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ISL28107, ISL28207
Data Sheet June 5, 2009 FN6631.0
Precision Single and Dual Low Noise Operational Amplifiers
The ISL28107 and ISL28207 are single and dual amplifiers featuring low input bias current, low noise, and low offset and temperature drift. This makes them the ideal choice for applications requiring both high DC accuracy and AC performance. The combination of precision, low noise, and small footprint provides the user with outstanding value and flexibility relative to similar competitive parts. Applications for these amplifiers include precision active filters, medical and analytical instrumentation, precision power supply controls, and industrial controls. The ISL28107 single is available in an 8 Ld SOIC package. The ISL28207 dual amplifier will be offered in 8 Ld SOIC package. All devices are offered in standard pin configurations and operate over the extended temperature range to -40C to +125C.
Features
* Low Input Offset . . . . . . . . . . . . . . . . . . . . . . . . 75V, Max. * Input Bias Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 60pA * Superb Temperature Drift - Voltage Offset . . . . . . . . . . . . . . . . . . . . 0.65V/C, Max. - Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2pA/C * Outstanding ESD performance - Human Body Model . . . . . . . . . . . . . . . . . . . . . . . 4.5kV - Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500V - Charged Device Model . . . . . . . . . . . . . . . . . . . . . 1.5kV * Very Low Voltage Noise, 10Hz. . . . . . . . . . . . . . 14nV/Hz * Low Current Consumption (per amp . . . . . . 0.29mA, Max. * Gain-bandwidth Product. . . . . . . . . . . . . . . . . . . . . . 1MHz * Wide Supply Range . . . . . . . . . . . . . . . . . . . . .4.5V to 40V * Operating Temperature Range . . . . . . . . -40C to +125C * No Phase Reversal
Ordering Information
PART NUMBER (Note) ISL28207FBZ* Coming Soon ISL28107FBZ* PART MARKING 28207 FBZ 28107 FBZ PACKAGE (Pb-Free) 8 Ld SOIC 8 Ld SOIC PKG. DWG. # MDP0027 MDP0027
* Pb-Free (RoHS Compliant)
Applications
* Precision Instruments * Medical Instrumentation * Spectral Analysis Equipment * Geophysical Analysis Equipment * Telecom Equipment * Active Filter Blocks * Microphone Pre-amplifier * Thermocouples and RTD Reference Buffers
*Add "-T13" suffix for tape and reel.Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
Pinouts
ISL28107 (8 LD SOIC) TOP VIEW
NC -IN_A +IN_A V1 2 3 4 -+ 8 7 6 5 NC V+ VOUTA -IN_A 1 2 3 4 -+ +-
* Data Acquisition
ISL28207 (8 LD SOIC) TOP VIEW
8 7 6 5 V+ VOUTB -IN_B +IN_B
* Power Supply Control
VOUTA +IN_A NC V-
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2009. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL28107, ISL28207
Absolute Maximum Ratings
Maximum Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42V Maximum Differential Input Current . . . . . . . . . . . . . . . . . . . . 20mA Maximum Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . .42V Min/Max Input Voltage . . . . . . . . . . . . . . . . . . V- - 0.5V to V+ + 0.5V Max/Min Input current for input voltage >V+ or Thermal Information
Thermal Resistance (Typical, Note 1) JA (C/W) 8 Ld SOIC Package (ISL28207) . . . . . . . . . . . . . . 115 8 Ld SOIC Package (ISL28107) . . . . . . . . . . . . . . 120 Storage Temperature Range . . . . . . . . . . . . . . . . . -65C to +150C Pb-free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Operating Conditions
Ambient Operating Temperature Range . . . . . . . . . -40C to +125C Maximum Operating Junction Temperature . . . . . . . . . . . . . +150C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty.
