The ADS1100 is a precision, continuously self-calibrating Analog-to-Digital (A/D) converter with differential inputs and up to 16 bits of resolution in a small SOT23-6 package. Conversions are performed ratiometrically, using the power supply as the reference voltage. The ADS1100 uses an I2C-compatible serial interface and operates from a single power supply ranging from 2.7V to 5.5V. The ADS1100 can perform conversions at rates of 8, 16, 32, or 128 samples per second. It also features a programmable gain amplifier and low power consumption, making it suitable for applications requiring high-resolution measurement.
The ADS1100 is a precision, continuously self‑calibrating 16‑bit ADC offered in a tiny SOT23‑6 package. It features a programmable gain amplifier (gain = 1, 2, 4, 8), selectable data rates from 8 SPS to 128 SPS, and operates from a 2.7 V to 5.5 V supply while consuming as little as 90 µA in active mode. The device uses a standard I²C interface and provides eight possible factory‑programmed addresses.
Typical applications include portable instrumentation, industrial process control, smart transmitters, and temperature measurement. The datasheet details absolute maximum ratings, electrical characteristics, pin configuration, and mechanical dimensions, as well as guidelines for input filtering, aliasing prevention, and power‑up/reset behavior.
| Resolution | 16 bits |
|---|---|
| Power‑supply voltage | 2.7 V to 5.5 V |
| Programmable gain | 1, 2, 4, 8 |
| Active‑mode supply current | 90 µA (typical) |
| Low‑current consumption | 90 µA |
| Common‑mode input impedance | 8 MΩ |
The ADS1100 uses an I²C address of the form 1001aaa, giving eight possible addresses such as 1001000 for the A0 variant and 1001011 for the A3 variant.
The device includes a self‑calibration circuit that operates continuously and cannot be deactivated, ensuring gain and offset errors are compensated automatically.
The ADS1100 operates from a single supply ranging from 2.7 V to 5.5 V.