ISL28136 Data Sheet January 16, 2014 5MHz, Single Precision Rail-to-Rail Input-Output (RRIO) Op Amp Features • 5MHz Gain bandwidth product @ AV = 100 The ISL28136 is a low-power single operational amplifier optimized for single supply operation from 2.4V to 5.5V, allowing operation from one lithium cell or two Ni-Cd batteries. This device features a gain-bandwidth product of 5MHz and is unity-gain stable with a -3dB bandwidth of 13MHz. This device features an Input Range Enhancement Circuit (IREC), which enables it to maintain CMRR performance for input voltages greater than the positive supply. The input signal is capable of swinging 0.25V above the positive supply and to the negative supply with only a slight degradation of the CMRR performance. The output operation is rail-to-rail. • 13MHz -3dB unity gain bandwidth • 900µA typical supply current • 150µV maximum offset voltage (8 Ld SOIC) • 5nA typical input bias current • Down to 2.4V single supply voltage range • Rail-to-rail input and output • Enable pin • -40°C to +125°C operation • Pb-free (RoHS compliant) The part typically draws less than 1mA supply current while meeting excellent DC accuracy, AC performance, noise and output drive specifications. Operation is guaranteed over -40°C to +125°C temperature range. Applications Ordering Information • Medical devices PART NUMBER (Notes 2, 3) FN6153.6 • Low-end audio • 4mA to 20mA current loops • Sensor amplifiers PART MARKING PACKAGE (Pb-Free) PKG. DWG. # ISL28136FHZ-T7 (Note 1) GABP (Note 4) 6 Ld SOT-23 P6.064A ISL28136FHZ-T7A (Note 1) GABP (Note 4) 6 Ld SOT-23 P6.064A ISL28136FBZ 28136 FBZ 8 Ld SOIC M8.15E ISL28136FBZ-T7 (Note 1) 28136 FBZ 8 Ld SOIC M8.15E ISL28136EVAL1Z Evaluation Board • ADC buffers • DAC output amplifiers Pinouts OUT 1 V- 2 1. Please refer to TB347 for details on reel specifications. 2. 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. ISL28136 (8 LD SOIC) TOP VIEW ISL28136 (6 LD SOT-23) TOP VIEW IN+ 3 + - 6 V+ NC 1 5 EN IN- 2 4 IN- IN+ 3 V- 4 8 EN + 7 V+ 6 OUT 5 NC 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL28136. For more information on MSL please see techbrief TB363. 4. The part marking is located on the bottom of the parts. 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2007-2009, 2011, 2014. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL28136 Absolute Maximum Ratings (TA = +25°C) Thermal Information Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.75V Supply Turn-on Voltage Slew Rate . . . . . . . . . . . . . . . . . . . . . 1V/µs Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . V- - 0.5V to V+ + 0.5V ESD Rating Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kV Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300V Thermal Resistance (Typical) θJA (°C/W) θJC (°C/W) 6 Ld SOT-23 Package (Note 5) 230 N/A 8 Ld SOIC Package (Notes 5, 6) 125 71 Ambient Operating Temperature Range . . . . . . . . .-40°C to +125°C Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . +125°C Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp 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. NOTES: 5. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 6. For θJC, the “case temp” location is taken at the package top center. 