The AD5678 is a low-power, octal DAC with on-chip reference in a 14-lead/16-lead TSSOP package. The AD5678 features three power-down functions, hardware LDAC and LDAC override function, CLR function to programmable code, and rail-to-rail operation. The AD5678 is suitable for applications such as process control, data acquisition systems, portable battery-powered instruments, digital gain and offset adjustment, programmable voltage current sources, and programmable attenuators.
The AD5678 is an octal voltage‑output DAC that integrates four 12‑bit and four 16‑bit converters in a single 14‑lead/16‑lead TSSOP package. It operates from a single 2.7 V to 5.5 V supply, provides an on‑chip 1.25 V or 2.5 V reference with 5 ppm/°C temperature coefficient, and features power‑down modes that reduce current consumption to the sub‑µA range.
The device offers a versatile 3‑wire serial interface compatible with SPI, QSPI, MICROWIRE and DSP standards, supports up to 50 MHz clock rates, and includes hardware LDAC and asynchronous CLR functions for simultaneous channel updates. Detailed specifications, pin descriptions, timing diagrams and layout recommendations are provided for designers.
| Supply Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Power‑down Current | 200 nA at 3 V, 400 nA at 5 V |
| On‑chip Reference | 1.25 V or 2.5 V, 5 ppm/°C |
| Maximum Serial Clock Frequency | 50 MHz |
| Operating Temperature Range | ‑40 °C to +105 °C |
The device consumes about 200 nA at 3 V and 400 nA at 5 V when powered down.
The serial interface can operate up to 50 MHz.
The device is rated for operation from –40 °C to +105 °C.