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LT1464/LT1465 Dual/Quad Micropower, 1MHz C-Load Picoampere Bias Current JFET Input Op Amps
FEATURES
s
DESCRIPTION
The LT (R)1464 (dual) and LT1465 (quad) are the first micropower op amps (200A max per amp) to offer picoampere input bias currents (500fA typ) and unity-gain stability for capacitive loads up to 10nF. The output can swing a 10k load to within 1.5V of either supply, just like op amps that require an order of magnitude more supply current. This unique combination of performance makes the LT1464/LT1465 ideal over a wide range of input and output impedances. In the design and testing of the LT1464/LT1465, particular emphasis has been placed on optimizing performance in the low cost SO-8 (dual) and 14-lead SO (quad) package for 15V and 5V supplies. The input common mode range includes the positive rail. Slew rate (0.5V/s min) and gain bandwidth product (650kHz min) are 100% tested. A full set of matching specifications is also provided.
, LTC and LT are registered trademarks of Linear Technology Corporation. C-Load is a trademark of Linear Technology Corporation.
s s s s s s s s s
Input Bias Current: 2pA Max (LT1464A) 20pA Max (LT1464, LT1465) Supply Current per Amplifier: 200A Max Gain Bandwidth Product: 1MHz Typ Slew Rate: 0.9V/s Typ Input Common Mode Range Includes Positive Rail Unity-Gain Stable for C-LoadTM Up to 10nF Open-Loop Gain: 1 Million Typ Guaranteed Specs with 5V, 15V Supplies Guaranteed Matching Specifications Standard Pinout: SO-8, SO-14 Package
APPLICATIONS
s s s s
Battery-Powered Systems Photocurrent Amplifiers Low Frequency, Micropower Active Filters Low Droop Track-and-Hold Circuits
TYPICAL APPLICATION
Micropower Low Droop Track-and-Hold/Peak Detector
V+ 1/4 LTC201 13 A 16 1 MCT2 4 V- 5 14 V+ 2 7 R1* 1 MCT2 2 2 5 3 6 4 5 3 6 4 2 5 15 C1 10nF POLYSTYRENE
Small-Signal Response, CLOAD = 10nF
+
1/2 LT1464
- +
8 1 VOUT
1/2 LT1464 4 V- TYPICAL DROOP =
IN 1/4 LTC201 B 1
6
-
LT1464 * TA01
0.5pA = 0.05mV/s 10nF TOTAL SUPPLY CURRENT = 460 A MAX * R1 = 600 FOR 15V SUPPLIES R1 = 0 FOR 5V SUPPLIES
AV = 1 VS = 5V, 15V CL = 10nF
FUNCTION Track-and-Hold Positive Peak Detector Negative Peak Detector
MODE Track Reset Reset
IN A IN B 0 0 0 0 0 0
MODE IN A IN B Hold 1 1 Store 0 1 Store 1 0
LTC201 switch is open for logic "1".
U
U
U
1464 * TA02
1
LT1464/LT1465
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ..................................................... 20V Differential Input Voltage ...................................... 40V Input Current ....................................................... 20mA Output Short-Circuit Duration ......................... Indefinite Operating Temperature Range ............... - 40C to 85C Specified Temperature Range ................ - 40C to 85C Maximum Junction Temperature ......................... 150C Storage Temperature Range ................ - 65C to 150C Lead Temperature (Soldering, 10 sec)................. 300C
PACKAGE/ORDER INFORMATION
TOP VIEW OUT A 1 -IN A 2 +IN B 3 V- 4 A B 8 7 6 5 V+ OUT B -IN B +IN B
ORDER PART NUMBER LT1464ACN8 LT1464ACS8 LT1464CN8 LT1464CS8 S8 PART MARKING 1464A 1464
N8 PACKAGE 8-LEAD PDIP
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 150C, JA = 130C/ W (N) TJMAX = 150C, JA = 190C/ W (S)
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER VOS IOS IB en Input Offset Voltage Input Offset Current Input Bias Current Input Noise Voltage Input Noise Voltage Density Input Noise Current Density CMRR PSRR RIN Common Mode Rejection Ratio Power Supply Rejection Ratio Input Resistance--Differential Common Mode Common Mode Input Capacitance Large-Signal Voltage Gain VO = 10V, RL = 10k VO = 10V, RL = 2k VS = 5V VS = 15V VS = 5V VS = 15V VS = 5V VS = 15V 0.1Hz to 10Hz fO = 10Hz fO = 1000Hz
VS = 15V, VCM = 0V, TA = 25C, unless otherwise noted.
