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


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说明

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.
MAX1291、MAX1293:典型工作电路 MAX1291、MAX1293:典型工作电路 放大+

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)

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
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
(V)
External VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxnominalminmaxmaxmaxSee Notes
MAX1291 128250SARµP/8Both2.513.62.51.25-781
QSOP/28
$8.86 @1k
MAX1293 4
QSOP/24
$10.00 @1k
查看所有Precision ADCs (< 5Msps) (444)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

技术资料

设计指南 748 ADC中的ABC:理解ADC误差对系统性能的影响

质量和环境数据

产品可靠性报告: MAX1291.pdf 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX1291ACEI
  • MAX1291ACEI+
  • MAX1291ACEI+T
  • MAX1291ACEI-T
  • MAX1291AEEI
  • MAX1291AEEI+
  • MAX1291AEEI+T
  • MAX1291AEEI-T
  • MAX1291BCEI
  • MAX1291BCEI+
  • MAX1291BCEI+T
  • MAX1291BCEI-T
  • MAX1291BEEI
  • MAX1291BEEI+
  • MAX1291BEEI+T
  • MAX1291BEEI-T
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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