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INA181 Datasheet(PDF) 1 Page - Texas Instruments |
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INA181 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 62 page  INAx181 Bidirectional, Low- and High-Side Voltage Output, Current-Sense Amplifiers 1 Features • Common-mode range (VCM): –0.2 V to +26 V • High bandwidth: 350 kHz (A1 devices) • Offset voltage: – ±150 µV (maximum) at VCM = 0 V – ±500 µV (maximum) at VCM = 12 V • Output slew rate: 2 V/µs • Bidirectional current-sensing capability • Accuracy: – ±1% gain error (maximum) – 1-µV/°C offset drift (maximum) • Gain options: – 20 V/V (A1 devices) – 50 V/V (A2 devices) – 100 V/V (A3 devices) – 200 V/V (A4 devices) • Quiescent current: 260 µA maximum (INA181) 2 Applications • Motor control • Battery monitors and balancers • Power management • Lighting control • Solar inverters INA4181 (quad-channel) INA2181 (dual-channel) INA181 (single-channel) Power Supply, VS 2.7 V to 5.5 V ADC Microcontroller Bus Voltage, VCM Up To 26 V RSENSE VS Load CBYPASS 0.1 µF GND IN± IN+ OUT REF + ± Copyright © 2017, Texas Instruments Incorporated Typical Application Circuit 3 Description The INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for cost- optimized applications. These devices are part of a family of bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at common- mode voltages from –0.2 V to +26 V, independent of the supply voltage. The INAx181 family integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift. These devices operate from a single 2.7-V to 5.5- V power supply. The single-channel INA181 draws a maximum supply current of 260 µA; whereas, the dual-channel INA2181 draws a maximum supply current of 500 µA, and the quad-channel INA4181 draws a maximum supply current of 900 µA. The INA181 is available in both the 6-pin, SOT-23 and SC70 packages. The INA2181 is available in 10-pin, VSSOP and WSON packages. The INA4181 is available in a 20-pin, TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C. Package Information PART NUMBER PACKAGE(1) PACKAGE SIZE(2) INA181 DBV (SOT-23, 6) 2.90 mm × 2.80 mm DCK (SC70, 6) 2.00 mm × 2.10 mm INA2181 DGS (VSSOP, 10) 3.00 mm × 4.90 mm DSQ (WSON, 10) 2.00 mm × 2.00 mm INA4181 PW (TSSOP, 20) 6.50 mm × 6.40 mm (1) For all available packages, see Section 11. (2) The package size (length × width) is a nominal value and includes pins, where applicable. INA181, INA2181, INA4181 SBOS793H – APRIL 2017 – REVISED NOVEMBER 2023 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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