The MAX148/MAX149 10-bit data-acquisition systems combine an 8-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and low power consumption. They operate from a single +2.7V to +5.25V supply, and sample to 133ksps. Both devices’ analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation. The 4-wire serial interface connects directly to SPI/QSPI™ and MICROWIRE™ devices without external logic. A serial-strobe output allows direct connection to TMS320-family digital signal processors. The MAX148/MAX149 use either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions. The MAX149 has an internal 2.5V reference, while the MAX148 requires an external reference. Both parts have a reference-buffer amplifier with a ±1.5% voltage-adjustment range. These devices provide a hard-wired active-low SHDN pin and a software-selectable power-down, and can be programmed to automatically shut down at the end of a conversion. Accessing the serial interface automatically powers up the MAX148/MAX149, and the quick turn-on time allows them to be shut down between all conversions. This technique can cut supply current to under 60µA at reduced sampling rates. The MAX148/MAX149 are available in 20-pin PDIP and 20-pin SSOP packages. For 4-channel versions of these devices, see the MAX1248/MAX1249 data sheet. Applications * Battery-Powered Instruments * Data Acquisition * Medical Instruments * Pen Digitizers * Portable Data Logging * Process Control * 8-Channel Single-Ended or 4-Channel Differential Inputs * Single-Supply Operation: +2.7V to +5.25V * Internal 2.5V Reference (MAX149) * Low Power: * 1.2mA (133ksps, 3V Supply) * 54µA (1ksps, 3V Supply) * 1µA (Power-Down Mode) * SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface * Software-Configurable Unipolar or Bipolar Inputs * 20-Pin PDIP/SSOP Packages https://elecena.pl/product/22315805/2-7v-to-5-25v-low-power-8-channel-serial-10-bit-adcs 2022-12-27 https://elecena.pl/product/22315805/2-7v-to-5-25v-low-power-8-channel-serial-10-bit-adcs 2025-01-20