AD7943BN

Overview

The AD7943BN is a 12-bit multiplying digital-to-analog converter (DAC) from Analog Devices, designed for single-supply operation. It features a serial interface with a 40 ns strobe pulsewidth and operates within a +5 V supply range (Normal Mode). The device guarantees ±0.5 LSB integral and differential nonlinearity across the industrial temperature range of -40°C to +85°C. Key electrical parameters include a typical power dissipation of 5 mW, a settling time of 600 ns to 0.01%, and a glitch impulse of 60 nV-s. It is housed in a 16-lead Plastic DIP package.

Feature Summary

• 12-bit resolution with guaranteed ±0.5 LSB INL and DNL linearity
• Serial interface with 40 ns minimum strobe pulsewidth
• Low power consumption: typically 5 mW at +5 V supply
• Fast settling time of 600 ns to 0.01% full-scale range

Applications

• Battery-powered instrumentation
• Laptop computers
• Upgrades for legacy 754x series DAC designs

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. The 'BN' designation indicates a 16-lead Plastic DIP package with an industrial temperature range (-40°C to +85°C). Ensure compatibility with existing PCB footprints and soldering profiles for through-hole mounting.

Selection Notes

Select the AD7943BN when a serial interface is required for space-constrained or pin-count-limited designs compared to parallel alternatives like the AD7945. Choose this component over the AD7948 if byte-wide data handling is not necessary. Verify that the system can accommodate the external reference voltage requirements for normal mode operation.

Part Context

The AD7943 is part of the AD7943/AD7945/AD7948 family of fast 12-bit multiplying DACs. While the AD7945 offers a 12-bit parallel interface and the AD7948 provides an 8-bit byte interface, the AD7943 specifically utilizes a serial input structure. All three variants share similar performance characteristics regarding speed and power but differ in data loading mechanisms.

Replacement Considerations

The datasheet identifies the AD7543 as the industry-standard predecessor that the AD7943 replaces. Designers upgrading from the AD7543 should note the improved speed and lower power consumption while maintaining pin-out compatibility in many applications.