TC94A14F Datasheet, PDF (13/17 Pages) Toshiba Semiconductor – Digital Servo Single-Chip Processor for Use in CD Player

7. Data Slicer Circuit
(1) Comparator
Characteristics
Input amplitude
Test
Circuit
Test Condition
¾ V_REF reference
(2) R-2R DAC (digital slicer DAC)
Characteristics
Test
Circuit
Output conversion range
¾
Output impedance
¾
Test Condition
¾
¾
TC94A14F/FA/FB
Min Typ. Max Unit
0.6
1.2
2.0
V_pp
Min Typ. Max Unit
AV_SS3 ¾ AV_DD3 V
¾
2.5
¾
kW
8. Audio DAC Characteristics
Characteristics
Total harmonic distortion + noise
S/N ratio
Dynamic range
Cross talk
Analog output amplitude
Symbol
Test
Circuit
Test Condition
Min
THD + N (1)
1 kHz sine wave, full-scale input ¾
1
THD + N (2)
10 kHz sine wave, full-scale input ¾
S/N (1)
Internal Zero detect = OFF
87
1
S/N (2)
Internal Zero detect = ON
95
DR
1
1 kHz sine wave,
-60dB input conversion
85
CT
1 1 kHz sine wave, full-scale input ¾
DAC out
1 1 kHz sine wave, full-scale input 790
Typ.
-88
-80
92
100
90
-90
820
Max Unit
-80
dB
-75
¾
dB
¾
¾
dB
-85 dB
850 mVrms
Test Circuit 1: Application circuit is used.
TC94A14F/FA/FB
application circuit
Lout
Rout
20 kHz
ideal LPF
Distortion
meter
LPF: Filter with built-in Shibasoku 725D
Distortion meter: Shibasoku 725D equivalent
Characteristic
THD + N, CT
S/N, DR
Distortion Filter Setting
A-weight
OFF
ON
A-weight: IEC-A equivalent
Application Circuit
TC94A14F/FA/FB
3.3 V
XV_DD3
XI
16.9344 MHz
XO
XV_SS3
DV_SS3
RO
270 W 3.3 mF
3.3 V
DV_DD3
DVR
22 mF
270 W 3.3 mF
LO
DV_SS3
R-ch analog output
L-ch analog output
13
2002-11-18