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AD7746ARUZ-REEL7 датащи(PDF) 3 Page - Analog Devices |
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AD7746ARUZ-REEL7 датащи(HTML) 3 Page - Analog Devices |
3 / 28 page AD7745/AD7746 Rev. 0| Page 3 of 28 SPECIFICATIONS VDD = 2.7 V to 3.6 V or 4.75 V to 5.25 V; GND = 0 V; EXC = 32 kHz; EXC = ±VDD/2; –40°C to +125°C, unless otherwise noted. Table 1. Parameter Min Typ Max Unit Test Conditions/Comments CAPACITIVE INPUT Conversion Input Range ±4.096 pF1 Factory calibrated Integral Nonlinearity (INL)2 ±0.01 % of FSR No Missing Codes2 24 Bit Conversion time ≥ 62 ms Resolution, p-p 16.5 Bit Conversion time = 62 ms, see Table 5 Resolution Effective 19 Bit Conversion time = 62 ms, see Table 5 Output Noise, rms 2 aF/ √Hz See Table 5 Absolute Error3 ±4 fF1 25°C, VDD = 5 V, after offset calibration Offset Error2, 4 32 aF1 After system offset calibration, Excluding effect of noise4 System Offset Calibration Range2 ±1 pF Offset Drift vs. Temperature –1 aF/°C Gain Error5 0.02 0.08 % of FS 25°C, VDD = 5 V Gain Drift vs. Temperature2 –28 –26 –24 ppm of FS/°C Allowed Capacitance to GND2 60 pF See Figure 9 and Figure 10 Power Supply Rejection 0.3 1 fF/V Normal Mode Rejection 65 dB 50 Hz ± 1%, conversion time = 62 ms 55 dB 60 Hz ± 1%, conversion time = 62 ms Channel-to-Channel Isolation 70 dB AD7746 only CAPDAC Full Range 17 21 pF Resolution6 164 fF 7-bit CAPDAC Drift vs. Temperature2 24 26 28 ppm of FS/°C EXCITATION Frequency 32 kHz Voltage Across Capacitance ±VDD/8 V Configurable via digital interface ±VDD/4 V ±VDD × 3/8 V ±VDD/2 V Average DC Voltage Across Capacitance <±40 mV Allowed Capacitance to GND2 100 pF See Figure 11 TEMPERATURE SENSOR7 VREF internal Resolution 0.1 °C Error2 ±0.5 ±2 °C Internal temperature sensor ±2 °C External sensing diode8 VOLTAGE INPUT7 VREF internal or VREF = 2.5 V Differential VIN Voltage Range ±VREF V Absolute VIN Voltage2 GND − 0.03 VDD + 0.03 V Integral Nonlinearity (INL) ±3 ±15 ppm of FS No Missing Codes2 24 Bit Conversion time = 122.1 ms Resolution, p-p 16 Bits Conversion time = 62 ms See Table 6 and Table 7 Output Noise 3 µV rms Conversion time = 62 ms See Table 6 and Table 7 Offset Error ±3 µV Offset Drift vs. Temperature 15 nV/°C Full-Scale Error2, 9 0.025 0.1 % of FS |
Аналогичный номер детали - AD7746ARUZ-REEL7 |
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Аналогичное описание - AD7746ARUZ-REEL7 |
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