Datasheet

AD7190 Data Sheet
Rev. C | Page 4 of 40
Parameter AD7190B Unit Test Conditions/Comments
1
External Clock
@ 50 Hz, 60 Hz 120 dB min 10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz.
82 dB min
50 Hz output data rate, REJ60
7
= 1,
50 ± 1 Hz, 60 ± 1 Hz.
@ 50 Hz 120 dB min 50 Hz output data rate, 50 ± 1 Hz.
@ 60 Hz 120 dB min 60 Hz output data rate, 60 ± 1 Hz.
Sinc
3
Filter
Internal Clock
@ 50 Hz, 60 Hz 75 dB min 10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz.
60 dB min
50 Hz output data rate, REJ60 = 1,
50 ± 1 Hz, 60 ± 1 Hz.
@ 50 Hz 70 dB min 50 Hz output data rate, 50 ± 1 Hz.
@ 60 Hz 70 dB min 60 Hz output data rate, 60 ± 1 Hz.
External Clock
@ 50 Hz, 60 Hz 100 dB min 10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz.
67 dB min
50 Hz output data rate, REJ60
7
= 1,
50 ± 1 Hz, 60 ± 1 Hz.
@ 50 Hz 95 dB min 50 Hz output data rate, 50 ± 1 Hz.
@ 60 Hz 95 dB min 60 Hz output data rate, 60 ± 1 Hz.
ANALOG INPUTS
Differential Input Voltage Ranges ±V
REF
/gain V nom
V
REF
= REFINx(+) − REFINx(−),
gain = 1 to 128.
±(AV
DD
– 1.25 V)/gain V min/max Gain > 1.
Absolute AIN Voltage Limits
2
Unbuffered Mode AGND − 50 mV V min
AV
DD
+ 50 mV V max
Buffered Mode AGND + 250 mV V min
AV
DD
− 250 mV V max
Analog Input Current
Buffered Mode
Input Current
2
±2 nA max Gain = 1.
±3 nA max Gain > 1.
Input Current Drift ±5 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 ±0.05 nA/V/°C typ External clock.
±1.6 nA/V/°C typ Internal clock.
REFERENCE INPUT
REFIN Voltage AV
DD
V nom REFIN = REFINx(+) − REFINx(−).
Reference Voltage Range
2
1 V min
AV
DD
V max
The differential input must be limited to
± (AV
DD
– 1.25 V)/gain when gain > 1.
Absolute REFIN Voltage Limits
2
AGND – 50 mV V min
AV
DD
+ 50 mV V max
Average Reference Input Current 7 μA/V typ
Average Reference Input Current
Drift
±0.03 nA/V/°C typ External clock.
1.3 nA/V/°C typ Internal clock.