ISL28127, ISL28227 ® Data Sheet May 29, 2009 FN6633.0 Precision Single and Dual Low Noise Operational Amplifiers Features The ISL28127 and ISL28227 are very high precision amplifiers featuring very low noise, low offset voltage, low input bias current and low temperature drift making 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. • Low Input Offset . . . . . . . . . . . . . . . . . . . . . . . . 70µV, Max. • Very Low Voltage Noise . . . . . . . . . . . . . . . . . . . .2.5nV/Hz The ISL28127 single is available in an 8 Ld SOIC package. The ISL28227 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 -40°C to +125°C. • Wide Supply Range . . . . . . . . . . . . . . . . . . . . .4.5V to 40V • Gain-bandwidth Product. . . . . . . 10MHz Unity Gain Stable • Outstanding ESD performance - Human Body Model . . . . . . . . . . . . . . . . . . . . . . . 4.0kV - Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500V - Charged Device Model . . . . . . . . . . . . . . . . . . . . . 1.5kV • Operating Temperature Range . . . . . . . . -40°C to +125°C • No Phase Reversal • Pb-Free (RoHS Compliant) Ordering Information PART MARKING • Input Bias Current . . . . . . . . . . . . . . . . . . . . . . 10nA, Max. • Low Current Consumption . . . . . . . . . . . . . . . . . . . . 2.2mA Applications for these amplifiers include precision active filters, medical and analytical instrumentation, precision power supply controls, and industrial controls. PART NUMBER (Note) • Superb Offset Drift . . . . . . . . . . . . . . . . . . . 0.5µV/°C, Max. PACKAGE (Pb-Free) PKG. DWG. # Applications • Precision Instruments ISL28127FBZ* 28127 FBZ 8 Ld SOIC MDP0027 • Medical Instrumentation Coming Soon ISL28227FBZ* 28227 FBZ 8 Ld SOIC MDP0027 • Spectral Analysis Equipment *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. • Geophysical Analysis Equipment • Telecom Equipment • Active Filter Blocks • Microphone Pre-amplifier • Thermocouples and RTD Reference Buffers • Data Acquisition • Power Supply Control Pinouts ISL28227 (8 LD SOIC) TOP VIEW ISL28127 (8 LD SOIC) TOP VIEW 8 NC VOUTA 1 7 V+ -IN_A 2 3 6 VOUTA +IN_A 3 4 5 NC 4 NC 1 -IN_A 2 +IN_A V- - + V- 1 - + + - 8 V+ 7 VOUTB 6 -IN_B 5 +IN_B 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. ISL28127, ISL28227 Absolute Voltage Ratings Thermal Information Maximum Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42V Maximum Differential Input Current . . . . . . . . . . . . . . . . . . . . 20mA Maximum Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . 0.5V Min/Max Input Voltage . . . . . . . . . . . . . . . . . . V- - 0.5V to V+ + 0.5V Max/Min Input current for input voltage >V+ or <V- . . . . . . . . ±20mA Output Short-Circuit Duration (1 output at a time) . . . . . . Indefinite ESD Tolerance Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0kV Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .500V Charged Device Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5kV Thermal Resistance (Typical, Note 1) θJA (°C/W) 8 Ld SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . 