AD5694ARUZ

Overview

The AD5694ARUZ is a quad, 12-bit buffered voltage output Digital-to-Analog Converter (DAC) from the nanoDAC+ family by Analog Devices. It operates on a single 2.7 V to 5.5 V supply and features a 2-wire I2C-compatible serial interface supporting clock rates up to 400 kHz. The device includes four independent DAC channels with rail-to-rail output amplifiers capable of driving loads up to 1 kΩ or 2 nF. Key specifications include a maximum Integral Nonlinearity (INL) of ±1 LSB for A grade, a total unadjusted error (TUE) of ±0.1% of Full Scale Range (FSR), and low power consumption of 1.8 mW at 3 V. It offers user-selectable gain settings of 1 or 2 via the GAIN pin.

Feature Summary

• Quad 12-bit resolution with high relative accuracy (±1 LSB INL max for A grade).
• I2C-compatible 2-wire serial interface with 400 kHz clock rate and 4 selectable slave addresses.
• User-selectable gain of 1 (0 V to VREF) or 2 (0 V to 2 × VREF) via hardware pin.
• Power-on reset circuit with RSTSEL pin option to initialize outputs to zero scale or midscale.

Applications

• Programmable attenuators
• Digital gain and offset adjustment circuits
• Process control I/O cards and PLCs
• Industrial automation systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current data sheet to confirm package type and tape/reel configuration. Ensure compatibility with system voltage levels, as the logic supply (VLOGIC) ranges from 1.62 V to 5.5 V while the analog supply (VDD) requires 2.7 V to 5.5 V. Confirm thermal management requirements for the TSSOP-16 package if operating near the upper temperature limits.

Selection Notes

Select the AD5694ARUZ when 12-bit resolution is sufficient for the application, offering lower cost compared to the 16-bit AD5696 variant. Choose this model over external reference designs if integrated precision is required, noting that an external VREF must still be supplied. Consider the TSSOP-16 package for through-hole or standard surface mount assembly processes requiring wider pitch than LFCSP options.

Part Context

The AD5694ARUZ belongs to the nanoDAC+ family, which also includes the 16-bit AD5696 and other variants like the AD5695R. These devices share similar architectural features, including the I2C interface and power-down modes, but differ in resolution and internal reference configurations. The 'A' grade denotes tighter accuracy specifications compared to the 'B' grade.

Replacement Considerations

The AD5694ARUZ is functionally compatible with the AD5694ARUZ-R7 for reel packaging variations. For applications requiring higher resolution, the AD5696ARUZ serves as a direct pin-compatible upgrade within the same package. If an internal reference is preferred, consider the AD5694RARUZ series, though verification of pinout and register compatibility is required.