INA186-Q1 Texas instruments

INA186-Q1

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INA186-Q1

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Описание

The INA186-Q1 is an automotive, low-power, voltage-output, current-sense amplifier (also called a current-shunt monitor). This device is commonly used for monitoring systems directly connected to an automotive 12-V battery. The INA186-Q1 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. In addition, the input pins have an absolute maximum voltage of 42V.The low input bias current of the INA186-Q1 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 INA186-Q1 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 90 µA of supply current . 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 SC70, SOT-23 (5), and SOT-23 (8) packages. The SC70 and SOT-23 (DDF) packages supports bidirectional current measurement, whereas the SOT-23 (DBV) only supports current measurement in one direction.

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 range, V_CM: –0.2 V to +40 V with survivability up to 42 V (recommended for automotive 12-V battery applications)
Low input bias currents, I_IB: 500 pA (typical)
Low power:
- Low supply voltage, V_S: 1.7 V to 5.5 V
- Low quiescent current, I_Q: 48 µA (typical)
Accuracy:
- Common-mode rejection ratio: 120 dB (minimum)
- Gain error, E_G: ±1% (maximum)
- Gain drift: 10 ppm/°C (maximum)
- Offset voltage, V_OS: ±50 µV (maximum)
- Offset drift: 0.5 µV/°C (maximum)
Bidirectional current sensing capability
Gain options:
- INA186A1-Q1: 25 V/V
- INA186A2-Q1: 50 V/V
- INA186A3-Q1: 100 V/V
- INA186A4-Q1: 200 V/V
- INA186A5-Q1: 500 V/V

Product type	Analog output
Common-mode voltage (max) (V)	40
Common-mode voltage (min) (V)	-0.2
Input offset (±) (max) (µV)	50
Input offset drift (±) (typ) (µV/°C)	0.05
Voltage gain (V/V)	25, 50, 100, 200, 500
CMRR (min) (dB)	120
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 (%)	0.9
Gain error drift (±) (max) (ppm/°C)	10
Slew rate (V/µs)	0.3
Features	Bi-directional, High precision, Low-side Capable
Rating	Automotive
TI functional safety category	Functional Safety-Capable
Operating temperature range (°C)	-40 to 125