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CS5550
6
DS630F1
ANALOG CHARACTERISTICS (Continued)
Notes: 3. The minimum FSCR is limited by the maximum allowed gain register value.
4. All outputs unloaded. All inputs CMOS level.
5. Definition for PSRR: VREFIN tied to VREFOUT, VA+ = VD+ = 5 V, a 150 mV (zero-to-peak) (60 Hz) sinewave is imposed onto the +5 V DC supply
voltage at VA+ and VD+ pins. The “+” and “-” input pins of both input channels are shorted to AGND. Then the CS5550 is commanded to continuous
conversion acquisition mode, and digital output data is collected for the channel under test. The (zero-to-peak) value of the digital sinusoidal output
signal is determined, and this value is converted into the (zero-to-peak) value of the sinusoidal voltage (measured in mV) that would need to be
applied at the channel’s inputs, in order to cause the same digital sinusoidal output. This voltage is then defined as Veq. PSRR is then (in dB):
VOLTAGE REFERENCE
Notes: 6. The voltage at VREFOUT is measured across the temperature range. From these measurements the
following formula is used to calculate the VREFOUT Temperature Coefficient:.
Parameter
Symbol
Min
Typ
Max
Unit
Dynamic Characteristics
High Rate Filter Output Word Rate
OWR
-
DCLK/1024
-
Hz
Input Sampling Rate
DCLK = MCLK/K
-
DCLK/8
-
Hz
Full Scale Calibration Range
(Note 3)
FSCR
25
-
100
%F.S.
High Pass Filter Pole Frequency
-3 dB
-
0.5
-
Hz
Power Supplies
Power Supply Currents (Active State)
IA+
ID+ (VD+ = 5 V)
ID+ (VD+ = 3.3 V)
PSCA
PSCD
-
1.3
2.9
1.7
-
mA
Power Consumption
Active State (VD+ = 5 V)
(Note 4)
Active State (VD+ = 3.3 V)
Stand-by State
Sleep State
PC
-
21
11.6
6.75
10
30
-
mW
W
Power Supply Rejection Ratio (AIN1
±)
(Gain = 10)
(50, 60 Hz)(Note 5)
(Gain = 50)
PSRR1
56
70
-
dB
Power Supply Rejection Ratio (AIN2
±)
(Gain = 50)
(50, 60 Hz)(Note 5)
PSRR2
-55-
dB
Parameter
Symbol
Min
Typ
Max
Unit
Reference Output
Output Voltage
REFOUT
2.4
-
2.6
V
Temperature Coefficient
(Note 6)
TC
-
25
60
ppm/°C
Load Regulation
(Output Current 1 A Source or Sink)
VR
-6
10
mV
Reference Input
Input Voltage Range
VREFIN
2.4
2.5
2.6
V
Input Capacitance
-
4
-
pF
Input CVF Current
-
25
-
nA
PSRR
20
150
V
eq
---------
log
=
(VREFOUTMAX - VREFOUTMIN)
VREFOUTAVG
(
1
T
A
MAX
- T
A
MIN
(
1.0 x 10
(
6
TC
VREF =
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