NOTE: 1. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications
VS 15V, VCM = 0, VO = 0V, RL = Open, TA= +25C, unless otherwise noted. Boldface limits apply over the operating temperature range, -40C to +125C. Temperature data established by characterization. CONDITIONS MIN (Note 2) TYP 17 MAX (Note 2) 75 140 UNIT V V V/C pA pA pA/C 300 850 -13 115 115 3,000 13.5 13.2 RL = 2k to ground 13.3 13.1 13.55 145 145 50,000 13.7 13 pA pA V dB dB V/mV V V V V -13.7 -13.5 -13.2 RL = 2k to ground -13.55 -13.3 -13.1 V V V V mA mA mA 20 V
PARAMETER VOS
DESCRIPTION Offset Voltage Magnitude
VOS/T IB
Offset Voltage Drift
0.1 TA = -40C to +85C TA = +125C 60
0.65 300 850
Input Bias Current
IB/T IOS
Input Bias Current Drift
Input Offset Current TA = -40C to +85C TA = +125C
0.2 60
VCM CMRR PSRR AVOL VOH
Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Open-Loop Gain Output Voltage High
Guaranteed by CMRR test VCM = -13V to +13V VS = 2.25V to 20V VO = -13V to +13V, RL = 10k to ground RL = 10k to ground
VOL
Output Voltage Low
RL = 10k to ground
IS
Supply Current/Amplifier
RL = Open
0.21
0.29 0.35
ISC VSUPPLY
Short-Circuit Supply Voltage Range
RL = 10 to ground Guaranteed by PSRR 2.25
40
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ISL28107, ISL28207
Electrical Specifications
VS 15V, VCM = 0, VO = 0V, RL = Open, TA= +25C, unless otherwise noted. Boldface limits apply over the operating temperature range, -40C to +125C. Temperature data established by characterization. (Continued) CONDITIONS MIN (Note 2) TYP MAX (Note 2) UNIT
PARAMETER AC SPECIFICATIONS GBW enp-p en en en en in THD + N
DESCRIPTION
Gain Bandwidth Product Voltage Noise Voltage Noise Density Voltage Noise Density Voltage Noise Density Voltage Noise Density Current Noise Density Total Harmonic Distortion + Noise 0.1Hz to 10Hz, VS = 19V f = 10Hz, VS = 19V f = 100Hz, VS = 19V f = 1kHz, VS = 19V f = 10kHz, VS = 19V f = 10kHz, VS = 19V 1kHz, G = 1, VO = 3.5VRMS, RL = 2k
1 340 14 13 13 13 53 0.0035
MHz nVP-P nV/Hz nV/Hz nV/Hz nV/Hz fA/Hz %
TRANSIENT RESPONSE SR tr, tf, Small Signal Slew Rate Rise Time 10% to 90% of VOUT Fall Time 90% to 10% of VOUT ts Settling Time to 0.1% 10V Step; 10% to VOUT Settling Time to 0.01% 10V Step; 10% to VOUT tOL Output Overload Recovery Time AV = 10, RL = 10k, VO = 10VP-P AV = 1, VOUT = 100mVP-P, Rf = 0, RL = 2k to VCM AV = 1, VOUT = 100mVP-P, Rf = 0, RL = 2k to VCM AV = -1 VOUT = 10VP-P, Rg = Rf =10k, RL = 2k to VCM AV = -1, VOUT = 10VP-P, Rg = Rf =10k, RL = 2k to VCM AV = 100, VIN = 0.2V , RL = 2k to VCM 0.32 355 365 29 31.2 6 V/s ns ns s s s
Electrical Specifications
VS 5V, VCM = 0, VO = 0V, TA = +25C, unless otherwise noted. Boldface limits apply over the operating temperature range, -40C to +125C. Temperature data established by characterization. CONDITIONS MIN (Note 2) TYP 10 MAX (Note 2) 75 140 UNIT V V V/C pA pA pA/C 300 850 -3 115 115 3,000 3.5 3.2 RL = 2k to ground 3.3 3.1 3.55 145 145 50,000 3.7 3 pA pA V dB dB V/mV V V V V
PARAMETER VOS
