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AD8305ACP-REEL7 Scheda tecnica(PDF) 2 Page - Analog Devices |
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AD8305ACP-REEL7 Scheda tecnica(HTML) 2 Page - Analog Devices |
2 / 20 page REV. A –2– AD8305–SPECIFICATIONS (VP = 5 V, VN = 0 V, TA = 25 C, RREF = 200 k , and VRDZ connected to VREF, unless otherwise noted.) Parameter Conditions Min Typ Max Unit INPUT INTERFACE Pin 4, INPT, Pin 3, IREF Specified Current Range, IPD Flows toward INPT Pin 10 n 1 m A Input Current Min/Max Limits Flows toward INPT Pin 10 m A Reference Current, IREF, Range Flows toward IREF Pin 10 n 1 m A Summing Node Voltage Internally Preset; May be Altered by User 0.46 0.5 0.54 V Temperature Drift –40 ∞C < TA < +85∞C 0.015 mV/ ∞C Input Offset Voltage VINPT – VSUM, VIREF – VSUM –20 +20 mV LOGARITHMIC OUTPUT Pin 9, VLOG Logarithmic Slope 190 200 210 mV/dec –40 ∞C < TA < +85∞C 185 215 mV/dec Logarithmic Intercept 1 0.3 1 1.7 nA –40 ∞C < TA < +85∞C 0.1 2.5 nA Law Conformance Error 10 nA < IPD < 1 mA 0.1 0.4 dB Wideband Noise 2 IPD > 1 mA 0.7 mV÷Hz Small Signal Bandwidth 2 IPD > 1 mA 0.7 MHz Maximum Output Voltage 1.7 V Minimum Output Voltage Limited by VN = 0 V 0.01 V Output Resistance 4.375 5 5.625 k W REFERENCE OUTPUT Pin 2, VREF Voltage wrt Ground 2.435 2.5 2.565 V –40 ∞C < TA < +85∞C 2.4 2.6 V Maximum Output Current Sourcing (Grounded Load) 20 mA Incremental Output Resistance Load Current < 10 mA 2 W OUTPUT BUFFER Pin 10, BFIN; Pin 11, SCAL; Pin 12, VOUT Input Offset Voltage –20 +20 mV Input Bias Current Flowing out of Pin 10 or 11 0.4 mA Incremental Input Resistance 35 M W Output Range RL = 1 k W to ground VP – 0.1 V Incremental Output Resistance Load Current < 10 mA 0.5 W Peak Source/Sink Current 25 mA Small Signal Bandwidth GAIN = 1 15 MHz Slew Rate 0.2 V to 4.8 V Output Swing 15 V/ ms POWER SUPPLY Pin 8, VPOS; Pin 6 and Pin 7, VNEG Positive Supply Voltage (VP – VN) £ 12 V 3 5 12 V Quiescent Current 5.4 6.5 mA Negative Supply Voltage (Optional) (VP – VN) £ 12 V –5.5 0 V NOTES 1Other values of logarithmic intercept can be achieved by adjusting R REF. 2Output noise and incremental bandwidth are functions of input current, measured using output buffer connected for GAIN = 1. |
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