The MAX187/MAX189 are 12-bit serial analog-to-digital converters (ADCs) from Texas Instruments with 8.5µs sampling rate and 75ksps throughput rate. They support SPI™, QSPI™ and Microwire™ interface.
The MAX187 and MAX189 are 12‑bit analog‑to‑digital converters that operate from a single +5 V supply and provide a fast 8.5 µs successive‑approximation conversion. They feature an internal buffered reference (MAX187) or external reference (MAX189), a 3‑wire serial interface compatible with SPI, QSPI, and Microwire, and low power consumption (7.5 mW operating, 2 µA shutdown).
These converters are suited for portable data‑logging, remote DSP, isolated data acquisition, and high‑accuracy process‑control applications where space and power are critical. They are offered in 8‑pin DIP and 16‑pin SO packages.
| Resolution | 12 bits |
|---|---|
| Sampling Rate | 75 ksps |
| Operating Power Consumption | 7.5 mW |
| Shutdown Current | 2 µA |
| Supply Voltage | 4.75 V – 5.25 V |
| Reference Voltage (MAX187) | 4.096 V (internal) |
| Package Options | 8‑Pin DIP, 16‑Pin SO |
The devices provide a 75 ksps sampling rate.
Shutdown current is as low as 2 µA.
The ADC operates from 4.75 V to 5.25 V.
Both parts have a 12‑bit resolution.