Analog input characteristics, Cs5373a – Cirrus Logic CS5373A User Manual
Page 6

CS5373A
6
DS703F2
ANALOG INPUT CHARACTERISTICS
Notes: 7. Maximum integrated noise over the measurement bandwidth for the voltage reference device attached
to the VREF
±
inputs.
8. The modulator analog inputs are normally driven by a CS3301A/02A amplifier.
9. Differential anti-alias capacitors are discrete external components and must be of good quality (C0G,
NPO, poly). Poor quality capacitors will degrade total harmonic distortion (THD) performance.
Parameter
Symbol Min Typ
Max
Unit
VREF Input
{VREF+} - {VREF-}
VREF
-
2.500
-
V
VREF-
(
VREF-
-
VA -
-
V
VREF Input Current, Modulator Only
VREF
IMOD
-
120
-
µA
VREF Input Current, Modulator + DAC AC Mode
VREF
IMAC
-
200
-
µA
VREF Input Current, Modulator + DAC DC Mode
VREF
IMDC
-
160
-
µA
VREF Input Noise
(
VREF
IN
-
-
1
µV
rms
Modulator INR±
,
INF± Inputs
External Anti-alias Filter
Series Resistance
Differential Capacitance
R
AA
C
AA
-
-
680
20
-
-
Ω
nF
Differential Input Impedance
INR
±
INF
±
ZDIF
INR
ZDIF
INF
-
-
20
1
-
-
k
Ω
M
Ω
Single-ended Input Impedance
INR
±
INF
±
ZSE
INR
ZSE
INF
-
-
40
2
-
-
k
Ω
M
Ω
DAC CAP± Input
External Anti-alias Filter
Differential Capacitance
)
C
AA
-
10
-
nF