TA2157FN

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 ...