Datasheet

Data Sheet AD7190
Rev. C | Page 3 of 40
SPECIFICATIONS
AV
DD
= 4.75 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 AD7190B 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
B Grade ±5 ppm of FSR max ±1 ppm typical, gain = 1.
±15 ppm of FSR max ±5 ppm typical, gain > 1.
WB Grade ±7 ppm of FSR max ±1 ppm typical, gain = 1.
±30 ppm of FSR max ±5 ppm typical, gain > 1.
Offset Error
4, 5
±75/gain μV typ Chop disabled.
±0.5 μV typ Chop enabled.
Offset Error Drift vs. Temperature
5
±100/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
B Grade ±0.005 % max
±0.001 % typical, gain = 1, T
A
= 25°C,
AV
DD
= 5 V
6
.
WB Grade ±0.0075 % max
±0.001 % typical, gain = 1, T
A
= 25°C,
AV
DD
= 5 V
6
.
±0.0075 % typ Gain > 1, post internal full-scale calibration.
Gain Drift vs. Temperature ±1 ppm/°C typ
Gain Drift vs. Time 10 ppm/1000 hours typ Gain = 1.
Power Supply Rejection 95 dB typ Gain = 1, V
IN
= 1 V.
B Grade 100 dB min Gain > 1, V
IN
= 1 V/gain. 110 dB typical.
WB Grade 95 dB min Gain > 1, V
IN
= 1 V/gain. 110 dB typical.
Common-Mode Rejection
@ DC 100 dB min Gain = 1, V
IN
= 1 V
2
.
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
7
= 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.