MIN LT1464AC TYP MAX 0.4 0.6 0.2 0.5 0.4 0.5 2 33 24 0.4 76 81 85 90 1012 1012 011 3 350 150 100 50 1000 450 250 170 300 150 100 50 74 78 0.8 2.0 1.2 2.0 2.0 3.0 LT1464C/LT1465C MIN TYP MAX 0.4 0.6 0.5 0.5 2 33 24 0.4 85 90 1012 1012 1011 3 900 450 250 170 0.8 2.0 15 20 UNITS mV mV pA pA pA pA VP-P nV/Hz nV/Hz fA/Hz dB dB pF V/mV V/mV V/mV V/mV
CONDITIONS (Note 1)
fO = 10Hz, 1kHz (Note 3) VCM = - 12.5V to 15V VS = 2.5V to 20V VCM = - 12.5V to 8V VCM = 8V to 15V
CIN AVOL
VS = 5V, VO = 2V, RL = 10k VS = 5V, VO = 1V, RL = 2k
2
U
U
W
WW U
W
TOP VIEW OUT A 1 -IN A 2 +IN A 3 V+ 4 B C A D 14 OUT D 13 -IN D 12 +IN D 11 V - 10 +IN C 9 8 -IN C OUT C
ORDER PART NUMBER LT1465CN LT1465CS
+IN B 5 -IN B 6 OUT B 7
N PACKAGE 14-LEAD PDIP
S PACKAGE 14-LEAD PLASTIC SO
TJMAX = 150C, JA = 110C/ W (N) TJMAX = 150C, JA = 150C/ W (S)
LT1464/LT1465
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER VOUT Output Voltage Swing
VS = 15V, VCM = 0V, TA = 25C, unless otherwise noted.
MIN 13.5 13.3 3.5 0.5 650 LT1464AC TYP MAX 13.7 13.5 3.7 0.9 1000 145 135 132 0.5 0.8 0.4 0.5 74 78 85 88 1.3 3.3 3.0 4.0 71 74 200 200 LT1464C/LT1465C MIN TYP MAX 13.5 13.3 3.5 0.5 650 13.7 13.5 3.7 0.9 1000 145 135 132 0.5 0.8 0.5 85 88 1.3 3.3 30 200 200 UNITS V V V V/s kHz A A dB mV mV pA pA dB dB
CONDITIONS (Note 1) RL = 10k RL = 2k VS = 5V, RL = 2k RL = 10k (Note 4) f = 10kHz VS = 5V
SR GBW IS
Slew Rate Gain Bandwidth Product Supply Current per Amplifier Channel Separation
f = 10Hz, VO = 10V, RL = 10k VS = 5V VS = 15V VS = 5V VS = 15V (Notes 5, 7) (Notes 5, 7)
VOS IB+ CMRR PSRR
Offset Voltage Match (Note 7) Noninverting Bias Current Match (Note 7) Common Mode Rejection Match Power Supply Rejection Match
VS = 15V, VCM = 0V, 0C TA 70C, unless otherwise noted.