120 Storage Temperature Range . . . . . . . . . . . . . . . . . -65°C to +150°C Pb-free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Operating Conditions Ambient Operating Temperature Range . . . . . . . . . -40°C to +125°C Maximum Operating Junction Temperature . . . . . . . . . . . . . +150°C 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. θJA 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 PARAMETER VOS VS ±15V, VCM = 0, VO = 0V, RL = Open, TA= +25°C, unless otherwise noted. Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data established by characterization. DESCRIPTION CONDITIONS MIN (Note 2) Offset Voltage TYP MAX (Note 2) UNIT 10 70 µV 120 µV VOS/T Offset Voltage Drift 0.1 0.5 µV/°C IOS Input Offset Current 1 10 nA 12 nA 10 nA 12 nA -13 13 V -12 12 V IB VCM CMRR PSRR Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio 1 Guaranteed by CMRR VCM = -13V to +13V 115 VCM = -12V to +12V 115 VS = ±2.25V to ±20V 115 VS = ±3V to ± 20V 115 120 dB dB 125 dB dB AVOL Open-Loop Gain VO = -13V to +13V RL = 10kΩ to ground 1000 1500 V/mV VOH Output Voltage High RL = 10kΩ to ground 13.5 13.65 V 13.2 RL = 2kΩ to ground 13.4 V 13.5 V 13.1 VOL Output Voltage Low RL = 10kΩ to ground RL = 2kΩ to ground IS Supply Current/Amplifier 2 V -13.65 -13.5 2.2 -13.5 V -13.2 V -13.4 V -13.1 V 2.8 mA 3.7 mA FN6633.0 May 29, 2009 ISL28127, ISL28227 Electrical Specifications PARAMETER ISC VSUPPLY VS ±15V, VCM = 0, VO = 0V, RL = Open, TA= +25°C, unless otherwise noted. Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data established by characterization. DESCRIPTION CONDITIONS Short-Circuit RL = 0Ω to ground Supply Voltage Range Guaranteed by PSRR MIN (Note 2) TYP MAX (Note 2) ±45 ±2.25 UNIT mA ±20 V AC SPECIFICATIONS GBW Gain Bandwidth Product 10 MHz enp-p Voltage Noise 0.1Hz to 10Hz 85 nVP-P en Voltage Noise Density f = 10Hz 3 nV/√Hz en Voltage Noise Density f = 100Hz 2.8 nV/√Hz en Voltage Noise Density f = 1kHz 2.5 nV/√Hz en Voltage Noise Density f = 10kHz 2.5 nV/√Hz in Current Noise Density f = 10kHz 0.4 pA/√Hz Total Harmonic Distortion + Noise 1kHz, G = 1, VO = 3.5VRMS, RL = 2kΩ 0.00022 % THD + N TRANSIENT RESPONSE SR tr, tf, Small Signal ts tOL Slew Rate AV = 10, RL = 2kΩ, VO = 4VP-P ±3.6 V/µs Rise Time 10% to 90% of VOUT AV = -1, VOUT = 100mVP-P, Rf = Rg = 2kΩ, RL = 2kΩ to VCM 36 ns Fall Time 90% to 10% of VOUT AV = -1, VOUT = 100mVP-P, Rf = Rg = 2kΩ, RL = 2kΩ to VCM 38 ns Settling Time to 0.1% 10V Step; 10% to VOUT AV = -1 VOUT = 10VP-P, Rg = Rf =10k, RL = 2kΩ to VCM 3.4 µs Settling Time to 0.01% 10V Step; 10% to VOUT AV = -1, VOUT = 10VP-P, RL = 2kΩ to VCM 3.8 µs Output Overload Recovery Time AV = 100, VIN = 0.2V RL = 2kΩ to VCM 1.7 µs Electrical Specifications PARAMETER VOS VS ±5V, VCM = 0, VO = 0V, TA = +25°C, unless otherwise noted. Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data established by characterization. DESCRIPTION CONDITIONS MIN (Note 2) Offset Voltage TYP MAX (Note 2) UNIT 10 70 µV 120 µV VOS/T Offset Voltage Drift 0.1 0.5 µV/°C IOS Input Offset Current 1 10 nA 12 nA 10 nA 12 nA -3 3 V -2 2 V IB VCM CMRR PSRR 1 Input Bias Current Common Mode Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio 3 Guaranteed by CMRR VCM = -3V to +3V 115 VCM = -2V to +2V 115 VS = ±2.25V to ±5V 115 VS = ±3V to ±5V 115 120 dB dB 125 dB dB FN6633.0 May 29, 2009 ISL28127, ISL28227 Electrical Specifications PARAMETER VS ±5V, VCM = 0, VO = 0V, TA = +25°C, unless otherwise noted. Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data established by characterization. (Continued) DESCRIPTION CONDITIONS MIN (Note 2) TYP MAX (Note 2) UNIT AVOL Open-Loop Gain VO = -3V to +3V RL = 10kΩ to ground 1000 1500 V/mV VOH Output Voltage High RL = 10kΩ to ground 3.5 3.65 V 3.2 RL = 2kΩ to ground 3.4 V 3.5 3.1 VOL Output Voltage Low RL = 10kΩ to ground RL = 2kΩ to ground IS ISC Supply Current/Amplifier V -3.65 -3.5 2.2 Short-Circuit -3.5 V -3.2 V -3.4 -3.1 V 2.8 mA 3.7 mA ± 45 mA 10 MHz 0.0034 % ±3.6 V/µs AC SPECIFICATIONS GBW THD + N Gain Bandwidth Product Total Harmonic Distortion + Noise 1kHz, G = 1, Vo = 2.5VRMS, RL = 2kΩ TRANSIENT RESPONSE SR tr, tf, Small Signal ts Slew Rate AV = 10, RL = 2kΩOH Rise Time 10% to 90% of VOUT AV = -1, VOUT = 100mVP-P, Rf = Rg = 2kΩ, RL = 2kΩ to VCM 36 ns Fall Time 90% to 10% of VOUT AV = -1, VOUT = 100mVP-P, Rf = Rg = 2kΩ, RL = 2kΩ to VCM 38 ns Settling Time to 0.1% AV = -1, VOUT = 4VP-P, Rf = Rg = 2kΩ, RL = 2kΩ to VCM 1.6 µs Settling Time to 0.01% AV = -1, VOUT = 4VP-P, Rf = Rg = 2kΩ, RL = 2kΩ to VCM 4.2 µs NOTE: 2. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. 4 FN6633.0 May 29, 2009 ISL28127, ISL28227 Typical Performance Curves VS = ±15V, VCM = 0V, RL = Open, unless otherwise specified. 100 INPUT NOISE VOLTAGE (nV) 80 60 PSRR (dB ) 40 20 0 -20 V+ = 38V RL = 10k CL = 3.5pF Rg = 10, Rf = 100k AV = 10,000 -40 -60 -80 -100 0 1 2 3 4 5 6 7 8 9 10 130 120 PSRR+ and PSRR- VS = ±5V 110 100 90 RL = INF 80 CL = 5.25pF 70 AV = +1 60 VS = 1VP-P 50 40 PSRR+ and PSRR- VS = ±15V 30 20 10 0 -10 10M 10 100 1k 10k 100k 1M TIME (s) FREQUENCY (Hz) FIGURE 2. PSRR vs FREQUENCY, VS = ±5V, ±15V 130 120 110 100 90 80 70 60 50 40 30 20 10 0 -10 10 25 VS = ±5V MEDIAN 20 VS = ±2.25V 15 VS = ±21V 10 VOS (µV) CMRR (dB) FIGURE 1. INPUT NOISE VOLTAGE 0.1Hz to 10Hz VS = ±15V RL = INF CL = 5.25pF AV = +1 VCM = 1VP-P 100 5 VS = ±15V 