Home Amplifiers Current-sense amplifiers Analog current-sense amplifiers
Home
Amplifiers
Current-sense amplifiers
Analog current-sense amplifiers

INA293

ACTIVE

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

Order now
Data sheet

INA293

ACTIVE
Data sheet Order now

Product details

Product type Analog output Common-mode voltage (max) (V) 110 Common-mode voltage (min) (V) -4 Input offset (±) (max) (µV) 20, 30, 50, 80, 150 Input offset drift (±) (typ) (µV/°C) 0.025 Features Low-side Capable, Ultra precise Rating Catalog Voltage gain (V/V) 20, 50, 100, 200, 500 CMRR (min) (dB) 140 Bandwidth (kHz) 900, 1000, 1300 Supply voltage (max) (V) 20 Supply voltage (min) (V) 2.7 Iq (max) (mA) 2.25 Number of channels 1 Comparators (#) 0 Gain error (%) 0.15 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 2.5 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 110 Common-mode voltage (min) (V) -4 Input offset (±) (max) (µV) 20, 30, 50, 80, 150 Input offset drift (±) (typ) (µV/°C) 0.025 Features Low-side Capable, Ultra precise Rating Catalog Voltage gain (V/V) 20, 50, 100, 200, 500 CMRR (min) (dB) 140 Bandwidth (kHz) 900, 1000, 1300 Supply voltage (max) (V) 20 Supply voltage (min) (V) 2.7 Iq (max) (mA) 2.25 Number of channels 1 Comparators (#) 0 Gain error (%) 0.15 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 2.5 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • 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, INA293B1 : 20 V/V
    • INA293A2, INA293B2 : 50 V/V
    • INA293A3, INA293B3 : 100 V/V
    • INA293A4, INA293B4 : 200 V/V
    • INA293A5, INA293B5 : 500 V/V
  • High bandwidth: 1.3 MHz
  • Slew rate: 2.5 V/µs
  • Quiescent current: 1.5 mA
  • 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, INA293B1 : 20 V/V
    • INA293A2, INA293B2 : 50 V/V
    • INA293A3, INA293B3 : 100 V/V
    • INA293A4, INA293B4 : 200 V/V
    • INA293A5, INA293B5 : 500 V/V
  • High bandwidth: 1.3 MHz
  • Slew rate: 2.5 V/µs
  • Quiescent current: 1.5 mA

The INA293 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 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 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA293 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 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 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 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 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA293 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 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.
filter Find other Analog current-sense amplifiers
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Pin-for-pin with same functionality to the compared device
INA281 ACTIVE -4-V to 110-V, 1.3-MHz, high-precision current sense amplifier Identical functionality with reduced accuracy

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 13
Top documentation Type Title Format options Date
* Data sheet INA293 –4 V to 110 V, 1.3-MHz, Ultra-Precise Current Sense Amplifier datasheet (Rev. B) PDF | HTML 10 Aug 2022
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18 Nov 2024
Application brief Current Sensing in an H-Bridge (Rev. D) PDF | HTML 07 Apr 2023
Application brief High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. D) PDF | HTML 15 Aug 2022
Application note High Side, Bidirectional Current Sensing Circuit With Unidirectional Current PDF | HTML 18 Mar 2022
Application brief Safety and Protection for Discrete Digital Outputs in a PLC System Using Current (Rev. B) PDF | HTML 10 Mar 2022
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022
Application note Bidirectional Current Sensing With Unidirectional Current Shunt Monitor PDF | HTML 07 Oct 2021
Application note Current Shunt Amplifier Considerations for Driving SAR ADCs PDF | HTML 23 Mar 2021
Application brief High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) PDF | HTML 23 Feb 2021
Application brief Benefits of Intergated Low Inductive Shunt for PWM Applications 17 Jun 2017
Application brief 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 (...)

User guide: PDF
Not available on TI.com
Simulation model

INA293 PSPICE MODEL (Rev. A)

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

INA293 TINA-TI REFERENCE DESIGN (Rev. A)

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

INA293 TINA-TI SPICE MODEL (Rev. A)

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

INA293A1 PSpice Model

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

INA293A2 PSpice Model

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

INA293A3 PSpice Model

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

INA293A4 PSpice Model

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

INA293A5 PSpice Model

SBOMBH0.ZIP (26 KB) - PSpice Model
Download
Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

Supported products & hardware

Supported products & hardware
Launch Download
Calculation tool

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
Supported products & hardware

Supported products & hardware
Download
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 (...)
View Options
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 (...)
View Options
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 (...)
Request
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 (...)
User guide: PDF
View Options
Reference designs

PMP22951 — 54-V, 3-kW phase-shifted full-bridge with active clamp reference design

is reference design is a GaN-based 3-kW phase-shifted full-bridge (PSFB) converter. This design uses an active clamp on the secondary side to minimize the voltage stress on the synchronous rectifier (SR) MOSFETs enabling the use of lower voltage rating MOSFETs that possess better figure-of-merit (...)
Test report: PDF
Reference designs

PMP23126 — 3-kW phase-shifted full bridge with active clamp reference design with > 270-W/in3 power density

This reference design is a GaN-based 3-kW phase-shifted full bridge (PSFB) targeting maximum power density. The design has an active clamp to minimize voltage stress on the secondary synchronous rectifier MOSFETs enabling use of lower voltage-rating MOSFETs with better figure-of-merit (FoM). (...)
Test report: PDF
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 (...)

Design guide: PDF
Schematic: PDF
Reference designs

TIDA-010237 — AC and DC current fault detection reference design

This reference design detects mA-level AC and DC ground fault currents. An auto-oscillation circuit is implemented using a DRV8220 H-bridge that drives the magnetic core in and out of saturation. In addition, an active filter circuit is implemented to identify fault current signal and level.
Design guide: PDF
Reference designs

PMP22339 — High voltage 800-W SEPIC converter reference design for server battery backup charging

This discontinuous conduction mode (DCM) non-isolated 800-W SEPIC converter battery charger reference design provides an adjustable output voltage and current. The output voltage can be adjusted from 282 V to 400 V by setting an external DC voltage between 0 V to 3 V. The output charging current (...)
User guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBV) 5 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos