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LOG101AIDR Datasheet(PDF) 4 Page - Burr-Brown (TI) |
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LOG101AIDR Datasheet(HTML) 4 Page - Burr-Brown (TI) |
4 / 16 page www.ti.com LOG101 4 SBOS242B TYPICAL CHARACTERISTICS At TA = +25°C, VS = ±5V, and RL = 10kΩ, unless otherwise noted. 0 ONE CYCLE OF NORMALIZED TRANSFER FUNCTION 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 26 110 3 Current Ratio, I 1/I2 48 4.0 3.0 2.0 1.0 0.0 –1.0 –2.0 –3.0 –4.0 NORMALIZED TRANSFER FUNCTION 0.0001 0.001 0.01 0.1 1 10 100 1k 10k Current Ratio, I 1/I2 V OUT = 1V LOG (I1/I2) 3dB FREQUENCY RESPONSE 0.1 1M 100k 10k 1k 100 10 1 100 µA 100 µA 1mA I 1 = 1mA 1 µA 1mA to 10 µA 100nA 10nA I 1 = 1nA 10nA C C = 1000pF C C = 1 µF 10µ A to 1µ A C C = 1 0p F 1nA 100 µA 100pA 1nA 10nA 100nA 1 µA10µA 100µA1mA I 2 1 µA 10 µA 100 µA I 1 = 1nA 10nA 120 100 80 60 40 20 0 100pA 1nA 10nA 100nA 1 µA10µA 100µA 1mA 10mA TOTAL ERROR vs INPUT CURRENT Input Current (I 1 or I2) +75 °C +25 °C –5°C 5.8 4.8 3.8 2.8 1.8 0.8 –0.2 100pA 1nA 10nA 100nA 1 µA10µA 100µA 1mA 10mA GAIN ERROR (I 2 = 1µA) Input Current (I 1 or I2) –5 °C to –40°C +85 °C +75 °C +25 °C MINIMUM VALUE OF COMPENSATION CAPACITOR 100M 10M 1M 100k 10k 1k 100 10 1 100pA 1nA 10nA 100nA 1 µA10µA 100µA 1mA 10mA I 2 I 1 = 100pA I 1 = 1nA I 1 = 10nA I 1 = 100nA 1 µA I 1 = 10µA 100 µA 1mA Select C C for I1 min. and I 2 max. Values below 2pF may be ignored. |
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