12-bit µA-compatible AD converters, 10 S/s, DIP-40

TC7109
12-Bit + Sign Integrating µA-Compatible Analog-to-Digital Converters

Description:
The TC7109 is a 12-bit plus sign, CMOS low-power analog-to-digital converter (ADC). Only eight passive components and a crystal are required to form a complete dual-slope integrating ADC. The improved Voh source current TC7109 has features that make it an attractive per-channel alternative to analog multiplexing for many data acquisition applications. These features include typical input bias current of 1pA, drift of less than 1 µV/°C, input noise typically 15 µVp-p, and auto-zero. True differential input and reference allow measurement of bridge-type transducers such as load cells, strain gauges, and temperature transducers. In the handshake mode, the TC7109 will operate with industry-standard UARTs in controlling serial data transmission - ideal for remote data logging.

Features:
- Zero Integrator Cycle for Fast Recovery from Input Overloads
- Eliminates Cross-Talk in Multiplexed Systems
- 12-Bit Plus Sign Integrating A/D Converter with Over Range Indication
- Sign Magnitude Coding Format
- True Differential Signal Input and Differential Reference Input
- Low Noise: 15µVp-p Typ.
- Input Current: 1pA Typ.
- No Zero Adjustment needed
- TTL Compatible, Byte Organized Tri-State Outputs
- UART Handshake Mode for simple Serial Data Transmissions