INA293-Q1 AEC-Q100, -4 to 110V, 1mhz, high-precision current sense amplifier

Sample availability

Preproduction samples are available (PINA293AxQDBVRQ1). Request now

Description

The INA293-Q1 is a versatile, automotive, high-voltage, unidirectional, voltage-output, current-sense amplifier that senses voltage drops across external sense (shunt) resistors over a wide common-mode voltage range from –4 V to 110 V. The negative common-mode voltage allows the device to operate below ground, thus accommodating the precise measurement of a recirculating current in typical
h-bridge applications. The INA293-Q1 amplifier has a bandwidth of 1 MHz at gain of 20 V/V. The 1-MHz bandwidth in combination with a low offset of < 200 uV (max) provides fast settling response with accurate measurements in a large common-mode switching transients.

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 current-sensing applications.

The INA293-Q1 is specified over the operating temperature range of −40°C to +125°C, and is offered in a space-saving SOT-23 package.

Features

AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, T_A
Wide common-mode voltage:
- Operational voltage: −4 V to +110 V
- Survival voltage: −20 V to +116 V
Excellent CMRR
- 160-dB dc CMRR
- 85-dB ac CMRR at 50 kHz
Accuracy
- Gain
  - Gain error: 0.2% (maximum)
  - Gain drift: 10 ppm/°C (maximum)
- Offset
  - Offset voltage: ±200 µV (maximum)
  - Offset drift: ±1 µV/°C (maximum)
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
Bandwidth: 1 MHz
Slew rate: 3 V/µs
Quiescent current: 1.5 mA

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INA293-Q1 Error Analysis

Ideal Shunt Resistor:

0.001m ≤

mOhm ≤ 100m

Sensed Current Range:

0.0001 ≤

A ≤ 100

Supply Voltage:

2.7 ≤

V ≤ 20

Common Mode Voltage:

-4 ≤

V ≤ 110

Operating Temperature:

-40 ≤

C ≤ 125

X Scale: Linear Logarithmic

Guide

Ideal Shunt Resistor : An ideal shunt resistor is a resistor with zero percent tolerance error and has zero variation over temperature

Sensed Current Range: These fields allow the user to select an operational current range they are interested in.

Common Mode Voltage: The Common Mode voltage range needed is determined by the node voltage the device is connected to where the current is being measured.

Supply Voltage: Supply voltage is the voltage required for device operation.

Operating Temperature: The error curve will be generated at room temperature (25°C) and the specified temperature.

(The limits for each parameter are preset by the selected TI device)

Help

NOTE 1:

This error tool calculates the root sum square (RSS) error as opposed to worst case error. Worst case error assumes all error sources are simultaneously at the worst value. This is an unlikely scenario. The RSS error methodology is a more realistic worst case system error condition.

NOTE 2:

The room temperature curve is calculated from the following equation:

e = ( V _OS V _SHUNT + |V _CMSYS - V_CMDS| x CMRR V _SHUNT + |V _SSYS - V_SDS| x PSRR V _SHUNT ) 2 + (e_GN) 2

V_OS		Amplifier offset voltage at 25 ^° C
V_SHUNT		Sensed current multiplied by shunt resisto
V_CMSYS		Chosen common mode voltage
V_CMDS		Data sheet specified common mode voltage for V_OS
CMRR		Amplifier specified common mode rejection in V/V
V_SSYS		Chosen supply voltage
V_SDS		Data sheet specified supply voltage for V_OS
e_GN		Amplifier gain error

For the at temperature curve, the drift specified in the data sheet is added to both the V_OS term and the e_GN term.

Additional error sources such as amplifier linearity, bias current, and reference voltage input are not included in this analysis. The effect of these errors sources can be found in the individual device datasheets.

More information on calculating error can be found in the Getting Started with Current Sense Amplifier Video Training Series.

Parametrics

Compare all products in Current sense amplifiers analog output

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Part number	Order	Common mode voltage (Max) (V)	Common mode voltage (Min) (V)	Input offset (+/-) (Max) (uV)	Input offset drift (+/-) (Typ) (uV/C)	Gain (V/V)	Gain error (%)	Gain error drift (+/-) (Max) (ppm/°C)	CMRR (Min) (dB)	Bandwidth (kHz)	Supply voltage (Max) (V)	Supply voltage (Min) (V)	Iq (Max) (mA)	Number of channels (#)	Features	Rating	Operating temperature range (C)	Package Group	Package size: mm2:W x L (PKG)
INA293-Q1	Order now	110	-4	150	0.05	100 20 200 50 500	0.25	10	132	1300	20	2.7	2.5	1	Low-side Capable	Automotive	-40 to 125	SOT-23 \| 5	5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 \| 5)

INA293-Q1 PREVIEW This product is prototype/experimental and has not been released to the market. Testing and final processes may not be complete. This product may be subject to further changes or possible discontinuation. AEC-Q100, -4 to 110V, 1mhz, high-precision current sense amplifier