The AD670 is a low cost 8-bit signal conditioning A/D converter with microprocessor bus interface, 10 �s conversion speed, flexible input stage, no user trims, no missing codes over temperature, single +5 V supply operation, convenient input ranges, 20-pin DIP or surface-mount package, low cost monolithic construction and MIL-STD-883B compliant versions available.
The AD670 is a complete 8‑bit signal‑conditioning analog‑to‑digital converter that includes an instrumentation‑amp front end, SAR logic, and three‑state output buffer. It operates from a single +5 V supply and provides differential inputs with high common‑mode rejection, allowing direct connection to a variety of transducers.
The device offers four input ranges (0‑255 mV, 0‑2.55 V, and bipolar equivalents) selectable via internal scaling resistors and the BPO/UPO pin. Output coding (straight binary, offset binary, or two's‑complement) is chosen with the FORMAT pin, and conversion is initiated by standard microprocessor control signals (RW, CS, CE).
The conversion time of the AD670 is 10 µs.
Input ranges are selected by internal scaling resistors and the BPO/UPO pin, providing low‑range (0‑255 mV) and high‑range (0‑2.55 V) options for both unipolar and bipolar configurations.
Yes, the AD670 can be configured for bipolar inputs and provides differential inputs with excellent common‑mode rejection.