DESCRIPTION Offset Voltage
VOS/T IB
Offset Voltage Drift
0.2 TA = -40C to +85C TA = +125C 60
0.65 300 850
Input Bias Current
IB/T IOS
Input Bias Current Drift
Input Offset Current TA = -40C to +85C TA = +125C
0.2 60
VCM CMRR PSRR AVOL VOH
Common Mode Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Open-Loop Gain Output Voltage High
Guaranteed by CMRR test VCM = -3V to +3V VS = 2.25V to 5V VO = -3V to +3V, RL = 10k to ground RL = 10k to ground
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FN6631.0 June 5, 2009
ISL28107, ISL28207
Electrical Specifications
VS 5V, VCM = 0, VO = 0V, TA = +25C, unless otherwise noted. Boldface limits apply over the operating temperature range, -40C to +125C. Temperature data established by characterization. (Continued) CONDITIONS RL = 10k to ground MIN (Note 2) TYP -3.7 MAX (Note 2) -3.5 -3.2 RL = 2k to ground -3.55 -3.3 -3.1 IS Supply Current/Amplifier RL = Open 0.21 0.29 0.35 ISC Short-Circuit 40 UNIT V V V V mA mA mA
PARAMETER VOL
DESCRIPTION Output Voltage Low
AC SPECIFICATIONS GBW THD + N Gain Bandwidth Product Total Harmonic Distortion + Noise 1kHz, G = 1, Vo = 2.5VRMS, RL = 2k 1 0.0053 MHz %
TRANSIENT RESPONSE SR tr, tf, Small Signal Slew Rate Rise Time 10% to 90% of VOUT Fall Time 90% to 10% of VOUT ts Settling Time to 0.1% 4V Step; 10% to VOUT Settling Time to 0.01% 4V Step; 10% to VOUT NOTE: 2. Parameters with MIN and/or MAX limits are 100% tested at +25C, unless otherwise specified. Temperature limits established by characterization and are not production tested. AV = 10, RL = 2k AV = 1, VOUT = 100mVP-P, Rf = 0, RL = 2k to VCM AV = 1, VOUT = 100mVP-P, Rf = 0, RL = 2k to VCM AV = -1, VOUT = 4VP-P, Rf = Rg = 2k, RL = 2k to VCM AV = -1, VOUT = 4VP-P, Rf = Rg = 2k, RL = 2k to VCM 0.32 355 370 12.4 22 V/s ns ns s s
Typical Performance Curves
200 INPUT NOISE VOLTAGE (nV) 150 100 50 0 -50 -100 -150 -200 0 1 2 3 4 5 TIME (s) 6
VS = 15V, VCM = 0V, RL = Open, unless otherwise specified.
1000 INPUT NOISE VOLTAGE (nV/Hz) V+ = 19V AV = 1
100
V+ = 19V RL = INF, CL = 4pF Rg = 10, Rf = 100k AV = 10,000 7 8 9 10
10 0.1
1
10
100
1k
10k
100k
FREQUENCY (Hz)
FIGURE 1. INPUT NOISE VOLTAGE 0.1Hz TO 10Hz
FIGURE 2. INPUT NOISE VOLTAGE SPECTRAL DENSITY
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ISL28107, ISL28207 Typical Performance Curves
1 INPUT NOISE CURRENT (pA/Hz)
VS = 15V, VCM = 0V, RL = Open, unless otherwise specified. (Continued)
100 80 PSRR- VS = 5V, VS = 15V 60 PSRR (dB)
0.1
40 20 R = INF L CL = 4pF 0 AV = +1 VSOURCE = 1VP-P PSRR+ VS = 5V, VS = 15V -20 10 100 1k 10k 100k FREQUENCY (Hz)
V+ = 19V AV = 1
0.01 0.1
1
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
FIGURE 3. INPUT NOISE CURRENT SPECTRAL DENSITY
FIGURE 4. PSRR vs. FREQUENCY, VS = 5V, 15V
160 140 120 CMRR (dB) 100 80 60 40 20 0 0.1 1 10 100 1k RL = INF CL = 4pF AV = +1 VCM = 1VP-P VOS (V)
95 75 55 35 15 -5 VS = 2.25V, 5V, 15V 10k 100k 1M 10M 100M -25 -40 -20 0 20 40 60 80 CHANNEL-B CHANNEL-A
FREQUENCY (Hz)
TEMPERATURE (C)
