150V 275V 275V 150V 275V 275V MAX TC VOS (VOS /T) 1.5V/C 3V/C 6V/C 1.5V/C 3V/C 6V/C CERAMIC (J) PACKAGE PLASTIC DIP (N) LT1211ACN8 LT1211CN8 SURFACE MOUNT (S)
Two (Dual) Four (Quad)
- 55C to 125C - 40C to 85C
2
U
U
W
WW
U
U
W
TOP VIEW OUT A 1 -IN A 2 +IN A 3 V- 4
A B
8 V+ 7 OUT B 6 -IN B 5 +IN B
ORDER PART NUMBER LT1211CS8 S8 PART MARKING 1211 ORDER PART NUMBER LT1212CS
S8 PACKAGE 8-LEAD PLASTIC SOIC
TJMAX = 150C, JA = 150C/W
TOP VIEW OUT A 1 -IN A 2 +IN A 3 V+ 4
B C A D
16 OUT D 15 -IN D 14 +IN D 13 V - 12 +IN C 11 -IN C 10 OUT C 9 NC
+IN B 5 -IN B 6 OUT B 7 NC 8
S PACKAGE 16-LEAD PLASTIC SOIC
TJMAX = 150C, JA = 100C/W
LT1211CS8 LT1211AMJ8 LT1211MJ8 LT1212CN LT1212CS
LT1211/LT1212 5V ELECTRICAL CHARACTERISTICS
VS = 5V, VCM = 0.5V, VOUT = 0.5V, TA = 25C, unless otherwise noted.
LT1211AC LT1211AM MIN TYP MAX 75 150 0.5 5 50 250 12.5 12.0 0.9 0.2 40 500 10 3.8 - 0.3 105 115 560 4.40 4.30 4.00 0.003 0.047 0.362 50 4 13 1.3 2.2 300 45 25 36 900 75 0.001 20 100 LT1211C/LT1211M LT1212C MIN TYP MAX 100 275 0.6 5 60 250 12.5 12.0 0.9 0.2 40 500 10 3.8 - 0.3 102 110 560 4.40 4.30 4.00 0.003 0.047 0.362 50 4 13 1.3 2.2 300 45 25 36 900 75 0.001 30 125
SYMBOL VOS VOS Time IOS IB en in
PARAMETER Input Offset Voltage Long-Term Input Offset Voltage Stability Input Offset Current Input Bias Current Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance (Note 3) Input Capacitance Input Voltage Range
CONDITIONS
UNITS V V/Mo nA nA nVP-P nV/Hz nV/Hz pA/Hz pA/Hz M M pF V V dB dB V/mV V V V V V V mA V/s MHz mA V kHz ns % ns ns %
0.1Hz to 10Hz fO = 10Hz fO = 1000Hz fO = 10Hz fO = 1000Hz Differential Mode Common Mode f = 1MHz
10
10
CMRR PSRR AVOL
Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing (Note 4)
IO SR GBW IS
tr, tf OS tPD tS THD
Maximum Output Current Slew Rate Gain-Bandwidth Product Supply Current per Amplifier Minimum Supply Voltage Full Power Bandwidth Rise Time, Fall Time Overshoot Propagation Delay Settling Time Open-Loop Output Resistance Total Harmonic Distortion
VCM = 0V to 3.5V VS = 2.5V to 12.5V VO = 0.05V to 3.7V, RL = 500 Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 15mA Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 15mA (Note 9) AV = - 2 f = 100kHz Single Supply AV = 1, VO = 2.5VP-P AV = 1, 10% to 90%, VO = 100mV AV = 1, VO = 100mV AV = 1, VO = 100mV 0.01%, AV = 1, VO = 2V IO = 0mA, f = 5MHz AV = 1, VO = 1VRMS, 20Hz to 20kHz
3.5 0 90 90 250 4.30 4.20 3.85
3.5 0 86 87 250 4.30 4.20 3.85 0.006 0.065 0.500 20
0.006 0.065 0.500
20
0.9
1.8 2.5
0.9
1.8 2.5
3
LT1211/LT1212 5V ELECTRICAL CHARACTERISTICS
VS = 5V, VCM = 0.5V, VOUT = 0.5V, 0C TA 70C, unless otherwise noted.
