CS5531-AS Ver la hoja de datos (PDF) - Cirrus Logic
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CS5531-AS Datasheet PDF : 50 Pages
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CS5531/32/33/34-AS
ANALOG CHARACTERISTICS (Continued)
(See Notes 1 and 2.)
Parameter
Min
Analog Input
Common Mode + Signal on AIN+ or AIN-Bipolar/Unipolar Mode
Gain = 1
VA-
Gain = 2, 4, 8, 16, 32, 64 (Note 5) VA- + 0.7
CVF Current on AIN+ or AIN-
Gain = 1
(Note 6, 7) -
Gain = 2, 4, 8, 16, 32, 64
-
Input Current Noise
Gain = 1
-
Gain = 2, 4, 8, 16, 32, 64
-
Input Leakage for Mux when Off (at 25 °C)
-
Off-channel Mux Isolation
-
Open Circuit Detect Current
100
Common Mode Rejection
dc, Gain = 1
-
dc, Gain = 64
-
50, 60 Hz
-
Input Capacitance
-
Guard Drive Output
-
Voltage Reference Input
Range
(VREF+) - (VREF-)
1
CVF Current
(Note 6, 7) -
Common Mode Rejection
dc
-
50, 60 Hz
-
Input Capacitance
11
System Calibration Specifications
Full-scale Calibration Range
Bipolar/Unipolar Mode
3
Offset Calibration Range
Bipolar Mode
-100
Offset Calibration Range
Unipolar Mode
-90
Typ
-
-
50
1200
200
1
10
120
300
90
130
120
60
20
2.5
50
120
120
-
-
-
-
Max
Unit
VA+
VA+ - 1.7
-
-
-
-
-
-
-
-
-
-
-
-
V
V
nA
pA
pA/√Hz
pA/√Hz
pA
dB
nA
dB
dB
dB
pF
µA
(VA+)-(VA-) V
-
nA
-
dB
-
dB
22
pF
110
%FS
100
%FS
90
%FS
Notes: 5. The voltage on the analog inputs is amplified by the PGIA, and becomes VCM ± Gain*(AIN+ - AIN-)/2 at
the differential outputs of the amplifier. In addition to the input common mode + signal requirements for
the analog input pins, the differential outputs of the amplifier must remain between (VA- + 0.1 V) and
(VA+ - 0.1 V) to avoid saturation of the output stage.
6. See the section of the data sheet which discusses input models.
7. Input current on AIN+ or AIN- (with Gain = 1), or VREF+ or VREF- may increase to 250 nA if operated
within 50 mV of VA+ or VA-. This is due to the rough charge buffer being saturated under these
conditions.
DS289F5
5
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