Maxim MAX14775EASA+

ТрансиверRS422, RS48520 Мбит/с

Overview

The MAX146/MAX14775EASA+ 12-bit data-acquisition systems combine an 8-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and low power consumption. The MAX146 operates from a single +2.7V to +3.6V supply; the MAX14775EASA+ operates from a single +2.7V to +5.25V supply. 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 MAX146/MAX14775EASA+ use either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions. The MAX146 has an internal 2.5V reference, while the MAX14775EASA+ requires an external reference. Both parts have a reference-buffer amplifier with a ±1.5% voltage-adjustment range. These devices provide a hard-wired SHDN-bar 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 MAX146/MAX147, 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 MAX146/MAX14775EASA+ are available in 20-pin DIP and SSOP packages. For 4-channel versions of these devices, see the MAX1246/MAX1247 data sheet.

Features

Applications

• Desktop PC
• Notebook
• Pocket PC
• Desktop radio
• Clock radio
• Tuner
• Portable radio
• Car radio
• Satellite radio receiver
• Shortwave receiver