AD7874BRZ

ADCs/DACs - Special Purpose Overview

The AD7874BRZ 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 ±5V supplies and supports a parallel digital interface. Key electrical parameters include a 29 kHz sample rate for all channels, a maximum aperture delay matching of 4 ns, and a signal-to-noise ratio of 70 dB minimum. It is housed in a 28-pin SOIC package.

ADCs/DACs - Special Purpose Feature Summary

• Four on-chip track/hold amplifiers enable true simultaneous sampling of input channels.
• Tight aperture delay matching ensures minimal phase errors between channels.
• Integrated 3V buried Zener reference with buffered output capability.
• Fast microprocessor interface compatible with 16-bit systems.

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 ordering suffix 'R' corresponds to the SOIC-28 package variant. Confirm the temperature range matches the B version specification (-40°C to +85°C). Ensure supply voltages are strictly maintained within ±5% of nominal ±5V levels to meet performance specifications.

ADCs/DACs - Special Purpose Selection Notes

Select this component when simultaneous multi-channel sampling is required to preserve relative phase information. The B version offers improved accuracy (±1/2 LSB) compared to the A version. Consider the S version if operation below -40°C or above +85°C is necessary.

ADCs/DACs - Special Purpose Part Context

The AD7874BRZ belongs to the AD7874 family of LC2MOS data acquisition systems. It is distinct from single-channel variants like the AD7876. The BRZ designation indicates the SOIC package and RoHS compliance.

ADCs/DACs - Special Purpose Replacement Considerations

The AD7874BNZ is a PDIP-28 through-hole equivalent. The AD7874ARZ is the SOIC package variant with standard accuracy specifications.