SYMBOL VOS VOS T IOS IB PARAMETER Input Offset Voltage Input Offset Voltage Drift (Note 3) Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing (Note 4) CONDITIONS 8-Pin DIP Package 14-Pin DIP, SOIC Package MIN LT1211AC TYP MAX 100 175 0.7 1.5 5 60 3.5 - 0.1 105 114 430 4.33 4.23 4.03 0.004 0.052 0.290 1.4 25 110 LT1211C/LT1212C MIN TYP MAX 150 375 1 3 2 6 10 35 70 135 3.4 3.5 0.1 - 0.1 85 102 86 110 150 430 4.20 4.33 4.10 4.23 3.90 4.03 0.004 0.007 0.052 0.070 0.290 0.400 0.8 1.4 2.1 UNITS V V/C V/C nA nA V V dB dB V/mV V V V V V V mA
CMRR PSRR AVOL
VCM = 0.1V to 3.4V VS = 2.5V to 12.5V VO = 0.05V to 3.7V, RL = 500 Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 10mA Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 10mA
3.4 0.1 89 89 150 4.20 4.10 3.90
IS
Supply Current per Amplifier
0.8
0.007 0.070 0.400 2.1
VS = 5V, VCM = 0.5V, VOUT = 0.5V, - 40C TA 85C, unless otherwise noted. (Note 5)
SYMBOL VOS VOS T IOS IB PARAMETER Input Offset Voltage Input Offset Voltage Drift (Note 3) Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing (Note 4) CONDITIONS 8-Pin DIP Package 14-Pin DIP, SOIC Package MIN LT1211AC TYP MAX 120 200 0.7 1.5 10 70 3.2 0 104 113 390 4.25 4.16 3.96 0.005 0.053 0.300 1.5 30 120 LT1211C/LT1212C MIN TYP MAX 175 500 1 3 2 6 20 50 80 145 3.1 3.2 0.2 0 84 101 85 109 100 390 4.15 4.25 4.00 4.16 3.80 3.96 0.005 0.008 0.053 0.075 0.300 0.420 0.7 1.5 2.2 UNITS V V/C V/C nA nA V V dB dB V/mV V V V V V V mA
CMRR PSRR AVOL
VCM = 0.2V to 3.1V VS = 2.5V to 12.5V VO = 0.05V to 3.7V, RL = 500 Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 10mA Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 10mA
3.1 0.2 88 88 100 4.15 4.00 3.80
IS
Supply Current per Amplifier
0.7
0.008 0.075 0.420 2.2
4
LT1211/LT1212 5V ELECTRICAL CHARACTERISTICS
VS = 5V, VCM = 0.5V, VOUT = 0.5V, - 55C TA 125C, unless otherwise noted.
SYMBOL VOS VOS T IOS IB PARAMETER Input Offset Voltage Input Offset Voltage Drift (Note 3) Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing (Note 4) CONDITIONS MIN LT1211AM TYP MAX 140 250 0.7 1.5 15 75 3.2 0.2 104 113 250 4.20 4.10 3.90 0.007 0.060 0.350 1.7 40 130 3.1 0.4 81 84 100 4.10 3.95 3.70 0.010 0.085 0.500 2.5 MIN LT1211M TYP MAX 200 500 1 3 25 85 3.2 0.2 101 109 250 4.20 4.10 3.90 0.007 0.060 0.350 1.7 75 160 UNITS V V/C nA nA V V dB dB V/mV V V V mV mV mV mA
CMRR PSRR AVOL
VCM = 0.4V to 3.1V VS = 2.5V to 12.5V VO = 0.05V to 3.7V, RL = 500 Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 10mA Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 10mA
3.1 0.4 87 87 100 4.10 3.95 3.70
IS
Supply Current per Amplifier
0.5
0.5
0.010 0.085 0.500 2.5
+15V ELECTRICAL CHARACTERISTICS -
VS = 15V, VCM = 0V, VOUT = 0V, TA = 25C, unless otherwise noted.
SYMBOL VOS IOS IB PARAMETER Input Offset Voltage Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing Maximum Output Current Slew Rate Gain-Bandwidth Product Supply Current per Amplifier Channel Separation Minimum Supply Voltage Full Power Bandwidth Settling Time CONDITIONS LT1211AC LT1211AM MIN TYP 125 5 45 13.5 13.8 -15.0 - 15.3 90 105 90 113 1200 5000 13.8 14.0 -14.4 -14.6 20 50 5 7 8 14 0.9 1.8 128 140 1.2 60 2.2 MAX 400 20 95 LT1211C/LT1211M LT1212C MIN TYP MAX 150 550 5 30 50 120 13.5 13.8 -15.0 - 15.3 86 102 87 110 1200 5000 13.8 14.0 -14.4 -14.6 20 50 5 7 8 14 0.9 1.8 2.5 128 140 1.2 2.0 60 2.2 UNITS V nA nA V V dB dB V/mV V V mA V/s MHz mA dB V kHz s
CMRR PSRR AVOL
IO SR GBW IS
VCM = -15V to 13.5V VS = 2V to 18V VO = 0V to 10V, RL = 2k Output High, ISOURCE = 15mA Output Low, ISINK = 15mA (Note 9) AV = - 2 (Note 6) f = 100kHz VO = 10V, RL = 2k Equal Split Supplies AV = 1, VO = 20VP-P 0.01%, AV = 1, VO = 10V
2.5 2.0
5
LT1211/LT1212 +15V ELECTRICAL CHARACTERISTICS -
SYMBOL VOS VOS T IOS IB PARAMETER Input Offset Voltage Input Offset Voltage Drift (Note 3) Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing Supply Current per Amplifier CONDITIONS 8-Pin DIP Package 14-Pin DIP, SOIC Package
VS = 15V, VCM = 0V, VOUT = 0V, 0C TA 70C, unless otherwise noted.
