TC7126/A is a 3-1/2 digit CMOS analog-to-digital converter (ADC) with features including internal reference with low temperature drift, zero reading with zero input, low noise, high resolution, low input leakage current, precision null detectors, high-impedance differential input, and convenient 9V battery operation. It is suitable for applications such as thermometry, bridge readouts, digital meters, and panel meters.
The TC7126/A is a 3‑1⁄2‑digit analog‑to‑digital converter that integrates a precision voltage reference, LCD driver, and backplane driver on a single CMOS chip. It offers low noise (15 µVp‑p), high resolution (0.05 %), and ultra‑low input leakage (1 pA typ., 10 pA max.) for accurate measurements in portable applications.
Typical applications include thermometry, bridge readouts for strain gauges and load cells, and digital or panel meters for voltage, current, resistance, power, pH, and process monitoring. The device operates from a 9 V battery with a typical power dissipation of 500 µW and supports a conversion rate up to 16 kHz.
| Resolution | 0.05 % |
|---|---|
| Noise | 15 µVp‑p |
| Input Leakage Current | 1 pA typ., 10 pA max. |
| Power Dissipation | 500 µW typ., 900 µW max. |
| Reference Temperature Drift (TG7126A) | 35 ppm/°C typical |
| Supply Voltage | +9 V |
| Conversion Rate | 16 kHz |
Typical power dissipation is 500 µW, with a maximum of 900 µW.
The input leakage current is specified as 1 pA typical and 10 pA maximum.
The device operates from a +9 V supply.
The TG7126A version has a temperature drift of 35 ppm/°C typical.