Philips tza1027 DATASHEETS
INTEGRATED CIRCUITS
DATA SH EET
TZA1027
Analog current buffer for CD-R and
CD-RW systems
Preliminary specification
File under Integrated Circuits, IC01
1999 Sep 17
Philips Semiconductors Preliminary specification
Analog current buffer for CD-R and CD-RW
TZA1027
systems
FEATURES
• Eight amplifiers for servo and power calibration
functions
• Gain selector for CD-R and CD-RW discs
• Separate dataamplifier for read speed up to thirty times
nominal data speed.
GENERAL DESCRIPTION
The TZA1027 is an analog current buffer IC for CD-R and
CD-RW systems with a 3-spot push-pull tracking system.
The IC interfaces directly to the photo diodes and
TZA1020. A HF current amplifier is implemented to detect
the actual HF data signal.
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
I
i(cd)
I
i(sd)
B
t
d(f)
G
T
DD
CAHF
SS
amb
supply voltage 4.5 5.0 5.5 V
central diode input current WRON = 1 0 − 3400 µA
satellite diode input current WRON = 1 0 − 520 µA
bandwidth Ci= 5 pF 72 −−MHz
flatness delay Ci= 5 pF; f = 0.1 to 32 MHz − 30 200 ps
servo satellite detector gain HG = 1 − 32 −
HG=0 − 8 −
ambient temperature 0 − 70 °C
ORDERING INFORMATION
TYPE
NUMBER
NAME DESCRIPTION VERSION
PACKAGE
TZA1027HL LQFP32 plastic low profile quad flat package; 32 leads; body 5 × 5 × 1.4 mm SOT401-1
1999 Sep 17 2
Philips Semiconductors Preliminary specification
Analog current bufferforCD-R and CD-RW
systems
BLOCK DIAGRAM
handbook, full pagewidth
A1
A2
B1
B2
TZA1027
TZA1027
237
A1LF
282
A2LF
246
B1LF
273
B2LF
C1
C2
C3
C4
n.c.
PDWN
WRON
HG
1
8
5
4
9, 10, 11, 12,
17, 20, 32
21
31
GAIN
SELECTOR
30
16
V
DDA
+
15 13 14
V
AGND
DDD
DGND
29
C1LF
22
C2LF
25
C3LF
26
C4LF
19
CAHF
18
HFGND
MGR881
Fig.1 Block diagram.
1999 Sep 17 3
Philips Semiconductors Preliminary specification
Analog current bufferforCD-R and CD-RW
systems
PINNING
SYMBOL PIN DESCRIPTION
C1 1 central photo diode current input
A2 2 satellite diode current input
B2 3 satellite diode current input
C4 4 central photo diode current input
C3 5 central photo diode current input
B1 6 satellite diode current input
A1 7 satellite diode current input
C2 8 central photo diode current input
n.c. 9 not connected
n.c. 10 not connected
n.c. 11 not connected
n.c. 12 not connected
AGND 13 analog ground
DGND 14 digital ground
V
DDD
V
DDA
n.c. 17 not connected
HFGND 18 ground connection of CAHF output stage
CAHF 19 central aperture high-frequency output
n.c. 20 not connected
PDWN 21 digital input power-down
C2LF 22 C2 central detector signal output
A1LF 23 A1 satellite detector signal output
B1LF 24 B1 satellite detector signal output
C3LF 25 C3 central detector signal output
C4LF 26 C4 central detector signal output
B2LF 27 B2 satellite detector signal output
A2LF 28 A2 satellite detector signal output
C1LF 29 C1 central detector signal output
HG 30 digital input high gain selection
WRON 31 digital input write on gain selection
n.c. 32 not connected
15 digital power supply
16 analog power supply
TZA1027
1999 Sep 17 4
Philips Semiconductors Preliminary specification
Analog current bufferforCD-R and CD-RW
systems
handbook, full pagewidth
WRON
n.c.
32
HG
C1LF
31
30
29
A2LF
28
B2LF
27
C4LF
26
TZA1027
C3LF
25
C1
A2
B2
C4
C3
B1
A1
C2
1
2
3
4
24
23
22
21
B1LF
A1LF
C2LF
PDWN
TZA1027HL
5
6
7
8
9
n.c.
10
n.c.
11
n.c.
12
n.c.
13
AGND
14
DGND
15
DDD
V
16
DDA
V
20
19
18
17
n.c.
CAHF
HFGND
n.c.
MGR882
Fig.2 Pin configuration.
1999 Sep 17 5
Loading...