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 V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, TA = +25°C unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data established by characterization. PARAMETER DESCRIPTION CONDITIONS MIN (Note 7) TYP -150 ±10 MAX (Note 7) UNIT 150 µV DC SPECIFICATIONS VOS Input Offset Voltage 8 Ld SOIC -270 6 Ld SOT-23 -400 270 ±10 -450 ΔV OS --------------ΔT Input Offset Voltage vs Temperature IOS Input Offset Current 0.4 TA = -40°C to +85°C -10 0 -15 IB Input Bias Current 400 TA = -40°C to +85°C -35 Common-Mode Voltage Range Guaranteed by CMRR 0 CMRR Common-Mode Rejection Ratio VCM = 0V to 5V 90 PSRR Power Supply Rejection Ratio V+ = 2.4V to 5.5V 90 AVOL Large Signal Voltage Gain VO = 0.5V to 4V, RL = 100kΩ to VCM 600 µV/°C 10 15 5 -40 VCM µV 450 35 nA nA 40 5 V 114 dB 99 dB 1770 V/mV 140 V/mV 85 85 500 VO = 0.5V to 4V, RL = 1kΩ to VCM VOUT Maximum Output Voltage Swing Output low, RL = 100kΩ to VCM 3 6 mV 10 Output low, RL = 1kΩ to VCM 70 90 mV 110 Output high, RL = 100kΩ to VCM 4.99 4.994 V 4.94 V 4.98 Output high, RL = 1kΩ to VCM 4.92 4.89 IS,ON Supply Current, Enabled Per Amp 0.8 0.9 1.1 mA 1.4 2 FN6153.6 January 16, 2014 ISL28136 Electrical Specifications V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, TA = +25°C unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data established by characterization. (Continued) PARAMETER IS,OFF DESCRIPTION CONDITIONS MIN (Note 7) Supply Current, Disabled TYP 10 MAX (Note 7) UNIT 14 µA 16 IO+ Short-Circuit Output Source Current RL = 10Ω to VCM 48 56 mA 55 mA 45 IO- Short-Circuit Output Sink Current RL = 10Ω to VCM 50 45 VSUPPLY Supply Operating Range VENH EN Pin High Level V+ to V- 2.4 5.5 2 V V VENL EN Pin Low Level IENH EN Pin Input High Current VEN = V+ 1 IENL EN Pin Input Low Current VEN = V- 16 0.8 V 1.5 µA 1.6 25 nA 30 AC SPECIFICATIONS GBW Gain Bandwidth Product AV = 100, RF = 100kΩ, RG = 1kΩ to VCM 5 MHz Unity Gain Bandwidth -3dB Bandwidth AV = 1, RF = 0Ω, RL = 10kΩ to VCM, VOUT = 10mVP-P 13 MHz eN Input Noise Voltage Peak-to-Peak f = 0.1Hz to 10Hz, RL = 10kΩ to VCM 0.4 µVP-P Input Noise Voltage Density fO = 1kHz, RL = 10kΩ to VCM 15 nV/√Hz iN Input Noise Current Density fO = 10kHz, RL = 10kΩ to VCM 0.35 pA/√Hz CMRR Input Common Mode Rejection Ratio fO = to 120Hz; VCM = 1VP-P, RL = 1kΩ to VCM -90 dB PSRR+ to 120Hz Power Supply Rejection Ratio (V+) V+, V- = ±1.2V and ±2.5V, VSOURCE = 1VP-P, RL = 1kΩ to VCM -88 dB PSRRto 120Hz Power Supply Rejection Ratio (V-) V+, V- = ±1.2V and ±2.5V VSOURCE = 1VP-P, RL = 1kΩ to VCM -105 dB TRANSIENT RESPONSE SR Slew Rate VOUT = ±1.5V; Rf = 50kΩ, RG = 50kΩ to VCM ±1.9 V/µs tr, tf, Large Signal Rise Time, 10% to 90%, VOUT AV = +2, VOUT = 2VP-P, Rg = Rf = RL = 1kΩ to VCM 0.6 µs Fall Time, 90% to 10%, VOUT AV = +2, VOUT = 2VP-P, Rg = Rf = RL = 1kΩ to VCM 0.5 µs Rise Time, 10% to 90%, VOUT AV = +2, VOUT = 10mVP-P, Rg = Rf = RL = 1kΩ to VCM 65 ns Fall Time, 90% to 10%, VOUT AV = +2, VOUT = 10mVP-P, Rg = Rf = RL = 1kΩ to VCM 62 ns Enable to Output Turn-on Delay Time, 10% VEN = 5V to 0V, AV = +2, EN to 10% VOUT Rg = Rf = RL = 1kΩ to VCM 5 µs Enable to Output Turn-off Delay Time, 10% VEN = 0V to 5V, AV = +2, EN to 10% VOUT Rg = Rf = RL = 1kΩ to VCM 0.3 µs tr, tf, Small Signal tEN NOTE: 7. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design. 3 FN6153.6 January 16, 2014 ISL28136 Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open 1 15 Rf = Rg = 100k 5 Rf = Rg = 10k 0 V+ = 5V RL = 1k CL = 16.3pF AV = +2 VOUT = 10mVP-P -5 -10 -15 100 1k Rf = Rg = 1k NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) 0 10 10k 100k 1M FREQUENCY (Hz) 10M VOUT = 50mV -4 VOUT = 10mV -5 -6 -7 V+ = 5V RL = 1k CL = 16.3pF AV = +1 VOUT = 10mVP-P 100k 1M 100M 0 VOUT = 1V -2 VOUT = 100mV -3 VOUT = 50mV -4 VOUT = 10mV V+ = 5V RL = 10k CL = 16.3pF AV = +1 VOUT = 10mVP-P -9 10k 100k -1 VOUT = 1V -2 VOUT = 100mV -3 VOUT = 50mV -4 VOUT = 10mV -5 -6 -7 -8 1M 10M V+ = 5V RL = 100k CL = 16.3pF AV = +1 VOUT = 10mVP-P -9 10k 100M 100k 1M FREQUENCY (Hz) 10M 100M FREQUENCY (Hz) FIGURE 3. GAIN vs FREQUENCY vs VOUT, RL = 10k FIGURE 4. GAIN vs FREQUENCY vs VOUT, RL = 100k 1 70 0 RL = 100k 60 RL = 10k 50 AV = 1001 AV = 1001, Rg = 1k, Rf = 1M -1 -2 RL = 1k -3 GAIN (dB) NORMALIZED GAIN (dB) 10M FIGURE 2. GAIN vs FREQUENCY vs VOUT, RL = 1k NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) -3 1 -1 -8 VOUT = 100mV FREQUENCY (Hz) 0 -7 -2 -9 10k 100M 1 -6 VOUT = 1V -8 FIGURE 1. GAIN vs FREQUENCY vs FEEDBACK RESISTOR VALUES Rf/Rg -5 -1 -4 -5 -6 -7 -8 V+ = 5V CL = 16.3pF AV = +1 VOUT = 10mVP-P -9 10k 100k 40 20 0 10M FREQUENCY (Hz) FIGURE 5. GAIN vs FREQUENCY vs RL 4 100M V+ = 5V CL = 16.3pF RL = 10k VOUT = 10mVP-P 30 AV = 10 AV = 10, Rg = 1k, Rf = 9.09k 10 1M AV = 101, Rg = 1k, Rf = 100k AV = 101 AV = 1 -10 100 AV = 1, Rg = INF, Rf = 0 1k 10k 100k 1M FREQUENCY (Hz) 10M 100M FIGURE 6. FREQUENCY RESPONSE vs CLOSED LOOP GAIN FN6153.6 January 16, 2014 ISL28136 Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open (Continued) 1 V+ = 5V NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) 0 -1 -2 -3 V+ = 2.4V -4 -5 RL = 10k CL = 16.3pF AV = +1 VOUT = 10mVP-P -6 -7 -8 -9 10k 100k 1M 10M 100M 8 7 6 5 4 3 2 1 0 -1 -2 -3 V+ = 5V -4 RL = 1k -5 A = +1 V -6 VOUT = 10mVP-P -7 -8 10k 100k 20 20 0 0 -40 V+ = 2.4V, 5V RL = 1k CL = 16.3pF AV = +1 VCM = 1VP-P 100 1k 10k 100k -40 10M 100M PSRR- PSRR+ -80 -100 -120 10 10M 1M 100 1k 10k 100k 1M 10M FREQUENCY (Hz) FIGURE 9. CMRR vs FREQUENCY; V+ = 2.4V AND 5V FIGURE 10. PSRR vs FREQUENCY, V+, V- = ±1.2V 20 100 V+, V- = ±2.5V 0 RL = 1k CL = 16.3pF -20 AV = +1 VSOURCE = 1VP-P -40 V+ = 5V RL = 1k CL = 16.3pF AV = +1 INPUT VOLTAGE NOISE (nV√Hz) PSRR (dB) 1M -60 FREQUENCY (Hz) PSRR- -60 PSRR+ -80 -100 -120 10 CL = 4.7pF V+, V- = ±1.2V RL = 1k CL = 16.3pF AV = +1 VSOURCE = 1VP-P -20 -20 -100 10 CL = 16.7pF FIGURE 8. GAIN vs FREQUENCY vs CL PSRR (dB) CMRR (dB) FIGURE 7. GAIN vs FREQUENCY vs SUPPLY VOLTAGE -80 CL = 26.7pF FREQUENCY (Hz) FREQUENCY (Hz) -60 CL = 51.7pF CL = 43.7pF CL = 37.7pF 10 100 1k 10k 100k FREQUENCY (Hz) 1M 10M FIGURE 11. PSRR vs FREQUENCY, V+, V- = ±2.5V 5 1 10 100 1k FREQUENCY (Hz) 10k 100k FIGURE 12. INPUT VOLTAGE NOISE DENSITY vs FREQUENCY FN6153.6 January 16, 2014 ISL28136 Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open (Continued) 10 0.5 0.3 1 0.1 0 -0.1 -0.2 -0.4 -0.5 1 10 100 1k FREQUENCY (Hz) 10k 100k 2 3 4 5 6 7 8 9 10 0.026 0.024 SMALL SIGNAL (V) 1.0 0.5 0 V+, V- = ±2.5V RL = 1k CL = 16.3pF Rg = Rf = 10k AV = 2 VOUT = 1.5VP-P -0.5 -1.0 0 1 2 3 4 0.022 0.020 0.018 0.014 5 6 TIME (µs) 7 8 9 0.012 0 10 V-OUT 5 0.5 1.0 1.5 2.0 2.5 TIME (µs) 3.0 3.5 4.0 FIGURE 16. SMALL SIGNAL STEP