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MAX188：低功耗、8通道、串行12位ADC

对于3V应用，请参考MAX146和MAX1246

The MAX186/MAX188 are 12-bit data-acquisition systems that combine an 8-channel multiplexer, high-bandwidth track/hold, and serial interface together with high conversion speed and ultra-low power consumption. The devices operate with a single +5V supply or dual ±5V supplies. The analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation. The 4-wire serial interface directly connects to SPI, QSPI™ and MICROWIRE® devices without external logic. A serial strobe output allows direct connection to TMS320 family digital signal processors. The MAX186/MAX188 use either the internal clock or an external serial-interface clock to perform successive-approximation A/D conversions. The serial interface can operate beyond 4MHz when the internal clock is used. The MAX186 has an internal 4.096V reference while the MAX188 requires an external reference. Both parts have a reference-buffer amplifier that simplifies gain trim. The MAX186/MAX188 provide a hard-wired active-low SHDN pin and two software-selectable power-down modes. Accessing the serial interface automatically powers up the devices, and the quick turn-on time allows the MAX186/MAX188 to be shut down between every conversion. Using this technique of powering down between conversions, supply current can be cut to under 10µA at reduced sampling rates. The MAX186/MAX188 are available in 20-pin PDIP and SO packages, and in a shrink small-outline package (SSOP), that occupies 30% less area than an 8-pin PDIP. For applications that call for a parallel interface, see the MAX180/MAX181 data sheet. For anti-aliasing filters, consult the MAX274/MAX275 data sheet.

关键特性 8-Channel Single-Ended or 4-Channel Differential Inputs Single +5V or ±5V Operation Low Power: 1.5mA (Operating Mode) 2µA (Power-Down Mode) Internal Track/Hold, 133kHz Sampling Rate Internal 4.096V Reference (MAX186) SPI-/QSPI-/MICROWIRE-/TMS320-Compatible 4-Wire Serial Interface Software-Configurable Unipolar or Bipolar Inputs 20-Pin PDIP, SO, SSOP Packages Evaluation Kit Available

MAX186、MAX188：典型工作电路 应用 自动测试设备(ATE) 电池供电应用 数据采集 高精度过程控制 医疗仪器 便携式数据记录 机器人技术

数据手册DataSheet

关键参数

开发工具

• MAX186EVKIT

技术资料

• Differential Gain and Phase—Why Measure It, if You Cannot See It?
• 12-Bit ADC Upgrades µC's Internal 8-Bit ADC

质量和环境数据

• MAX188.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
• MAX146：+2.7V、低功耗、8通道、串行12位ADC
• MAX147：+2.7V、低功耗、8通道、串行12位ADC
• MAX1247：+2.7V、低功耗、4通道、串行12位ADC，QSOP-16封装
• MAX1246：+2.7V、低功耗、4通道、串行12位ADC，QSOP-16封装

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