MIN LT1211AC TYP MAX 150 425 0.7 1.5 10 55 13.5 -15.1 104 112 3500 14.0 - 14.7 2.1 20 100 LT1211C/LT1212C MIN TYP MAX 200 650 1 3 2 6 10 35 60 125 13.4 13.5 -14.9 -15.1 85 101 86 108 1000 3500 13.8 14.0 - 14.5 - 14.7 0.8 2.1 2.9 UNITS V V/C V/C nA nA V V dB dB V/mV V V mA
CMRR PSRR AVOL
VCM = -14.9V to 13.4V VS = 2V to 18V VO = 0V to 10V, RL = 2k Output High, ISOURCE = 10mA Output Low, ISINK = 10mA
IS
13.4 -14.9 89 89 1000 13.8 - 14.5 0.8
2.9
VS = 15V, VCM = 0V, VOUT = 0V, - 40C TA 85C, unless otherwise noted. (Note 5)
SYMBOL VOS VOS T IOS IB PARAMETER Input Offset Voltage Input Offset Voltage Drift (Note 3) Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing Supply Current per Amplifier CONDITIONS 8-Pin DIP Package 14-Pin DIP, SOIC Package MIN LT1211AC TYP MAX 175 450 0.7 1.5 10 55 13.2 -15.0 103 111 3000 13.9 - 14.7 2.2 25 100 LT1211C/LT1212C MIN TYP MAX 250 700 1 3 2 6 10 40 60 130 13.1 13.2 -14.8 -15.0 84 100 85 107 1000 3000 13.7 13.9 - 14.5 - 14.7 0.7 2.2 3.0 UNITS V V/C V/C nA nA V V dB dB V/mV V V mA
CMRR PSRR AVOL
VCM = - 14.8V to 13.1V VS = 2V to 18V VO = 0V to 10V, RL = 2k Output High, ISOURCE = 10mA Output Low, ISINK = 10mA
IS
13.1 -14.8 88 88 1000 13.7 - 14.5 0.7
3.0
VS = 15V, VCM = 0V, VOUT = 0V, - 55C TA 125C, unless otherwise noted.
SYMBOL VOS VOS T IOS IB PARAMETER Input Offset Voltage Input Offset Voltage Drift (Note 3) Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing Supply Current per Amplifier CONDITIONS MIN LT1211AM TYP MAX 200 500 0.7 1.5 10 55 13.2 -14.8 103 111 1500 13.8 -14.5 2.3 40 110 13.1 -14.6 81 84 800 13.6 -14.3 0.5 MIN LT1211M TYP MAX 300 800 1 3 10 60 13.2 -14.8 100 107 1500 13.8 -14.5 2.3 60 140 UNITS V V/C nA nA V V dB dB V/mV V V mA
CMRR PSRR AVOL
VCM = - 14.6V to 13.1V VS = 2V to 15V VO = 0V to 10V, RL = 2k Output High, ISOURCE = 10mA Output Low, ISINK = 10mA
IS
13.1 -14.6 87 87 800 13.6 -14.3 0.5
3.4
3.4
6
LT1211/LT1212 3.3V ELECTRICAL CHARACTERISTICS
VS = 3.3V, VCM = 0.5V, VOUT = 0.5V, TA = 25C, unless otherwise noted. (Note 7)
LT1211AC LT1211AM TYP MAX 75 150 2.1 - 0.3 2.70 2.60 2.30 0.003 0.006 0.047 0.065 0.362 0.500 50 LT1211C/LT1211M LT1212C MIN TYP MAX 100 275 1.8 2.1 0 - 0.3 2.60 2.70 2.50 2.60 2.15 2.30 0.003 0.006 0.047 0.065 0.362 0.500 20 50 SYMBOL PARAMETER VOS Input Offset Voltage Input Voltage Range (Note 8) CONDITIONS MIN 1.8 0 2.60 2.50 2.15 UNITS V V V V V V V V V mA
IO
Maximum Output Voltage Swing Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 15mA Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 15mA Maximum Output Current
20
VS = 3.3V, VCM = 0.5V, VOUT = 0.5V, 0C TA 70C, unless otherwise noted. (Note 7)
SYMBOL PARAMETER VOS Input Offset Voltage Input Voltage Range (Note 8) CONDITIONS MIN 1.7 0.1 2.50 2.40 2.20 LT1211AC TYP 100 1.4 - 0.1 2.63 2.53 2.33 0.004 0.052 0.290 MAX 175 LT1211C/LT1212C MIN TYP MAX 150 375 1.7 1.8 0.1 - 0.1 2.50 2.63 2.40 2.53 2.20 2.33 0.004 0.007 0.052 0.070 0.290 0.400 UNITS V V V V V V V V V
Maximum Output Voltage Swing Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 10mA Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 10mA
0.007 0.070 0.400
VS = 3.3V, VCM = 0.5V, VOUT = 0.5V, - 40C TA 85C, unless otherwise noted. (Note 5, 7)
SYMBOL PARAMETER VOS Input Offset Voltage Input Voltage Range (Note 8) CONDITIONS MIN 1.4 0.2 2.45 2.30 2.10 LT1211AC TYP 120 1.5 0 2.55 2.46 2.26 0.005 0.053 0.300 MAX 200 LT1211C/LT1212C MIN TYP MAX 175 500 1.4 1.5 0.2 0 2.45 2.55 2.30 2.46 2.10 2.26 0.005 0.008 0.053 0.075 0.300 0.420 UNITS V V V V V V V V V
Maximum Output Voltage Swing Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 10mA Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 10mA
0.008 0.075 0.420
VS = 3.3V, VCM = 0.5V, VOUT = 0.5V, - 55C TA 125C, unless otherwise noted. (Note 7)