SYMBOL PARAMETER VOS VOS Temp IOS IB CMRR PSRR AVOL Input Offset Voltage Average Input Offset Voltage Drift Input Offset Current Input Bias Current Common Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain VCM = - 12V to 15V VS = 3V to 20V VO = 10V, RL = 10k VO = 10V, RL = 2k VS = 5V, VO = 2V, RL = 10k VS = 5V, VO = 1V, RL = 2k VOUT Output Voltage Swing RL = 10k RL = 2k VS = 5V, RL = 2k RL = 10k (Note 4) f = 10kHz VS = 5V Offset Voltage Match (Note 7) Noninverting Bias Current Match (Note 7) VS = 5V VS = 15V CONDITIONS (Note 1) VS = 5V VS = 15V (Note 6)
q q q
MIN
LT1464AC TYP MAX 0.5 0.9 7 10 60 1.4 2.8 20 50 150
LT1464C/LT1465C MIN TYP MAX 0.5 0.9 7 25 150 73 77 200 100 80 45 13.4 13.2 3.4 0.4 540 85 89 600 350 200 150 13.6 13.4 3.6 0.8 870 160 150 0.7 0.9 35 220 220 2.0 3.5 500 1.4 2.8 20 450 750
UNITS mV mV V/C pA pA dB dB V/mV V/mV V/mV V/mV V V V V/s kHz A A mV mV pA
q q q q q q q q q q q q q q q q q q
75 80 200 100 80 45 13.4 13.2 3.4 0.4 540
85 89 600 350 200 150 13.6 13.4 3.6 0.8 870 160 150 0.7 0.9 5 220 220 2.0 3.5 40
SR GBW IS VOS IB+
Slew Rate Gain Bandwidth Product Supply Current per Amplifier
3
LT1464/LT1465
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CMRR PSRR Common Mode Rejection Match Power Supply Rejection Match (Notes 5, 7) (Notes 5, 7)
VS = 15V, VCM = 0V, 0C TA 70C, unless otherwise noted.
MIN
q q
CONDITIONS (Note 1)
LT1464AC TYP MAX 84 85
LT1464C/LT1465C MIN TYP MAX 70 73 84 85
UNITS dB dB
73 77
VS = 15V, VCM = 0V, - 40C TA 85C (Note 2), unless otherwise noted.
SYMBOL PARAMETER VOS VOS Temp IOS IB CMRR PSRR AVOL Input Offset Voltage Average Input Offset Voltage Drift Input Offset Current Input Bias Current Common Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain VCM = -12V to 15V VS = 3V to 20V VO = 10V, RL = 10k VO = 10V, RL = 2k VS = 5V, VO = 2V, RL = 10k VS = 5V, VO = 1V, RL = 2k VOUT Output Voltage Swing RL = 10k RL = 2k VS = 5V, RL = 2k RL = 10k (Note 4) f = 10kHz VS = 5V Offset Voltage Match (Note 7) Noninverting Bias Current Match (Note 7) Common Mode Rejection Match Power Supply Rejection Match (Notes 5, 7) (Notes 5, 7) VS = 5V VS = 15V CONDITIONS (Note 1) VS = 5V VS = 15V (Note 6)
q q q
MIN
LT1464AC TYP MAX 0.6 1.0 7 40 200 1.5 3.0 20 150 500
LT1464C/LT1465C MIN TYP MAX 0.6 1.0 7 60 300 72 76 175 80 70 45 13.2 13.0 3.2 0.35 510 84 88 400 250 180 140 13.4 13.2 3.4 0.7 850 165 160 0.8 1.0 70 69 73 83 81 230 230 2.5 4.0 800 1.5 3.0 20 700 2500
UNITS mV mV V/C pA pA dB dB V/mV V/mV V/mV V/mV V V V V/s kHz A A mV mV pA dB dB
q q q q q q q q q q q q q q q q q q q q
74 79 175 80 70 45 13.2 13.0 3.2 0.35 510
84 88 400 250 180 140 13.4 13.2 3.4 0.7 850 165 160 0.8 1.0 20 230 230 2.5 4.0 100
SR GBW IS VOS IB+ CMRR PSRR
Slew Rate Gain Bandwidth Product Supply Current per Amplifier
72 76
83 81
The q denotes specifications which apply over the full operating temperature range. Note 1: Typical parameters are defined as 60% yield of parameter distributions of individual amplifiers, i.e., out of 100 LT1465s (or 100 LT1464s) typically 240 op amps (or 120) will be better than the indicated specification. Note 2: The LT1464 and LT1465 are designed, characterized and expected to meet these extended temperature limits, but are not tested at - 40C and 85C. Guaranteed I grade parts are available, consult factory. Note 3: Current noise is calculated from the formula: in = (2qib)1/2 where q = (1.6)(10)-19 coulomb. The noise of source resistors up to 1G swamps the contribution of current noise.
Note 4: Slew rate is measured in AV = -1; input signal is 7.5V, output is measured at 2.5V. Note 5: CMRR and PSRR are defined as follows: 1. CMRR and PSRR are measured in V/V on the individual amplifiers. 2. The difference is calculated between the matching sides in V/V. 3. The result is converted to dB. Note 6: This parameter is not 100% tested. Note 7: Matching parameters are the difference between amplifiers A and D and between B and C on the LT1465; between the two amplifiers on the LT1464.
