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Current sense amplifiers analog output

INA293-Q1

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AEC-Q100, -4-V to 110-V, 1.3-MHz, ultra-precise current sense amplifier

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Data sheet

INA293-Q1

ACTIVE
Data sheet Order now

Product details

Common mode voltage (Max) (V) 110 Common mode voltage (Min) (V) -4 Input offset (+/-) (Max) (uV) 20 Input offset drift (+/-) (Typ) (uV/C) 0.025 Gain (V/V) 100, 20, 200, 50, 500 Gain error (%) 0.15 Gain error drift (+/-) (Max) (ppm/°C) 10 CMRR (Min) (dB) 140 Bandwidth (kHz) 1300 Supply voltage (Max) (V) 20 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 2.25 Number of channels (#) 1 Comparators (#) 0 Features Low-side Capable, Ultra precise Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125
Common mode voltage (Max) (V) 110 Common mode voltage (Min) (V) -4 Input offset (+/-) (Max) (uV) 20 Input offset drift (+/-) (Typ) (uV/C) 0.025 Gain (V/V) 100, 20, 200, 50, 500 Gain error (%) 0.15 Gain error drift (+/-) (Max) (ppm/°C) 10 CMRR (Min) (dB) 140 Bandwidth (kHz) 1300 Supply voltage (Max) (V) 20 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 2.25 Number of channels (#) 1 Comparators (#) 0 Features Low-side Capable, Ultra precise Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125
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SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
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  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40 °C to +125 °C, TA
  • Functional Safety-Capable
  • Wide common-mode voltage:
    • Operational voltage: −4 V to +110 V
    • Survival voltage: −20 V to +120 V
  • Excellent CMRR:
    • 160-dB DC-CMRR
    • 85-dB AC-CMRR at 50 kHz
  • Accuracy:
    • Gain:
      • Gain error: ±0.15% (maximum)
      • Gain drift: ±10 ppm/ °C (maximum)
    • Offset:
      • Offset voltage: ±15 µV (typical)
      • Offset drift: ±0.05 µV/ °C (typical)
  • Available gains:
    • INA293A1-Q1, INA293B1-Q1 : 20 V/V
    • INA293A2-Q1, INA293B2-Q1 : 50 V/V
    • INA293A3-Q1, INA293B3-Q1 : 100 V/V
    • INA293A4-Q1, INA293B4-Q1 : 200 V/V
    • INA293A5-Q1, INA293B5-Q1 : 500 V/V
  • High bandwidth: 1.3 MHz
  • Slew rate: 2.5 V/µs
  • Quiescent current: 1.5 mA
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40 °C to +125 °C, TA
  • Functional Safety-Capable
  • Wide common-mode voltage:
    • Operational voltage: −4 V to +110 V
    • Survival voltage: −20 V to +120 V
  • Excellent CMRR:
    • 160-dB DC-CMRR
    • 85-dB AC-CMRR at 50 kHz
  • Accuracy:
    • Gain:
      • Gain error: ±0.15% (maximum)
      • Gain drift: ±10 ppm/ °C (maximum)
    • Offset:
      • Offset voltage: ±15 µV (typical)
      • Offset drift: ±0.05 µV/ °C (typical)
  • Available gains:
    • INA293A1-Q1, INA293B1-Q1 : 20 V/V
    • INA293A2-Q1, INA293B2-Q1 : 50 V/V
    • INA293A3-Q1, INA293B3-Q1 : 100 V/V
    • INA293A4-Q1, INA293B4-Q1 : 200 V/V
    • INA293A5-Q1, INA293B5-Q1 : 500 V/V
  • High bandwidth: 1.3 MHz
  • Slew rate: 2.5 V/µs
  • Quiescent current: 1.5 mA
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The INA293-Q1 is a ultra-precise current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –4 V to 110 V. The negative common-mode voltage allows the device to operate below ground, thus accommodating precise measurement of recirculating currents in half-bridge applications. The combination of a low offset voltage, small gain error and high DC CMRR enables highly accurate current measurement. The INA293-Q1 is not only designed for DC current measurement, but also for high-speed applications (ex. Fast over-current protection) with a high bandwidth of 1.3 MHz and an 85-dB AC CMRR (at 50 kHz).

The INA293-Q1 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA293-Q1 is available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain options address wide dynamic range current-sensing applications.

The INA293-Q1 is specified over an operating temperature range of −40 °C to +125 °C and is offered in a space-saving SOT-23 package with two pin-out variants.

