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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.
注意：受美國專利保護＃ 6667650;其他專利正在申請中。
| 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 |
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