Download Datasheets TC7109A Device 
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Home - Analog & Interface Products - Mixed Signal Devices - Dual Slope - TC7109A Device, download datasheet

Download Datasheets TC7109A Device

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 1 V/C, input noise typically 15 VPP,and auto-zero. True differential input and reference allow measurement of bridge-type transducers such as load cells,strain gauges,and temperature transducers. The TC7109A provides a versatile digital interface. In the direct mode,chip select and HIGH/LOW byte enables control parallel bus interface.In the handshake mode, the TC7109A will operate with industry-standard UARTs in controlling serial data transmission ideal for remote data logging.Control and monitoring of conversion timing is provided by the RUN/HOLD input and STATUS output. For applications requiring more resolution, see the TC500,15-bit plus sign ADC data sheet. The TC7109A has improved overrange recovery performance and higher output drive capability than the original TC7109.All new (or existing)designs should specify the TC7109A wherever possible.

Datasheet and Other Documentation

Detailed Content

Lit. Number



TC7109/A Datasheet


Download TC7109/A Datasheet


In Production

Specification Chart

Supply Voltage (V)

Input Voltage Range (V)


Sampling Rate (Conv/s)

Input Channels

Data Interface

4.5 to 7.5

V SS to V DD

12 bits plus sign bits




Additional 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 15mVP-P Typ.
Input Current 1pA Typ.
No Zero Adjustment Needed
TTL-Compatible, Byte-Organized Tri-State Outputs
UART Handshake Mode for Simple Serial Data Transmission

Package Options

40 PDIP(P), 40 CERDIP(JW), 44 PQFP(QF), 44 PLCC(L), 2008-2015 - download datasheets