FIGURE 5. CMRR vs. FREQUENCY, VS = 2.25, 5V, 15V
FIGURE 6. VOS vs. TEMPERATURE
100
100 50 CHANNEL-A 0 IBIAS (pA)
50
CHANNEL-A
IBIAS (pA)
0 CHANNEL-B -50
-50 CHANNEL-B -100
-100
-150 -200 -40
-150 -40
-20
0
20
40
60
80
100
120
-20
0
20
40
60
80
100
120
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 7. IIB vs. TEMPERATURE, VS = 5V
FIGURE 8. IIB vs. TEMPERATURE, VS = 15V
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ISL28107, ISL28207 Typical Performance Curves
60 40 +125C CMRR (dB) 20 VOS (V) 0 -20 -40C -40 -60 -15 +25C
VS = 15V, VCM = 0V, RL = Open, unless otherwise specified. (Continued)
156 154 CHANNEL-A 152 150 148 CHANNEL-B 146 144
-10
-5
0
5
10
15
142 -40
-20
0
20
40
60
80
100
120
INPUT COMMON MODE VOLTAGE
TEMPERATURE (C)
FIGURE 9. INPUT OFFSET VOLTAGE vs. INPUT COMMON MODE VOLTAGE, VS = 15V
FIGURE 10. CMRR vs. TEMPERATURE, VS = 15V
144.0 143.5 143.0 PSRR (dB) 142.5 142.0 141.5 141.0 -40 CHANNEL-B PSRR (dB) CHANNEL-A
148 147 146 145 144 143 142 141 -20 0 20 40 60 80 100 120 140 -40 -20 0 20 40 60 80 100 120 CHANNEL-A CHANNEL-B
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 11. PSRR vs. TEMPERATURE, VS = 5V
FIGURE 12. PSRR vs. TEMPERATURE, VS = 15V
200 180 160 140 PHASE 120 100 80 60 40 20 GAIN 0 -20 R = 10k L -40 CL = 10pF -60 SIMULATION -80 -100 0.1m 1m 10m 100m 1 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz)
200 180 160 140 PHASE 120 100 80 60 40 20 GAIN 0 -20 R = 10k L -40 CL = 100pF -60 SIMULATION -80 -100 0.1m 1m 10m 100m 1 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz)
OPEN LOOP GAIN (dB)/PHASE ()
FIGURE 13. OPEN-LOOP GAIN, PHASE vs. FREQUENCY, RL = 10k, CL = 10pF
FIGURE 14. OPEN-LOOP GAIN, PHASE vs. FREQUENCY, RL = 10k, CL = 100pF
6
OPEN LOOP GAIN (dB)/PHASE ()
FN6631.0 June 5, 2009
ISL28107, ISL28207 Typical Performance Curves
70 60 50 40 GAIN (dB) 30 20 10 0 -10 -20 10 AV = 10 Rg = 10k, Rf = 100k AV = 1 Rg = OPEN, Rf = 0 100 1k 10k 100k 1M 10M AV = 100 AV = 1000 Rg = 100, Rf = 100k NORMALIZED GAIN (dB) Rg = 1k, Rf = 100k V+ = 20V CL = 4pF RL = 10k VOUT = 100mVP-P
VS = 15V, VCM = 0V, RL = Open, unless otherwise specified. (Continued)
8 6 4 2 0 -2 -4 V+ = 5V -6 RL = 10k CL = 4pF -8 AV = +2 -10 VOUT = 10mVP-P -12 1k 10k Rf = Rg = 100 Rf = Rg = 1k Rf = Rg = 100k Rf = Rg = 10k
100k FREQUENCY (Hz)
1M
10M
FREQUENCY (Hz)
FIGURE 15. FREQUENCY RESPONSE vs. CLOSED LOOP GAIN
FIGURE 16. FREQUENCY RESPONSE vs. FEEDBACK RESISTANCE Rf/Rg
1 0 NORMALIZED GAIN (dB) -1 -2 -3 -4 -5 -6 -7 -8 -9 V+ = 5V CL = 4pF AV = +1 VOUT = 10mVP-P 1k 10k 100k FREQUENCY (Hz) 1M 10M RL = 100k RL = 10k RL = 1k RL = 499 NORMALIZED GAIN (dB)
1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 V+ = 20V CL = 4pF AV = +1 VOUT = 100mVP-P 1k 10k RL = 100k RL = 10k RL = 1k RL = 499
100k FREQUENCY (Hz)
1M
10M
FIGURE 17. GAIN vs. FREQUENCY vs. RL
FIGURE 18. GAIN vs. FREQUENCY vs. RL
8 6 NORMALIZED GAIN (dB) 4 2 0 -2 -4 -6 -8 VS = 15V RL = 10k AV = +1 VOUT = 100mVP-P 1k 10k CL = 51pF CL = 4pF CL = 334pF NORMALIZED GAIN (dB) CL = 224pF CL = 104pF
