Cirrus Logic CS5373A - 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-} ( Note 2, 3 ) VREF - 2.500 - V
VREF- ( Note 4 ) 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 ( Note 7 ) VREF
IN
- - 1 µV
rms
Modulator INR± , INF± Inputs
External Anti-alias Filter Series Resistance
( Note 8, 9 ) 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
( Note 9 )
C
AA
- 10 - nF