AD7891YPZ-1

ADCs/DACs - Special Purpose Overview

The AD7891YPZ-1 is an 8-channel, 12-bit data acquisition system (DAS) manufactured by Analog Devices Inc. It integrates an input multiplexer, track/hold amplifier, high-speed ADC, and a 2.5 V reference on a single chip. Operating from a single 5 V supply, it supports parallel or serial interfaces selectable via the MODE pin. The Y version features an extended temperature range of -55°C to +105°C. Key specifications include a maximum conversion time of 1.6 µs, typical power dissipation of 82 mW in normal mode, and overvoltage protection on all analog channels.

ADCs/DACs - Special Purpose Feature Summary

• 8 Single-Ended Analog Input Channels with Overvoltage Protection
• Parallel and Serial Interface Options Controlled by MODE Pin
• On-Chip Track/Hold Amplifier and 2.5 V Reference
• Extended Industrial Temperature Range (-55°C to +105°C)

ADCs/DACs - Special Purpose Applications

• Data Acquisition Systems
• Motor Control
• Mobile Communication Base Stations
• Instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'Y' confirms the -55°C to +105°C automotive-grade temperature range and 'PZ' indicates the PLCC-44 package. Confirm whether the part number implies the AD7891-1 (±5V/±10V) or AD7891-2 variant, as input ranges differ between models within the same family. Check for Pb-free compliance status associated with the 'Z' suffix.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7891YPZ-1 when an extended operating temperature range down to -55°C is required. Ensure the interface mode (parallel vs. serial) matches the microprocessor capabilities, noting that maximum throughput differs between modes. Verify the required analog input voltage range corresponds to either the AD7891-1 or AD7891-2 internal configuration before finalizing the order.

ADCs/DACs - Special Purpose Part Context

The AD7891 belongs to a family of monolithic 12-bit data acquisition systems. The 'Y' designation specifically denotes the extended temperature grade compared to commercial 'A' or 'B' versions. The 'PZ' suffix identifies the Plastic Leaded Chip Carrier (PLCC) 44-lead package option. This component serves as a complete DAS solution, eliminating the need for external multiplexers or reference buffers in many applications.

ADCs/DACs - Special Purpose Replacement Considerations

Direct substitutes within the same package and temperature grade include other AD7891 variants such as AD7891YS-1 (MQFP package) or AD7891BPZ-1 if accuracy requirements shift. Cross-family replacements like the ADS7891 (Texas Instruments) offer different resolution and speed characteristics but require schematic redesign.