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MAX146：+2.7V、低功耗、8通道、串行12位ADC

The MAX146/MAX147 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 MAX147 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/MAX147 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 MAX147 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/MAX147 are available in 20-pin DIP and SSOP packages. For 4-channel versions of these devices, see the MAX1246/MAX1247 data sheet.

关键特性 8-Channel Single-Ended or 4-Channel Differential Inputs Single-Supply Operation +2.7V to +3.6V (MAX146) +2.7V to +5.25V (MAX147) Internal 2.5V Reference (MAX146) 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 DIP/SSOP Packages

MAX146、MAX147：典型工作电路 应用 电池供电应用 数据采集 医疗仪器 笔输入量化器 便携式数据记录 过程控制

数据手册DataSheet

关键参数

开发工具

• MAX146EVKIT
• MAX147EVKIT

技术资料

• Understanding Single-Ended, Pseudo-Differential and Fully-Differential ADC Inputs

质量和环境数据

• MAX146.pdf

相关产品

• MAX11637：12位、300ksps ADC，带有差分采样/保持和内部基准
• MAX11629：12位、300ksps ADC，带有FIFO和内部电压基准
• MAX144：+2.7V、低功耗、2通道、108ksps、串行12位ADC，8引脚µMAX封装
• MAX1246：+2.7V、低功耗、4通道、串行12位ADC，QSOP-16封装

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