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CAV444 Datasheet(PDF) 9 Page - Analog Devices |
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CAV444 Datasheet(HTML) 9 Page - Analog Devices |
9 / 12 page CAV444 – C/V transmitter IC with adjustable output voltage for capacitive input signals Analog Microelectronics GmbH An der Fahrt 13, D – 55124 Mainz Mai 2010 - Rev 1.1 - Page 9/12 Phone: +49 (0)6131/91 0730-0 Fax: +49 (0)6131/91 073-30 Internet: http://www.analogmicro.de Email: info@analogmicro.de ELECTRICAL SPECIFICATIONS Tamb = 25°C, VCC = 5 V (unless otherwise stated) Parameter Symbol Conditions Min. Typ. Max. Unit Supply Supply Voltage VCC Ratiometric range 4.75 5.00 5.25 V Quiescent Current ICC Tamb = -40...+105°C, GLP = 1 0.6 1.0 1.4 mA Temperature Specifications Operating Tamb -40 105 °C Storage Tst -55 125 °C Measurement Oscillator Measurement Capacitor Range CM ICM = 10µA 18 2200 pF Oscillator Frequency Range fM 1 130 kHz Oscillator Current ICM RCM = 250kΩ 9.5 10 10.75 µA Detection Frequency fSIG 1.9 kHz f/V Converter Converter Capacitor Range CW CW = CM,max / 1.6 ICW = 5 µA 11.25 1375 pF Capacitive Charge Current ICW RCW = 500 kΩ 4.75 5 5.38 µA Lowpass Stage Adjustable Gain GLP 1 10 Output Voltage VOUT Vout = VDiff + VREF 1.1 VCC – 1.1 V Corner Frequency 1 fCF1 R01 = 20 kΩ, CF1 = 1 nF 8 kHz Corner Frequency 2 fCF2 R02 = 20 kΩ, CF2 = 1 nF 8 kHz Resistive Load at pin VOUT RL 200 k Ω Capacitive Load at pin VOUT CL 50 pF Output Voltage Shift VDIFF VM = 2.5 V -1.4 1.4 V Temperature Coefficient VDIFF (together with Input Stages) dVDIFF /dT Tamb = -40...+105°C ±100 ppm/°C Internal Resistors 1 and 2 R01, R02 20 k Ω Temperature Coefficient R01,02 dR01,02 /dT Tamb = -40...+105°C 1.9 10-3/°C Ratiometric Error of VOUT RAT@VDIFF* 0.11 % FS Voltage Reference VREF Voltage VREF Ratiometric to VCC 2.5 V VREF vs. Temperature dVREF /dT Tamb = -40...+105°C ±20 ±50 ppm/°C Current IVREF Source 16 µA IVREF Sink -16 µA Load Capacitance CVREF 80 100 120 nF Ratiometric Error of VREF RAT@VREF * 0.007 % FS * RAT @ VDIFF = 2 [1.05 VDIFF(VCC = 5V) – VDIFF(VCC = 5.25V)]/[VDIFF(VCC = 5V) + VDIFF(VCC = 5.25V)] ** RAT @ VM = 2 [1.05 VM(VCC = 5V) – VM(VCC = 5.25V)]/[VM(VCC = 5V) + VM(VCC = 5.25V)] |
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