AD7862ARSZ-10REEL

Overview

The AD7862ARSZ-10REEL is a dual 12-bit successive approximation analog-to-digital converter (ADC) from Analog Devices, housed in a 28-lead Shrink Small Outline Package (SSOP). It features two simultaneous sampling channels with four single-ended analog inputs. The device operates on a single +5 V supply, consuming typically 60 mW in normal mode and 50 mW in power-saving mode. It supports an input range of ±10 V with a throughput rate of 250 kSPS. Key electrical parameters include a signal-to-noise ratio of 70 dB minimum, ±1 LSB relative accuracy, and overvoltage protection up to ±17 V.

Feature Summary

• Simultaneous sampling architecture preserves phase relationships between input signals using two independent track/hold amplifiers.
• Integrated internal +2.5 V reference eliminates the need for external voltage references in standard applications.
• High-speed parallel interface allows direct connection to microprocessors and DSPs with standard control signals.
• Automatic power-down mode reduces power consumption significantly after each conversion cycle.

Applications

• AC motor control systems requiring precise phase information.
• Uninterrupted power supplies (UPS) monitoring and data acquisition.
• Industrial data acquisition systems handling bipolar signals.

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging rather than tube packaging when reviewing distributor listings. Confirm the 'ARSZ' designation corresponds to the SSOP package variant and industrial temperature range (-40°C to +85°C). Ensure the '-10' suffix matches the required ±10 V input range specification for your application design.

Selection Notes

Select this component if simultaneous sampling of two channels is required to maintain phase coherence. Compare against the AD7863 for 14-bit resolution needs or the AD7862-3 if a ±2.5 V input range is sufficient. Consider the SSOP package constraints for PCB layout density compared to SOIC or DIP variants.

Part Context

This part belongs to the AD7862 family of dual 12-bit ADCs. It shares core functionality with the AD7862AR-10 but differs in packaging (SSOP vs. SOIC) and reel format. It serves as a pin-compatible upgrade path from older single-channel or lower-resolution ADCs in existing designs.

Replacement Considerations

The AD7863 offers a 14-bit resolution upgrade with pin compatibility. For unipolar applications, the AD7862-2 provides a 0 V to 2.5 V input range. The AD7862-3 is suitable for ±2.5 V input requirements.