AD7237KR

Overview

The AD7237KR is a dual 12-bit Digital-to-Analog Converter (DAC) from the DACPORT family, manufactured by Analog Devices Inc. It integrates two CMOS DACs with on-chip voltage reference and output amplifiers on a single LC2MOS monolithic chip. The device supports parallel word input loading and operates with supply voltages ranging from +10.8 V to +16.5 V for VDD and -10.8 V to -16.5 V for VSS. Key electrical specifications include a maximum settling time of 10 µs, a typical glitch impulse of 30 nV-sec, and an absolute accuracy of ±1 LSB. It is housed in a 24-pin Small Outline Integrated Circuit (SOIC) package.

Feature Summary

• Dual 12-bit resolution with integrated 5 V Zener reference and buffered output amplifiers
• Parallel interface structure with asynchronous LDAC signal for simultaneous channel updates
• Configurable output ranges: 0 V to +5 V, 0 V to +10 V (unipolar), and ±5 V (bipolar)
• LC2MOS fabrication process combining precision bipolar circuits with low-power CMOS logic

Applications

• Microprocessor-based data acquisition systems requiring direct interfacing
• Industrial control loops utilizing 8-bit or 16-bit bus architectures
• Programmable power supplies and signal generators

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm the specific suffix 'KR' corresponds to the SOIC package and industrial temperature range (-40°C to +85°C). Check for RoHS compliance status and ensure handling precautions are observed due to electrostatic discharge sensitivity.

Selection Notes

Select the AD7237KR when a dual-channel solution is required to save board space compared to discrete multi-chip designs. Ensure the application utilizes parallel data buses compatible with the 8+4 bit loading structure. Verify that the supply voltage requirements fall within the specified ±10.8 V to ±16.5 V range for optimal performance.

Part Context

The AD7237KR belongs to the enhanced AD7237A/AD7247A series, which improves upon the industry-standard AD7237/AD7247 models. This generation offers faster interface times, improved reference variations with supply voltage, and extended operating voltage ranges. The KR suffix specifically denotes the SOIC package variant within this product line.

Replacement Considerations

The AD7237ABRZ is listed as a direct replacement for the AD7237KR. Both parts share identical functional specifications, pinouts, and package types (24-SOIC). Users should verify that the replacement part meets any specific environmental or qualification requirements previously mandated by the obsolete component.