SYMBOL PARAMETER VOS Input Offset Voltage Input Voltage Range (Note 8) CONDITIONS MIN 1.4 0.4 2.40 2.25 2.00 LT1211AM TYP MAX 130 250 1.5 0.2 2.50 2.40 2.20 0.007 0.010 0.060 0.085 0.350 0.500 MIN 1.4 0.4 2.40 2.25 2.00 LT1211M TYP 200 1.5 0.2 2.50 2.40 2.20 0.007 0.060 0.350 MAX 500 UNITS V V V V V V V V V
Maximum Output Voltage Swing Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 10mA Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 10mA
0.010 0.085 0.500
7
LT1211/LT1212
ELECTRICAL CHARACTERISTICS
Note 1: A heat sink may be required to keep the junction temperature below absolute maximum when the output is shorted indefinitely. Note 2: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formulas: LT1211MJ8, LT1211AMJ8: TJ = TA + (PD x 100C/W) LT1211CN8, LT1211ACN8: TJ = TA + (PD x 100C/W) LT1211CS8: TJ = TA + (PD x 150C/W) LT1212CN: TJ = TA + (PD x 70C/W) LT1212CS: TJ = TA + (PD x 100C/W) Note 3: This parameter is not 100% tested. Note 4: Guaranteed by correlation to 3.3V and 15V tests. Note 5: The LT1211/LT1212 are not tested and are not quality-assurance sampled at - 40C and at 85C. These specifications are guaranteed by design, correlation and/or inference from - 55C, 0C, 25C, 70C and/or 125C tests. Note 6: Slew rate is measured between 8.5V on an output swing of 10V on 15V supplies. Note 7: Most LT1211/LT1212 electrical characteristics change very little with supply voltage. See the 5V tables for characteristics not listed in the 3.3V table. Note 8: Guaranteed by correlation to 5V and 15V tests. Note 9: Guaranteed by correlation to 3.3V tests.
TYPICAL PERFOR A CE CHARACTERISTICS
Distribution of Input Offset Voltage
70 VS = 5V 60
PERCENT OF UNITS (%)
LT1211 J8 PACKAGE LT1211 N8 PACKAGE
50 40 30 20 10 0 -350 -250 -150 -50 50 150 250 INPUT OFFSET VOLTAGE (V)
PERCENT OF UNITS (%)
PERCENT OF UNITS (%)
Distribution of Input Offset Voltage
70 VS = 5V 60
PERCENT OF UNITS (%)
LT1211 S8 PACKAGE LT1212 N PACKAGE LT1212 S PACKAGE
50 40 30 20 10 0 -350 -250 -150 -50 50 150 250 INPUT OFFSET VOLTAGE (V)
PERCENT OF UNITS (%)
PERCENT OF UNITS (%)
8
UW
1211/12 G01 1211/12 G04
Distribution of Offset Voltage Drift with Temperature
50 VS = 5V 40 LT1211 J8 PACKAGE LT1211 N8 PACKAGE
Distribution of Input Offset Voltage
70 VS = 15V 60 50 40 30 20 10 0 -700 -500 -300 -100 100 300 500 INPUT OFFSET VOLTAGE (V) LT1211 J8 PACKAGE LT1211 N8 PACKAGE
30
20
10
350
0 -1 -2 1 -3 3 0 2 OFFSET VOLTAGE DRIFT WITH TEMPERATURE (V/C)
1211/12 G02
700
1211/12 G03
Distribution of Offset Voltage Drift with Temperature
50 VS = 5V 40 LT1211 S8 PACKAGE LT1212 N PACKAGE LT1212 S PACKAGE
Distribution of Input Offset Voltage
70 VS = 15V 60 50 40 30 20 10 0 -700 -500 -300 -100 100 300 500 INPUT OFFSET VOLTAGE (V) LT1211 S8 PACKAGE LT1212 N PACKAGE LT1212 S PACKAGE
30
20
10
350
0 -2 -4 2 -6 6 0 4 OFFSET VOLTAGE DRIFT WITH TEMPERATURE (V/C)
1211/12 G05
700
1211/12 G06
LT1211/LT1212
TYPICAL PERFOR A CE CHARACTERISTICS
Voltage Gain vs Frequency
140 120
VOLTAGE GAIN (dB)
60
GAIN-BANDWIDTH PRODUCT (MHz)
CL = 20pF RL = 2k
40
VOLTAGE GAIN (dB)
100 80 60 40 20 0 VS = 5V -20 1 10 100 10k 100k 1M 10M 100M FREQUENCY (Hz)
1211/12 G07
VS = 15V
1k
Slew Rate vs Temperature
10 TA = 25C AV = -2 RL = 10k 10
8
VS = 15V
SLEW RATE (V/s)
SLEW RATE (V/s)
6
TA = 25C TA = -55C
OVERSHOOT (%)
6 VS = 5V 4
2 -50 -25
25 0 50 75 TEMPERATURE (C)
Undistorted Output Swing vs Frequency, VS = 5V
5 AV = -1 4 VS = 5V 25
OUTPUT SWING (VP-P)
TOTAL HARMONIC DISTORTION AND NOISE (%)
OUTPUT SWING (VP-P)
AV = 1 3
2
1
0 100
1k
10k 100k FREQUENCY (Hz)
UW
100
1211/12 G10
Voltage Gain, Phase vs Frequency
100 PHASE CL = 20pF RL = 2k 80 60
Gain-Bandwidth Product, Phase Margin vs Supply Voltage
