GENERAL DESCRIPTION

The TC7109A 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 TC7109A 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 1µV/°C, input noise typically 15µVP-P, and auto-zero. True differential input and reference allow measurement of bridge-type transducers such as load cells, strain gauges, and temperature transducers.

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 Overrange Indication

■ Sign Magnitude Coding Format

■ True Differential Signal Input and Differential Reference Input

■ Low Noise ............................................ 15 µVP-P Typ

■ Input Current .............................................. 1 pA Typ

■ No Zero Adjustment Needed

■ TTL-Compatible, Byte-Organized Tri-State Outputs

■ UART Handshake Mode for Simple Serial Data Transmission

TC7109IJL属于集成电路（IC） > 模数转换器（ADC）。微芯科技股份有限公司制造生产的TC7109IJL模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。