INA159-EP www.ti.com .......................................................................................................................................................................................... SBOS443 – NOVEMBER 2008 PRECISION, GAIN OF 0.2 LEVEL TRANSLATION DIFFERENCE AMPLIFIER FEATURES 1 • Gain of 0.2 to Interface ±10-V Signals to Single-Supply ADCs • Gain Accuracy: ±0.024% (max) • Wide Bandwidth: 1.5 MHz • High Slew Rate: 15 V/µs • Low Offset Voltage: ±100 µV • Low Offset Drift: ±1.5 µV/°C • Single-Supply Operation Down to 1.8 V 2 APPLICATIONS • • • • Industrial Process Controls Instrumentation Differential to Single-Ended Conversion Audio Line Receivers SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS • • • • • • • (1) Controlled Baseline One Assembly/Test Site One Fabrication Site Available in Military (–55°C/125°C) Temperature Range (1) Extended Product Life Cycle Extended Product-Change Notification Product Traceability DESCRIPTION The INA159 is a high slew rate, G = 1/5 difference amplifier consisting of a precision op amp with a precision resistor network. The gain of 1/5 makes the INA159 useful to couple ±10-V signals to single-supply analog-to-digital converters (ADCs), particularly those operating on a single +5-V supply. The on-chip resistors are laser-trimmed for accurate gain and high common-mode rejection. Excellent temperature coefficient of resistance (TCR) tracking of the resistors maintains gain accuracy and common-mode rejection over temperature. The input common-mode voltage range extends beyond the positive and negative supply rails. It operates on a total of 1.8-V to 5.5-V single or split supplies. The INA159 reference input uses two resistors for easy mid-supply or reference biasing. The difference amplifier is the foundation of many commonly-used circuits. The INA159 provides this circuit function without using an expensive external precision resistor network. The INA159 is available in an MSOP-8 surface-mount package and is specified for operation over the extended industrial temperature range, –55°C to 125°C. Additional temperature ranges are available - contact factory 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2008, Texas Instruments Incorporated INA159-EP SBOS443 – NOVEMBER 2008 .......................................................................................................................................................................................... www.ti.com VREF 5V V+ −IN 100kΩ 20kΩ SENSE REF R1 100Ω DOUT +IN C1 1000pF VIN +IN 100kΩ 40kΩ V+ ADS8325 ADC −IN CS REF 2 40kΩ DCLOCK GND REF 1 INA159 Figure 1. Typical Application This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. ORDERING INFORMATION (1) (1) (2) TEMPERATURE ORDERABLE PART NUMBER (2) PACKAGE LEAD PACKAGE DESIGNATOR TOP-SIDE MARKING -55°C to 125°C INA159AMDGKTEP MSOP-8 Tape and reel DGK OAA For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. TOP VIEW MSOP INA159 2 REF 1 1 8 REF 2 −IN 2 7 V+ +IN 3 6 OUT V− 4 5 SENSE Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP INA159-EP www.ti.com .......................................................................................................................................................................................... SBOS443 – NOVEMBER 2008 ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) MIN Supply voltage Signal input terminals (−IN and +IN), voltage Reference (REF 1 and REF2) and sense pins Current Voltage (V–) – 0.5 Output short circuit UNIT +5.5 V ±30 V ±10 mA (V+) + 0.5 V Continuous Operating temperature –55 +125 °C Storage temperature –65 +150 °C +150 °C Human-Body Model 4000 V Charged-Device Model 1000 V Junction temperature ESD rating (1) MAX Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not supported. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP 3 INA159-EP SBOS443 – NOVEMBER 2008 .......................................................