The INA293-Q1 is a ultra-precise current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –4 V to 110 V. The negative common-mode voltage allows the device to operate below ground, thus accommodating precise measurement of recirculating currents in half-bridge applications. The combination of a low offset voltage, small gain error and high DC CMRR enables highly accurate current measurement. The INA293-Q1 is not only designed for DC current measurement, but also for high-speed applications (ex. Fast over-current protection) with a high bandwidth of 1.3 MHz and an 85-dB AC CMRR (at 50 kHz).

The INA293-Q1 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA293-Q1 is available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain options address wide dynamic range current-sensing applications.

The INA293-Q1 is specified over an operating temperature range of −40 °C to +125 °C and is offered in a space-saving SOT-23 package with two pin-out variants.

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Technical documentation

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Type Title Date
* Data sheet INA293-Q1, AEC-Q100, –4-V to 110-V, 1.3-MHz, Ultra-Precise Current Sense Amplifier datasheet (Rev. B) 10 May 2021
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor 25 Jan 2022
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application 14 Jun 2021
Application note High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) 23 Feb 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 2021
Application note Current Sensing in an H-Bridge (Rev. B) 05 Feb 2021
Application note High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. C) 04 Dec 2020
Functional safety information INA293-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) 05 Nov 2020
Application note Difference Between an Instrumentation Amplifier and a Current Sense Amplifier 03 Apr 2020
Application note Evaluating Current Sensing Amplifiers in Body Control Modules Using Simulation 16 Dec 2019
User guide INA293EVM User's Guide (Rev. A) 12 Dec 2019
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018
Application note Benefits of Intergated Low Inductive Shunt for PWM Applications 17 Jun 2017
Technical article System trade-offs for high- and low-side current measurements 01 Jun 2017
Application note Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers 28 Feb 2017
Analog design journal Low-cost current-shunt monitor IC revives moving-coil meter design 18 Apr 2006

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

INA293EVM — INA293 -4-V to 110-V, 1.3-MHz, high-precision current sense amplifier evaluation module

This is a small module with 10 completely independent boards that can be broken off by the user. Ten schematically identical boards for each of the five gain variation and two pinout variations of the INA293 with inputs up to 110V common mode and 5A (on board shunt) input capability. Each board (...)

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Simulation model

INA293 TINA-TI SPICE MODEL (Rev. A)

SBOMAZ2A.ZIP (43 KB) - TINA-TI Spice Model
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Simulation model

INA293 TINA-TI REFERENCE DESIGN (Rev. A)

SBOMAZ3A.TSC (612 KB) - TINA-TI Reference Design
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Simulation model

INA293 PSPICE MODEL (Rev. A)

SBOMAZ5A.ZIP (590 KB) - PSpice Model
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Simulation model

INA293A1 PSpice Model

SBOMBG6.ZIP (36 KB) - PSpice Model
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Simulation model

INA293A2 PSpice Model

SBOMBG7.ZIP (25 KB) - PSpice Model
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Simulation model

INA293A3 PSpice Model

SBOMBG8.ZIP (25 KB) - PSpice Model
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Simulation model

INA293A4 PSpice Model

SBOMBG9.ZIP (25 KB) - PSpice Model
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Simulation model

INA293A5 PSpice Model

SBOMBH0.ZIP (26 KB) - PSpice Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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Calculation tool

Current Sense Amplifier Comparison and Error Tool (Rev. D)

SBOR020D.ZIP (582 KB)
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Design tool

CIRCUIT060035 — Bidirectional current sensing with a window comparator circuit

This bidirectional current sensing solution uses a current-sense amplifier and a high-speed dual comparator with a rail-to-rail input common mode range to create over-current (OC) alert signals at the comparator outputs (OUTA and OUTB) if the input current (IG1) rises above 100 A or falls below (...)
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Design tool

CIRCUIT060037 — Precision over-current latch circuit

This high-side, current sensing solution uses a current sense amplifier, a comparator with an integrated reference and a P-channel MOSFET to create an over-current latch circuit. When a load current greater than 200 mA is detected, the circuit disconnects the system from its power source. The (...)
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Reference designs

TIDA-020031 — Automotive 400-V battery to 12-V, 3.6-kW DC/DC converter reference design

This reference design is a 3.6-kW, automotive 400-V to 12-V unidirectional converter which converts the 200-V to 450-V DC input to 12-V, 300-A maximum output. Circuit breaker is applied for overcurrent and overvoltage protection. The converter is designed with SiC MOSFETs on the high voltage side (...)
document-generic Schematic
Reference designs

TIDA-00302 — Current Shunt Monitor with Transient Robustness Reference Design

This high-side current shunt monitor is used to measure the voltage developed across a current-sensing resistor when current passes through it.

Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)

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SOT-23 (DBV) 5 View options

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