INA253 Texas instruments

INA253

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INA253

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Описание

The INA253 is a voltage-output, current sense amplifier with an integrated shunt resistor of 2 mΩ. The INA253 is designed to monitor 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 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 extended operating temperature range (–40°C to +125°C), and are available in a 20-pin TSSOP package.

Precision Integrated Shunt Resistor
- Shunt Resistor: 2 mΩ
- Shunt Inductance: 3 nH
- Shunt Resistor Tolerance: 0.1% (Max)
- ±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% (Max)
  - Gain Drift: 45 ppm/°C (Max)
- Offset:
  - Offset Current: ±15 mA (Max)
  - Offset Drift: 125 µA/°C (Max)
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 (Max)

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	Catalog
Operating temperature range (°C)	-40 to 125