AD7862AN-10

Overview

The AD7862AN-10 is a dual 12-bit successive approximation analog-to-digital converter (ADC) operating from a single +5 V supply. It features two independent ADCs with simultaneous sampling and conversion capabilities, supporting four analog input channels grouped into two selectable channels via the A0 pin. The device provides a throughput rate of 250 kSPS with a conversion time of 3.6 μs and an acquisition time of 0.3 μs. It includes an internal +2.5 V reference and accepts an analog input range of ±10 V. Key performance specifications include a signal-to-noise ratio of 70 dB minimum, total harmonic distortion of -78 dB maximum, and low power consumption of 60 mW typical in normal mode.

Feature Summary

• Simultaneous sampling and conversion of two channels to preserve relative phase information
• High-speed parallel interface compatible with standard microprocessors and DSPs
• Integrated overvoltage protection on analog inputs to prevent damage
• Automatic power-down mode for reduced energy consumption in portable applications

Applications

• AC motor control systems
• Uninterrupted power supplies (UPS)
• Data acquisition systems
• Communications equipment

Procurement Notes

Verify the specific suffix 'AN' corresponds to the 28-lead Plastic DIP package and the '-10' indicates the ±10 V input range. Confirm the temperature grade matches the commercial specification (-40°C to +85°C). Ensure ESD precautions are observed during handling as the device is electrostatic sensitive. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity.

Selection Notes

Select the AD7862AN-10 when simultaneous channel sampling is required for phase-sensitive applications. Choose this variant over the AD7862-3 or AD7862-2 if the application signals require a bipolar ±10 V input range. Consider the 28-pin DIP package for through-hole prototyping or legacy board designs. Evaluate the 60 mW power dissipation against thermal constraints in enclosed environments.

Part Context

The AD7862 belongs to Analog Devices' family of high-speed, low-power data converters fabricated using LC2MOS technology. This series offers pin-compatible upgrades, such as the 14-bit AD7863, allowing for resolution enhancements without redesigning the PCB layout. The component is designed for industrial applications requiring precise analog-to-digital conversion with minimal external support circuitry.

Replacement Considerations

The AD7862BR-10Z serves as a pin-compatible alternative within the same package type but may differ in manufacturing lot or minor parameter tolerances. For higher resolution needs, the AD7863 offers a 14-bit upgrade path while maintaining pin compatibility.