The TC14433/A is an analog-to-digital converter chip produced by Microchip Technology Inc. It has an accuracy of ±0.05%, two voltage ranges of 1.999V and 199.9 mV, a conversion speed of up to 25 times/second, an input resistance of more than 1000M ohms, a single positive voltage reference, auto-polarity and auto-zero calibration functions, support for overvoltage and undervoltage signals, and can operate in auto-ranging circuits. It can be used in portable instruments, digital multimeters, digital panel meters, digital scales, digital thermometers, remote A/D sensing systems and MPU systems.
The TC14433/A is a 3‑1/2‑digit analog‑to‑digital converter implemented in a monolithic CMOS process. It combines analog and digital circuitry on a single IC, minimizing external components and providing auto‑zero and auto‑polarity functions. The device operates from a wide supply range and offers two selectable full‑scale voltage ranges (1.999 V and 199.9 mV).
Key features include an accuracy of ±0.05 % of reading ±1 count, up to 25 conversions per second, low power consumption (typical 4 mW), and a selectable clock source. The converter is available in several packages (24‑Pin PDIP, 24‑Pin CERDIP, 24‑Pin SOIC, 28‑Pin PLCC) and supports a supply voltage range of +4.5 V to +8 V.
| Accuracy | ±0.05 % of reading ±1 count |
|---|---|
| Full‑scale Voltage Ranges | 1.999 V and 199.9 mV |
| Maximum Conversion Rate | Up to 25 conversions per second |
| Supply Voltage Range | +4.5 V to +8 V |
| Input Impedance | > 1000 MΩ |
| Typical Power Consumption | 4 mW |
| Clock Frequency | 66 kHz |
| Available Packages | 24‑Pin PDIP, 24‑Pin CERDIP, 24‑Pin SOIC, 28‑Pin PLCC |
It supports two full‑scale voltage ranges: 1.999 V and 199.9 mV.
Typical power consumption is about 4 mW.
The device is offered in 24‑Pin PDIP, 24‑Pin CERDIP, 24‑Pin SOIC (TC14433 only) and 28‑Pin PLCC packages.
The converter operates from +4.5 V up to +8 V.