The AD1674 is a complete, multipurpose, 12-bit analog-to-digital converter, consisting of a user-transparent onboard sample-and-hold amplifier (SHA), 10 volt reference, clock and three-state output buffers for microprocessor interface. The AD1674 is pin compatible with the industry standard AD574A and AD674A, but includes a sampling function.
The AD1674 is a complete, multipurpose 12‑bit ADC that includes an on‑board sample‑and‑hold amplifier, a 10 V reference, and three‑state output buffers for direct microprocessor interfacing. It supports unipolar (0‑10 V, 0‑20 V) and bipolar (‑5‑5 V, ‑10‑10 V) input ranges and operates from ±12 V or ±15 V supplies.
The datasheet provides extensive DC, AC, and digital specifications, ordering information for various temperature grades and package types, pin descriptions, timing diagrams, and absolute maximum ratings. It also defines key performance metrics such as INL, DNL, S/N+D ratio, THD, and bandwidth.
| Resolution | 12 bits |
|---|---|
| Integral Nonlinearity (INL) | ±1 LSB (typical ±0.5 LSB) |
| Differential Nonlinearity (DNL) | No missing codes (12‑bit) |
| Power‑Supply Rejection (VCC) | 15 V ±1.5 V or 12 V ±0.6 V |
| Operating Temperature (T‑grade) | ‑55 °C to +125 °C |
The AD1674 provides a 12‑bit resolution.
VCC can be 15 V ± 1.5 V or 12 V ± 0.6 V, VLOGIC is 5 V ± 0.5 V, and VEE is –15 V ± 1.5 V or –12 V ± 0.6 V.