AD7862AN-3

Overview

The AD7862AN-3 is a dual 12-bit successive approximation analog-to-digital converter operating from a single +5 V supply. It features two simultaneous sampling channels with four analog inputs (VA1, VA2, VB1, VB2) and an internal +2.5 V reference. The device supports an input voltage range of ±2.5 V with a throughput rate of 250 kSPS. Conversion time is 3.6 μs, and the track/hold acquisition time is 0.3 μs. It utilizes a high-speed parallel interface and offers overvoltage protection up to ±7 V on analog inputs.

Feature Summary

• Simultaneous sampling and conversion of two independent channels preserving relative phase information
• Internal +2.5 V reference with option for external reference connection
• High-speed parallel data interface compatible with standard microprocessors
• Automatic power-down mode reducing power consumption during idle periods

Applications

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

Procurement Notes

Verify the specific suffix AN indicates the 28-lead Plastic DIP package and the -3 suffix denotes the ±2.5 V input range. Confirm the revision level matches the required datasheet specifications. Ensure ESD precautions are observed during handling as the device is sensitive to electrostatic discharge.

Selection Notes

Select this model when bipolar ±2.5 V input signals require simultaneous digitization at 250 kSPS. Consider the AD7862-10 for ±10 V ranges or the AD7862-2 for unipolar applications. Verify that the 28-pin DIP package fits the target PCB layout constraints compared to SOIC or SSOP alternatives.

Part Context

Part of the AD7862 family of dual 12-bit ADCs. Pin-compatible with the 14-bit AD7863 upgrade. Manufactured using Linear Compatible CMOS process. Available in commercial temperature range (-40°C to +85°C).

Replacement Considerations

AD7862BR-3Z is a pin-compatible alternative in SOIC package. AD7863 series offers 14-bit resolution with identical pinout.