AD568 is a precision, monolithic, 12-bit, ultrahigh-speed D/A converter (DAC) with high output current stability and low harmonic distortion, which is suitable for video processing, measurement instruments, medical electronics and other applications
The AD568 is an ultrahigh‑speed 12‑bit digital‑to‑analog converter (DAC) fabricated in Analog Devices’ Complementary Bipolar (CB) process. It offers a 35 ns settling time to 0.025 % of full scale, a 10.24 mA full‑scale current output, and high‑stability buried‑Zener reference. The device is available in 0.3 " Cerdip packages and in MIL‑STD‑883 compliant grades for rugged applications.
The DAC can be configured for unbuffered current or voltage output, as well as buffered voltage output using an external op‑amp such as the AD840. It supports TTL and CMOS logic levels, provides programmable gain and offset trimming, and includes proprietary ESD protection circuitry. Detailed specifications, absolute maximum ratings, and application notes are provided in the following sections.
| Resolution | 12 bits |
|---|---|
| Full‑scale current output | 10.24 mA |
| Output resistance | 100 Ω ±1 % |
| Current settling time (0.025 % FS) | 35 ns |
| Power supply range | +13.5 V to +16.5 V |
| Gain temperature coefficient | 30 ppm/°C max |
| Compliance voltage | -2 V to +12 V |
| Power dissipation | 525 mW (typ.) |
The AD568 settles to 0.025 % of full scale in 35 ns.
The device includes proprietary ESD protection circuitry, and proper handling precautions are recommended to avoid damage.
The digital input threshold is set at 1.4 V and does not vary with supply voltage.