EL8186 ® Data Sheet August 23, 2005 Micropower Single Supply Rail-to-Rail Input-Output Op Amp The EL8186 is a micropower operational amplifier optimized for single supply operation at 5V and can operate down to 2.4V. The EL8186 draws minimal supply current while meeting excellent DC-accuracy noise and output drive specifications. Competing devices seriously degrade these parameters to achieve micropower supply current. Offset current, voltage and current noise, slew rate, and gain-bandwidth product are all two to ten times better than on previous micropower op amps. The EL8186 can be operated from one lithium cell or two Ni-Cd batteries. The input range includes both positive and negative rail. The output swings to both rails. Ordering Information PART NUMBER (BRAND) FN7455.4 Features • 55µA supply current • 400µV typical offset voltage • 500pA input bias current • 400kHz gain-bandwidth product • 1MHz -3dB bandwidth • 0.13V/µs slew rate • Single supply operation down to 2.4V • Rail-to-rail input and output • Output sources and sinks 26mA load current • Pb-Free plus anneal available (RoHS compliant) Applications • Battery- or solar-powered systems PACKAGE TAPE & REEL PKG. DWG. # EL8186IW-T7 (BBJA) 6-Pin SOT-23 7” (3K pcs) MDP0038 EL8186IW-T7A (BBJA) 6-Pin SOT-23 7” (250 pcs) MDP0038 EL8186IWZ-T7 (BBJA) (Note) 6-Pin SOT-23 (Pb-free) 7” (3K pcs) MDP0038 EL8186IWZ-T7A (BBJA) (Note) 6-Pin SOT-23 (Pb-free) 7” (250 pcs) MDP0038 EL8186ISZ (Note) 8-Pin SO (Pb-free) - MDP0027 EL8186ISZ-T7 (Note) 8-Pin SO (Pb-free) 7” MDP0027 EL8186ISZ-T13 (Note) 8-Pin SO (Pb-free) 13” MDP0027 • 4mA to 25mA current loops • Handheld consumer products • Medical devices • Thermocouple amplifiers • Photodiode pre amps • pH probe amplifiers Pinouts EL8186 (6-PIN SOT-23) TOP VIEW OUT 1 NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are 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. VS- 2 6 VS+ + - IN+ 3 4 IN- EL8186 (8-PIN SO) TOP VIEW NC 1 IN- 2 IN+ 3 VS- 4 1 5 ENABLE 8 ENABLE + 7 VS+ 6 VOUT 5 NC 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. 2004, 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. EL8186 Absolute Maximum Ratings (TA = 25°C) Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . . . . . .Indefinite Ambient Operating Temperature Range . . . . . . . . . .-40°C to +85°C Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to VS + 0.5V CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. 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 VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25°C unless otherwise specified. DESCRIPTION CONDITIONS MIN TYP MAX UNIT 0.4 1 mV VOS Input Offset Voltage ∆V OS --------------∆T Input Offset Drift vs Temperature IOS Input Offset Current 0.4 2 nA IB Input Bias Current 0.5 3 nA eN Input Noise Voltage Density fO = 1kHz 25 nV/√Hz iN Input Noise Current Density fO = 1kHz 0.1 pA/√Hz CMIR Input Voltage Range Guaranteed by CMRR test 0 CMRR Common-Mode Rejection Ratio VCM = 0V to 5V 90 110 dB PSRR Power Supply Rejection Ratio VS = 2.4V to 5V 90 110 dB AVOL Large Signal Voltage Gain VO = 0.5V to 4.5V, RL = 100kΩ 200 500 V/mV VO = 0.5V to 4.5V, RL = 1kΩ 25 V/mV Output low, RL = 100kΩ 3 6 mV 130 200 mV VOUT Maximum Output Voltage Swing 1 Output low, RL = 1kΩ Output high, RL = 100kΩ Output high, RL = 1kΩ µV/°C 5 V 4.994 4.997 V 4.8 4.88 V 0.09 0.13 SR Slew Rate GBW Gain Bandwidth Product fO = 100kHz BW -3dB Bandwidth Unity gain, CLOAD = 27pF, RF = 100 IS,ON Supply Current, Enabled IS,OFF Supply Current, Disabled IO+ Short Circuit Output Current RL = 10Ω 18 31 mA IO- Short Circuit Output Current RL = 10Ω 17 26 mA