0 -5 VS = ±3V -10 -15 1k 10k 100k 1M 36 UNITS -20 -40 10M -20 0 20 FREQUENCY (Hz) 40 60 80 100 120 140 160 TEMPERATURE (°C) FIGURE 3. CMRR vs FREQUENCY, VS = ±2.25, ±5V, ±15V FIGURE 4. VOS vs TEMPERATURE vs VSUPPLY 3.0 4.5 50 UNITS MEDIAN 4.0 3.5 50 UNITS 2.5 IBIAS- 2.5 2.0 MEDIAN 2.0 3.0 IBIAS (nA) IBIAS (nA) VS = ±5V IBIAS+ IBIAS+ 1.5 1.0 IBIAS- 1.5 0.5 1.0 0.5 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) FIGURE 5. IIB vs TEMPERATURE, VS = ±15V 5 120 0 -40 -20 0 20 40 60 80 TEMPERATURE (°C) 100 120 FIGURE 6. IIB vs TEMPERATURE, VS = ±5V FN6633.0 May 29, 2009 ISL28127, ISL28227 Typical Performance Curves VS = ±15V, VCM = 0V, RL = Open, unless otherwise specified. 60 0.5 29 UNITS vs = ±5 0.0 AVERAGE 40 50 UNITS -0.5 20 -1.0 -1.5 VOS (µV) IOS (nA) (Continued) vs = ±15 MEDIAN -2.0 +25°C 0 +125°C -20 -2.5 -40°C -40 -3.0 -3.5 -40 -20 0 20 40 60 80 100 -60 120 -15 -10 TEMPERATURE (°C) FIGURE 7. IOS vs TEMPERATURE vs SUPPLY 50 UNITS -13.2 MEDIAN 10 15 50 UNITS MEDIAN -13.3 14.0 -13.4 13.9 RL = 2k -13.5 13.8 VOUT (V) VOUT (V) 5 -13.1 14.1 RL = 100k 13.7 13.6 -13.6 -13.7 13.5 -13.9 13.4 -14.0 13.3 -14.1 -40 -20 0 20 40 60 RL = 100k -13.8 RL = 2k 80 100 -14.2 -40 120 -20 0 GAIN 10 100 1k 10k 100k 1M 10M100M FREQUENCY (Hz) FIGURE 11. OPEN-LOOP GAIN, PHASE vs FREQUENCY, RL = 10kΩ, CL = 10pF 6 OPEN LOOP GAIN (dB)/PHASE (°) PHASE 40 60 80 100 120 FIGURE 10. VOL vs TEMPERATURE, VS = ±15V FIGURE 9. VOH vs TEMPERATURE, VS = ±15V 200 180 160 140 120 100 80 60 40 20 0 -20 R = 10k L -40 CL = 10pF -60 SIMULATION -80 -100 0.1m 1m 10m100m 1 20 TEMPERATURE (°C) TEMPERATURE (°C) OPEN LOOP GAIN (dB)/PHASE (°) 0 FIGURE 8. INPUT OFFSET VOLTAGE vs INPUT COMMON MODE VOLTAGE, VS = ±15V 14.2 13.2 -5 INPUT COMMON MODE VOLTAGE 200 180 160 140 120 100 80 60 40 20 0 -20 R = 10k L -40 CL = 100pF -60 SIMULATION -80 -100 0.1m 1m 10m100m 1 PHASE GAIN 10 100 1k 10k 100k 1M 10M100M FREQUENCY (Hz) FIGURE 12. OPEN-LOOP GAIN, PHASE vs FREQUENCY, RL = 10kΩ, CL = 100pF FN6633.0 May 29, 2009 ISL28127, ISL28227 Typical Performance Curves VS = ±15V, VCM = 0V, RL = Open, unless otherwise specified. 70 Rg = 100, Rf = 100k Rg = 1k, Rf = 100k GAIN (dB) 50 40 AV = 100 VS = ±15V CL = 3.5pF RL = INF VOUT = 100mVP-P 30 20 AV = 10 Rg = 10k, Rf = 100k 10 0 NORMALIZED GAIN (dB) 60 15 AV = 1000 AV = 1 -10 100 Rg = OPEN, Rf = 0 1k 10k 100k 1M FREQUENCY (Hz) 10M 1 5 3 VS = ±15V RL = 10k 1 CL = 3.5pF -1 A = +2 V -3 VOUT = 100mVP-P 1k 0 -1 RL = 499 -2 RL = 100 VS = ±15V CL = 3.5pF AV = +1 VOUT = 100mVP-P 10k RL = 49.9 5 4 100k 1M FREQUENCY (Hz) 10M 1M 10M 100M CL = 100pF CL = 25.5pF 1 0 -1 CL = 3.5pF 1k VS = ±5V CL = 3.5pF RL = 10k AV = +1 VOUT = 100mVP-P 100k 1M 10M 100M FREQUENCY (Hz) FIGURE 17. GAIN vs FREQUENCY vs SUPPLY VOLTAGE 7 10k 100k 1M FREQUENCY (Hz) 10M 100M 100 VS = ±15V 10k CL = 220pF FIGURE 