Datasheet

REV. A
AD7719
–15–
Table II. Typical Output RMS Noise vs. Input Range and Update Rate for Main ADC (Buffered Mode) Output RMS
Noise in V
SF Data Update
Input Range
Word Rate (Hz) 20 mV 40 mV 80 mV 160 mV 320 mV 640 mV 1.28 V 2.56 V
13 105.3 1.50 1.50 1.60 1.75 3.50 4.50 6.70 11.75
69 19.79 0.60 0.65 0.65 0.65 0.65 0.95 1.40 2.30
255 5.35 0.35 0.35 0.37 0.37 0.37 0.51 0.82 1.25
Table III. Peak-to-Peak Resolution vs. Input Range and Update Rate for Main ADC (Buffered Mode) Peak-to-Peak
Resolution in Bits
SF Data Update
Input Range
Word Rate (Hz) 20 mV 40 mV 80 mV 160 mV 320 mV 640 mV 1.28 V 2.56 V
13 105.3 12 13 14 15 15 15.5 16 16
69 19.79 13 14 15 16 17 17.5 18 18.5
255 5.35 14 15 16 17 18 18.5 18.8 19.2
Table IV. Typical Output RMS Noise vs. Input Range and Update Rate for Main ADC (Unbuffered Mode) Output
RMS Noise in V
SF Data Update
Input Range
Word Rate (Hz) 20 mV 40 mV 80 mV 160 mV 320 mV 640 mV 1.28 V 2.56 V
13 105.3 1.27 1.27 1.35 1.48 2.95 3.82 5.69 10.2
69 19.79 0.52 0.56 0.56 0.56 0.56 0.82 1.21 2.00
255 5.35 0.30 0.30 0.32 0.32 0.32 0.44 0.71 1.10
Table V. Peak-to-Peak Resolution vs. Input Range and Update Rate for Main ADC (Unbuffered Mode) Peak-to-Peak
Resolution in Bits
SF Data Update
Input Range
Word Rate (Hz) 20 mV 40 mV 80 mV 160 mV 320 mV 640 mV 1.28 V 2.56 V
13 105.3 12 13 14 15 15 15.5 16 16
69 19.79 13 14 15 16 17 17.5 18 18.5
255 5.35 14 15 16 17 18 18.5 19 19.5
Table VI. Typical Output RMS Noise vs. Update
Rate for Auxiliary ADC (Unbuffered Mode)
SF Data Update Input Range
Word Rate (Hz) 2.5 V
13 105.3 10.75 µV
69 19.79 2.00 µV
255 5.35 1.15 µV
Table VII. Peak-to-Peak Resolution vs. Update
Rate for Auxiliary ADC (Unbuffered Mode)
SF Data Update Input Range
Word Rate (Hz) 2.5 V
13 105.3 16 Bits
69 19.79 16 Bits
255 5.35 16 Bits