VS Minimum Supply Voltage VINH Enable Pin High Level VINL Enable Pin Low Level IENH Enable Pin Input Current VEN = 5V 0.25 0.7 2 µA IENL Enable Pin Input Current VEN = 0V -0.5 0 +0.5 µA 2 40 0.17 V/µs 400 kHz 1 MHz 55 75 µA 3 10 µA 2.2 2.4 V 2 V 0.8 V FN7455.4 August 23, 2005 EL8186 Typical Performance Curves 45 6 40 VS=±1.25V 3 35 GAIN (dB) GAIN (dB) 30 0 VS=±2.5V -3 -6 VS=±1.0V AV=1 CL=27pF RF=100Ω RG=OPEN -9 1K 10K 100K 1M FREQUENCY (Hz) 10M VS=±1.0V 10K 100K 1M 50 40 30 20 10 VCM=VDD/2 150 AV=-1 100 50 2.5 3 3.5 4 4.5 5 5.5 VDD=2.5V -50 -100 -150 -200 2 VDD=5V 0 0 1 2 FIGURE 3. SUPPLY CURRENT vs SUPPLY VOLTAGE VOS, µV -40 -60 -80 0 1 2 3 4 5 COMMON-MODE INPUT VOLTAGE (V) FIGURE 5. INPUT OFFSET VOLTAGE vs COMMON-MODE INPUT VOLTAGE 3 4 5 FIGURE 4. INPUT OFFSET VOLTAGE vs OUTPUT VOLTAGE INPUT BIAS, OFFSET CURRENTS (pA) 0 -20 3 OUTPUT VOLTAGE (V) SUPPLY VOLTAGE (V) INPUT OFFSET VOLTAGE (µV) VS=±1.25V 200 INPUT OFFSET VOLTAGE (µV) SUPPLY CURRENT (µA) AV=100 15 RL=10kΩ CL=2.7pF 10 R /R =99.02 F G RF=221kΩ 5 RG=2.23kΩ 0 100 1K FIGURE 2. FREQUENCY RESPONSE vs SUPPLY VOLTAGE 60 -100 VS=±2.5V 20 FREQUENCY (Hz) FIGURE 1. UNITY GAIN FREQUENCY RESPONSE vs SUPPLY VOLTAGE 0 25 10K 1K IB+ 100 IOS IB- 10 1 0 1 2 3 4 5 COMMON-MODE INPUT VOLTAGE (V) FIGURE 6. INPUT BIAS + OFFSET CURRENTS vs COMMONMODE INPUT VOLTAGE FN7455.4 August 23, 2005 EL8186 Typical Performance Curves (Continued) 200 100 150 80 PHASE -100 1K 10K 40 40 0 0 -40 -40 -80 -50 0 100 80 100K -80 -150 1M 1 10 FIGURE 7. AVOL vs FREQUENCY @ 1kΩ LOAD 1M -120 10M 100 PSRR+ 90 90 CMRR (dB) 80 PSRR (dB) 100K 120 110 100 70 60 50 PSRR- 40 80 70 60 50 40 30 30 20 20 10 10 10 100 1K 10K 100K 0 1 1M 10 FREQUENCY (Hz) 100 1K 10K 100K 1M FREQUENCY (Hz) FIGURE 9. PSRR vs FREQUENCY FIGURE 10. CMRR vs FREQUENCY 1K 10.00 CURRENT NOISE (pA/√Hz) VOLTAGE NOISE (nV/√Hz) 10K FIGURE 8. AVOL vs FREQUENCY @ 100kΩ LOAD 120 110 100 10 1 10 1K 100 FREQUENCY (Hz) FREQUENCY (Hz) 0 1 PHASE (°) GAIN (dB) 0 GAIN PHASE (°) GAIN (dB) 50 40 -20 10 80 100 60 20 120 100 1K 10K 100K FREQUENCY (Hz) FIGURE 11. VOLTAGE NOISE vs FREQUENCY 4 1.00 0.10 0.01 1 10 100 1K 10K 100K FREQUENCY (Hz) FIGURE 12. CURRENT NOISE vs FREQUENCY FN7455.4 August 23, 2005 EL8186 Typical Performance Curves (Continued) 500 130 SOT23-6 PACKAGE 10 SAMPLES INPUT OFFSET VOLTAGE (µV) 400 SOT23-6 PACKAGE 125 300 120 PSRR (dB) 200 100 0 -100 115 110 105 -200 100 -300 95 -400 -500 -50 0 50 90 -50 100 0 50 TEMPERATURE (°C) TEMPERATURE (°C) FIGURE 13. VOS vs TEMPERATURE FIGURE 14. PSRR vs TEMPERATURE 120 130 SOT23-6 PACKAGE SOT23-6 PACKAGE 125 OPEN LOOP GAIN (dB) CMRR (dB) 115 110 105 100 95 120 115 110 105 90 -60 -40 -20 0 20 40 60 80 100 -60 100 -40 -20 TEMPERATURE (°C) 20 40 60 80 100 FIGURE 16. AVOL vs TEMPERATURE 70 2000 SOT23-6 PACKAGE 65 SOT23-6 PACKAGE 60 1000 55 500 IS (mA) IB (pA) 0 TEMPERATURE (°C) FIGURE 15. CMRR vs TEMPERATURE 1500 100 0 50 45 -500 40 -1000 -1500 -60 35 30 -40 -20 0 20 40 60 80 TEMPERATURE (°C) FIGURE 17. IB vs TEMPERATURE 5 100 -60 -40 -20 0 20 40 60 TEMPERATURE (°C) 80 100 FIGURE 18. IS vs TEMPERATURE FN7455.4 August 23, 2005 EL8186 Typical Performance Curves JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 0.7 0.4 θJ SO A =2 T2 3 30 0.2 0 0 25 50 °C -6 /W 75 85 100 125 150 AMBIENT TEMPERATURE (°C) FIGURE 19. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE 6 0.5 8 /W SO 0 ° C 6 =1 435mW 0.6 625mW A A 8 /W S O 0° C 1 =1 0.6 JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD θJ POWER DISSIPATION (W) 909mW 0.8 θJ POWER DISSIPATION (W) 1 (Continued) 0.4 391mW θ 0.3 SO T2 36 25 6° C/ W JA = 0.2 0.1 0 0 25 50 75 85 100 125 150 AMBIENT TEMPERATURE (°C) FIGURE 20. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE FN7455.4 August 23, 2005 EL8186 Applications Information Introduction The EL8186 is a rail-to-rail input and output micro-power single supply operational amplifier with an enable feature. The device achieves rail-to-rail input and output operation and eliminates the concerns introduced by a conventional rail-to-rail input and output operational amplifier. Rail-to-Rail Input The input common-mode voltage range of the EL8186 goes from negative supply to positive supply without introducing offset errors or degrading performance associated with a conventional rail-to-rail input operational amplifier. Many railto-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 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 EL8186 achieves input rail-to-rail performance without sacrificing important precision specifications and without degrading distortion performance. The EL8186's input offset voltage exhibits a smooth behavior throughout the entire common-mode input range. The input bias current versus the common-mode voltage range for the EL8186 gives consistent behavior from typically 10mV above the negative rail all the way up to the positive rail. Input Bias Current Compensation The input bias currents of the EL8186 are reduced to a typical 500pA while maintaining excellent bandwidth for a micro-power operational amplifier. Inside the EL8186 is an input bias cancelling circuit. The input stage transistors are still biased with an adequate amount of current for speed but the cancelling circuit sinks most of the base current, leaving a small fraction as input bias current. The input bias current compensation/cancellation operates from typically 10mV above the negative rail to the positive supply rail. 7 Rail-to-Rail Output A pair of complementary MOSFET devices achieves rail-torail output swing. The NMOS sinks current to swing the output in the negative direction. The PMOS sources current to swing the output in the positive direction. The EL8186 with a 100kΩ load will swing to within 3mV of the supply rails. Enable/Disable Feature The EL8186 offers an EN pin. The active low enable pin disables the device when pulled up to at least 2.2V. Upon disable the part consumes typically 3µA, while the output is in a high impedance state. The EN also has an internal pull down. If left open, the EN pin will pull to negative rail and the device will be enabled by default. The high impedance at output during disable allows multiple EL8186s to be connected together as a MUX. The outputs are tied together in parallel and a channel can be selected by the EN pin. Typical Applications R4 100kΩ R3 10kΩ R2 10kΩ K TYPE THERMOCOUPLE V+ + EL8186 V- 410µV/°C + 5V R1 100kΩ FIGURE 21. THERMOCOUPLE AMPLIFIER Thermocouples are the most popular temperature-sensing device because of their low cost, interchangeability, and ability to measure a wide range of temperatures. The EL8186 is used to convert the differential thermocouple voltage into single-ended signal with 10X gain. The EL8186's rail-to-rail input characteristic allows the thermocouple to be biased at ground and the converter to run from a single 5V supply. FN7455.4 August 23, 2005 EL8186 SO Package Outline Drawing 8 FN7455.4 August 23, 2005 EL8186 SOT-23 Package Outline Drawing NOTE: The package drawing shown here may not be the latest version. To check the latest revision, please refer to the Intersil website at http://www.intersil.com/design/packages/index.asp 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 9 FN7455.4 August 23, 2005