RESPONSE 1.3 6 V-ENABLE V+, V- = ±2.5V RL = 1k CL = 16.3pF Rg= Rf = 10k AV = 2 VOUT = 10mVP-P 0.016 FIGURE 15. LARGE SIGNAL STEP RESPONSE 100 80 1.1 60 0.9 3 2 1 0.7 0.5 0.3 0.1 0 40 VOS (µV) V+ = 5V Rg = Rf = RL = 1k CL = 16.3pF AV = +2 VOUT = 1VP-P OUTPUT (V) 4 -1 1 FIGURE 14. INPUT VOLTAGE NOISE 0.1Hz TO 10Hz 1.5 -1.5 0 TIME (s) FIGURE 13. INPUT CURRENT NOISE DENSITY vs FREQUENCY LARGE SIGNAL (V) 0.2 -0.3 0.1 V-ENABLE (V) V+ = 5V RL = 10k CL = 16.3pF Rg = 10, Rf = 100k AV = 10000 0.4 INPUT NOISE (µV) INPUT CURRENT NOISE (pA√Hz) V+ = 5V RL = 1k CL = 16.3pF AV = +1 20 0 -20 V+ = 5V RL = OPEN Rf = 100k, Rg = 100 AV = +1000 -40 -60 -80 0 10 20 30 40 50 60 TIME (µs) 70 80 90 FIGURE 17. ENABLE TO OUTPUT RESPONSE 6 -0.1 100 -100 -1 0 1 2 3 VCM (V) 4 5 6 FIGURE 18. INPUT OFFSET VOLTAGE vs COMMON-MODE INPUT VOLTAGE FN6153.6 January 16, 2014 ISL28136 Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open (Continued) 1200 100 N = 1150 80 1100 60 CURRENT (µA) I-BIAS (nA) 40 20 0 -20 V+ = 5V RL = OPEN Rf = 100k, Rg = 100 AV = +1000 -40 -60 -80 -100 -1 0 1 2 3 VCM (V) 4 5 -20 0 20 40 60 MAX 120 100 120 N = 1150 300 MAX 200 VOS (µV) 9 MEDIAN 8 7 6 100 MEDIAN 0 -100 -200 MIN MIN 5 -300 -20 0 20 40 60 80 100 -400 -40 120 -20 0 TEMPERATURE (°C) 300 60 80 400 300 MAX MAX 200 150 VOS (µV) 100 50 40 FIGURE 22. VOS vs TEMPERATURE, V+, V- = ±2.5V, SOT PACKAGE N = 1150 250 200 20 TEMPERATURE (°C) FIGURE 21. SUPPLY CURRENT DISABLED vs TEMPERATURE, V+, V- = ±2.5V VOS (µV) 100 FIGURE 20. SUPPLY CURRENT ENABLED vs TEMPERATURE, V+, V- = ±2.5V 10 MEDIAN 0 100 MEDIAN 0 -50 -100 -100 -200 MIN -150 MIN -200 -250 -40 80 TEMPERATURE (°C) 400 4 -40 MIN 800 600 -40 6 11 CURRENT (µA) MEDIAN 900 700 FIGURE 19. INPUT OFFSET CURRENT vs COMMON-MODE INPUT VOLTAGE N = 1150 MAX 1000 -300 N = 1150 -20 0 20 40 60 80 100 TEMPERATURE (°C) FIGURE 23. VOS vs TEMPERATURE, V+, V- = ±2.5V, SOIC PACKAGE 7 120 -400 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) FIGURE 24. VOS vs TEMPERATURE, V+, V- = ±1.2V, SOT PACKAGE FN6153.6 January 16, 2014 ISL28136 Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open (Continued) 300 30 N = 1150 250 25 MAX 200 MAX 20 100 IBIAS+ (nA) VOS (µV) 150 MEDIAN 50 0 -50 15 MEDIAN 10 5 -100 0 -150 MIN -5 -200 -250 -40 -20 0 20 40 60 80 100 -10 -40 120 MIN -20 0 TEMPERATURE (°C) FIGURE 25. VOS vs TEMPERATURE, V+, V- = ±1.2VSOIC PACKAGE N = 1150 20 40 60 80 TEMPERATURE (°C) 100 120 FIGURE 26. IBIAS+ vs TEMPERATURE, V+, V- = ±2.5V 30 15 25 10 MAX MAX 5 IBIAS+ (nA) IBIAS- (nA) 20 15 10 MEDIAN 5 0 0 MEDIAN -5 -10 -15 MIN -20 -5 MIN N = 1150 -10 -40 -20 0 20 40 60 80 100 120 -25 -40 -20 0 FIGURE 27. IBIAS- vs TEMPERATURE, V+, V- = ±2.5V 60 80 100 120 FIGURE 28. IBIAS+ vs TEMPERATURE, V+, V- = ±1.2V 20 10 N = 1150 15 8 MAX MAX 10 6 5 4 IOS (nA) IBIAS- (nA) N = 1150 40 TEMPERATURE (°C) TEMPERATURE (°C) 0 MEDIAN -5 MEDIAN 2 0 -2 -10 -15 -4 MIN MIN -6 -20 -25 -40 20 N = 1150 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) FIGURE 29. IBIAS- vs TEMPERATURE, V+, V- = ±1.2V 8 -8 -40 -20 0 20 40 60 80 TEMPERATURE (°C) 100 120 FIGURE 30. IOS vs TEMPERATURE, V+, V- = ±2.5V FN6153.6 January 16, 2014 ISL28136 Typical Performance Curves 12 V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open (Continued) 140 N = 1150 10 135 8 125 CMRR (dB) IOS (nA) 6 4 2 MEDIAN 