1 0 -1 -2 -3 -4 -5 -6 -7 -8 100k FREQUENCY (Hz) 1M 10M -9 1k VS = 5V CL = 4pF AV = +1 RL = INF VOUT = 10mVP-P VOUT = 50mVP-P VOUT = 100mVP-P VOUT = 200mVP-P VOUT = 500mVP-P VOUT = 1VP-P 10k 100k FREQUENCY (Hz) 1M 10M
FIGURE 19. GAIN vs. FREQUENCY vs. CL
FIGURE 20. GAIN vs. FREQUENCY vs. OUTPUT VOLTAGE
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ISL28107, ISL28207 Typical Performance Curves
2 0 NORMALIZED GAIN (dB) -2 -4 -6 -8 -10 C = 4pF L -12 RL = 10k AV = +1 -14 VOUT = 100mVP-P -16 1k 10k VS = 20V VS = 5V VS = 15V VS = 2.25V 100k FREQUENCY (Hz) 1M 10M CROSSTALK (dB) 100 80 60 RL = 10k 40 C = 4pF L AV = +1 20 VOUT = 1VP-P 0 10 100 1k VS = 5V VS = 15V 10k 100k 1M 10M
VS = 15V, VCM = 0V, RL = Open, unless otherwise specified. (Continued)
140 120
FREQUENCY (Hz)
FIGURE 21. GAIN vs. FREQUENCY vs. SUPPLY VOLTAGE
FIGURE 22. CROSSTALK vs. FREQUENCY, VS = 5V, 15V
6 4 LARGE SIGNAL (V) 2 0 -2 -4 -6 RL = 10k RL = 2k V+ = 15V CL = 4pF AV = 11 Rf = 10k, Rg = 1k VOUT = 10VP-P
2.5 2.0 1.5 LARGE SIGNAL (V) 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 0 50 100 150 200 TIME (s) 250 300 350 400 -2.5 0 5 10 CL = 4pF AV = 1 VOUT = 4VP-P 15 20 25 30 35 VS = 5V, 15V, RL = 2k VS = 5V, 15V, RL = 10k
TIME (s)
FIGURE 23. LARGE SIGNAL 10V STEP RESPONSE, VS = 15V
FIGURE 24. LARGE SIGNAL TRANSIENT RESPONSE vs. RL VS = 5V, 15V
0.08 0.06 SMALL SIGNAL (V) 0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 0 5 10 RL = 2k, 10k CL = 4pF AV = 1 VOUT = 100mVP-P 15 20 25 TIME (s) 30 35 40 VS = 5V, 15V, 20V INPUT (V)
0.26 0.22 0.18 0.14 0.10 0.06 0.02 -0.02 -0.06 0 20 40 60 INPUT OUTPUT VS = 15V RL = 10k CL = 4pF AV = 100 Rf = 10k, Rg = 100 VIN = 200mVP-P
15 13 11 9 7 5 3 1 OUTPUT (V)
-1 80 100 120 140 160 180 200 TIME (s)
FIGURE 25. SMALL SIGNAL TRANSIENT RESPONSE VS = 5V, 15V, 20V
FIGURE 26. POSITIVE OUTPUT OVERLOAD RESPONSE TIME, VS = 15V
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ISL28107, ISL28207 Typical Performance Curves
0.06 0.02 -0.02 INPUT (V) -0.06 -0.10 -0.14 -0.18 -0.22 -0.26 0 20 40 60 VS = 15V RL = 10k CL = 4pF AV = 100 Rf = 10k, Rg = 100 VIN = 200mVP-P INPUT OUTPUT
VS = 15V, VCM = 0V, RL = Open, unless otherwise specified. (Continued)
1 -1 OVERSHOOT (%) -3 -5 -7 -9 -11 -13 OUTPUT (V) 50 45 40 35 30 25 20 15 10 5 0 1 10 100 1,000 CAPACITANCE (pF) 10,000
O RS VE
VS = 15V RL = 10k AV = 1 VOUT = 100mVP-P
O SH ER OV
OT
+
HO
OT
-
-15 80 100 120 140 160 180 200 TIME (s)
FIGURE 27. NEGATIVE OUTPUT OVERLOAD RESPONSE TIME, VS = 15V
FIGURE 28. % OVERSHOOT vs. LOAD CAPACITANCE, VS = 15V
Pin Descriptions
ISL28107 (8 LD SOIC) 3 4 ISL28207 (8 LD SOIC) 3 4 5 6 7 7 6 2 1, 5, 8
V+ 500 IN500 IN+ OUT VVCIRCUIT 2 CIRCUIT 3
PIN NAME +IN_A V+IN_B -IN_B VOUTB V+ VOUTA -IN_A NC
EQUIVALENT CIRCUIT Circuit 1 Circuit 3 Circuit 1 Circuit 1 Circuit 2 Circuit 3 Circuit 2 Circuit 1 -
DESCRIPTION Amplifier A non-inverting input Negative power supply Amplifier B non-inverting input Amplifier B inverting input Amplifier B output Positive power supply Amplifier A output Amplifier A inverting input No internal connection
