INA253-Q1 Texas instruments

INA253-Q1

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INA253-Q1

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Описание

The INA253-Q1 is an automotive, voltage-output, current sense amplifier with an integrated shunt resistor of 2 mΩ. The INA253-Q1 monitors bidirectional currents over a wide common-mode range from –4 V to +80 V, independent of the supply voltage. Three fixed gains are available: 100 mV/A, 200 mV/A, and 400 mV/A. The integration of the precision resistor with a zero-drift chopped amplifier provides calibration-equivalent measurement accuracy, ultra-low temperature-drift performance of 15 ppm/ °C, and an optimized Kelvin layout for the sensing resistor.The INA253-Q1 is designed with enhanced PWM rejection circuitry to suppress large (dv/dt) signals that enable real-time continuous current measurements. The measurements are critical for in-line current measurements in a motor-drive application, and for solenoid valve-control applications.This device operates from a single 2.7-V to 5.5-V power supply, drawing a maximum of 3 mA of supply current. All gain versions are specified over the operating temperature range of –40 °C to +125 °C, and are available in a 20-pin TSSOP package.

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
Precision integrated shunt resistor
- Shunt resistor: 2 mΩ
- Shunt inductance: 3 nH
- Shunt resistor tolerance: 0.1% (maximum)
- ±15 A continuous from –40 °C to +85 °C
- 0 °C to 125 °C temperature coefficient: 10 ppm/°C
High bandwidth: 350 kHz
Enhanced PWM rejection
Excellent CMRR
- > 120-dB DC CMRR
- 90-dB AC CMRR at 50 kHz
Accuracy:
- Gain:
  - Gain error: 0.4% (maximum)
  - Gain drift: 45 ppm/°C (maximum)
- Offset:
  - Offset current: ±15 mA (maximum)
  - Offset drift: 125 µA/°C (maximum)
Wide common-mode range: –4 V to +80 V
Available gains: 100 mV/A, 200 mV/A, and 400 mV/A
Quiescent current: 2.4 mA (maximum)

Common-mode voltage (max) (V)	80
Common-mode voltage (min) (V)	-4
Gain error (%)	0.4
Gain error drift (±) (max) (ppm/°C)	45
CMRR (min) (dB)	120
Bandwidth (kHz)	350
Supply voltage (max) (V)	5.5
Supply voltage (min) (V)	2.7
Iq (max) (mA)	2.6
Features	Bi-directional, Enhanced PWM Rejection, Integrated Shunt, Low-side Capable
Rating	Automotive
TI functional safety category	Functional Safety-Capable
Operating temperature range (°C)	-40 to 125