16 15 14 13 12 11 10 TA = 25C, 125C TA = -55C TA = 125C 60 50 40 30 20 10 1 3 5 7 10 20 TOTAL SUPPLY VOLTAGE (V) 0 30 40 TA = 25C TA = -55C PHASE MARGIN (DEG)
PHASE SHIFT (DEG)
VS = 5V 20 GAIN
VS = 15V
40 20 0
0 VS = 15V VS = 5V -20 100k 1M 10M FREQUENCY (Hz)
-20 -40
-60 100M
1211/12 G08
1211/12 G09
Slew Rate vs Supply Voltage
80
Capacitive Load Handling
70 60 50 40 30 20 AV = 1 AV = 5 10 AV = 10 0 VS = 5V
AV = -2 RL = 10k 8
TA = 125C
4
2
125
0 0 4 8 12 16 20 24 28 32 TOTAL SUPPLY VOLTAGE (V) 36
10
1000 100 CAPACITIVE LOAD (pF)
10000
1211/12 G12
1211/12 G11
Undistorted Output Swing vs Frequency, VS = 15V
30 VS = 15V
Total Harmonic Distortion and Noise vs Frequency
0.1 VS = 5V VO = 3VP-P RL = 1k 0.01 AV = 10
20 15 10 5 0 100
0.001
AV = 1
1M
1211/12 G13
1k
10k 100k FREQUENCY (Hz)
1M
1211/12 G14
0.0001 10
100
1k 10k FREQUENCY (Hz)
100k
1211/12 G15
9
LT1211/LT1212
TYPICAL PERFOR A CE CHARACTERISTICS
Open-Loop Voltage Gain vs Supply Voltage
6k 5k 4k 3k 2k 1k 0 0 4 8 12 16 20 24 28 32 TOTAL SUPPLY VOLTAGE (V) 36 TA = -55C TA = 25C TA = 125C RL = 2k
OPEN-LOOP VOLTAGE GAIN (V/mV)
RL = 2k INPUT, 5V/DIV
SATURATION VOLTAGE, V + - VOUT (V)
Voltage Gain vs Load Resistance
10k TA = 25C OPEN-LOOP VOLTAGE GAIN (V/mV)
RL = 2k INPUT, 5V/DIV
VS = 15V VS = 5V
SATURATION VOLTAGE, VOUT - V - (mV)
1k
100
10 10 100 1k LOAD RESISTANCE () 10k
1211/12 G19
Channel Separation vs Frequency
140 130 120 110 100 90 80 70 60 50 40 30 10k 100k 1M FREQUENCY (Hz) 10M
1211/12 G22
OUTPUT SHORT-CIRCUIT CURRENT (mA)
VS = 15V TA = 25C
CHANNEL SEPARATION (dB)
50 VS = 15V SOURCING OR SINKING
OUTPUT IMPEDANCE ()
10
UW
1211/12 G16
Open-Loop Gain, VS = 5V
1.4
Positive Output Saturation Voltage vs Temperature
VS = 5V 1.2 ISOURCE = 20mA 1.0 ISOURCE = 10mA 0.8 ISOURCE = 1mA 0.6 ISOURCE = 10A 0.4 0.2 -50 -25
RL = 500
0
1
2 3 OUTPUT (V)
4
1211/12 G17
50 25 75 0 TEMPERATURE (C)
100
125
1211/12 G18
Open-Loop Gain, VS = 15V
1000
Negative Output Saturation Voltage vs Temperature
ISINK = 20mA ISINK = 10mA 100 ISINK = 1mA 10
RL = 500
ISINK = 10A
-10
0 OUTPUT (V)
10
1211/12 G20
VS = 5V 1 -50 -25 0 25 50 75 TEMPERATURE (C) 100 125
1211/12 G21
Output Short-Circuit Current vs Temperature
60
Output Impedance vs Frequency
1000 VS = 15V
VS = 5V SOURCING
100
10
AV = 100
40
1
AV = 10
30
0.1 AV = 1
20 -50 -25 50 100 25 75 0 CASE TEMPERATURE (C) 125
0.01 10k
100k 1M FREQUENCY (Hz)
10M
1211/12 G24
1211/12 G23
LT1211/LT1212
TYPICAL PERFOR A CE CHARACTERISTICS
5V Small-Signal Response
3V
20mV/DIV
100ns/DIV VS = 5V AV = 1
1211/12 G25
15V Small-Signal Response
20mV/DIV
VS = 15V AV = 1
100ns/DIV
1211/12 G28
5V Settling
500mV/DIV
OUTPUT STEP (V)
2V/DIV
200ns/DIV VS = 5V AV = 1
1211/12 G31
UW
5V Large-Signal Response
3V
5V Large-Signal Response
0V 500ns/DIV VS = 5V AV = 1
1211/12 G26
0V 500ns/DIV VS = 5V AV = -1 RF = RG = 1k CF = 20pF
1211/12 G27
15V Large-Signal Response
15V Large-Signal Response
10V
10V
0V
0V
-10V
-10V
VS = 15V AV = 1
2s/DIV
1211/12 G29
VS = 15V AV = -1 RF = RG = 1k
2s/DIV
1211/12 G30
15V Settling
10 8 6 4 2 0 -2 -4 -6 -8
1211/12 G32
Settling Time to 0.01% vs Output Step
VS = 15V INVERTING NONINVERTING
250V/DIV
1mV/DIV
INVERTING
VS = 15V AV = -1
500ns/DIV
NONINVERTING 0.5 2.0 1.5 1.0 SETTLING TIME (s) 2.5
1211/12 G33
-10
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LT1211/LT1212
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Supply Voltage
2
SUPPLY CURRENT PER AMPLIFIER (mA)
SUPPLY CURRENT PER AMPLIFIER (mA)
2.2
VS = 15V
CHANGE IN OFFSET VOLTAGE (V)
TA = 125C
TA = 25C
1
TA = -55C
0 0 1 2 3 4 SUPPLY VOLTAGE (V) 5
1211/12 G34
Input Bias Current vs Temperature
100 VS = 5V 90 80 70 60 50 -IB 40 30 -50 -25
-100 0
-40
TA = 25C TA = 125C TA = -55C
COMMON-MODE RANGE (V)
INPUT BIAS CURRENT (nA)
INPUT BIAS CURRENT (nA)
+IB IOS
50 25 75 0 TEMPERATURE (C)
