LTC1442 具有基准的超低功率单/双通道比较器

The LTC®1440/LTC1441/LTC1442 are ultralow power single and dual comparators with built-in references. The comparators feature less than 3.7µA supply current over temperature (LTC1440), a 1.182V ±1% reference, programmable hysteresis (LTC1440/LTC1442) and TTL/CMOS outputs that sink and source current. The reference output can drive a bypass capacitor of up to 0.01µF without oscillation.

The comparators operate from a single 2V to 11V supply or a dual ±1V to ±5.5V supply (LTC1440). Comparator hysteresis is easily programmed by using two resistors and the HYST pin (LTC1440/LTC1442). Each comparator’s input operates from the negative supply to within 1.3V of the positive supply. The comparator output stage can continuously source up to 40mA. By eliminating the cross-conducting current that normally happens when the comparator changes logic states, the power supply glitches are eliminated.

The LTC1440 is available in 8-pin PDIP, SO, MSOP and DFN packages. The LTC1441/LTC1442 are available in 8-pin PDIP and SO packages

产品特点 Features
  • Ultralow Quiescent Current: 2.1µA Typ (LTC1440)
  • Reference Output Drives 0.01µF Capacitor
  • Adjustable Hysteresis (LTC1440/LTC1442)
  • Wide Supply Range:
      Single: 2V to 11V
      Dual: ±1V to ±5.5V
  • Input Voltage Range Includes the Negative Supply
  • TTL/CMOS Compatible Outputs
  • 12µs Propagation Delay with 10mV Overdrive
  • No Crowbar Current
  • 40mA Continuous Source Current
  • Pin Compatible Upgrades for MAX921/922/923
  • 3mm x 3mm x 0.75mm DFN Package (LTC1440)
参数
LTC1442 参数
应用
  • Battery-Powered System Monitoring
  • Threshold Detectors
  • Window Comparators
  • Oscillator Circuits
典型应用图
LTC1442 典型应用
LTC1442 订购信息和价格参考Package Variations and Pricing
器件型号 封装 引脚 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量) *
LTC1442CN8 PDIP 8 C $2.15  $1.80 
LTC1442CN8#PBF PDIP 8 C $2.15  $1.80 
LTC1442CS8 SO 8 C $2.15  $1.80 
LTC1442CS8#PBF SO 8 C $2.15  $1.80 
LTC1442CS8#TR SO 8 C $1.86 
LTC1442CS8#TRPBF SO 8 C $1.86 
LTC1442IN8 PDIP 8 I $2.55  $2.15 
LTC1442IN8#PBF PDIP 8 I $2.55  $2.15 
LTC1442IS8 SO 8 I $2.55  $2.15 
LTC1442IS8#PBF SO 8 I $2.55  $2.15 
LTC1442IS8#TR SO 8 I $2.21 
LTC1442IS8#TRPBF SO 8 I $2.21 
LTC1442 数据手册及相关资料下载
  1. 数据手册(英文) : LTC1440/LTC1441/LTC1442 - Ultralow Power Single/Dual Comparator with Reference.PDF
  2. 规格变更通知书 : LTC1440/LTC1441/LTC1442 - Ultralow Power Single/Dual Comparator with Reference Specification Notice.PDF
  3. 应用指南 (英文) : AN113 - Power Conversion, Measurement and Pulse Circuits.PDF
  4. 应用指南 (英文) : AN70 - A Monolithic Switching Regulator with 100µV Output Noise.PDF
  5. 设计要点 (英文) : DN123 - Ultralow Power Comparators Include Reference.PDF
  6. 设计要点 (英文) : DN137 - New Comparators Feature Micropower Operation Under All Conditions.PDF
  7. 设计要点 (英文) : DN142 - Ultralow Quiescent Current DC/DC Converters for Light Load Applications.PDF
  8. 设计要点 (英文) : DN161 - The Smart Rock.PDF
  9. 设计要点 (英文) : DN163 - 1µA Op Amp Permits Precision Portable Circuitry.PDF
  10. 可靠性数据 : R312 Reliability Data .PDF
  11. LT Journal : Sep 1999 Comparator Circuit Provides Automatic Shutdown of the LT1795 High Speed ADSL Power Amplifier.PDF