4
LT1464/LT1465 TYPICAL PERFORMANCE CHARACTERISTICS
Input Bias and Offset Current vs Temperature
10000
INPUT BIAS AND OFFSET CURRENT (pA)
LT1464/LT1465 LT1464A 1000
INPUT BIAS CURRENT (pA)
60 50 40 30 20 10 0
COMMON MODE RANGE (V)
100 BIAS CURRENT
10 OFFSET CURRENT 1 0 25 75 100 50 AMBIENT TEMPERATURE (C) 125
Supply Current vs Temperature
200
RMS VOLTAGE NOISE DENSITY (nV/Hz)
SUPPLY CURRENT PER AMPLIFIER (A)
175 VS = 15V 150 125 100 75 50 25 50 75 -75 -50 -25 0 TEMPERATURE (C) VS = 5V
50
30 1/f CORNER = 9Hz 20
10
100 125
LT1464 * TPC04
NOISE VOLTAGE (2V/DIV)
Voltage Gain vs Temperature
1.4k 1.2k VO = 10V, VS = 15V VO = 2V, RL = 10k, VS = 5V VO = 1V, RL = 2k, VS = 5V RL = 10k, VS = 15V RL = 2k, VS = 15V
SLEW RATE (V/s)
1k 800 600 400 200
CHANNEL SEPARATION (dB)
VOLTAGE GAIN (V/mV)
0 -75 -50 -25
RL = 2k, VS = 5V RL = 10k, VS = 5V 0 25 50 75 100 125 150 TEMPERATURE (C)
LT1464 * TPC07
UW
LT1464 * TPC01
Input Bias Current Over the Common Mode Range
80 70
16
Common Mode Range vs Temperature
15 14 13 12
VS = 15V TA = 25C
-11 -12 -13 -14 -15 VS = 15V -75 -50 -25 0 25 50 75 TEMPERATURE (C) 100 125
LT1464 * TPC03
-10 -15
-5 0 -10 5 10 COMMON MODE INPUT VOLTAGE (V)
15
LT1464 * TPC02
Voltage Noise vs Frequency
100 70 VS = 15V TA = 25C
0.1Hz to 10Hz Noise
3
10
30
100 300 1k FREQUENCY (Hz)
3k
10k
0
2
6 4 TIME (SEC)
8
10
LT1464 * TPC05
LT1464 * TPC06
Slew Rate, Gain Bandwidth Product vs Temperature
1.75 SLEW FALL 1.5
Channel Separation vs Frequency
160 VS = 15V TA = 25C VIN = 10VP-P RL = 10k
1.50
1.3
140
GAIN BANDWIDTH (MHz)
1.25 GAIN BANDWIDTH 1.00 SLEW RISE 0.75 VS = 15V 0.50 -75 -50 -25
1.1
120
0.9
100
0.7
80
0.5 0 25 50 75 100 125 150 TEMPERATURE (C)
LT1464 * TPC08
60 10 100 10k 1k FREQUENCY (Hz) 100k 1M
LT1464 * TPC09
5
LT1464/LT1465 TYPICAL PERFORMANCE CHARACTERISTICS
Gain and Phase vs Frequency
70 60 50 VS = 15V TA = 25C PHASE 80 PHASE MARGIN = 66, CL = 10pF 60 40 20 GAIN 0 -20 -40 0.1 1 FREQUENCY (MHz) 10
LT1464 * TPC10
VOLTAGE GAIN (dB)
CMRR (dB)
60
PSRR (dB)
40 30 20 10 0 -10 0.01
Phase Margin vs CLOAD
100 90 80 VS = 15V TA = 25C
OUTPUT IMPEDANCE ()
PHASE MARGIN (DEG)
CMRR, PSRR (dB)
70 60 50 40 30 20 10 0 1 100 1000 10 CAPACITIVE LOAD (pF) 10000
Large-Signal Response, VS = 15V
20mV/DIV
0V
0V
50mV/DIV
5V/DIV
AV = 1 CL = 10pF
20s/DIV
LT1464 * TPC16
6
UW
LT1464 * TPC13
Common Mode Rejection Ratio vs Frequency
120 100
Power Supply Rejection Ratio vs Frequency
120 TA = 25C 100 80 60 40 NEGATIVE SUPPLY POSITIVE SUPPLY
100 VS = 15V TA = 25C 80 PHASE MARGIN (DEG)
40
20
20 0
0 10 100 10k 1k FREQUENCY (Hz) 10k 1M
10
100
1k 10k FREQUENCY (Hz)
100k
1M
LT1464 * TPC11
LT1464 * TPC12
Common Mode and Power Supply Rejections vs Temperature
100 95 90 CMRR 85 80 75 70 25 50 75 -75 -50 -25 0 TEMPERATURE (C) 0.1 100 125
LT1464 * TPC14
Closed-Loop Output Impedance
1000 VS = 15V TA = 25C AV = 1 CL = 0pF