Input Noise Current, Noise Voltage Density vs Frequency
20
INPUT NOISE VOLTAGE DENSITY (nV/Hz)
COMMON-MODE REJECTION RATIO (dB)
18 16 14 12 10 8 6 4 2 0 10
1.8 1.6 1.4 VOLTAGE NOISE 1.2 1.0 0.8 0.6 0.4 CURRENT NOISE 0.2 0 100k
1211/12 G40
POWER SUPPLY REJECTION RATIO (dB)
VS = 15V TA = 25C RS = 0
100
1k 10k FREQUENCY (Hz)
12
UW
100
1211/12 G37
Supply Current vs Temperature
2.6
Warm-Up Drift vs Time
2 VS = 5V RL = 2 TYPICAL AMPLIFIERS 1
1.8 VS = 5V 1.4
0
1.0
-1
0.6 -50 -25
25 0 50 75 TEMPERATURE (C)
100
125
-2 0 10 30 40 20 TIME AFTER POWER-UP (SEC) 50
1211/12 G36
1211/12 G35
Input Bias Current vs Common-Mode Voltage
V+
VS = 5V -20
Common-Mode Range vs Temperature
V + -1
V + -2 V - +1
-60
-80
V-
V - -1
-1 0 2 3 1 COMMON-MODE VOLTAGE (V) 4
1211/12 G38
125
-50 -25
50 25 75 0 TEMPERATURE (C)
100
125
1211/12 G39
Common-Mode Rejection Ratio vs Frequency
2.0
INPUT NOISE CURRENT DENSITY (pA/Hz)
Input Referred Power Supply Rejection Ratio vs Frequency
130 120 110 100 90 80 70 60 50 40 30 1k NEGATIVE SUPPLY POSITIVE SUPPLY VS = 15V AV = 100
110 100 90 80 70 60 50 40 30 20 10 10k 100k 1M FREQUENCY (Hz) 10M
1211/12 G41
VS = 5V
10k
100k 1M FREQUENCY (Hz)
10M
1211/12 G42
LT1211/LT1212
APPLICATI
Supply Voltage
S I FOR ATIO
The LT1211/LT1212 op amps are fully functional and all internal bias circuits are in regulation with 2.2V of supply. The amplifiers will continue to function with as little as 1.5V, although the input common-mode range and the phase margin are about gone. The minimum operating supply voltage is guaranteed by the PSRR tests which are done with the input common mode equal to 500mV and a minimum supply voltage of 2.5V. The LT1211/LT1212 are guaranteed over the full - 55C to 125C range with a minimum supply voltage of 2.5V. The positive supply pin of the LT1211/LT1212 should be bypassed with a small capacitor (about 0.01F) within an inch of the pin. When driving heavy loads and for good settling time, an additional 4.7F capacitor should be used. When using split supplies, the same is true for the negative supply pin. Power Dissipation The LT1211/LT1212 amplifiers combine high speed and large output current drive into very small packages. Because these amplifiers work over a very wide supply range, it is possible to exceed the maximum junction temperature under certain conditions. To insure that the LT1211/ LT1212 are used properly, calculate the worst case power dissipation, define the maximum ambient temperature, select the appropriate package and then calculate the maximum junction temperature. The worst case amplifier power dissipation is the total of the quiescent current times the total power supply voltage plus the power in the IC due to the load. The quiescent supply current of the LT1211/LT1212 has a positive temperature coefficient. The maximum supply current of each amplifier at 125C is given by the following formula: ISMAX = 2.5 + 0.036 x (VS - 5) in mA VS is the total supply voltage. The power in the IC due to the load is a function of the output voltage, the supply voltage and load resistance. The worst case occurs when the output voltage is at half supply, if it can go that far, or its maximum value if it cannot reach half supply.
