1 Features

1• 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

2 Applications

• Overcurrent protection

• Motor control

• Power-supply protection

• Computers and servers

• Telecom equipment

3 Description

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 limitsetting

resistor. These current-shunt monitors can

measure differential voltage signals on commonmode

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.