AD7874ANZ

ADCs/DACs - Special Purpose Overview

The AD7874ANZ is a four-channel, 12-bit simultaneous sampling data acquisition system manufactured by Analog Devices Inc. It integrates a high-speed successive approximation ADC, four independent track/hold amplifiers, an internal 3V reference, and an on-chip clock. The device operates with ±5 V supplies and supports a 29 kHz sample rate across all channels. Key electrical parameters include a maximum conversion time of 8 μs per channel, a typical signal-to-noise ratio of 70 dB, and a differential nonlinearity of ±1 LSB. It utilizes a parallel digital interface for direct connection to microprocessors.

ADCs/DACs - Special Purpose Feature Summary

• Four on-chip track/hold amplifiers enable true simultaneous sampling of input channels.
• Integrated 3V buried Zener reference with REF OUT capability for multi-device systems.
• Tight aperture delay matching of less than 4 ns between channels.
• Fast 12-bit SAR ADC with 8 μs conversion time per channel.

ADCs/DACs - Special Purpose Applications

• Phased-array sonar systems
• AC motor controllers
• Adaptive filters
• Digital signal processing

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'ANZ' corresponds to the plastic DIP-28 package and commercial temperature range (-40°C to +85°C). Confirm RoHS compliance status with the supplier. Ensure the ordering documentation matches the REV C datasheet specifications for SNR and accuracy grades.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7874ANZ when phase coherence between multiple analog inputs is critical due to its simultaneous sampling architecture. Choose this part over single-track/hold ADCs if the application requires preserving relative phase information without external synchronization circuitry. Verify that the ±10 V input range aligns with the system signal levels.

ADCs/DACs - Special Purpose Part Context

The AD7874 belongs to the AD7874 family of data acquisition systems. The 'A' version denotes a minimum Signal-to-Noise Ratio of 70 dB and ±1 LSB relative accuracy. The 'N' suffix indicates a 28-pin Plastic Dual In-Line Package (PDIP). This component is fabricated using Analog Devices' LC2MOS process.

ADCs/DACs - Special Purpose Replacement Considerations

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