AD7862ARZ-10

Overview

The AD7862ARZ-10 is a dual 12-bit successive approximation analog-to-digital converter (ADC) operating from a single +5 V supply. It features two simultaneous sampling track/hold amplifiers and an internal +2.5 V reference, supporting four analog input channels grouped into two selectable channels via the A0 pin. The device accepts ±10 V input ranges with overvoltage protection up to ±17 V. Key electrical parameters include a maximum conversion time of 3.6 μs, a throughput rate of 250 kSPS, and typical power dissipation of 60 mW in normal mode. Signal-to-noise ratio is specified at 70 dB minimum, with differential nonlinearity and integral nonlinearity both within ±1 LSB.

Feature Summary

• Simultaneous sampling and conversion of two independent channels preserves relative phase information between input signals.
• Integrated high-speed parallel interface allows direct connection to microprocessors and digital signal processors.
• Built-in automatic power-down mode reduces power consumption significantly after each conversion cycle completes.
• Analog inputs feature robust overvoltage protection capabilities that prevent damage during voltage excursions.

Applications

• AC motor control systems requiring precise phase tracking
• Uninterrupted power supplies for monitoring critical voltages
• Data acquisition systems needing multi-channel synchronization

Procurement Notes

Verify the specific suffix designation against official documentation to confirm input range compatibility. Ensure ESD precautions are implemented during handling due to device sensitivity. Confirm package availability matches the required SOIC-28 form factor for your PCB layout constraints.

Selection Notes

Select this component when simultaneous channel sampling is required rather than multiplexed acquisition. Verify that the ±10 V input range aligns with your system's signal levels. Consider the parallel interface requirements if interfacing with legacy or specific microcontroller architectures.

Part Context

This device belongs to the AD7862 family of dual ADCs. It serves as a 12-bit predecessor to the 14-bit AD7863, which offers pin-compatible upgrades. The architecture utilizes Linear Compatible CMOS technology to balance precision bipolar performance with low-power CMOS logic efficiency.

Replacement Considerations

The AD7863 is a 14-bit pin-compatible upgrade option. Other variants in the series include AD7862ARZ-3 for ±2.5 V ranges and AD7862ARZ-2 for unipolar applications.