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS Boldface limits apply over the specified temperature range, TA = –55°C to +125°C. At TA = +25°C, RL = 10 kΩ connected to VS/2, REF pin 1 connected to ground, and REF pin 2 connected to VREF = 5 V, unless otherwise noted. PARAMETER CONDITIONS OFFSET VOLTAGE (1) INA159 MIN TYP MAX ±100 ±500 RTO Initial (1) VOS VS = ±2.5 V, Reference and Input Pins Grounded Over Temperature vs Power Supply PSRR VS = ±0.9 V to ±2.75 V Over Temperature (2) over Temperature µV ±1450 µV ±100 µV/V ±200 µV/V ±20 PSRR VS = ±0.9 V to ±2.75 V Reference Divider Accuracy INPUT IMPEDANCE UNIT ±0.002 ±0.024 % ±0.002 ±0.050 % (3) Differential Common-Mode INPUT VOLTAGE RANGE 240 kΩ 60 kΩ RTI Common-Mode Voltage Range VCM Positive 17.5 Negative –12.5 V 80 96 dB 74 94 dB 10 µVPP 30 nV/√Hz Common-Mode Rejection Ratio CMRR VCM = –10 V to +10 V, RS = 0 Ω over Temperature OUTPUT VOLTAGE NOISE (4) V RTO f = 0.1 Hz to 10 Hz f = 10 kHz VREF2 = 4.096 V, RL Connected to GND, (VIN+) – (VIN–) = –10 V to +10 V, VCM = 0 V GAIN Initial G 0.2 Error ±0.005 vs Temperature V/V ±0.024 ±0.035 Nonlinearity ±0.0002 % % % of FS OUTPUT VREF2 = 4.096 V, RL Connected to GND Voltage, Positive over Temperature (V+) – 0.02 (V+) – 0.2 VREF2 = 4.096 V, RL Connected to GND Voltage, Negative over Temperature (V–) + 0.048 See Typical Characteristic RO f = 1 MHz, IO = 0 V V ±60 Capacitive Load V V (V–) + 0.01 (V–) + 0.070 Current Limit, Continuous to Common Open-Loop Output Impedance (V+) – 0.1 mA pF 110 Ω 1.5 MHz 15 V/µs 1 µs FREQUENCY RESPONSE Small-Signal Bandwidth Slew Rate Settling Time, 0.01% (1) (2) (3) (4) 4 –3 dB SR tS 4 V Output Step, CL = 100 pF Includes effects of amplifier input bias and offset currents. Reference divider accuracy specifies the match between the reference divider resistors using the configuration in Figure 2. Internal resistors are ratio matched but have 20% absolute value. Includes effects of amplifier input current noise and thermal noise contribution of resistor network. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP INA159-EP www.ti.com .......................................................................................................................................................................................... SBOS443 – NOVEMBER 2008 ELECTRICAL CHARACTERISTICS (continued) Boldface limits apply over the specified temperature range, TA = –55°C to +125°C. At TA = +25°C, RL = 10 kΩ connected to VS/2, REF pin 1 connected to ground, and REF pin 2 connected to VREF = 5 V, unless otherwise noted. PARAMETER INA159 CONDITIONS Overload Recovery Time MIN 50% Overdrive TYP MAX 250 UNIT ns POWER SUPPLY Specified Voltage Range VS Operating Voltage Range +1.8 Quiescent Current IQ IO = 0 mA, VS = ±2.5 V, Reference and Input Pins Grounded 1.1 over Temperature +5 V +5.5 V 1.5 mA 2.0 mA TEMPERATURE RANGE Specified Range –55 +125 °C Operating Range –55 +125 °C Storage Range –65 +150 °C θJA Thermal Resistance MSOP-8 Surface Mount 150 °C/W +5V V+ 2 7 100kΩ 20kΩ 5 6 3 40kΩ 100kΩ 40kΩ INA159 V− 1 8 OUT The test is performed by measuring the output with the reference applied to alternate reference resistors, and calculating a result such that the amplifier offset is cancelled in the final measurement. 4 Figure 2. Test Circuit for Reference Divider Accuracy Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP 5 INA159-EP SBOS443 – NOVEMBER 2008 .......................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS At TA = +25°C, RL = 10 kΩ connected to VS/2, REF pin 1 connected to ground, and REF pin 2 connected to VREF = 5 V, unless otherwise noted. OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION −500 −450 −400 −350 −300 −250 −200 −150 −100 −50 0 50 100 150 200 250 300 350 400 450 500 −10 −9 −8 −7 −6 −5 −4 −3 −2 −1 0 1 2 3 4 5 6 7 8 9 10 Population Population OFFSET VOLTAGE PRODUCTION DISTRIBUTION Offset Voltage Drift (µV/_C) Offset Voltage (µV) GAIN vs FREQUENCY POWER−SUPPLY REJECTION RATIO vs FREQUENCY 0 PSRR (dB) Gain (dB) −10 −20 −30 −40 −50 10 100 1k 10k 100k 1M 130 120 110 100 90 80 70 60 50 40 30 20 10 0 −10 10 10M 100 1k 10k 100k 1M 10M Frequency (Hz) Frequency (Hz) COMMON−MODE REJECTION RATIO vs FREQUENCY