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AD7190 Arkusz danych(PDF) 2 Page - Analog Devices |
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AD7190 Arkusz danych(HTML) 2 Page - Analog Devices |
2 / 21 page AD7190 Preliminary Technical Data Rev.PrD 7/08 | Page 2 SPECIFICATIONS AVDD = 3 V to 5.25 V; DVDD = 2.7 V to 5.25 V; GND = 0 V; REFIN1(+) = AVDD ; REFIN1(-) = GND; MCLK = 4.9152 MHz; Sinc4 filter selected; all specifications TMIN to TMAX, unless otherwise noted. Table 1. Parameter1 AD7190B Unit Test Conditions/Comments Output Update Rate 4.7 to 4800 Hz nom Chop Disabled 1.17 to 1200 Hz nom Chop Enabled No Missing Codes2 24 Bits min FS > 1 Resolution See RMS Noise and Resolution Specifications RMS Noise and Update Rates See RMS Noise and Resolution Specifications Integral Nonlinearity ±15 ppm of FSR max Offset Error3 ±100/Gain µV typ Chop Disabled ±0.5 µV typ Chop Enabled Offset Error Drift vs. Temperature4 ±150/Gain nV/°C typ Gain = 1 to 16. Chop Disabled ±10 nV/°C typ Gain = 32 to 128. Chop Disabled ±5 nV/°C typ Chop Enabled Offset Error Drift vs. Time 25 nV/1000 Hours typ Full-Scale Error3, 5 ±10 µV typ Gain Drift vs. Temperature4 ±1 ppm/°C typ Gain Drift vs. Time 10 ppm/1000 Hours typ Power Supply Rejection 100 dB min VIN = 1 V/Gain. 120 dB typical. ANALOG INPUTS Differential Input Voltage Ranges ± VREF/gain V nom VREF = REFIN(+) − REFIN(−) , gain = 1 to 128 ± (AVDD – 1V)/gain V min/max gain > 1 Absolute AIN Voltage Limits2 Unbuffered Mode GND − 50 mV V min AVDD + 50 mV V max Buffered Mode GND + 200 mV V min AVDD − 200 mV V max Analog Input Current Buffered Mode Input Current2 ±1 nA max Gain = 1 ±3 nA typ Gain > 1 Input Current Drift ±2 pA/°C typ Unbuffered Mode Input Current ±5 µA/V typ Gain = 1. Input current varies with input voltage ±1 µA/V typ Gain > 1. Input Current Drift ±50 pA/V/°C typ Normal Mode Rejection2 @ 50 Hz, 60 Hz 98 dB min 10 Hz Update Rate, 50 ± 1 Hz, 60 ± 1 Hz TBD dB min 50 Hz Update Rate, REJ606 = 1, 50 ± 1 Hz, 60 ± 1 Hz @ 50 Hz TBD dB min 50 Hz Update Rate, 50 ± 1 Hz @ 60 Hz TBD dB min 60 Hz Update Rate, 60 ± 1 Hz Common-Mode Rejection @ DC 100 dB min AIN = 1 V/gain @ 50 Hz, 60 Hz2 100 dB min 10 Hz Update Rate, 50 ± 1 Hz, 60 ± 1 Hz @ 50 Hz, 60 Hz2 100 dB min 50 ± 1 Hz (50 Hz Update Rate), 60 ± 1 Hz (60 Hz Update Rate) REFERENCE INPUT REFIN Voltage AVDD V nom REFIN = REFIN(+) − REFIN(−) |
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