AD7237ABRZ

Overview

The AD7237ABRZ is a dual 12-bit voltage-output digital-to-analog converter (DAC) from the DACPORT family, manufactured by Analog Devices Inc. It integrates two independent DACs with on-chip output amplifiers and a Zener voltage reference on a monolithic CMOS chip. The device features an 8-bit wide parallel data interface with double-buffered input latches for microprocessor compatibility. It operates from single or dual power supplies ranging from ±10.8 V to ±16.5 V. Key performance specifications include a typical settling time of 8 µs, a maximum relative accuracy of ±0.5 LSB, and a maximum differential nonlinearity of ±0.9 LSB. The component is housed in a 24-lead Small Outline Integrated Circuit (SOIC) package.

Feature Summary

• Dual 12-bit architecture with integrated buffered output amplifiers and internal 5 V reference
• Double-buffered parallel interface compatible with 8-bit microprocessor buses
• Configurable unipolar (0–5 V, 0–10 V) and bipolar (±5 V) output ranges via ROFS pins
• High-speed operation with 8 µs typical settling time and 30 ns data setup time

Applications

• Industrial process control systems requiring multi-channel signal generation
• Programmable power supply designs utilizing direct microprocessor interfacing
• Test and measurement equipment needing precise analog voltage outputs

Procurement Notes

Verify that the ordering suffix 'BRZ' corresponds to the SOIC package and lead-free RoHS compliance as specified in the manufacturer's ordering guide. Confirm the temperature grade 'B' indicates the industrial range of -40°C to +85°C. Ensure the specific revision of the datasheet matches the production lot requirements for absolute maximum ratings and electrical characteristics.

Selection Notes

Select the AD7237ABRZ when an 8-bit microprocessor interface is required, as it utilizes a double-buffered structure unlike the single-latch AD7247A variant. Choose this part if dual isolated channels are needed within a single package footprint. Verify that the required output current capability meets the amplifier's specification of developing +10 V across a 2 kΩ load to ground.

Part Context

The AD7237ABRZ belongs to the enhanced AD7237A/AD7247A series, which improves upon previous industry standards with faster interface times and wider supply voltage tolerance. It is part of the DACPORT family, designed to replace multi-chip solutions with a single monolithic CMOS device. The 'BRZ' suffix denotes the surface-mount SOIC package option with lead-free termination.

Replacement Considerations

The AD7237ABR is the non-RoHS compliant predecessor to the AD7237ABRZ. Both share identical pinouts and electrical specifications; the primary difference is the environmental compliance of the packaging materials.