AD5665BRUZ-REEL7

Overview

The AD5665BRUZ-REEL7 is a quad, 16-bit buffered voltage-output digital-to-analog converter (DAC) from the nanoDAC family. It operates on a single 2.7 V to 5.5 V supply and features an I2C-compatible serial interface supporting standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes. The device includes an on-chip 2.5 V reference with 5 ppm/°C temperature coefficient in the TSSOP package, enabling a full-scale output range of 5 V. It guarantees monotonicity by design and incorporates power-on reset logic to initialize outputs to zero scale or midscale.

Feature Summary

• Quad-channel 16-bit resolution with rail-to-rail buffered voltage outputs
• Integrated 2.5 V, 5 ppm/°C on-chip reference for TSSOP packages
• I2C-compatible serial interface with up to 3.4 MHz high-speed mode
• Per-channel power-down capability and hardware LDAC/CLR functions

Applications

• Process control systems
• Data acquisition systems
• Portable battery-powered instruments
• Digital gain and offset adjustment circuits
• Programmable voltage and current sources

Procurement Notes

Verify the specific grade (A or B) and suffix configuration against the manufacturer's ordering guide, as performance parameters like relative accuracy vary between grades. Confirm that the TSSOP-14 package variant contains the specified internal reference characteristics. Ensure compatibility with the target I2C bus voltage levels and clock speeds before integration.

Selection Notes

Select this component when four independent 16-bit voltage outputs are required in a compact form factor. The internal 2.5 V reference simplifies design by eliminating external precision references, provided the 5 V full-scale range meets system requirements. Consider the LFCSP variant if board space is more constrained than pin count. Verify that the I2C address configuration via ADDR pins does not conflict with other devices on the bus.

Part Context

This part belongs to the AD5625R/AD5645R/AD5665R series, which offers 12-, 14-, and 16-bit resolutions respectively. The 'B' suffix typically denotes the operating temperature grade, while 'RUZ' indicates the 14-lead TSSOP package. The '-REEL7' suffix specifies tape-and-reel packaging for automated assembly. Related devices include the SPI-interface AD5664R and dual-channel AD5627R.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD5645RBRUZ (14-bit) and AD5625RBRUZ (12-bit), though resolution differs. For SPI interfaces, the AD5664RBRUZ offers similar functionality but requires different control logic. Verify that any substitute maintains the required 16-bit linearity and I2C timing specifications.