12-bit plus sign integrating A/D converter with overrange indication, low noise, 1pA input current, no zero adjustment needed, TTL-compatible, byte-organized tri-state outputs, UART handshake mode.
The TC7109 and TC7109A are 12‑bit plus‑sign CMOS analog‑to‑digital converters with low‑noise performance (15 µVp‑p typ) and ultra‑low input bias current (1 pA typ). They feature true differential inputs, overrange indication, and a versatile digital interface that supports both direct parallel bus and UART handshake modes.
The device is offered in several package types (44‑pin PQFP, 44‑pin PLCC, 40‑pin Plastic DIP, 40‑pin CerDIP) covering a wide temperature range, and operates from +6.2 V to –9 V supply voltages. Detailed pin descriptions, electrical characteristics, and handling precautions are included for designers.
| Resolution | 12‑bit plus sign |
|---|---|
| Input Noise | 15 µVp‑p typ |
| Input Current | 1 pA typ |
| Supply Voltage Range | +6.2 V to –9 V |
| Package Options | 44‑pin PQFP, 44‑pin PLCC, 40‑pin Plastic DIP, 40‑pin CerDIP |
| Power Dissipation (CerDIP) | 2.29 W |
The input noise is typically 15 µVp‑p.
It operates from +6.2 V to –9 V.
Available in 44‑pin PQFP, 44‑pin PLCC, 40‑pin Plastic DIP, and 40‑pin CerDIP.