16. GAIN vs FREQUENCY vs CL 0 -1 CL = 1000pF 2 -3 100M VS = ±2.25V 1k 100k -2 INPUT NOISE VOLTAGE (nV/√Hz) NORMALIZED GAIN (dB) 1 -3 10k 3 FIGURE 15. GAIN vs FREQUENCY vs RL -2 Rf = Rg = 100 VS = ±15V RL = 10k AV = +1 VOUT = 100mVP-P 6 RL = 1k NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) Rf = Rg = 1k 7 7 RL = 10k -5 1k 9 FIGURE 14. FREQUENCY RESPONSE vs FEEDBACK RESISTANCE Rf/Rg 2 -4 Rf = Rg = 10k 11 FREQUENCY (Hz) FIGURE 13. FREQUENCY RESPONSE vs CLOSED LOOP GAIN -3 Rf = Rg = 100k 13 -5 100M (Continued) VS = ±19V AV = 1 10 1 0.1 1 10 100 1k 10k 100k FREQUENCY (Hz) FIGURE 18. INPUT NOISE VOLTAGE SPECTRAL DENSITY FN6633.0 May 29, 2009 ISL28127, ISL28227 Typical Performance Curves VS = ±15V, VCM = 0V, RL = Open, unless otherwise specified. 6 5 VS = ±19V AV = 1 4 LARGE SIGNAL (V) 10 1 VS = ±15V CL = 3.5pF AV = 1 Rf = 10k, Rg = 1k VOUT = 10VP-P 3 2 1 0 1 -2 -3 RL = 2k RL = 10k -4 -5 0.1 0.1 1 10 100 1k 10k -6 100k 0 5 10 15 TIME (µs) FREQUENCY (Hz) 80 2.0 1.6 60 SMALL SIGNAL (mV) 2.4 1.2 0.8 VS = ±15V, RL = 2k, 10k 0.4 0 -0.4 VS = ±5V, RL = 2k, 10k -0.8 -1.2 CL = 3.5pF AV = 1 VOUT = 4VP-P -1.6 -2.0 -2.4 0 5 10 15 30 35 INPUT (V) -0.02 VS = ±15V RL = 10k CL = 3.5pF AV = 100 Rf = 100k, Rg = 1k VIN = 200mVP-P -0.26 5 10 15 20 25 TIME (µs) 30 11 0.08 5 35 FIGURE 23. POSITIVE OUTPUT OVERLOAD RESPONSE TIME, VS = ±15V 8 0.22 7 OUTPUT 0 RL = 2k CL = 3.5pF AV = 1 VOUT = 100mVP-P 40 13 9 -0.18 -0.20 20 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.26 OUTPUT (V) INPUT -0.14 0 FIGURE 22. SMALL SIGNAL TRANSIENT RESPONSE, VS = ±5V, ±15V 15 -0.10 VS = ±5V, ±15V TIME (ms) 0.06 -0.06 20 80 0 40 FIGURE 21. LARGE SIGNAL TRANSIENT RESPONSE vs RL VS = ±5V, ±15V 0.02 30 40 60 20 25 TIME (µs) 25 FIGURE 20. LARGE SIGNAL 10V STEP RESPONSE, VS = ±15V INPUT (V) LARGE SIGNAL (V) FIGURE 19. INPUT NOISE CURRENT SPECTRAL DENSITY 20 2 OUTPUT 0.04 0.10 0.06 3 0.02 1 -0.02 -1 40 -0.06 0 VS = ±15V RL = 10k CL = 3.5pF AV = 100 Rf = 100k, Rg = 1k VIN = 200mVP-P -2 INPUT -10 -4 -6 -8 OUTPUT (V) INPUT NOISE CURRENT (pA/√Hz) 100 (Continued) -12 0 5 10 15 20 25 TIME (µs) 30 35 -14 40 FIGURE 24. NEGATIVE OUTPUT OVERLOAD RESPONSE TIME, VS = ±15V FN6633.0 May 29, 2009 ISL28127, ISL28227 Typical Performance Curves VS = ±15V, VCM = 0V, RL = Open, unless otherwise specified. (Continued) 90 80 OVERSHOOT (%) 70 60 VS = ±15V RL = 10k AV = 1 VOUT = 100mVP-P 50 O 40 H RS VE 30 20 O OO HO RS VE T+ OT - 10 0 10 100 1000 CAPACITANCE (pF) 10000 FIGURE 25. % OVERSHOOT vs LOAD CAPACITANCE, VS = ±15V Pin Descriptions ISL28127 (8 LD SOIC) ISL28227 (8 LD SOIC) PIN NAME EQUIVALENT CIRCUIT 3 3 +IN_A Circuit 1 Amplifier A non-inverting input 4 4 V- Circuit 3 Negative power supply 5 +IN_B Circuit 1 Amplifier B non-inverting input 6 -IN_B Circuit 1 Amplifier B inverting input 7 VOUTB Circuit 2 Amplifier