Philips CEM2100/00 Service Manual page 427

5-4-10 Audio DAC Characteristics
Characteristics
Lo,Ro pin output impedance
Noise distortion factor
S/N ratio
Dynamic range
Crosstalk
Analog output amplitude
Stop band Attenuation = -60dB, In band ripple = below +/- 0.025dB
This characteristic is the characteristic at the time of 1x Playback mode.
Test circuit 1: The application circuit shown in the following example is used.
TC94B14MFG
Application circuit
LPF: Filter incorporated in the SHIBASOKU distortion meter 725D.
Distortion meter: SHIBASOKU 725D or equivalent.
Characteristics
THD + N, CT
S/N, DR
Application circuit example
3.3V
16.9344MHz
Test
Symbol
Circuit
Zo
THD + N (1)
THD + N (2)
S/N (1)
DR
CT
DACout
Lout
Rout
Distortion Filter Setting:
A-weight
OFF
ON
TC94B14MFG
TC94A93MFG
XVDD3
DVSS3R
Ro
Xi
DVDD3R
Xo
DVDD3L
Lo
XVSS3 DVSS3L
Test Condition
-
1 kHz sine wave,
full scale input.
1
10 kHz sine wave,
full scale input.
1 Internal zero detection on
1 kHz sine wave,
1
−60 dB input conversion
1 kHz sine wave,
1
full scale input.
1 kHz sine wave,
1
full scale input.
20 kHz
Distortion
ideal LPF
A-weight: IEC-A or
equivalent
3.3uF
3.3V
3.3uF
27
TC94B14MFG
Min Typ.
⎯
2
⎯ −88
⎯ −93
93 101
90 98
⎯ −97
780 820
meter
2010-01-12
Max Unit
⎯
kΩ
−80
dB
−78
⎯
dB
⎯
dB
−90
dB
860 mVrms