AD7874SE

ADCs/DACs - Special Purpose Overview

The AD7874SE is a four-channel, 12-bit simultaneous sampling data acquisition system fabricated in LC2MOS technology. It integrates four track/hold amplifiers, a successive approximation ADC, an internal 3V reference, and an on-chip clock. The device supports ±5V dual supplies with a ±10V input range. Operating in the extended temperature range of -55°C to +125°C, it delivers a 29 kHz sample rate across all channels with 8 μs conversion time per channel. It utilizes a parallel interface for direct connection to microprocessors.

ADCs/DACs - Special Purpose Feature Summary

• Simultaneous sampling of four independent channels using dedicated track/hold amplifiers.
• Extended industrial temperature range (-55°C to +125°C) available via hermetic ceramic packaging.
• Integrated 3V buried Zener reference with buffered output capability.
• Tight aperture delay matching (<4 ns) preserves relative phase information between channels.

ADCs/DACs - Special Purpose Applications

• Phased-array sonar systems requiring precise phase alignment.
• AC motor controllers utilizing multi-channel feedback.
• Adaptive filter implementations.
• Digital signal processing architectures.

ADCs/DACs - Special Purpose Procurement Notes

Verify that the specific orderable part number matches the required package style (E-28A leadless ceramic chip carrier). Confirm whether military processing (MIL-STD-883, Class B) is required, as this may necessitate adding a suffix to the base model. Ensure supply chain documentation aligns with the extended temperature specifications.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7874SE when operation above +85°C is necessary, as commercial versions are limited to that threshold. The S-version designation indicates the extended temperature grade. Verify that the system can accommodate the physical dimensions of the LCCC package compared to standard DIP or SOIC alternatives.

ADCs/DACs - Special Purpose Part Context

The AD7874 family includes variants distinguished by accuracy grades (A/B), packages (N/Q/R/E), and temperature ranges. The SE variant specifically denotes the S-grade performance within the E-package format. This configuration targets high-reliability applications where thermal stability and simultaneous sampling integrity are critical constraints.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible replacements include other AD7874 variants such as the AD7874ANZ or AD7874BRZ, provided the operating temperature requirements do not exceed +85°C. Substituting with lower-grade packages requires verification of thermal management capabilities.