AD7237ATQ

Overview

The AD7237ATQ is a dual 12-bit voltage-output digital-to-analog converter (DAC) from the DACPORT family, fabricated in LC2MOS technology. It integrates two independent DAC channels with on-chip buffered output amplifiers and a temperature-compensated Zener voltage reference. The device supports single or dual supply operation, accepting +12 V to +15 V on VDD and 0 V or -12 V to -15 V on VSS. It features an 8-bit parallel loading structure for the AD7237A variant, utilizing address lines A0/A1 and a common LDAC signal for simultaneous updates. The T-version suffix indicates an extended operating temperature range of -55°C to +125°C.

Feature Summary

• Dual 12-bit resolution with ±1/2 LSB relative accuracy (T version)
• Integrated 5 V buried Zener reference and buffered output amplifiers
• Extended industrial temperature range: -55°C to +125°C
• Single-supply (0 V to +10 V) or dual-supply (±5 V) output configurations

Applications

• Microprocessor-controlled data acquisition systems
• Programmable gain amplifier offset adjustment
• Industrial process control loop actuators
• Waveform generation circuits

Procurement Notes

Verify the 'T' suffix confirms the -55°C to +125°C temperature grade. Confirm package type Q-24 corresponds to Cerdip as per the ordering guide. Ensure power supply tolerances match the ±5% requirement for B and T versions specified in the datasheet notes.

Selection Notes

Select this model over the AN/AR variants if operation above +85°C is required. Choose AD7237A over AD7247A when interfacing with 8-bit microprocessors requiring double-buffered input latches. Verify that the 24-pin Cerdip (Q) package fits the PCB footprint constraints compared to DIP or SOIC options.

Part Context

This component is part of the enhanced AD7237A/AD7247A series, improving upon the original industry-standard parts with faster interface times and wider supply voltage ranges. The AD7237A specifically uses an 8+4 bit loading structure, distinguishing it from the full 12-bit parallel load of the AD7247A.

Replacement Considerations

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