MAX1291 - 250ksps、+3V、8/4通道、12位ADC，带有+2.5V电压基准及并行接口

MAX1291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，MAX1291是250ksps、+3V、8/4通道、12位ADC，带有+2.5V电压基准及并行接口，本站介绍了MAX1291的封装应用图解、特点和优点、功能等，并给出了与MAX1291相关的Maxim元器件型号供参考。

MAX1291 - 250ksps、+3V、8/4通道、12位ADC，带有+2.5V电压基准及并行接口 - 数据转换器和采样-保持电路 - 尺寸最小的低功耗、并行输出、12位ADC - 美信半导体

产品概述

The MAX1291/MAX1293 low-power, 12-bit analog-to-digital converters (ADCs) feature a successive-approximation ADC, automatic power-down, fast wake-up (2µs), an on-chip clock, +2.5V internal reference, and a high-speed, byte-wide parallel interface. They operate with a single +3V analog supply and feature a VLOGIC pin that allows them to interface directly with a +1.8V to +5.5V digital supply.

Power consumption is only 5.7mW (VDD = VLOGIC) at the maximum sampling rate of 250ksps. Two software-selectable power-down modes enable the MAX1291/MAX1293 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can cut supply current to under 10µA at reduced sampling rates.

Both devices offer software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation. In single-ended mode, the MAX1291 has eight input channels and the MAX1293 has four input channels (four and two input channels, respectively, when in pseudo-differential mode).

Excellent dynamic performance and low power, combined with ease of use and small package size, make these converters ideal for battery-powered and data-acquisition applications or for other circuits with demanding power consumption and space requirements.

The MAX1291/MAX1293 tri-states active-low INT when active-low CS goes high. Refer to MAX1261/MAX1263 if tri-stating active-low INT is not desired.

The MAX1291 is available in a 28-pin QSOP package, while the MAX1293 is available in a 24-pin QSOP. For pin-compatible +5V, 12-bit versions, refer to the MAX1290/MAX1292 data sheet.

关键特性

以下关键特性由Maxim美信半导体提供：

12-Bit Resolution, ±0.5 LSB Linearity

+3V Single Operation

User-Adjustable Logic Level (+1.8V to +3.6V)

Internal +2.5V Reference

Software-Configurable, Analog Input Multiplexer

8-Channel Single-Ended/4-Channel Pseudo-Differential (MAX1291)

4-Channel Single-Ended/2-Channel Pseudo-Differential (MAX1293)

Software-Configurable, Unipolar/Bipolar Inputs

Low Power:

1.9mA (250ksps)

1.0mA (100ksps)

400µA (10ksps)

2µA (Shutdown)

Internal 3MHz Full-Power Bandwidth Track/Hold

Byte-Wide Parallel (8 + 4) Interface

Small Footprint:

28-Pin QSOP (MAX1291)

24-Pin QSOP (MAX1293)

热门应用

数据采集系统

数据记录

能量管理

工业控制系统

病人监护

触摸屏

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