B output 7 8 V+ Circuit 3 Positive power supply 6 1 VOUTA Circuit 2 Amplifier A output 2 2 -IN_A Circuit 1 Amplifier A inverting input NC - 1, 5, 8 V+ IN- V+ V+ CAPACITIVELY TRIGGERED ESD CLAMP V- V- VCIRCUIT 2 9 No internal connection OUT IN+ CIRCUIT 1 DESCRIPTION CIRCUIT 3 FN6633.0 May 29, 2009 ISL28127, ISL28227 Applications Information Functional Description The ISL28127 and ISL28227 are single and dual, low noise 10MHz BW precision op amps. Both devices are fabricated in a new precision 40V complementary bipolar DI process. A super-beta NPN input stage with input bias current cancellation provides low input bias current (1nA typical), low input offset voltage (10µV typ), low input noise voltage (3nV/√Hz), and low 1/f noise corner frequency (3Hz). These amplifiers also feature high open loop gain (1400V/mV) for excellent CMRR (120dB) and THD+N performance (0.0002% @ 3.5VRMS, 1kHz into 2kΩ). A complimentary bipolar output stage enables high capacitive load drive without external compensation. input is at 10V, The input differential voltage of 6.4V will force input ESD diodes to conduct, dumping the input current directly into the output stage and the load. The resulting current flow can cause permanent damage to the ESD diodes. The ESD diodes are rated to 20mA, and in the previous example, setting RIN to 1k resistor (Figure 26) would limit the current to < 6.4mA, and provide additional protection up to ±20V at the input. In applications where one or both amplifier input terminals are at risk of exposure to high voltage, current limiting resistors may be needed at each input terminal (see Figure 27 RIN+, RIN-) to limit current through the power supply ESD diodes to 20mA. Operating Voltage Range V+ 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). Parameter variation with operating voltage is shown in the “Typical Performance Curves” beginning on page 5. The input common mode voltage sensitivity to temperature is shown in Figure 19 (±15V). Figure 20 shows VOS as a function of supply voltage and temperature with the common mode voltage at 0V for split supply operation. The input terminals (IN+ and IN-) have internal ESD protection diodes to the positive and negative supply rails, and an additional anti-parallel diode pair across the inputs (Figures 26 and 27). V+ - VIN VOUT + RL V- FIGURE 26. INPUT ESD DIODE CURRENT LIMITING - UNITY GAIN For unity gain applications (Figure 26) where the output is connected directly to the non-inverting input a current limiting resistor (RIN) will be needed under the following conditions to protect the anti-parallel differential input protection diodes. • The amplifier input is supplied from a low impedance source. • The input voltage rate-of-rise (dV/dt) exceeds the maximum slew rate of the amplifier (±3.6V/µs). If