MAX4071AUA+

The MAX4071AUA+ is a bidirectional, current sense amplifier with reference in 8 pin µMAX package. The wide 1.35V to 24V input common-mode voltage range is independent of the supply voltage ensuring that the current-sense feedback remains accurate even when connected to a battery pack in deep discharge. It has a low 100µA supply current that reduces to only 10µA (typ) in shutdown mode. To achieve maximum flexibility, an external current-sense resistor is used along with a gain select pin (GSEL) to choose either 50V/V or 100V/V. Drive GSEL low to select gain of 50V/V or drive GSEL high to choose gain of 100V/V. A single output pin continuously monitors the transition from charge to discharge and avoids the need for a separate polarity output. Thus it is ideal for monitoring battery charge and discharge currents.

• Supply voltage range is 2.7V to 24V
• Operating temperature range from -40°C to 125°C
• Total output error less than 1.5%
• Internal precision reference is 1.5V
• CMRR of 120dB, input bias current is 2.4µA and PSRR of 120dB
• Load regulation of 2mV/mA at IREFOUT = 0 to 500µA & 4mV/mA at IREFOUT = 0 to -100µA
• 100KHz -3dB bandwidth at gain = 50V/V

Applications

Sensing & Instrumentation, Motor Drive & Control, Consumer Electronics, Power Management

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party