TC7109屬于集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）。由美國微芯科技公司制造生產(chǎn)的TC7109模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) D）對模擬信號進行采樣，例如由麥克風采集的聲音或傳感器的輸出，然后將其轉(zhuǎn)換為數(shù)字信號。一般來說，數(shù)字輸出是二進制補碼二進制數(shù)，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數(shù)轉(zhuǎn)換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉(zhuǎn)換器數(shù)和架構(gòu)（例如自適應(yīng)增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進行選擇。

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