the output lags far enough behind the input, the anti-parallel input diodes can conduct. For example, if an input pulse ramps from 0V to +10V in 1µs, then the output of the ISL28x27 will reach only +3.6V (slew rate = 3.6V/µs) while the 10 RINRIN+ VIN+ - VOUT + RL V- FIGURE 27. INPUT ESD DIODE CURRENT LIMITING DIFFERENTIAL INPUT Input ESD Diode Protection RIN VIN- Output Current Limiting The output current is internally limited to approximately ±45mA at +25°C and can withstand an 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 ISL28127 and ISL28227 are immune to output phase reversal, even when the input voltage is 1V beyond the supplies. Power Dissipation It is possible to exceed the +150°C 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 + θ JA xPD MAXTOTAL (EQ. 1) FN6633.0 May 29, 2009 ISL28127, ISL28227 where: where: • PDMAXTOTAL is the sum of the maximum power dissipation of each amplifier in the package (PDMAX) • TMAX = Maximum ambient temperature • PDMAX for each amplifier can be calculated using Equation 2: • θJA = Thermal resistance of the package • PDMAX = Maximum power dissipation of 1 amplifier • VS = Total supply voltage V OUTMAX PD MAX = V S × I qMAX + ( V S - V OUTMAX ) × ---------------------------R L (EQ. 2) • IqMAX = Maximum quiescent supply current of 1 amplifier • VOUTMAX = Maximum output voltage swing of the application RL = Load resistance Revision History DATE REVISION CHANGE 5/28/09 FN6633.0 Techdocs Issued File Number FN6633. Initial release of Datasheet with file number FN6633 making this a Rev 0. 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 FN6633.0 May 29, 2009 ISL28127, ISL28227 Small Outline Package Family (SO) A D h X 45° (N/2)+1 N A PIN #1 I.D. MARK E1 E c SEE DETAIL “X” 1 (N/2) B L1 0.010 M C A B e H C A2 GAUGE PLANE SEATING PLANE A1 0.004 C 0.010 M C A B L b 0.010 4° ±4° DETAIL X MDP0027 SMALL OUTLINE PACKAGE FAMILY (SO) INCHES SYMBOL SO-14 SO16 (0.300”) (SOL-16) SO20 (SOL-20) SO24 (SOL-24) SO28 (SOL-28) TOLERANCE NOTES A 0.068 0.068 0.068 0.104 0.104 0.104 0.104 MAX - A1 0.006 0.006 0.006 0.007 0.007 0.007 0.007 ±0.003 - A2 0.057 0.057 0.057 0.092 0.092 0.092 0.092 ±0.002 - b 0.017 0.017 0.017 0.017 0.017 0.017 0.017 ±0.003 - c 0.009 0.009 0.009 0.011 0.011 0.011 0.011 ±0.001 - D 0.193 0.341 0.390 0.406 0.504 0.606 0.704 ±0.004 1, 3 E 0.236 0.236 0.236 0.406 0.406 0.406 0.406 ±0.008 - E1 0.154 0.154 0.154 0.295 0.295 0.295 0.295 ±0.004 2, 3 e 0.050 0.050 0.050 0.050 0.050 0.050 0.050 Basic - L 0.025 0.025 0.025 0.030 0.030 0.030 0.030 ±0.009 - L1 0.041 0.041 0.041 0.056 0.056 0.056 0.056 Basic - h 0.013 0.013 0.013 0.020 0.020 0.020 0.020 Reference - 16 20 24 28 Reference - N SO-8 SO16 (0.150”) 8 14 16 Rev. M 2/07 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 12 FN6633.0 May 29, 2009