INA303 Texas instruments

INA303

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INA303

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Описание

The INA302 and INA303 (INA30x) devices feature a high common-mode, bidirectional, current-sensing amplifier and two high-speed comparators to detect out-of-range current conditions. The INA302 comparators are configured to detect and respond to overcurrent conditions. The INA303 comparators are configured to respond to both overcurrent and undercurrent conditions in a windowed configuration. These devices feature an adjustable limit threshold range for each comparator set using an external limit-setting resistor. These current-shunt monitors can measure differential voltage signals on common-mode voltages that can vary from –0.1 V up to +36 V, independent of the supply. The open-drain alert outputs can be configured to operate in either a transparent mode (output status follows the input state), or in a latched mode (alert output is cleared when the latch is reset). The alert response time for comparator 1 is under 1 µs, and the alert response for comparator 2 is set through an external capacitor ranging from 2 µs to 10 s. These devices operate from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 950 µA. The devices are specified over the extended operating temperature range of –40°C to +125°C, and are available in a 14-pin TSSOP package.

Wide common-mode input range: –0.1 V to +36 V
Dual comparator outputs:
- INA302: Two independent overlimit alerts
- INA303: Window comparator
- Threshold levels set individually
- Comparator 1 alert response: 1 µs
- Comparator 2 adjustable delay: 2 µs to 10 s
- Open-drain outputs with independent latch control modes
High accuracy amplifier:
- Offset voltage: 30 µV (max, A3 version)
- Offset voltage drift: 0.5 µV/°C (max)
- Gain error: 0.15% (max, A3 version)
- Gain error drift: 10 ppm/°C
Available amplifier gains:
- INA302A1, INA303A1: 20 V/V
- INA302A2, INA303A2: 50 V/V
- INA302A3, INA303A3: 100 V/V

Product type	Analog output with integrated comparator
Common-mode voltage (max) (V)	36
Common-mode voltage (min) (V)	0
Input offset (±) (max) (µV)	30
Input offset drift (±) (typ) (µV/°C)	0.02
Voltage gain (V/V)	20, 50, 100
CMRR (min) (dB)	100
Bandwidth (kHz)	450, 500, 550
Supply voltage (max) (V)	5.5
Supply voltage (min) (V)	2.7
Iq (max) (mA)	1.15
Number of channels	1
Comparators (#)	2
Gain error (%)	0.075
Gain error drift (±) (max) (ppm/°C)	10
Slew rate (V/µs)	4
Features	Alert Function, Bi-directional, High precision, Low-side Capable
Rating	Catalog
Operating temperature range (°C)	-40 to 125