The AD7849 is a 14-bit/16-bit serial input multiplying digital-to-analog converter (DAC). The DAC architecture ensures excellent differential linearity and low output noise. The device has a programmable gain factor, which is 2**10 or 2**12 in 10-bit or 12-bit mode, respectively. The AD7849 has an on-chip reference voltage source and internal error correction for high accuracy.
The AD7849 is a serial‑input multiplying digital‑to‑analog converter offering 14‑bit resolution for the A version and 16‑bit for B and C versions. It provides guaranteed monotonicity, output control on power‑up and power‑down, and a flexible three‑line serial interface suitable for opto‑isolated applications.\n\nKey features include a wide supply range (VDD 14.25‑15.75 V, VSS –14.25‑–15.75 V), output swing from VSS+4 V to VDD‑4 V, low output resistance (0.3 Ω typ), and support for both unipolar and bipolar output ranges. The device is available in 20‑lead PDIP and 20‑lead SOIC packages.
| Resolution | 14‑bit (A version) / 16‑bit (B & C versions) |
|---|---|
| Supply Voltage (VDD) | 14.25 V to 15.75 V |
| Output Voltage Swing | VSS+4 V to VDD‑4 V |
| Power Dissipation | 100 mW typical |
The AD7849 provides 14‑bit resolution for the A version and 16‑bit resolution for the B and C versions.
The device requires VDD 14.25 V to 15.75 V, VSS –14.25 V to –15.75 V, and VCC 4.75 V to 5.25 V.