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LOG102AIDR Datasheet(PDF) 4 Page - Texas Instruments |
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LOG102AIDR Datasheet(HTML) 4 Page - Texas Instruments |
4 / 19 page www.ti.com LOG102 4 SBOS211B TYPICAL CHARACTERISTICS At TA = +25°C, VS = ±5V, 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 I 2 48 3dB FREQUENCY RESPONSE I 2 0.1 1nA 1M 100k 10k 1k 100 10 1 10nA 100nA 1 µA10µA 100 µA 1mA 100 µA 100 µA 1mA I 1 = 1mA 1 µA 1mA to 10 µA 100nA 10nA I 1 = 1nA 10nA 10nA 1 µA 10 µA 100 µA C C = 1µ F C C = 1000pF 10µ A to 1µ A C C = 10pF I 1 = 1nA 1nA 100 µA NORMALIZED TRANSFER FUNCTION 0.001 3 2 1 0 –1 –2 –3 0.01 1 100 Current Ratio, 0.1 10 1000 I 1 I 2 I 1 I 2 V OUT = 1V • Log TOTAL ERROR vs INPUT CURRENT 1nA 60 50 40 30 20 10 0 100nA 10nA 70 °C 0 °C 25 °C 10 µA 100 µA Input Current (I 1 or I2) 1 µA 1mA MINIMUM VALUE OF COMPENSATION CAPACITOR 1nA 10000 1000 100 10 1 100nA 10nA 10 µA 1mA I 2 1 µA 100 µA 10mA Select C C for I1 min and I 2 max I 1 = 1nA Values below 2pF may be ignored. I 1 = 1mA I 1 = 100µA I 1 = 10nA I 1 = 100nA I 1 = 1µA I 1 = 10µA 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 –0.05 –0.10 –60 –40 –20 0 20 40 60 80 GAIN ERROR vs TEMPERATURE Temperature ( °C) Not Recommended For New Designs |
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