8 1 2
V+
V+ CAPACITIVELY TRIGGERED ESD CLAMP
V-
CIRCUIT 1
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FN6631.0 June 5, 2009
ISL28107, ISL28207 Applications Information
Functional Description
The ISL28107 and ISL28207 are single and dual, very low 1/f noise (14nV/Hz @ 10Hz) precision op-amps. These amplifiers feature very high open loop gain (50kV/mV) for excellent CMRR (145dB), and gain accuracy. Both devices are fabricated in a new precision 40V complementary bipolar DI process. The super-beta NPN input stage with bias current cancellation provides bipolar-like levels of AC performance with the low input bias currents approaching JFET levels. The temperature stabilization provided by bias current cancellation removes the high input bias current temperature coefficient commonly found in JFET amplifiers. Figures 7 and 8 show the input bias current variation over temperature. The input offset voltage (VOS) has an very low, worst case value of 75V max at +25C and a maximum TC of 0.65V/C. Figure 6 shows VOS as a function of supply voltage and temperature with the common mode voltage at 0V for split supply operation. The complimentary bipolar output stage maintains stability driving large capacitive loads (to 10nF) without external compensation. The small signal overshoot vs. load capacitance is shown in Figure 28.
Output Current Limiting
The output current is internally limited to approximately 40mA at +25C and can withstand a short circuit to either rail as long as the power dissipation limits are not exceeded. This applies to only 1 amplifier at a time for the dual op-amp. Continuous operation under these conditions may degrade long term reliability.
Output Phase Reversal
Output phase reversal is a change of polarity in the amplifier transfer function when the input voltage exceeds the supply voltage. The ISL28107 and ISL28207 are immune to output phase reversal, even when the input voltage is 1V beyond the supplies.
Using Only One Channel
The ISL28207 is a dual op-amp. If the application only requires one channel, the user must configure the unused channel to prevent it from oscillating. The unused channel will oscillate if the input and output pins are floating. This will result in higher than expected supply currents and possible noise injection into the channel being used. The proper way to prevent this oscillation is to short the output to the inverting input and ground the positive input (as shown in Figure 29).
+
Operating Voltage Range
The devices are designed to operate over the 4.5V (2.25V) to 40V (20V) range and are fully characterized at 10V (5V) and 30V (15V). Both DC and AC performance remain virtually unchanged over the complete 4.5V to 40V operating voltage range. Parameter variation with operating voltage is shown in the "Typical Performance Curves" beginning on page 4. The input common mode voltage range sensitivity to temperature is shown in Figure 9 (15V).
