The SP574B/674B/1674B/774B (SPx74B) Series are complete 12-bit successive-approximation A/D converters integrated on a single die with tri-state output latches, an internal reference, clock and a sample-hold.
The SP574B/674B/1674B/774B series are complete 12‑bit successive‑approximation A/D converters that integrate sample‑hold, reference, clock and tri‑state outputs on a single die. They provide true Nyquist sampling at rates up to 125 kHz and are drop‑in replacements for earlier 574A/674A/1674A/774A devices.
The document lists absolute maximum ratings, detailed electrical specifications, pin assignments, circuit operation, sample‑and‑hold behavior, calibration procedures, and ordering information for the various temperature‑grade models (commercial, industrial, military).
| Resolution | 12 Bits |
|---|---|
| Input Voltage Ranges | Bipolar +5 V, +10 V; Unipolar 0‑10 V, 0‑20 V |
| Power Dissipation (SP574B/SP674B) | 110 mW |
| 12‑Bit Conversion Time (SP574B) | 13‑25 µs |
| 12‑Bit Conversion Time (SP674B) | 9‑15 µs |
| Nyquist Frequency (SP574B) | 20 kHz |
The converters support bipolar ranges of +5 V and +10 V, and unipolar ranges of 0‑10 V or 0‑20 V.