This data sheet introduces the AD5757, a quad, 16-bit, serial input, 4 mA to 20 mA output DAC with dynamic power control and HART connectivity.
The AD5757 is a quad, 16‑bit current‑output DAC that operates from a 10.8 V to 33 V supply and supports output ranges of 0 mA‑24 mA (including 0‑20 mA and 4‑20 mA). It features on‑chip dynamic power control, an on‑chip reference, and HART‑compatible CHART pins for process‑control networks.
The device uses a versatile 3‑wire serial interface compatible with SPI, QSPI, MICROWIRE, DSP and microcontroller standards, with optional CRC‑8 error checking and a watchdog timer. Detailed specifications, timing diagrams, pin descriptions and application notes are provided throughout the document.
| Output Current Range | 0 mA – 24 mA |
|---|---|
| Resolution | 16 Bits |
| Total Unadjusted Error (typical) | +0.009 % FSR |
| Supply Voltage Range | 10.8 V – 33 V |
| Operating Temperature Range | –40 °C to +105 °C |
The AD5757 can source 0 mA to 24 mA, with selectable sub‑ranges of 0‑20 mA and 4‑20 mA.
Yes, each channel has a CHART pin that allows HART signals to be coupled onto the current output.
It minimizes package power dissipation by regulating the output driver voltage from 7.4 V to 29.5 V using an on‑chip de‑to‑de boost converter.