VS = 2.5V TO 20V FOR PSRR VS = 15V, VCM = -12V TO 15V FOR CMRR PSRR 100
10
CL = 1000pF CL = 10nF
1
10
100
1k 10k 100k FREQUENCY (Hz)
1M
10M
LT1464 * TPC15
Small-Signal Response, VS = 5V, 15V
Small-Signal Response, VS = 5V, 15V, CLOAD = 1000pF
0V
AV = 1 CL = 10pF
0.5s/DIV
LT1464 * TPC17
AV = 1 CL = 1000pF
5s/DIV
LT1464 * TPC18
LT1464/LT1465
APPLICATIONS INFORMATION
Phase Reversal Protection Most industry standard JFET input single, dual and quad op amps exhibit phase reversal at the output when the negative common mode limit at the input is exceeded. Common mode range is at a premium at 5V supplies. The Figures show a 5.2V sine wave input (Figure 1a), the response of a competing JFET input op amp in the unitygain follower mode (Figure 1b) and the response of the LT1464/LT1465 (Figure 1c). The phase reversal of Figure 1b can cause lock-up in servo systems. The LT1464/LT1465 does not phase-reverse when the common mode input is anywhere within the supplies.
(1a) 5.2V Sine Wave
LT1464 * F01a
Figure 1. Voltage Follower with Input Exceeding the Common Mode Range (VS = 5V)
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W
U
U
LT1464 * F01b
(1b) Typical JFET Input Op Amp with 5V Supplies
LT1464 * F01c
(1c) LT1464/LT1465 Output with 5V Supplies
7
LT1464/LT1465
TYPICAL APPLICATIONS
Low Voltage 0.016% Voltage to Frequency Converter
LT1009 VREF = -2.5V
RIN 6.19k GAIN 2.5k 5V 6
VIN 0V TO 5V
10Hz 4th Order Chebyshev Lowpass Filter (0.01dB Ripple)
VIN C2 100nF
1/4 LT1465
-15V
TYPICAL OFFSET 0.6mV 1% TOLERANCES FOR VIN = 10VP-P,V OUT = -110dB AT f > 300Hz V OUT = -6dB AT f = 16Hz THE LOW INPUT BIAS CURRENTS ALLOW THE USE OF HIGH RESISTOR VALUES
8
+
+
3
11
C4 330nF
12
-
-
R1 237k
U
-5V
R3 1k
17 5V 8 1/2 LTC(R)1043 7
C4 1F
11 14 13
fOUT: 0kHz to 30kHz fOUT =
(
VIN 1 (RIN)(CIN) VREF
)( )
4
12
16 CIN 0.01F
- +
8 7
C1 0.1F
1/2 LT1464 5 4 -5V R1 20k
C2 30pF
R3 330k
Q1 2N2907A -5V
C3 1F
LT1464 * TA03
R2 237k C1 33nF 15V 2 4 1 R4 154k R6 249k 13
R5 154k C3 10nF
R3 249k
1/4 LT1465
14
VOUT
LT1464 * TA05
LT1464/LT1465
SI PLIFIED SCHE ATIC
VCC
R6
R3 Q3 x4
J3
+IN - IN
J1 J2 VCC C1 Q15 Q11 VEE Q28 R16 Q25 Q24
10A
Q14
W
Q8
W
R20 R4 R5 R7 Q17
Q4
Q5
Q7
R17
Q22
Q18 Q20
J4
J5 Q16 R10 C2 R22
R18 OUT
VCC Q29 R1O Q21 Q23 Q19 R19
Q13
VEE
Q1
Q2
Q9
Q10
Q26
Q27
R5
R1
R2
R5
R10
1464 SS
VEE
9
LT1464/LT1465
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
N8 Package 8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.400* (10.160) MAX 8 7 6 5
0.300 - 0.325 (7.620 - 8.255)
0.009 - 0.015 (0.229 - 0.381)
(
+0.025 0.325 -0.015 8.255 +0.635 -0.381
)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0- 8 TYP
0.016 - 0.050 0.406 - 1.270 *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
10
U
0.255 0.015* (6.477 0.381)
1
2
3
4 0.130 0.005 (3.302 0.127)
0.045 - 0.065 (1.143 - 1.651)
