INA293A3IDBVR

Current Sense Amplifier

The INA293A3IDBVR is a current sense amplifier from Texas Instruments. View the full INA293A3IDBVR datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

Texas Instruments

Key Specifications

Parameter	Value
-3db Bandwidth	1 MHz
-3db Bandwidth	1 MHz
Amplifier Type	Current Sense
Input Bias Current	20 µA
Quiescent Current	1.5mA
Mounting Type	Surface Mount
Number of Circuits	1
Operating Temperature	-40°C ~ 125°C
Package / Case	SC-74A, SOT-753
Slew Rate	2.5V/µs
Supplier Device Package	SOT-23-5
Supplier Device Package	SOT-23-5
Input Offset Voltage	10 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

PIN	PIN	PIN	TYPE	DESCRIPTION
NAME	INA293A	INA293B	TYPE	DESCRIPTION
GND	2	2	Ground	Ground
OUT	1	1	Output	Output voltage
Vs	5	3	Power	Power supply
IN+	3	4	Input	Shunt resistor positive sense input
IN -	4	5	Input	Shunt 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)

PARAMETER	PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
INPUT	INPUT	INPUT	INPUT	INPUT	INPUT	INPUT
V CM	Common-mode input range (1)	T A = -40°C to +125°C	- 4		110	V
CMRR	Common-mode rejection ratio, input referred	-4 V ≤ V CM ≤ 110 V, T A = -40°C to +125°C	140	160		dB
CMRR	Common-mode rejection ratio, input referred	f = 50 kHz		85		dB
V os	Offset voltage, input referred	INA293x1		±30	±150	μV
V os	Offset voltage, input referred	INA293x2		±15	±80	μV
V os	Offset voltage, input referred	INA293x3		±10	±50	μV
V os	Offset voltage, input referred	INA293x4		±5	±30	μV
V os	Offset voltage, input referred	INA293x5		±2	±20	μV
dV os /dT	Offset voltage drift	T A = -40 °C to +125 °C , INA293x1, INA293x2, INA293x3		±0.05	±0.5	μV/ °C
dV os /dT	Offset voltage drift	T A = -40 °C to +125 °C , INA293x4, INA293x5		±0.025	±0.25	μV/ °C
PSRR	Power supply rejection ratio, input referred	INA293x1, 2.7 V ≤ V S ≤ 20 V, T A = -40°C to +125°C		±1	±8	μV/V
PSRR	Power supply rejection ratio, input referred	INA293x2, INA293x3, 2.7 V ≤ V S ≤ 20 V, T A = -40°C to +125°C		±0.3	±3	μV/V
PSRR	Power supply rejection ratio, input referred	INA293x4, INA293x5, 2.7 V ≤ V S ≤ 20 V, T A = -40°C to +125°C		±0.1	±1	μV/V
I B	Input bias current	I B+ , V SENSE = 0 V	10	20	30	μA
I B	Input bias current	I B- , V SENSE = 0 V	10	20	30	μA

Absolute Maximum Ratings

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

		MIN	MAX	UNIT
Supply Voltage (V s )		- 0.3	22	V
Analog Inputs, V IN+ , V IN - (2)	Differential (V IN+ ) - (V IN - ), INA293A5, INA293B5	- 6	6	V
Analog Inputs, V IN+ , V IN - (2)	Differential (V IN+ ) - (V IN - ), All others	- 12	12	V
Analog Inputs, V IN+ , V IN - (2)	Common - mode	- 20	120	V
Output		GND - 0.3	Vs + 0.3	V
T A	Operating temperature	- 55	150	°C
T J	Junction temperature		150	°C
T stg	Storage temperature	- 65	150	°C

Recommended Operating Conditions

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

		MIN	NOM	MAX	UNIT
V CM	Common-mode input range	- 4	48	110	V
V S	Operating supply range	2.7	5	20	V
V SENSE	Differential sense input range	0		V S / G	V
T A	Ambient temperature	- 40		125	°C

Thermal Information

THERMAL (1)	METRIC	INA293 DBV (SOT-23) PINS	UNIT
		5
R θ JA	Junction-to-ambient thermal resistance	184.7	°C/W
R θ JC(top)	Junction-to-case (top) thermal resistance	105.6	°C/W
R θ JB	Junction-to-board thermal resistance	47.2	°C/W
Ψ JT	Junction-to-top characterization parameter	21.5	°C/W
Ψ JB	Junction-to-board characterization parameter	46.9	°C/W
R θ JC(bot)	Junction-to-case (bottom) thermal resistance	N/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 Number	Manufacturer	Package
INA293	Texas Instruments	SOT
INA293A1	Texas Instruments	—
INA293A2	Texas Instruments	—
INA293A3	Texas Instruments	—
INA293A3IDBVT	Texas Instruments	SC-74A, SOT-753
INA293A4	Texas Instruments	—
INA293A5	Texas Instruments	—
INA293B1	Texas Instruments	—
INA293B2	Texas Instruments	—
INA293B3	Texas Instruments	—
INA293B4	Texas Instruments	—
INA293B5	Texas Instruments	—

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