AD7865YSZ-2

Overview

The AD7865YSZ-2 is a four-channel, simultaneous sampling, fast, 14-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. It operates from a single +5 V supply and features an internal 2.5 V reference and on-chip clock oscillator. The device provides four track/hold amplifiers to preserve relative phase information across inputs. It supports input ranges of 0 V to 2.5 V or 0 V to 5 V with straight binary output coding. Key electrical parameters include a maximum conversion time of 2.4 µs per channel, a throughput rate of up to 350 kSPS for a single channel and 100 kSPS for all four channels, and a typical power dissipation of 100 mW in normal mode. The component is housed in a 44-lead Plastic Lead Quad Flatpack (PQFP) package.

Feature Summary

• Four simultaneously sampled inputs with dedicated track/hold amplifiers
• Hardware or software selectable channel sequence for conversion
• High-speed parallel interface compatible with 3 V processors
• Overvoltage protection on analog inputs

Applications

• AC Motor Control
• Uninterruptible Power Supplies
• Industrial Power Meters/Monitors
• Data Acquisition Systems
• Communications

Procurement Notes

Verify the specific suffix 'Y' indicates the extended temperature range of -40°C to +105°C compared to commercial variants. Confirm the '-2' designation corresponds to the unipolar 0 V to 2.5 V or 0 V to 5 V input range. Ensure the package type matches the required 44-lead PQFP footprint for PCB layout compatibility.

Selection Notes

Select this model when simultaneous sampling of four channels is required to maintain phase integrity. Choose the Y version for automotive or high-temperature industrial environments requiring operation up to +105°C. The -2 variant is appropriate for unipolar signal conditioning applications. Consider the 100 mW typical power consumption for thermal management in portable designs.

Part Context

The AD7865 series includes variants with different input ranges and temperature ratings. The AD7865-1 supports bipolar ±5 V and ±10 V ranges, while the AD7865-3 supports ±2.5 V. The AD7865-2 specifically targets unipolar signals. The Y suffix denotes the automotive-grade temperature extension, distinguishing it from the standard A and B commercial grades.

Replacement Considerations

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