QUIESCENT CURRENT vs TEMPERATURE 120 1.20 110 VS = 5.5V 1.15 100 1.10 80 IQ (mA) CMRR (dB) 90 70 60 VS = 5V 1.05 1.00 0.95 VS = 1.8V 50 0.90 40 0.85 30 0.80 20 10 100 1k 10k 100k 1M 10M −50 Frequency (Hz) 6 −25 0 25 50 75 100 125 Temperature (_C) Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP INA159-EP www.ti.com .......................................................................................................................................................................................... SBOS443 – NOVEMBER 2008 TYPICAL CHARACTERISTICS (continued) At TA = +25°C, RL = 10 kΩ connected to VS/2, REF pin 1 connected to ground, and REF pin 2 connected to VREF = 5 V, unless otherwise noted. SHORT−CIRCUIT CURRENT vs TEMPERATURE 120 OUTPUT VOLTAGE SWING vs OUTPUT CURRENT 3.0 VS = ±2.75V 100 2.5 2.0 80 ISC (mA) Output Swing (V) VS = ±2.5V 60 40 20 VS = ±0.9V 0 −20 VS = ±2.5V −40 1.5 TA = −40_C 1.0 0.5 TA = −40_C TA = +25_C TA = +125_ C 0 −0.5 TA = +125_C −1.0 −1.5 −60 −2.0 −80 −100 −50 −25 0 25 50 VS = ±0.9V −2.5 VS = ±2.75V VS = ±2.5V −3.0 75 100 0 125 10 20 30 40 50 60 70 80 Temperature (_C) Output Current (mA) TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY OUTPUT VOLTAGE NOISE SPECTRAL DENSITY vs FREQUENCY 90 1000 Output Voltage Noise (nV/√Hz) THD+Noise (%) 0.01 0.25VPP 2kΩ 4VPP 100 600Ω 10 0.001 10 100 1k 10k 1 100k 10 100 1k 10k 100k Frequency (Hz) Frequency (Hz) 0.1Hz TO 10Hz NOISE SMALL−SIGNAL OVERSHOOT vs LOAD CAPACITANCE 60 5µV/div Overshoot (%) 50 40 30 VS = 5V 20 10 0 Time (1s/div) 100 1000 3000 Load Capacitance (pF) Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP 7 INA159-EP SBOS443 – NOVEMBER 2008 .......................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) At TA = +25°C, RL = 10 kΩ connected to VS/2, REF pin 1 connected to ground, and REF pin 2 connected to VREF = 5 V, unless otherwise noted. SMALL−SIGNAL STEP RESPONSE 1V/div 200mV/div LARGE−SIGNAL STEP RESPONSE Time (500ns/div) Time (500ns/div) SETTLING TIME 2mV/div VOUT = 4V Step CL = 100pF Time (250ns/div) 8 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP INA159-EP www.ti.com .......................................................................................................................................................................................... SBOS443 – NOVEMBER 2008 APPLICATION INFORMATION The internal op amp of the INA159 has a rail-to-rail common-mode voltage capability at its inputs. A rail-to-rail op amp allows the use of ±10-V inputs into a circuit biased to 1/2 of a 5-V reference (2.5-V quiescent output). The inputs to the op amp will swing from approximately 400 mV to 3.75 V in this application. The unique input topology of the INA159 eliminates the input offset transition region typical of most rail-to-rail complementary stage operational amplifiers. This allows the INA159 to provide superior glitch- and transition-free performance over the entire common-mode range. Good layout practice includes the use of a 0.1-µF bypass capacitor placed closely across the supply pins. COMMON-MODE RANGE The common-mode range of the INA159 is a function of supply voltage and reference. Where both pins, REF1 and REF2, are connected together: V CM) + (V)) ) 5[(V)) * VREF] (1) V CM* + (V*) * 5[V REF * (V*)] V CM) + (V)) ) 5[(V)) * (0.5VREF)] (3) V CM* + (V*) * 5[(0.5V REF) * (V*)] (4) Some typical values are shown in Table 1. Table 1. Common-Mode Range For Various Supply and Reference Voltages REF 1 and REF 2 Connected Together V+ V− VREF VCM+ VCM− 5 0 3 15 –15 5 0 2.5 17.5 –12.5 5 0 1.25 23.75 –6.25 1/2 Reference Connection V+ V− VREF VCM+ VCM− 5 0 5 17.5 –12.5 5 0 4.096 19.76 –10.24 5 0 2.5 23.75 –6.25 3.3 0 3.3 11.55 –8.25 3.3 0 2.5 13.55 –6.25 3.3 0 1.25 16.675 –3.125 (2) Where one REF pin is connected to the reference, and the other pin grounded (1/2 reference connection): Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP 9 INA159-EP SBOS443 – NOVEMBER 2008 .......................................................................................................................................................................................... www.ti.com