0 -2 120 115 MEDIAN 110 105 -4 100 MIN -6 -8 -40 MAX 130 MAX -20 0 20 40 60 80 TEMPERATURE (°C) MIN 95 100 90 -40 120 N = 1150 -20 0 40 60 80 100 120 TEMPERATURE (°C) FIGURE 31. IOS vs TEMPERATURE, V+, V- = ±1.2V FIGURE 32. CMRR vs TEMPERATURE, VCM = -2.5V TO +2.5V, V+, V- = ±2.5V 120 4500 4000 MAX 115 3500 MAX AVOL (V/mV) 110 PSRR (dB) 20 105 MEDIAN 100 3000 2500 2000 MEDIAN 1500 1000 95 MIN MIN 90 -40 -20 0 20 40 60 80 TEMPERATURE (°C) 500 N = 1150 100 0 -40 120 N = 1150 -20 0 20 40 60 80 FIGURE 33. PSRR vs TEMPERATURE, V+, V- = ±1.2V TO ±2.75V 120 FIGURE 34. AVOL vs TEMPERATURE, V+, V- = ±2.5V, VO = -2V TO +2V, RL = 100k 200 4.960 180 4.955 N = 1150 MAX MAX 160 4.950 MEDIAN VOUT (V) AVOL (V/mV) 100 TEMPERATURE (°C) 140 120 MEDIAN 4.945 4.940 100 MIN MIN 4.935 80 N = 1150 60 -40 -20 0 20 40 60 80 TEMPERATURE (°C) 100 120 FIGURE 35. AVOL vs TEMPERATURE, V+, V- = ±2.5V, VO = -2V TO +2V, RL = 1k 9 4.930 -40 -20 0 20 40 60 80 TEMPERATURE (°C) 100 120 FIGURE 36. VOUT HIGH vs TEMPERATURE, V+, V- = ±2.5V, RL = 1k FN6153.6 January 16, 2014 ISL28136 Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open (Continued) 75 70 VOUT (m V) MAX 65 60 MEDIAN 55 MIN 50 N = 1150 45 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) FIGURE 37. VOUT LOW vs TEMPERATURE, V+, V- = ±2.5V, RL = 1k Pin Descriptions ISL28136 (6 Ld SOT-23) 4 ISL28136 (8 Ld SOIC) PIN NAME 1, 5 NC Not connected 2 IN- inverting input FUNCTION EQUIVALENT CIRCUIT V+ IN- IN+ VCircuit 1 3 3 IN+ 2 4 V- Non-inverting input Negative supply See Circuit 1 V+ CAPACITIVELY COUPLED ESD CLAMP VCircuit 2 1 6 OUT Output V+ OUT VCircuit 3 6 7 V+ Positive supply 5 8 EN Chip enable See Circuit 2 V+ LOGIC PIN VCircuit 3 10 FN6153.6 January 16, 2014 ISL28136 Applications Information - Introduction The ISL28136 is a single channel Bi-CMOS rail-to-rail input, output (RRIO) micropower precision operational amplifier. The part is designed to operate from a single supply 2.4V to 5.5V. The part has an input common mode range that extends 0.25V above the positive rail and down to the negative supply rail. The output operation can swing within about 3mV of the supply rails with a 100kΩ load. Rail-to-Rail Input Many rail-to-rail input stages use two differential input pairs; a long-tail PNP (or PFET) and an NPN (or NFET). Severe penalties have to be paid for this circuit topology. As the input signal moves from one supply rail to another, the operational amplifier switches from one input pair to the other causing drastic changes in input offset voltage and an undesired change in magnitude and polarity of input offset current. The ISL28136 achieves input rail-to-rail operation without sacrificing important precision specifications and degrading distortion performance. The device’s input offset voltage exhibits a smooth behavior throughout the entire commonmode input range. The input bias current versus the common-mode voltage range gives an undistorted behavior from typically down to the negative rail to 0.25V higher than the positive rail. Rail-to-Rail Output The output stage uses drain-connected N and P-channel MOSFETs to achieve rail-to-rail output swing. The P-channel device sources current to swing the output in the positive direction and the N-channel sinks current to swing the output in the negative