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For example, calculate the worst case power dissipation while operating on 15V supplies and driving a 500 load. ISMAX = 2.5 + 0.036 x (30 - 5) = 3.4mA PDMAX = 2 x VS x ISMAX + (VS - VOMAX) x VOMAX/RL PDMAX = 2 x 15V x 3.4mA + (15V - 7.5V) x 7.5V/500 = 0.102 + 0.113 = 0.215W per Amp If this is the quad LT1212, the total power in the package is four times that, or 0.860W. Now calculate how much the die temperature will rise above the ambient. The total power dissipation times the thermal resistance of the package gives the amount of temperature rise. For this example, in the SO surface mount package, the thermal resistance is 100C/W junction-to-ambient in still air. Temperature Rise = PDMAX x JA = 0.860W x 100C/W = 86C The maximum junction temperature allowed in the plastic package is 150C. Therefore the maximum ambient allowed is the maximum junction temperature less the temperature rise. Maximum Ambient = 150C - 86C = 64C That means the SO quad can only be operated at or below 64C on 15V supplies with a 500 load. As a guideline to help in the selection of the LT1211/ LT1212, the following table describes the maximum supply voltage that can be used with each part based on the following assumptions: 1. The maximum ambient is 70C or 125C depending on the part rating. 2. The load is 500, includes the feedback resistors. 3. The output can be anywhere between the supplies.
PART LT1211MJ8 LT1211CN8 LT1211CS8 LT1212CN LT1212CS MAX SUPPLIES 19.5V or 16.4V 25.2V or 18.0V 20.3V or 17.1V 21.0V or 17.8V 17.3V or 14.4V MAX POWER AT MAX TA 500mW 800mW 533mW 1143mW 800mW
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LT1211/LT1212
APPLICATI
Inputs Typically, at room temperature, the inputs of the LT1211/ LT1212 can common mode 400mV below ground (V -) and to within 1.2V of the positive supply with the amplifier still functional. However the input bias current and offset voltage will shift as shown in the characteristic curves. For full precision performance, the common-mode range should be limited between ground (V -) and 1.5V below the positive supply. When either of the inputs is taken below ground (V -) by more than about 700mV, that input bias current will increase dramatically. The current is limited by internal 100 resistors between the input pins and diodes to each supply. The output will remain low (no phase reversal) for inputs 1.3V below ground (V -). If the output does not have to sink current, such as in a single supply system with a 1k load to ground, there is no phase reversal for inputs up to 8V below ground. There are no clamps across the inputs of the LT1211/ LT1212 and therefore each input can be forced to any voltage between the supplies. The input current will remain constant at about 60nA over most of this range. When an input gets closer than 1.5V to the positive supply, that input current will gradually decrease to zero until the input goes above the supply, then it will increase due to the previously mentioned diodes. If the inverting input is held more positive than the noninverting input by 200mV or more, while at the same time the noninverting input is within 300mV of ground (V -), then the supply current will increase by 1mA and the noninverting input current will increase to about 10A. This should be kept in mind in comparator applications where the inverting input stays above ground (V -) and the noninverting input is at or near ground (V -). Output The output of the LT1211/LT1212 will swing to within 0.60V of the positive supply with no load. The open-loop output resistance, when the output is driven hard into the
S I FOR ATIO
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positive rail, is about 100 as the output starts to source current; this resistance drops to about 25 as the current increases. Therefore when the output sources 1mA, the output will swing to within 0.7V of the positive supply. While sourcing 20mA, it is within 1.1V of the positive supply. The output of the LT1211/LT1212 will swing to within 3mV of the negative supply while sinking zero current. Thus, in a typical single supply application with the load going to ground, the output will go to within 3mV of ground. The open-loop output resistance