FIGURE 29. PREVENTING OSCILLATIONS IN UNUSED CHANNELS
Power Dissipation
It is possible to exceed the +150C maximum junction temperatures under certain load and power supply conditions. It is therefore important to calculate the maximum junction temperature (TJMAX) for all applications to determine if power supply voltages, load conditions, or package type need to be modified to remain in the safe operating area. These parameters are related using Equation 1:
T JMAX = T MAX + JA xPD MAXTOTAL (EQ. 1)
Input ESD Diode Protection
The input terminals (IN+ and IN-) each have internal ESD protection diodes to the positive and negative supply rails, a series connected 500 current limiting resistor followed by an anti-parallel diode pair across the input NPN transistors (Circuit 1 in "Pin Descriptions" on page 9). The resistor-ESD diode configuration enables a wide differential input voltage range equal to the lesser of the Maximum Supply Voltage in the "Absolute Maximum Ratings" on page 2 (42V) or, a maximum of 0.5V beyond the V+ and V- supply voltage. The internal protection resistors eliminate the need for external input current limiting resistors in unity gain connections and other circuit applications where large voltages or high slew rate signals are present. Although the amplifier is fully protected, high input slew rates that exceed the amplifier slew rate (0.32V/s) may cause output distortion.
where: * PDMAXTOTAL is the sum of the maximum power dissipation of each amplifier in the package (PDMAX) * PDMAX for each amplifier can be calculated using Equation 2:
V OUTMAX PD MAX = V S x I qMAX + ( V S - V OUTMAX ) x --------------------------R
L
(EQ. 2)
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ISL28107, ISL28207
where: * TMAX = Maximum ambient temperature * JA = Thermal resistance of the package * PDMAX = Maximum power dissipation of 1 amplifier * VS = Total supply voltage * IqMAX = Maximum quiescent supply current of 1 amplifier * VOUTMAX = Maximum output voltage swing of the application RL = Load resistance
Revision History
DATE REVISION CHANGE
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 11
FN6631.0 June 5, 2009
ISL28107, ISL28207 Small Outline Package Family (SO)
A D N (N/2)+1 h X 45
A E E1 PIN #1 I.D. MARK c SEE DETAIL "X"
1 B
(N/2) L1
0.010 M C A B e C H A2 GAUGE PLANE A1 0.004 C 0.010 M C A B b DETAIL X
SEATING PLANE L 4 4
0.010
MDP0027
SMALL OUTLINE PACKAGE FAMILY (SO) INCHES SYMBOL A A1 A2 b c D E E1 e L L1 h N NOTES: 1. Plastic or metal protrusions of 0.006" maximum per side are not included. 2. Plastic interlead protrusions of 0.010" maximum per side are not included. 3. Dimensions "D" and "E1" are measured at Datum Plane "H". 4. Dimensioning and tolerancing per ASME Y14.5M-1994 SO-8 0.068 0.006 0.057 0.017 0.009 0.193 0.236 0.154 0.050 0.025 0.041 0.013 8 SO-14 0.068 0.006 0.057 0.017 0.009 0.341 0.236 0.154 0.050 0.025 0.041 0.013 14 SO16 (0.150") 0.068 0.006 0.057 0.017 0.009 0.390 0.236 0.154 0.050 0.025 0.041 0.013 16 SO16 (0.300") (SOL-16) 0.104 0.007 0.092 0.017 0.011 0.406 0.406 0.295 0.050 0.030 0.056 0.020 16 SO20 (SOL-20) 0.104 0.007 0.092 0.017 0.011 0.504 0.406 0.295 0.050 0.030 0.056 0.020 20 SO24 (SOL-24) 0.104 0.007 0.092 0.017 0.011 0.606 0.406 0.295 0.050 0.030 0.056 0.020 24 SO28 (SOL-28) 0.104 0.007 0.092 0.017 0.011 0.704 0.406 0.295 0.050 0.030 0.056 0.020 28 TOLERANCE MAX 0.003 0.002 0.003 0.001 0.004 0.008 0.004 Basic 0.009 Basic Reference Reference NOTES 1, 3 2, 3 Rev. M 2/07
12
FN6631.0 June 5, 2009

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