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 TA2157FN Weight SSOP24-P-300-1.00: 0.3 g (typ.) SSOP24-P-300-0.65A: 0.17 g (typ.) 1 2002-11-21 TA2157F/FN Block Diagram PEAK GVSW 13 12 RFDC 20 kW 20 kW 50 kW VRO 14 15 kW 11 TEO 40 mA 10 pF 40 kW 20 kW 20 kW 10 pF 15 kW FEN 16 20 kW 40 kW FEO 15 9 TEBC 50 mA 12 kW 2 kW 1.3 V RFRP 17 40 kW 12 kW RFRPIN 18 10 TEN 20 kW 50 kW 8 SEL 20 kW BOTTOM PEAK 1 kW RFGO 19 1.75 kW 240 kW 15 pF RFGC 20 240 kW 15 pF AGC Amp. RFO 22 40 pF 180 kW AGCIN 21 60 kW RFN 23 k ´0.5 ´2 5 TNI 1 ´0.5 ´2 4 TPI 22 kW 3 FPI 94 kW 22 kW 40 pF 3 kW 6 MDI 94 kW 60 kW 180 kW 3 kW GND 24 7 LDO 14 kW 2 kW 2 FNI 1 VCC PIN VCTRL SEL (APC SW) TEB (TE BAL) RFGC (AGC Gain) GVSW VCC APC ON -50% +12dB Normal mode (0dB) HiZ APC ON 0% +6dB Normal mode (0dB) GND APC OFF (LDO = H) +50% 0dB CD-RW mode (+12dB) 2 2002-11-21 TA2157F/FN Pin Function Pin No. Symbol I/O 1 VCC ¾ 2 FNI I Function Description Internal Circuit ¾ 3.3 V power supply pin 22 kW Main-beam amp input pin 2 1 kW FPI I Main-beam amp input pin 4 TPI I Sub-beam amp input pin 4 100 W VC 2 mA 3 120 mA 3 VC MDI I Monitor photo diode amp input pin 6 1.75 kW 14 kW 2 kW 6 4 mA Sub-beam amp input pin 2 mA I 20 mA TNI 2 mA 5 4 mA 5 ON: LD-OFF OFF: LD-ON 7 SEL 8 SEL I APC Circuit LDO 8 GND OFF Connected to VCC through 1 kW resistor HiZ ON Control signal output VCC ON Control signal output 3 50 kW 30 kW APC circuit ON/OFF control signal, laser diode (LDO) control signal input or bottom/peak detection frequency change pin. ON/OFF 1 kW 40 kW Laser diode amp output pin 30 kW 40 kW O 80 mA LDO 50 kW 7 2002-11-21 TA2157F/FN Symbol I/O Function Description Internal Circuit 40 kW Pin No. Tracking error balance adjustment signal input pin TEBC I 9 15 kW 40 kW 9 Adjusts TE signal balance by eliminating carrier component from PWM signal (3-state output, PWM carrier = 88.2 kHz) output from TC94A14F/FA/FB TEBC pin using RC-LPF and inputting DC. 10 TEN I 40 mA TEBC input voltage: GND~VCC Tracking error signal generation amp negative-phase input pin 167 W 10 pF 10 Tracking error signal generation amp output pin. O 12 RFDC O VC Combining TEO signal and RFRP signal with TC94A14F/FA/FB configures tracking search system. 20 mA TEO 167 W 400 mA 11 11 20 kW 20 mA 15 kW 40 mA 500 W 50 kW 12 RF signal peak detection output pin I CD-RW 13 HiZ Normal VCC 4 40 kW GND 30 kW 40 kW GVSW Mode 50 kW 13 GVSW 30 kW AGC/FE/TE amp gain change pin 60 mA VC 2002-11-21 TA2157F/FN 14 VRO O 15 FEO O Function Description Internal Circuit Reference voltage (VRO) output pin · VRO = 1/2 VCC when VCC = 3.3 V 14 10 kW 40 mA I/O 20 W Symbol 20 W Pin No. Focus error signal generation amp output pin 167 W 10 pF 15 16 I Focus error signal generation amp negative-phase input pin VC 20 mA FEN 167 W 400 mA 16 Signal amp output pin for track count RFRP O Combining RFRP signal and TEO signal with TC94A14F/FA/FB configures tracking search system. 