AD7237JRZ

Overview

The AD7237JRZ is a dual 12-bit voltage-output digital-to-analog converter (DAC) from the DACPORT family, manufactured by Analog Devices. It integrates two CMOS DACs with on-chip voltage reference and output amplifiers in a 24-lead SOIC package. The device supports parallel loading via an 8+4 bit structure for microprocessor interfacing. Key electrical specifications include a resolution of 12 bits, a settling time of 8 µs to within ±1/2 LSB, and a typical power dissipation of 165 mW in single-supply mode. It operates with supply voltages ranging from +10.8 V to +16.5 V.

Feature Summary

• Dual 12-bit DAC architecture with integrated 5 V Zener reference and buffered output amplifiers.
• Parallel interface with double-buffered input latches (8-bit LSB and 4-bit MSB) for 8-bit microprocessor compatibility.
• Configurable output ranges: 0 V to +5 V, 0 V to +10 V (unipolar), and ±5 V (bipolar).
• High-speed data setup time of 30 ns typical and settling time of 8 µs max.

Applications

• Industrial process control systems requiring precise analog signal generation.
• Programmable gain amplifiers and variable voltage references.
• Waveform generation and test equipment interfaces.

Procurement Notes

Verify the specific suffix 'JRZ' against the manufacturer's current ordering guide to confirm package type (SOIC) and temperature range (Industrial -40°C to +85°C). Ensure that the lead time and availability status are checked with authorized distributors, as stock levels fluctuate. Confirm RoHS compliance details if required for specific manufacturing standards.

Selection Notes

Select the AD7237JRZ when an 8-bit microprocessor interface is preferred over the 12-bit direct load of the AD7247A variant. Choose this component for applications requiring simultaneous update capabilities via the LDAC pin. Ensure the system power supply accommodates the specified range of +10.8 V to +16.5 V and that the thermal management can handle up to 300 mW power dissipation in the SOIC-24 package.

Part Context

The AD7237JRZ belongs to the enhanced AD7237A/AD7247A series, which improves upon the original industry-standard parts with faster interface times and wider supply voltage operation. It is part of the DACPORT family, designed to replace multi-chip DAC solutions with a single monolithic CMOS chip. The 'J' indicates the industrial temperature grade, while 'RZ' denotes the SOIC package with RoHS compliance.

Replacement Considerations

The AD7237ABRZ is a direct replacement with potentially tighter accuracy specifications (±1/2 LSB vs ±1 LSB). For 12-bit parallel loading requirements, the AD7247A series offers a compatible alternative with a different interface structure. Verify pin compatibility and software timing adjustments when migrating between the 8+4 bit AD7237 and the 12-bit AD7247 architectures.