direction. The ISL28136 with a 100kΩ load will swing to within 3mV of the positive supply rail and within 3mV of the negative supply rail. Results of Over-Driving the Output Caution should be used when over-driving the output for long periods of time. Over-driving the output can occur in two ways. 1) The input voltage times the gain of the amplifier exceeds the supply voltage by a large value or, 2) the output current required is higher than the output stage can deliver. These conditions can result in a shift in the Input Offset Voltage (VOS) as much as 1µV/hr. of exposure under these conditions. IN+ and IN- Input Protection All input terminals have internal ESD protection diodes to both positive and negative supply rails, limiting the input voltage to within one diode beyond the supply rails. They also contain back-to-back diodes across the input terminals (see “Pin Descriptions” on page 10 - Circuit 1). For applications where the input differential voltage is expected to exceed 0.5V, an external series resistor must be used to ensure the input currents never exceed 5mA (Figure 38). 11 VIN VOUT RIN + RL FIGURE 38. INPUT CURRENT LIMITING Enable/Disable Feature The ISL28136 offers an EN pin that disables the device when pulled up to at least 2.0V. In the disabled state (output in a high impedance state), the part consumes typically 10µA at room temperature. By disabling the part, multiple ISL28136 parts can be connected together as a MUX. In this configuration, the outputs are tied together in parallel and a channel can be selected by the EN pin. The loading effects of the feedback resistors of the disabled amplifier must be considered when multiple amplifier outputs are connected together. Note that feed through from the IN+ to IN- pins occurs on any Mux Amp disabled channel where the input differential voltage exceeds 0.5V (e.g., active channel VOUT = 1V, while disabled channel VIN = GND), so the mux implementation is best suited for small signal applications. If large signals are required, use series IN+ resistors, or a large value RF, to keep the feed through current low enough to minimize the impact on the active channel. See“Limitations of the Differential Input Protection” on page 11 for more details. To disable the part, the user needs to supply the 1.5µA required to pull the EN pin to the V+ rail. If left open, the EN pin will pull to the negative rail and the device will be enabled by default. If the EN function is not required (no need to turn the part off), as a precaution, it is recommended that the user tie the EN pin to the V- pin. Limitations of the Differential Input Protection If the input differential voltage is expected to exceed 0.5V, an external current limiting resistor must be used to ensure the input current never exceeds 5mA. For non-inverting unity gain applications, the current limiting can be via a series IN+ resistor, or via a feedback resistor of appropriate value. For other gain configurations, the series IN+ resistor is the best choice, unless the feedback (RF) and gain setting (RG) resistors are both sufficiently large to limit the input current to 5mA. Large differential input voltages can arise from several sources: 1. During open loop (comparator) operation. Used this way, the IN+ and IN- voltages don’t track, so differentials arise. 