Digital Servo Head Amp
www.DataSheet4U.com
TA2157F/FN
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2157F,TA2157FN
Digital S...
Description
www.DataSheet4U.com
TA2157F/FN
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2157F,TA2157FN
Digital Servo Head Amp for CD System
TA2157F/FN is a digital servo head amp for a 3-beam pickup used in CD systems. Gain for RF signal generation amp can be freely set, supporting CD-RW. Combining with single-chip processor TC94A14F/FA/FB, a CMOS digital servo, makes configuring CD systems simple.
TA2157F
Features
· · · · · · · · · · Low power dissipation digital servo head amp Built-in amplifier for generating reference voltage (VRO) Built-in auto laser power control (APC) amplifier Built-in RF amplifier Built-in RF signal automatic gain control (AGC) amplifier Built-in gain change circuit for CD-RW Built-in focus error and tracking error signal amplifiers Built-in track count signal amplifier Normal-, double-, and ×4-speed operation 24-pin mini flat package Weight SSOP24-P-300-1.00: 0.3 g (typ.) SSOP24-P-300-0.65A: 0.17 g (typ.)
TA2157FN
1
2002-11-21
TA2157F/FN
Block Diagram
GVSW 13
PEAK 20 kW 20 kW 50 kW 40 mA 20 kW 10 pF 40 kW 15 kW
12 RFDC
VRO 14
11 TEO
FEO 15 40 kW 10 pF 15 kW 20 kW
20 kW
10 TEN
FEN 16 20 kW RFRP 17
50 mA 12 kW 12 kW 1.3 V 2 kW 50 kW
9 TEBC
8 SEL
40 kW
RFRPIN 18
20 kW BOTTOM PEAK
1 kW 14 kW 2 kW
7 LDO
RFGO 19 240 kW 15 pF RFGC 20 240 kW 15 pF AGCIN 21 AGC Amp. 180 kW 40 pF
1.75 kW 0.5 k ´´ 2 1 ´0.5 ´2 94 kW
6 MDI
5 TNI
4 TPI
RFO 22
60 kW
22 kW 94 kW 22 kW
3 FPI
180 kW RFN 23 3 kW GND 24 3 kW 40 pF
60 kW
2 FNI
...
Similar Datasheet