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LOG101 对数放大器

数据:

描述

The LOG101 is a versatile integrated circuit that computes the logarithm or log ratio of an input current relative to a reference current.

The LOG101 is tested over a wide dynamic range of input signals. In log ratio applications, a signal current can come from a photodiode, and a reference current from a resistor in series with a precision external reference.

The output signal at VOUT is trimmed to 1V per decade of input current allowing seven decades of input current dynamic range.

Low DC offset voltage and temperature drift allow accurate measurement of low-level signals over a wide environmental temperature range. The LOG101 is specified over the temperature range –5°C to +75°C, with operation over –40°C to +85°C.

特性

  • 易于使用的完整核心功能
  • 高精度:超过5年的0.01%FSO
  • < li>宽输入动态范围:
    7.5十年,100pA至3.5mA
  • 低静态电流:1mA
  • 宽电源范围:±4.5V至±18V
  • 应用程序
    • 日志,日志比率,反日志计算:
      通信,分析,医疗,工业,测试和一般仪器
    • 光电信号压缩AMPS
    • 模拟到数字(A /D)转换器前面的模拟信号压缩

注意:受美国专利保护# 6667650;其他专利正在申请中。

参数 与其它产品相比 对数放大器

 
Scale Factor (V/decade)
Input Current Range (Min) (nA)
Input Current Range (Max) (mA)
Conformity Error (initial 5 decades) (Max) (%)
Conformity Error (initial 5 decades) (typ. over temp) (%/degree C)
Offset Voltage (Input Amplifiers) (Max) (mV)
Vs (+/-) (Min) (V)
Vs (+/-) (Max) (V)
Iq (Max) (mA)
Reference Type
Auxiliary Op Amps
Full-Scale Output Voltage (Min) (+/- V)
Full-Scale Output Voltage (Max) (+/- V)
Operating Temperature Range (C)
Pin/Package
Package Group
Package Size: mm2:W x L (PKG)
Specified Voltage (+/- V)
LOG101
1    
100    
3.5    
0.2    
0.0001    
1.5    
4.5    
18    
1.5    
External    
0    
1.2    
1.5    
-40 to 85    
8SOIC    
SOIC    
8SOIC: 29 mm2: 6 x 4.9(SOIC)    
5