2. When the amplifier is disabled but an input signal is still present. An RL or RG to GND keeps the IN- at GND, while the varying IN+ signal creates a differential voltage. Mux Amp applications are similar, except that the active channel VOUT determines the voltage on the IN- terminal. FN6153.6 January 16, 2014 ISL28136 3. When the slew rate of the input pulse is considerably faster than the op amp’s slew rate. If the VOUT can’t keep up with the IN+ signal, a differential voltage results, and visible distortion occurs on the input and output signals. To avoid this issue, keep the input slew rate below 1.9V/µs, or use appropriate current limiting resistors. Large (>2V) differential input voltages can also cause an increase in disabled ICC. Current Limiting 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 = 2*V S × I SMAX + ( V S - V OUTMAX ) × ---------------------------RL (EQ. 2) where: These devices have no internal current-limiting circuitry. If the output is shorted, it is possible to exceed the Absolute Maximum Rating for output current or power dissipation, potentially resulting in the destruction of the device. • θJA = Thermal resistance of the package Power Dissipation • PDMAX = Maximum power dissipation of 1 amplifier It is possible to exceed the +125°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 in Equation 1: T JMAX = T MAX + ( θ JA xPD MAXTOTAL ) • TMAX = Maximum ambient temperature • VS = Supply voltage (Magnitude of V+ and V-) • IMAX = Maximum supply current of 1 amplifier • VOUTMAX = Maximum output voltage swing of the application • RL = Load resistance (EQ. 1) All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9001 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 12 FN6153.6 January 16, 2014 ISL28136 Package Outline Drawing M8.15E 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE Rev 0, 08/09 4 4.90 ± 0.10 A DETAIL "A" 0.22 ± 0.03 B 6.0 ± 0.20 3.90 ± 0.10 4 PIN NO.1 ID MARK 5 (0.35) x 45° 4° ± 4° 0.43 ± 0.076 1.27 0.25 M C A B SIDE VIEW “B” TOP VIEW 1.75 MAX 1.45 ± 0.1 0.25 GAUGE PLANE C SEATING PLANE 0.10 C 0.175 ± 0.075 SIDE VIEW “A 0.63 ±0.23 DETAIL "A" (0.60) (1.27) NOTES: (1.50) (5.40) 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal ± 0.05 4. Dimension does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25mm per side. 5. The pin #1 identifier may be either a mold or mark feature. 6. Reference to JEDEC MS-012. TYPICAL RECOMMENDED LAND PATTERN 13 FN6153.6 January 16, 2014 ISL28136 Package Outline Drawing P6.064A 6 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE Rev 0, 2/10 1.90 0-3° 0.95 D 0.08-0.20 A 5 6 4 PIN 1 INDEX AREA 2.80 3 1.60 3 0.15 C D 2x 5 (0.60) 1 3 2 0.20 C 2x 0.40 ±0.05 B SEE DETAIL X 3 0.20 M C A-B D TOP VIEW 2.90 5 END VIEW 10° TYP (2 PLCS) 0.15 C A-B 2x H 1.14 ±0.15 1.45 MAX C SIDE VIEW 0.10 C 0.05-0.15 SEATING PLANE DETAIL "X" (0.25) GAUGE PLANE 0.45±0.1 4 (0.60) (1.20) NOTES: (2.40) (0.95) 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to ASME Y14.5M-1994. 3. Dimension is exclusive of mold flash, protrusions or gate burrs. 4. Foot length is measured at reference to guage plane. 5. This dimension is measured at Datum “H”. 6. Package conforms to JEDEC MO-178AA. (1.90) TYPICAL RECOMMENDED LAND PATTERN 14 FN6153.6 January 16, 2014