when the output is driven hard into the negative rail is about 44 at low currents and reduces to about 24 at high currents. Therefore, when the output sinks 1mA, the output is about 42mV above the negative supply and while sinking 20mA, it is about 480mV above it. The output of the LT1211/LT1212 has reverse-biased diodes to each supply. If the output is forced beyond either supply, unlimited currents will flow. If the current is transient and limited to several hundred mA, no damage will occur. Feedback Components Because the input currents of the LT1211/LT1212 are less than 125nA, it is possible to use high value feedback resistors to set the gain. However, care must be taken to insure that the pole that is formed by the feedback resistors and the input capacitance does not degrade the stability of the amplifier. For example, if a single supply, noninverting gain of two is set with two 20k resistors, the LT1211/LT1212 will probably oscillate. This is because the amplifier goes open-loop at 3MHz (6dB of gain) and has 50 of phase margin. The feedback resistors and the 10pF input capacitance generate a pole at 1.6MHz that introduces 63 of phase shift at 3MHz! The solution is simple; use lower value resistors or add a feedback capacitor of 10pF or more.
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LT1211/LT1212
APPLICATI S I FOR ATIO
Comparator Applications Sometimes it is desirable to use an op amp as a comparator. When operating the LT1211/LT1212 on a single 3.3V or 5V supply, the output interfaces directly with most TTL and CMOS logic. The response time of the LT1211/LT1212 is a strong function of the amount of input overdrive as shown in the
LT1211 Comparator Response (+) 20mV, 10mV, 5mV, 2mV Overdrives LT1211 Comparator Response (-) 20mV, 10mV, 5mV, 2mV Overdrives
4 OUTPUT (V) OUTPUT (V) INPUT (mV) 5s/DIV
1211/12 AI01
2
0 INPUT (mV) 100 0
VS = 5V RL =
SI PLIFIED SCHE ATIC
V+ I1 I2 I3 I4 I5 I6
Q3 -IN Q1 Q7
Q4 +IN Q2 Q11 RF CF Q10 Q12
Q8 Q9 CI Q5 Q6
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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following photos. These amplifiers are unity-gain stable op amps and not fast comparators, therefore, the logic being driven may oscillate due to the long transition time. The output can be speeded up by adding 20mV or more of hysteresis (positive feedback), but the offset is then a function of the input direction.
4 2 0 100 0 5s/DIV VS = 5V RL =
1211/12 AI02
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CM
BIAS
Q13 Q14 Q15
OUT
Q16 I7 CO
I8
V-
1211/12 SS
15
LT1211/LT1212
TYPICAL APPLICATI
C1 1000pF R1 2.94k
VIN
-
1/4 LT1212
+
2.94k
20k 3.3V 13k
12-BIT ACCURATE SIGNAL RANGE FROM 6mV TO 1.8V ON 3.3V SINGLE SUPPLY. MAXIMUM OUTPUT OFFSET ERROR IS 676V. FOR EACH 2ND ORDER SECTION: 1 C1C2R1R2 1 R1 = WOQC1 Q R2 = WOC2 WO2 =
GAIN (dB)
1A Voltage-Controlled Current Source
V+ 1 1k 1k 1k VIN 500pF 100 Si9430DY P-CHANNEL IOUT V IOUT = IN 1 tr < 1s RL
1211/12 TA04
-
1/2 LT1211
+
1k
PACKAGE DESCRIPTIO
For package description please see other Linear Technology data sheets or databooks.
16
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
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Single Supply, 100kHz, 4th Order Butterworth Lowpass Filter
C2 1000pF 1000pF R2 866 1000pF
-
1/4 LT1212
1.21k
-
1/4 LT1212
+
2.10k
-
1/4 LT1212 VOUT
+
1. 21k
+
1211/12 TA03a
+
1F 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 10k 100k 1M FREQUENCY (Hz) 10M
1211/12 TA03b
1A Voltage-Controlled Current Sink
V+ V+ VIN RL IOUT 100 Si9410DY N-CHANNEL
+
1/2 LT1211
-
500pF 1k V IOUT = IN 1 tr < 1s 1
1211/12 TA05
LTC/GP 0693 10K REV 0
(c) LINEAR TECHNOLOGY CORPORATION 1993

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