Cirrus Logic CS42L42 Manual page 22

Table 3-17. Power-Supply Rejection Ratio (PSRR) Characteristics (Cont.)
Test conditions (unless specified otherwise):
GNDCP = 0 V; voltages are with respect to ground; VL = VA = 1.8 V, VP = 3.6 V; T
HSBIAS (HSBIAS = 2.7-V mode, I
PSRR with 100-mVpp signal AC coupled to VA supply
HSBIAS (HSBIAS = 2.7-V mode, I
PSRR with 1-Vpp signal AC coupled to VP supply
HSBIAS (Normal Mode, HSBIAS = 2.0-V mode, I
PSRR with 100-mVpp signal AC coupled to VA supply
HSBIAS (Normal Mode, HSBIAS = 2.0-V mode, I
PSRR with 100-mVpp signal AC coupled to VP supply
1.PSRR test
configuration:
Typical PSRR
can vary by
Power DAC
approximately
6 dB below the
indicated
values.
OUT
Analog Generator
2.No load connected to any analog outputs.
3.The accurate reference, which sets the HSBIAS output voltage, is powered from VA.
4.If HS_CLAMP1/2 are connected to HS3/4, PSRR is reduced by 6 dB.
DS1083F2
Fig. 2-1 and Fig. 2-2
Parameters 1
= 500 µA)
OUT
3,4
= 500 µA)
OUT
4
= 500 µA)
OUT
3,4
= 500 µA)
OUT
4
Analog Output PSRR
+5 V +5 V
–
+
OUT
GND
Operational Amplifier
Analog Test Equipment
Analog Analyzer
show CS42L42 connections; input test signal held low (all zero data); GNDA = GNDL =
= +25°C.
A
DUT
Power DAC
PWR
GND
OUT
– + – +
OUT
Analog Generator
3 Characteristics and Specifications
Minimum Typical Maximum
217 Hz — 105
1 kHz — 100
20 kHz — 83
217 Hz — 108
1 kHz — 95
20 kHz — 70
217 Hz — 75
1 kHz — 70
20 kHz — 55
217 Hz — 75
1 kHz — 70
20 kHz — 55
Digital Output PSRR
+5 V +5 V
–
+
OUT
GND
Operational Amplifier
Test Equipment
–
Analog Analyzer
CS42L42
Unit
— dB
— dB
— dB
— dB
— dB
— dB
— dB
— dB
— dB
— dB
— dB
— dB
DUT
PWR
GND
SDOUT
+
Digital Analyzer
22