INA190 Texas instruments

INA190

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INA190

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Описание

The INA190 is a low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA190 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.The INA190 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in UQFN, SC70, and SOT-23 packages.

Low input bias currents: 500 pA (typ)
(enables microamp current measurement)
Low power:
- Low supply voltage, V_S: 1.7 V to 5.5 V
- Low shutdown current: 100 nA (max)
- Low quiescent current: 50 µA at 25°C (typ)
Accuracy:
- Common-mode rejection ratio: 132 dB (min)
- Gain error: ±0.2% (A1 device)
- Gain drift: 7 ppm/°C (max)
- Offset voltage, V_OS: ±15 µV (max)
- Offset drift: 80 nV/°C (max)
Wide common-mode voltage: –0.2 V to +40 V
Bidirectional current sensing capability
Gain options:
- INA190A1: 25 V/V
- INA190A2: 50 V/V
- INA190A3: 100 V/V
- INA190A4: 200 V/V
- INA190A5: 500 V/V

Product type	Analog output
Common-mode voltage (max) (V)	40
Common-mode voltage (min) (V)	-0.2
Input offset (±) (max) (µV)	15
Input offset drift (±) (typ) (µV/°C)	0.01
Voltage gain (V/V)	25, 50, 100, 200, 500
CMRR (min) (dB)	132
Bandwidth (kHz)	27, 32, 35, 37, 45
Supply voltage (max) (V)	5.5
Supply voltage (min) (V)	1.7
Iq (max) (mA)	0.09
Number of channels	1
Comparators (#)	0
Gain error (%)	0.2
Gain error drift (±) (max) (ppm/°C)	7
Slew rate (V/µs)	0.3
Features	Bi-directional, Low-side Capable, Ultra precise
Rating	Catalog
Operating temperature range (°C)	-40 to 125