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

尺寸最小的低功耗、并行输出、12位ADC

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 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)

MAX1291、MAX1293：典型工作电路 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

数据手册DataSheet

关键参数

质量和环境数据

• MAX1291.pdf

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