TZA1025T Philips Semiconductors, TZA1025T Datasheet - Page 11

• Manufacturer Part Number: TZA1025T
• Description: Data amplifier and laser supply circuit for CD audio and video optical systems ADALASLC
• Manufacturer: Philips Semiconductors

Philips Semiconductors
The application for the TZA1025 (ADALASLC) with the SAA7325 (CD10LC) without a coupling capacitor is shown in
Fig.7. A minimum supply voltage (V
1998 Oct 30
handbook, full pagewidth
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALASLC)
(1) See equation (3) to calculate the value of this resistor.
(2) Pin CDRW can be controlled by the CD10LC or a microprocessor but can also be fixed or switched by any other means.
(3) The 10 k feedback resistor between pins 9 and 10 is a fixed value.
(4) The high-pass filter (AC-coupling) is placed at the input of the preamplifier. The 3 dB point (f = 10 kHz) is at
(5) The minimum supply voltage (V
OPU
LD
MON
VCOM
D1
D2
D3
D4
S1
S2
Fig.7 Application diagram with SAA7325 (CD10LC) without coupling capacitor.
V DD
100 nF
V DD(LASER)
DD
) without using a coupling capacitor is 2.8 V.
R2 (4 )
C2
10 nF
(4)
DD
PWRON
) is required for optimal performance.
V DD(L)
MON
CFIL
GND
DIN
LD
1
2
3
4
5
6
7
(ADALASLC)
TZA1025
LF FILTER
14
13
12
11
10
11
9
8
RGADJ
V DD
GND
CDRW
RFEQO
RFFB
CMFB
R RGADJ
10 k
(3)
(1)
V DD
1 k
100 nF
(5)
100 nF
47 pF
microprocessor
6
R2
-------------------------------------------- -
from
220 pF
100 nF
HFREF
ISLICE
LDON
4
VRIN
HFIN
C2 F
(2)
D1
D2
D3
D4
S1
S2
Product specification
SAA7325
TZA1025
(CD10LC)
MBK904