Input and Output Relationships for Various Reference and Connection Combinations VREF (V) REF CONNECTION VOUT for VIN = 0 (V) LINEAR VIN RANGE (V) USEFUL VOUT SWING (V) 2.5 +10 0 –10 4.5 (±2V swing) 0.5 2.048 10 0 –10 4.048 (±2V swing) 0.048 1.65 +10 0 –7.885 3.65 (–1.577V, +2V swing) 0.048 1.25 +10 (also +5) 0 –6 (also –5) 3.25 (–1.2V, +2V swing) 0.048 0.9 +10 0 –4.26 2.9 (–0.852V, +2V swing) 0.048 2.5 +10 0 –10 4.5 (＝2V swing) 0.5 1.8 +10 0 –8.76 3.8 (–1.752V, +2V swing) 0.048 1.2 +10 0 –5.76 3.2 (–1.15V, +2V swing) 0.048 5V 5 V+ −IN 100kΩ 20kΩ SENSE 4.096 OUT 3.3 2.5 VIN +IN 100kΩ 40kΩ 40kΩ REF 2 VREF REF 1 INA159 1.8 5V 2.5 V+ − IN 100kΩ 20kΩ SENSE 1.8 OUT 1.2 VIN +IN 100kΩ 40kΩ 40kΩ REF 2 V REF REF 1 INA159 10 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP INA159-EP www.ti.com .......................................................................................................................................................................................... SBOS443 – NOVEMBER 2008 VREF 5V V+ −IN 100kΩ 20kΩ SENSE REF R1 100Ω DOUT +IN C1 1000pF VIN +IN 100kΩ 40kΩ 40kΩ V+ −IN ADS8325 ADC DCLOCK CS REF 2 GND REF 1 INA159 Figure 3. Typical Application Circuit Interfacing to Medium-Speed, Single-Supply ADCs VREF 5V V+ −IN 100kΩ 20kΩ SENSE REF R1 100Ω DOUT +IN 100kΩ 40kΩ 40kΩ ADS8361 or ADS7861 ADC −IN +IN C1 1000pF VIN V+ REF 2 DCLOCK CS GND REF 1 INA159 Figure 4. Typical Application Circuit Interfacing to Medium-Speed, Single-Supply ADCs with Pseudo-Differential Inputs (such as the ADS7861 and ADS8361) Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP 11 INA159-EP SBOS443 – NOVEMBER 2008 .......................................................................................................................................................................................... www.ti.com VREF 5V V+ −IN 100kΩ 20kΩ SENSE VIN +IN V+ REF R1 100Ω 100kΩ 40kΩ 40kΩ +IN C1 1000pF ADC −IN REF 2 GND REF 1 INA159 a) Unipolar, Noninverting, G = 0.2 VREF 5V V+ −IN 100kΩ 20kΩ SENSE REF R1 100Ω VIN +IN 100kΩ 40kΩ 40kΩ +IN C1 1000pF V+ ADC −IN REF 2 GND REF 1 INA159 b) Bipolar, Noninverting, G = 0.2 VREF 5V V+ −IN 100kΩ 20kΩ SENSE REF R1 100Ω +IN 100kΩ 40kΩ 40kΩ +IN C1 1000pF REF 2 V+ ADC −IN GND REF 1 INA159 VIN c) Unipolar, Unity Gain Figure 5. Basic INA159 Configurations 12 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP INA159-EP www.ti.com .......................................................................................................................................................................................... SBOS443 – NOVEMBER 2008 5V V+ VIN− −IN A 100kΩ 20kΩ SENSE A OUT A 100Ω 1000pF VIN+ +IN A 100kΩ 40kΩ 40kΩ REF 2A REF 1A INA159 VREF V+ −IN B 100kΩ 20kΩ REF SENSE B OUT B V+ +IN 100Ω −IN 5V ADC 1000pF GND +IN B 100kΩ 40kΩ 40kΩ REF 2B REF 1B INA159 Figure 6. Differential ADC Drive Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): INA159-EP 13 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2008 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty INA159AMDGKTEP ACTIVE MSOP DGK 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM V62/09613-01XE ACTIVE MSOP DGK 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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OTHER QUALIFIED VERSIONS OF INA159-EP : • Catalog: INA159 NOTE: Qualified Version Definitions: • Catalog - TI's standard catalog product Addendum-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 10-Dec-2008 TAPE AND REEL INFORMATION *All dimensions are nominal Device INA159AMDGKTEP Package Package Pins Type Drawing MSOP DGK 8 SPQ 250 Reel Reel Diameter Width (mm) W1 (mm) 180.0 12.4 Pack Materials-Page 1 A0 (mm) B0 (mm) K0 (mm) P1 (mm) 5.3 3.4 1.4 8.0 W Pin1 (mm) Quadrant 12.0 Q1 PACKAGE MATERIALS INFORMATION www.ti.com 10-Dec-2008 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) INA159AMDGKTEP MSOP DGK 8 250 190.5 212.7 31.8 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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