AD7865YSZ-3

Overview

The AD7865YSZ-3 is a four-channel, simultaneous sampling, fast, 14-bit analog-to-digital converter (ADC) manufactured by Analog Devices. It operates from a single +5 V supply and features an internal 2.5 V reference, on-chip clock oscillator, signal conditioning circuitry, and a high-speed parallel interface. The device accepts bipolar input ranges of ±2.5 V with overvoltage protection up to ±18 V. It utilizes a successive approximation architecture with a conversion time of 2.4 µs per channel and a track/hold acquisition time of 0.35 µs. Maximum throughput is 350 kSPS for a single channel and 100 kSPS across all four channels. The component is housed in a 44-lead PQFP package and supports an extended operating temperature range of -40°C to +105°C.

Feature Summary

• Four simultaneously sampled inputs preserve relative phase information across channels.
• Hardware or software selectable channel sequence allows conversion of any subset of the four channels.
• High-speed parallel interface facilitates direct connection to microprocessors and DSPs.
• Low power consumption with a typical standby mode dissipation of 15 µW.

Applications

• AC motor control systems
• Uninterruptible power supplies
• Industrial power meters and monitors
• Data acquisition systems
• Communications equipment

Procurement Notes

Verify the specific suffix 'Y' indicates the automotive-grade temperature range (-40°C to +105°C) compared to commercial variants. Confirm the '-3' designation corresponds to the ±2.5 V bipolar input range. Ensure the package type matches the required 44-lead PQFP footprint. Check for RoHS compliance status if environmental regulations apply to the assembly process.

Selection Notes

Select this model when simultaneous multi-channel sampling is required to maintain phase coherence. Choose the Y version for applications requiring operation at elevated temperatures up to 105°C. The -3 variant is appropriate for signal processing circuits utilizing standard ±2.5 V ranges. Consider the 14-bit resolution and 350 kSPS speed for high-performance data acquisition needs.

Part Context

The AD7865 series includes variants with different input ranges and accuracy grades. The AD7865-1 supports ±5 V and ±10 V ranges, while the AD7865-2 offers unipolar 0 V to 2.5 V or 0 V to 5 V options. The AD7865-3, which includes the AD7865YSZ-3, is optimized for the common ±2.5 V signal processing range. Temperature grades include A and B for commercial use and Y for automotive environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.