0.065 (1.651) TYP 0.005 (0.127) MIN 0.100 0.010 (2.540 0.254) 0.125 (3.175) MIN 0.018 0.003 (0.457 0.076) 0.015 (0.380) MIN
N8 0695
S8 Package 8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 - 0.197* (4.801 - 5.004) 8 7 6 5
0.228 - 0.244 (5.791 - 6.197)
0.150 - 0.157** (3.810 - 3.988)
1
2
3
4
0.053 - 0.069 (1.346 - 1.752)
0.004 - 0.010 (0.101 - 0.254)
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) BSC
SO8 0695
LT1464/LT1465
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
N Package 14-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.770* (19.558) MAX 14 13 12 11 10 9 8
0.300 - 0.325 (7.620 - 8.255)
0.009 - 0.015 (0.229 - 0.381) 0.005 (0.125) MIN 0.100 0.010 (2.540 0.254) *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) +0.025 0.325 -0.015 +0.635 8.255 -0.381
(
)
0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254)
0 - 8 TYP
0.016 - 0.050 0.406 - 1.270
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
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.
U
0.255 0.015* (6.477 0.381)
1 0.130 0.005 (3.302 0.127) 0.015 (0.380) MIN
2
3
4
5
6
7
0.045 - 0.065 (1.143 - 1.651)
0.065 (1.651) TYP 0.125 (3.175) MIN 0.018 0.003 (0.457 0.076)
N14 0695
S Package 14-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.337 - 0.344* (8.560 - 8.738) 14 13 12 11 10 9 8
0.228 - 0.244 (5.791 - 6.197)
0.150 - 0.157** (3.810 - 3.988)
1
2
3
4
5
6
7
0.053 - 0.069 (1.346 - 1.752)
0.004 - 0.010 (0.101 - 0.254)
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) TYP
S14 0695
11
LT1464/LT1465
TYPICAL APPLICATION
Low Voltage 0.027% Frequency to Voltage Converter
R2 10k GAIN TRIM C2 1F
R1 1k -5V
VREF = -1.235V 13 C1 1F
LT1004-1.2C
fIN = FREQUENCY IN 0kHz to 30kHz
RELATED PARTS
PART NUMBER LT1057 LT1113 LT1169 LT1457 LT1462/LT1463 DESCRIPTION Dual JFET Input Precision, High Speed Op Amp Dual Low Noise, Precision, JFET Input Op Amp Dual Low Noise, Picoampere Bias Current, JFET Input Op Amp Dual Precision JFET Input Op Amp C-Load Dual/Quad Micropower, C-Load Picoampere Bias Current JFET Input Op Amps COMMENTS Fast Settling Time, 14V/s Slew Rate, 5Mhz GBW, 450V VOS (Max), 50pA IOS (Max) 6nV/Hz Input Noise Voltage Density, 480pA IB, 6.3MHz GBW 20pA IB, 8nV/Hz en, 5.3MHz GBW, 1.5pF Input Capacitance Drives 10,000pF Capacitive Load, 450V VOS (Max), 4V/C Drift 28A Supply Current Per Amplifiers Drives 10F Capacitive Load, 175kHz GBW
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417q (408)432-1900 FAX: (408) 434-0507q TELEX: 499-3977 q www.linear-tech.com
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75k*
1/4 LTC1043 14 2
5V
- +
8 1 0V TO 3V OUTPUT
1/2 LT1464 3 12 CS 1000pF 4 5V 4 -5V 17 -5V
16
V OUT = (R2)(CS)(VREF)fIN *TRW#MTR-5/120ppm
LT1464 * TA04
14645fa LT/GP 0197 5K REV A * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 1996

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