MAX1249 - +2.7V至+5.25V、低功耗、4通道、串行、10位ADC，QSOP-16封装

MAX1249是Maxim美信半导体公司的一款数据转换器和采样-保持电路产品，MAX1249是+2.7V至+5.25V、低功耗、4通道、串行、10位ADC，QSOP-16封装，本站介绍了MAX1249的封装应用图解、特点和优点、功能等，并给出了与MAX1249相关的Maxim元器件型号供参考。

MAX1249 - +2.7V至+5.25V、低功耗、4通道、串行、10位ADC，QSOP-16封装 - 数据转换器和采样-保持电路 - Maxim美信半导体高性能芯片品质 - 美信半导体

产品概述

The MAX1248/MAX1249 10-bit data-acquisition systems combine a 4-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 their 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 MAX1248/MAX1249 use either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions.

The MAX1248 has an internal 2.5V reference, while the MAX1249 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 theMAX1248/MAX1249, 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 MAX1248/MAX1249 are available in a 16-pin DIP and a very small QSOP that occupies the same board area as an 8-pin SO.

For 8-channel versions of these devices, see the MAX148/MAX149 datasheet.

关键特性

以下关键特性由Maxim美信半导体提供：

4-Channel Single-Ended or 2-Channel Differential Inputs

Single +2.7V to +5.25V Operation

Internal 2.5V Reference (MAX1248)

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

16-Pin QSOP Package (same area as 8-pin SO)

热门应用

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

系统监控

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