MAX4373HEUA

MAX4373HEUA is a Maxim/Analog Devices high-side current-sense amplifier. It measures the voltage drop across a shunt resistor placed on the high side of a supply and outputs a voltage proportional to the load current, enabling precise current monitoring and protection for power electronics.
Key features (typical):
- Wide input common-mode range for high-side sensing
- Low offset and drift for accurate measurements
- Rail-to-rail output interfacing to ADCs
- Fast response and protection (fault/short conditions)
- Low quiescent current
- 8-pin package; HEUA suffix indicates lead-free, extended-temperature variant
Typical applications:
- Automotive and industrial power management
- DC-DC converters, motor drivers
- Battery management and protection
How to use:
- Connect VIN+ and VIN− across the sense resistor
- Power the device per datasheet (Vcc/GND)
- Read Vout with an MCU ADC and scale by the device’s gain
- Use enable/shutdown if available
For exact electrical specs, pinout, and the correct package/temperature grade, consult the MAX4373HEUA datasheet on Analog Devices/Maxim’s site.

Here are typical features of the MAX4373HEUA (datasheet should be consulted for exact numbers):
- Single-supply operation from about 2.7 V to 5.5 V
- Rail-to-rail input and rail-to-rail output
- Low offset voltage with low drift for precise analog sensing
- Extremely low input bias current and low noise
- High common-mode rejection and good power-supply rejection
- Wide common-mode input range, including near rails
- Input protection and overvoltage/short-circuit protection on inputs
- Low quiescent current (micropower operation)
- Fast settling behavior
- Enable/power-down control (optional shutdown)
- Small 8-pin package (compact footprint)
- Operating temperature range suitable for harsh environments (industrial/automotive-grade variants)
Note: Exact figures ( offsets, currents, temp range, etc.) vary by lot and package; please verify the latest datasheet for precise specifications and the HEUA/package variant.

The MAX4373HEUA is available in an 8-pin MSOP package (MSOP-8).

- Pin count: 8 pins
- Function: Precision, low-noise rail-to-rail input/output operational amplifier (single-supply) for signal amplification and conditioning.

Manufacturer: Maxim Integrated (now part of Analog Devices).
What kind of company: A global semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (e.g., op-amps, ADCs/DACs, power management, sensors, protection devices).

Applications of MAX4373HEUA include:
- Precision sensor signal conditioning and instrumentation
- Differential/bridge-sensor front-ends (load cells, RTDs, thermocouples)
- Low-noise amplification for ADC front-ends
- Current-sense and shunt-monitoring
- Automotive and industrial sensing
- Medical instrumentation and portable measurement devices