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LOG112AIDE4 Datasheet(PDF) 4 Page - Texas Instruments |
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LOG112AIDE4 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 20 page LOG112, 2112 4 SBOS246D www.ti.com FREQUENCY RESPONSE, CORE LOG(5) BW, 3dB I2 = 10nA CC = 4500pF 0.1 kH I2 = 1µACC = 150pF 38 kH I2 = 10µACC = 150pF 40 kH I2 = 1mA CC = 50pF 45 kHz Step Response Increasing I1 = 10nA to 100nA CC = 120pF, I2 = 31.6nA 1.1 ms I1 = 1µA to 100µACC = 375pF, I2 = 10µA 1.6 µs I1 = 1µA to 1mA CC = 950pF, I2 = 31.6µA 1.5 µs Decreasing I1 = 100nA to 10nA CC = 120pF, I2 = 31.6nA 2.1 ms I1 = 100µA to 1µACC = 375pF, I2 = 10µA 31.2 µs I1 = 1mA to 1µACC = 950pF, I2 = 31.6µA39 µs Increasing I2 = 10nA to 100nA CC = 125pF, I1 = 31.6nA 2.6 ms I2 = 1µA to 100µACC = 750pF, I1 = 10µA 113 µs I2 = 1µA to 1mA CC = 10.5nF, I1 = 31.6µA 1.2 ms Decreasing I2 = 100nA to 10nA CC = 125pF, I1 = 31.6nA 630 µs I2 = 100µA to 1µACC = 750pF, I1 = 10µA 6.6 µs I2 = 1mA to 1µACC = 10.5nF, I1 = 31.6µA 13.3 µs OP AMP, A3 Input Offset Voltage +250 ±1000 µV vs Temperature TMIN to TMAX ±2 µV/°C vs Supply VS = ±4.5V to ±18V 5 50 µV/V Input Bias Current –10 nA Input Offset Current ±0.5 nA Input Voltage Range (V–) (V+) – 1.5 V Input Noise, f = 0.1Hz to 10Hz 1 µV PP f = 1kHz 28 nV/√Hz Open-Loop Voltage Gain 88 dB Gain-Bandwidth Product 1.4 MHz Slew Rate 0.5 V/ µs Settling Time, 0.01% G = –1, 3V Step, CL = 100pF 16 µs Rated Output (V–) + 1.5 (V+) – 0.9 V Short-Circuit Current ±4mA VOLTAGE REFERENCE Bandgap Voltage 2.5 V Error, Initial ±0.05 ±0.5 % vs Temperature TMIN to TMAX ±25 ppm/ °C vs Supply VS = ±4.5V to ±18V ±10 ppm/V vs Load ILOAD = 10mA ±600 ppm/mA Short-Circuit Current 16 mA POWER SUPPLY Operating Range VS ±4.5 ±18 V Quiescent Current IO = 0 LOG112 ±1.25 ±1.75 mA LOG2112 ±2.5 ±3.5 mA TEMPERATURE RANGE Specified Range, TMIN to TMAX –575 °C Operating Range –40 85 °C Storage Range –55 125 °C Thermal Resistance, θ JA SO-14 110 °C/W SO-16 80 °C/W NOTES: (1) Log Conformity Error is the peak deviation from the best-fit-straight line of VO vs LOG(I1/I2) curve expressed as a percent of peak-to-peak full-scale output. K, scale factor, equals 0.5V output per decade of input current. (2) Scale factor of core log function is trimmed to 0.5V output per decade change of input current. (3) Worst-case Total Error for any ratio of I1/I2, as the largest of the two errors, when I1 and I2 are considered separately. (4) Total Error includes offset voltage, bias current, gain, and log conformity. (5) Bandwidth (3dB) and transient response are a function of both the compensation capacitor and the level of input current. ELECTRICAL CHARACTERISTICS (Cont.) Boldface limits apply over the specified temperature range, TA = –5°C to +75°C. At TA = +25°C, VS = ±5V, and RL = 10kΩ, unless otherwise noted. LOG112, LOG2112 PARAMETER CONDITION MIN TYP MAX UNITS |
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