单电源、低功耗、2通道、串行8位ADC

 

器件号	Replacement	Explanation

说明

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The MAX1108/MAX1109 low-power, 8-bit, dual-channel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H) voltage reference, clock, and serial interface. The MAX1108 is specified from +2.7V to +3.6V and consumes only 105µA. The MAX1109 is specified from +4.5V to +5.5V and consumes only 130µA. The analog inputs are software configurable, allowing unipolar/bipolar and single-ended/differential operation; battery monitoring capability is also included.

The full-scale analog input range is determined by the internal reference of +2.048V (MAX1108) or +4.096V (MAX1109), or by an externally applied reference ranging from 1V to V_DD. The MAX1108/MAX1109 also feature a software power-down mode that reduces power consumption to 0.5µA when the device is not in use. The 4-wire serial interface directly connects to SPI™, QSPI™, and MICROWIRE™ devices without external logic. Conversions up to 50ksps are performed using either the internal clock or an external serial-interface clock.

The MAX1108 and MAX1109 are available in a 10-pin µMAX package with a footprint that is just 20% of an 8-pin plastic DIP.

MAX1108、MAX1109：典型工作电路 放大+

关键特性

• Single Supply:
  • +2.7V to +3.6V (MAX1108)
  • +4.5V to +5.5V (MAX1109)
• Low Power:
  • 105µA at +3V and 50ksps
  • 0.5µA in Power-Down Mode
• Software-Configurable Unipolar or Bipolar Inputs
• Input Voltage Range: 0 to V_DD
• Internal Track/Hold
• Internal Reference:
  • +2.048V (MAX1108)
  • +4.096V (MAX1109)
• Reference Input Range: 1V to V_DD
• SPI/QSPI/MICROWIRE-Compatible Serial Interface
• V_DD Monitoring Mode
• Small 10-Pin µMAX Package

应用

• 4mA至20mA供电远端系统
• 手持式测量设备
• 医疗仪器
• 便携式数据记录
• 接收信号强度指示
• 太阳能供电远端系统
• 系统诊断