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INA293A3IDBVT

Current Sense Amplifier

The INA293A3IDBVT is a current sense amplifier from Texas Instruments. View the full INA293A3IDBVT datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

Texas Instruments

Category

Integrated Circuits

Package

SC-74A, SOT-753

Lifecycle

Active

Key Specifications

ParameterValue
-3db Bandwidth1 MHz
-3db Bandwidth1 MHz
Amplifier TypeCurrent Sense
Input Bias Current20 µA
Quiescent Current1.5mA
Mounting TypeSurface Mount
Number of Circuits1
Operating Temperature-40°C ~ 125°C
Package / CaseSC-74A, SOT-753
Slew Rate2.5V/µs
Supplier Device PackageSOT-23-5
Supplier Device PackageSOT-23-5
Input Offset Voltage10 µV
Supply Voltage Span (Max)20 V
Supply Voltage Span (Min)2.7 V

Overview

Part: INA293 — Texas Instruments

Type: Ultra-Precision Current Sense Amplifier

Description: The INA293 is an ultra-precision current sense amplifier capable of measuring voltage drops across shunt resistors over a wide common-mode range of -4 V to 110 V, featuring 1.3 MHz bandwidth and 85 dB AC CMRR at 50 kHz.

Operating Conditions:

  • Supply voltage: 2.7–20 V
  • Operating temperature: -40 to +125 °C
  • Common-mode input range: -4 to 110 V

Absolute Maximum Ratings:

  • Max supply voltage: 22 V
  • Max common-mode input voltage: 120 V
  • Max junction/storage temperature: 150 °C

Key Specs:

  • DC CMRR: 160 dB (typical, -4 V ≤ V CM ≤ 110 V, T A = -40°C to +125°C)
  • AC CMRR: 85 dB (typical, f = 50 kHz)
  • Offset voltage: ±2 μV (typical, INA293x5)
  • Offset voltage drift: ±0.025 μV/°C (typical, T A = -40 °C to +125 °C, INA293x4, INA293x5)
  • Gain error: ±0.15 % (max, GND + 50 mV ≤ V OUT ≤ V S - 200 mV)
  • Gain drift: ±10 ppm/°C (max, T A = -40°C to +125°C)
  • Bandwidth: 1.3 MHz (typical, INA293x1, INA293x2, C LOAD = 5 pF)
  • Slew rate: 2.5 V/μs (typical, rising edge)
  • Quiescent current: 1.5 mA (typical)

Features:

  • Wide common-mode voltage: -4 V to +110 V
  • Ultra-precision with low offset voltage and gain error
  • High bandwidth for fast overcurrent protection
  • Five gain options: 20V/V, 50V/V, 100V/V, 200V/V, 500V/V
  • Low input bias current: 20 μA (typical)

Applications:

  • Active antenna systems mMIMO (AAS)
  • Macro remote radio units (RRU)
  • 48V rack servers
  • 48V commercial network and server power supplies (PSU)
  • 48V battery management systems (BMS)

Package:

  • SOT-23 (5-pin) (2.90mm × 1.60mm)

Pin Configuration

图 5-1. INA293A: DBV Package 5-Pin SOT-23 Top View

图 5-2. INA293B: DBV Package 5-Pin SOT-23 Top View

表 5-1. Pin Functions

PINPINPINTYPEDESCRIPTION
NAMEINA293AINA293BTYPEDESCRIPTION
GND22GroundGround
OUT11OutputOutput voltage
Vs53PowerPower supply
IN+34InputShunt resistor positive sense input
IN -45InputShunt resistor negative sense input

Electrical Characteristics

at T A = 25 °C, V S = 5 V, V SENSE = VIN+ - V IN= 0.5 V / Gain, V CM = VIN- = 48 V (unless otherwise noted)

PARAMETERPARAMETERTEST CONDITIONSMINTYPMAXUNIT
INPUTINPUTINPUTINPUTINPUTINPUTINPUT
V CMCommon-mode input range (1)T A = -40°C to +125°C- 4110V
CMRRCommon-mode rejection ratio, input referred-4 V ≤ V CM ≤ 110 V, T A = -40°C to +125°C140160dB
CMRRCommon-mode rejection ratio, input referredf = 50 kHz85dB
V osOffset voltage, input referredINA293x1±30±150μV
V osOffset voltage, input referredINA293x2±15±80μV
V osOffset voltage, input referredINA293x3±10±50μV
V osOffset voltage, input referredINA293x4±5±30μV
V osOffset voltage, input referredINA293x5±2±20μV
dV os /dTOffset voltage driftT A = -40 °C to +125 °C , INA293x1, INA293x2, INA293x3±0.05±0.5μV/ °C
dV os /dTOffset voltage driftT A = -40 °C to +125 °C , INA293x4, INA293x5±0.025±0.25μV/ °C
PSRRPower supply rejection ratio, input referredINA293x1, 2.7 V ≤ V S ≤ 20 V, T A = -40°C to +125°C±1±8μV/V
PSRRPower supply rejection ratio, input referredINA293x2, INA293x3, 2.7 V ≤ V S ≤ 20 V, T A = -40°C to +125°C±0.3±3μV/V
PSRRPower supply rejection ratio, input referredINA293x4, INA293x5, 2.7 V ≤ V S ≤ 20 V, T A = -40°C to +125°C±0.1±1μV/V
I BInput bias currentI B+ , V SENSE = 0 V102030μA
I BInput bias currentI B- , V SENSE = 0 V102030μA

Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)

MINMAXUNIT
Supply Voltage (V s )- 0.322V
Analog Inputs, V IN+ , V IN - (2)Differential (V IN+ ) - (V IN - ), INA293A5, INA293B5- 66V
Analog Inputs, V IN+ , V IN - (2)Differential (V IN+ ) - (V IN - ), All others- 1212V
Analog Inputs, V IN+ , V IN - (2)Common - mode- 20120V
OutputGND - 0.3Vs + 0.3V
T AOperating temperature- 55150°C
T JJunction temperature150°C
T stgStorage temperature- 65150°C

Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MINNOMMAXUNIT
V CMCommon-mode input range- 448110V
V SOperating supply range2.7520V
V SENSEDifferential sense input range0V S / GV
T AAmbient temperature- 40125°C

Thermal Information

THERMAL (1)METRICINA293 DBV (SOT-23) PINSUNIT
5
R θ JAJunction-to-ambient thermal resistance184.7°C/W
R θ JC(top)Junction-to-case (top) thermal resistance105.6°C/W
R θ JBJunction-to-board thermal resistance47.2°C/W
Ψ JTJunction-to-top characterization parameter21.5°C/W
Ψ JBJunction-to-board characterization parameter46.9°C/W
R θ JC(bot)Junction-to-case (bottom) thermal resistanceN/A°C/W

Typical Application

The INA293 amplifies the voltage developed across a current-sensing resistor as current flows through the resistor to the load. The wide input common-mode voltage range and high common-mode rejection of the INA293 make it usable over a wide range of voltage rails while still maintaining an accurate current measurement.

Related Variants

The following components are covered by the same datasheet.

Part NumberManufacturerPackage
INA293Texas InstrumentsSOT
INA293A1Texas Instruments—
INA293A2Texas Instruments—
INA293A3Texas Instruments—
INA293A3IDBVRTexas Instruments—
INA293A4Texas Instruments—
INA293A5Texas Instruments—
INA293B1Texas Instruments—
INA293B2Texas Instruments—
INA293B3Texas Instruments—
INA293B4Texas Instruments—
INA293B5Texas Instruments—
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