INA293-Q1 Texas instruments

INA293-Q1

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INA293-Q1

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Описание

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.

AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40 °C to +125 °C, T_A
Functional Safety-Capable
- Documentation available to aid functional safety system design
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

Product type	Analog output
Common-mode voltage (max) (V)	110
Common-mode voltage (min) (V)	-4
Input offset (±) (max) (µV)	20
Input offset drift (±) (typ) (µV/°C)	0.025
Voltage gain (V/V)	20, 50, 100, 200, 500
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
Gain error (%)	0.15
Gain error drift (±) (max) (ppm/°C)	10
Slew rate (V/µs)	2.5
Features	Low-side Capable, Ultra precise
Rating	Automotive
TI functional safety category	Functional Safety-Capable
Operating temperature range (°C)	-40 to 125