INA302

• 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

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.