AD7237JRZ-REEL

Overview

The AD7237JRZ-REEL is a dual 12-bit voltage-output digital-to-analog converter (DAC) from the DACPORT family, fabricated in LC2MOS technology. It integrates two independent DACs with on-chip voltage reference and output amplifiers on a single monolithic CMOS chip. The device features a parallel loading structure with an 8-bit wide data bus and double-buffered interface for microprocessor compatibility. Key electrical specifications include a settling time of 8 µs to within ±1/2 LSB, a typical power dissipation of 165 mW in single-supply mode, and operation from +10.8 V to +16.5 V supplies. It is packaged in a 24-lead Small Outline Integrated Circuit (SOIC) format.

Feature Summary

• Dual 12-bit resolution with integrated 5 V Zener voltage reference and buffered output amplifiers
• Parallel interface with double-buffered input latches (8+4 bit structure) for 8-bit microprocessor systems
• Settling time of 8 µs max and differential nonlinearity of ±0.9 LSB max
• Flexible supply operation: Single (+12 V to +15 V) or Dual (±12 V to ±15 V) configurations

Applications

• Industrial process control systems requiring precise analog signal generation
• Microprocessor-based instrumentation and data acquisition systems
• Programmable power supplies and waveform generators

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm that the 'J' grade corresponds to the industrial temperature range (-40°C to +85°C) as defined in the manufacturer's ordering guide. Ensure ESD precautions are observed during handling due to the CMOS construction.

Selection Notes

Select this model for applications requiring direct interfacing with 8-bit microprocessors via the double-buffered latch structure. Choose the SOIC package for surface-mount assembly requirements. Verify that the required output voltage ranges (0–5 V, 0–10 V, or ±5 V) can be achieved using the onboard offset resistors and appropriate supply voltages.

Part Context

This component belongs to the AD7237A/AD7247A series, which represents an enhanced version of the industry-standard AD7237/AD7247. Improvements include extended supply voltage operation down to 12 V, faster interface setup times, and improved reference stability. The 'JRZ' designation identifies the J-grade temperature range, R-package (SOIC), and RoHS compliance.

Replacement Considerations

The AD7237ABRZ is a direct pin-compatible replacement offering higher accuracy (±1/2 LSB relative accuracy). For applications requiring 16-bit parallel interfaces, the AD7247A series provides a compatible alternative with different latch structures.