AD5666 is a low power quad 16-bit DAC chip with a 5 ppm/°C on-chip reference voltage. It is suitable for applications such as process control, data acquisition systems, portable battery-powered instruments, digital gain and offset adjustment, programmable voltage and current sources, and programmable attenuators.
The AD5666 is a quad, 16‑bit, buffered voltage‑output DAC that operates from a single 2.7 V to 5.5 V supply. It features an on‑chip 1.25 V or 2.5 V reference with 5 ppm/°C temperature coefficient and supports both synchronous and asynchronous LDAC updates. The device includes hardware LDAC and CLR functions, daisy‑chain capability, and a versatile 3‑wire serial interface compatible with SPI, QSPI, MICROWIRE and DSP standards.
The datasheet provides detailed specifications, timing diagrams, absolute maximum ratings, and layout recommendations for optimal performance. It also includes an ordering guide with package options and part numbers for the AD5666 family.
| Resolution | 16 bits |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V |
| Power‑down Current (5 V) | 400 nA |
| On‑chip Reference Voltage | 1.25 V or 2.5 V |
| Reference Temperature Coefficient | 5 ppm/°C |
| Output Impedance | 0.5 Ω |
| Maximum SCLK Frequency | 50 MHz |
The AD5666 operates from a single supply of 2.7 V to 5.5 V.
It is a quad DAC, providing four independent output channels.
When powered down, the device typically consumes 400 nA at 5 V.
The on‑chip reference can be set to 1.25 V or 2.5 V, both with a 5 ppm/°C temperature coefficient.