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AD7195 Scheda tecnica(PDF) 4 Page - Analog Devices

Il numero della parte AD7195
Spiegazioni elettronici  Sigma-Delta ADC with PGA and AC Excitation
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
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Data Sheet
AD7195
Rev. A | Page 3 of 44
SPECIFICATIONS
AVDD = 4.75 V to 5.25 V, DVDD = 2.7 V to 5.25 V, AGND = DGND = 0 V; REFIN(+) = AVDD, REFIN(−) = AGND, MCLK = 4.92 MHz,
TA = TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments1
ADC
Output Data Rate
4.7
4800
Hz
Chop disabled
1.17
1200
Hz
Chop enabled, sinc4 filter
1.56
1600
Hz
Chop enabled, sinc3 filter
No Missing Codes2
24
Bits
FS > 1, sinc4 filter3
24
Bits
FS > 4, sinc3 filter3
Resolution
See the RMS Noise and Resolution section
RMS Noise and Output
Data Rates
See the RMS Noise and Resolution section
Integral Nonlinearity
Gain = 12
±1
±5
ppm of FSR
Gain > 1
±5
±15
ppm of FSR
Offset Error4, 5
±75/gain
µV
Chop disabled
±0.5
µV
Chop enabled
Offset Error Drift vs.
Temperature
±100/gain
nV/°C
Gain = 1 to 16; chop disabled
±5
nV/°C
Gain = 32 to 128; chop disabled
±5
nV/°C
Chop enabled
Offset Error Drift vs. Time
25
nV/1000
hours
Gain > 32
Gain Error4
±0.001
±0.005
% max
AVDD = 5 V, gain = 1, TA = 25°C (factory calibration
conditions)
±0.006
%
Gain > 1, post internal full-scale calibration
Gain Drift vs. Temperature
±1
ppm/°C
Gain Drift vs. Time
10
ppm/1000
hours
Gain = 1
Power Supply Rejection
95
dB
Gain = 1, VIN = 1 V
98
103
Gain = 8, VIN = 1 V/gain
100
110
dB
Gain > 8, VIN = 1 V/gain
Common-Mode Rejection
@ DC2
100
115
dB min
Gain = 1, VIN = 1 V
@ DC
115
140
dB min
Gain > 1, VIN = 1 V/gain
@ 50 Hz, 60 Hz2
120
dB
10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz
@ 50 Hz, 60 Hz2
120
dB
50 ± 1 Hz (50 Hz output data rate), 60 ± 1 Hz
(60 Hz output data rate)
Normal Mode Rejection2
Sinc4 Filter
Internal Clock
@ 50 Hz, 60 Hz
100
dB
10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz
74
dB
50 Hz output data rate, REJ606 = 1, 50 ± 1 Hz, 60 ± 1 Hz
@ 50 Hz
96
dB
50 Hz output data rate, 50 ± 1 Hz
@ 60 Hz
97
dB
60 Hz output data rate, 60 ± 1 Hz
External Clock
@ 50 Hz, 60 Hz
120
dB
10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz
82
dB
50 Hz output data rate, REJ606 = 1, 50 ± 1 Hz, 60 ± 1 Hz
@ 50 Hz
120
dB
50 Hz output data rate, 50 ± 1 Hz
@ 60 Hz
120
dB
60 Hz output data rate, 60 ± 1 Hz
Sinc3 Filter
Internal Clock
@ 50 Hz, 60 Hz
75
dB
10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz
60
dB
50 Hz output data rate, REJ606 = 1, 50 ± 1 Hz, 60 ± 1 Hz
@ 50 Hz
70
dB
50 Hz output data rate, 50 ± 1 Hz
@ 60 Hz
70
dB
60 Hz output data rate, 60 ± 1 Hz


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