Datasheet

AD7192
Rev. A | Page 3 of 40
SPECIFICATIONS
AV
DD
= 3 V to 5.25 V, DV
DD
= 2.7 V to 5.25 V, AGND = DGND = 0 V; REFINx(+) = AV
DD
, REFINx(−) = AGND, MCLK = 4.92 MHz,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter AD7192B Unit Test Conditions/Comments
1
ADC
Output Data Rate 4.7 to 4800 Hz nom Chop disabled
1.17 to 1200 Hz nom Chop enabled, sinc
4
filter
1.56 to 1600 Hz nom Chop enabled, sinc
3
filter
No Missing Codes
2
24 Bits min FS > 1, sinc
4
filter
3
24 Bits min FS > 4, sinc
3
filter
3
Resolution See the RMS Noise and Resolution section
RMS Noise and Output Data Rates See the RMS Noise and Resolution section
Integral Nonlinearity
Gain = 1
2
±10 ppm of FSR max ±2 ppm typical, AV
DD
= 5 V
±15 ppm of FSR max ±2 ppm typical, AV
DD
= 3 V
Gain > 1 ±30 ppm of FSR max ±5 ppm typical, AV
DD
= 5 V
±30 ppm of FSR max ±12 ppm typical, AV
DD
= 3 V
Offset Error
4, 5
±150/gain μV typ Chop disabled
±0.5 μV typ Chop enabled
Offset Error Drift vs. Temperature ±150/gain nV/°C typ Gain = 1 to 16; chop disabled
±5 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 Gain > 32
Gain Error
4
±0.001 % typ
AV
DD
= 5 V, gain = 1, T
A
= 25°C (factory
calibration conditions)
−0.39 % typ
Gain = 128, before full-scale calibration (see
Table 23)
±0.003 % typ
Gain > 1, after internal full-scale calibration,
AV
DD
≥ 4.75 V.
±0.005 % typ
Gain > 1, after internal full-scale calibration,
AV
DD
< 4.75 V
Gain Drift vs. Temperature ±1 ppm/°C typ
Gain Drift vs. Time 10 ppm/1000 hours typ Gain = 1.
Power Supply Rejection 90 dB typ Gain = 1, V
IN
= 1 V.
95 dB min Gain > 1, V
IN
= 1 V/gain, 110 dB typ.
Common-Mode Rejection
@ DC
2
100 dB min Gain = 1, V
IN
= 1 V.
@ DC 110 dB min Gain > 1, V
IN
= 1 V/gain.
@ 50 Hz, 60 Hz
2
120 dB min 10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz.
@ 50 Hz, 60 Hz
2
120 dB min
50 ± 1 Hz (50 Hz output data rate), 60 ± 1 Hz
(60 Hz output data rate).
Normal Mode Rejection
2
Sinc
4
Filter
Internal Clock
@ 50 Hz, 60 Hz 100 dB min 10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz.
74 dB min
50 Hz output data rate, REJ60
6
= 1,
50 ± 1 Hz, 60 ± 1 Hz.
@ 50 Hz 96 dB min 50 Hz output data rate, 50 ± 1 Hz.
@ 60 Hz 97 dB min 60 Hz output data rate, 60 ± 1 Hz.