17 3 pF 333 W 20 kW 18 33 pF 1 kW VC 1.5 mA Signal generation amp input pin for track count 33 pF I 1 mA RFRPIN 40 kW 18 1.5 mA 1 mA 17 15 kW 5 2002-11-21 TA2157F/FN Pin No. Symbol I/O Function Description Internal Circuit 0.2 pF RF signal amplitude adjustment amp output pin 19 1.2 V O 20 kW 240 mA RFGO 1.6 mA 19 300 W 40 mA RF amplitude adjustment control signal input pin I 20 40 kW 100 mA · RFGC input voltage : GND~VCC 100 mA RFGC 20 kW 20 Adjusts RF signal amplitude by eliminating carrier component from PWM signal (3-state output, PWM carrier = 88.2 kHz) output from TC94A14F/FA/FB RFGC pin using RC-LPF and inputting DC. 20 kW VC 15 kW 21 AGCIN I RF signal amplitude adjustment amp input pin 21 15 kW 15 kW RFO O RF signal generation amp output pin 22 300 W 1.2 mA 22 VC 60 mA 60 mA 20 kW 23 RFN I 3 kW RF signal generation amp input pin 3 kW 24 GND ¾ 240 mA 23 120 W VC ¾ GND pin 6 2002-11-21 TA2157F/FN Maximum Ratings (Ta = 25°C) Characteristics Supply voltage Symbol Rating VCC 5 TA2157F Power dissipation TA2157FN Unit V 600 PD mW 500 Operating temperature Topr -40 ~ +85 °C Storage temperature Tstg -55 ~ +150 °C Note 1: TA2157F: Derated above 25°C in the proportion 4.76 mW/°C. TA2157FN: Derated above 25°C in the proportion 4 mW/°C. Electrical Characteristics (unless otherwise specified, VCC = 3.3 V, VRO = 1.65 V, Ta = 25°°C, RFGC = VRO, GVSW = VCC) Symbol Test Circuit Test Condition Min Typ. Max Unit Assured power supply voltage VCC ¾ ¾ 3.0 3.3 3.6 V Power supply current (normal mode) ICC1 GVSW = VCC 13 19 25 Power supply current (CD-RW mode) ICC2 GVSW = GND 12 18 24 1.55 1.65 1.75 DV = -0.1 V 3 ¾ ¾ DV = +0.1 V 3 ¾ ¾ ¾ 200 ¾ V/V 170 178 186 mV Characteristics Power supply Reference voltage Reference Output current voltage Input current RF FPI (FNI) ® RFO VRO IOH IOL ¾ ¾ SEL = HiZ TEBC = HiZ RFGC = HiZ mA When VCC = 3.3 V V mA GVAPC ¾ f = 1 kHz VMDI ¾ VLDO = VCC - 1.3 V VLDOP ¾ VCC reference, SEL = GND -0.75 -0.7 ¾ V Input bias current IIAPC ¾ VMDI = 178 mV -200 -50 0 nA Transfer resistance 1 (normal mode) Rt1RF 74 85 95 Transfer resistance 2 (CD-RW mode) Rt2RF f = 100 kHz Rf = 12 kW GVSW = VCC ¾ GVSW = GND 325 370 414 Frequency characteristic 1 (normal mode) fC1RF GVSW = VCC ¾ 13 ¾ Voltage gain APC MD ® LDO ¾ Operating reference voltage LD off voltage ¾ Frequency characteristic 2 (CD-RW mode) fC2RF Output slew rate SRRF Upper limit output voltage VOHRF Lower limit output voltage VOLRF Permissive load resistance RLMRF kW -3dB point Rf = 12 kW MHz GVSW = GND ¾ CRFO = 20 pF ¾ GND reference ¾ ¾ 7 ¾ 8 ¾ ¾ 35 ¾ 2.2 2.4 ¾ ¾ 0.2 0.4 5 10 ¾ V/ms V kW 2002-11-21 TA2157F/FN AGC AGCI ® RFGO FE FPI (FNI) ® FEO Characteristics Symbol Voltage gain 1 GV1AG Voltage gain 2 GV2AG Voltage gain 3 GV3AG Frequency characteristic 1 fC1AG Frequency characteristic 2 fC2AG Frequency characteristic 3 fC3AG Output slew rate SRAG Upper limit output voltage VOHAG Lower limit output voltage VOLAG Permissive load resistance RLMAG Transfer resistance 1 (normal mode) Rt1FE Transfer resistance 2 (CD-RW mode) Rt2FE Gain balance 1 (normal mode) GB1FE Gain balance 2 (CD-RW mode) GB2FE ¾ ¾ Test Condition f = 1 MHz -3dB point ¾ CRFO = 20 pF ¾ GND reference Min Typ. Max RFGC = GND -1.5 -0.5 0.5 RFGC = HiZ 5.5 6.5 7.5 RFGC = VCC 12 13.5 15 RFGC = GND ¾ 15 ¾ RFGC = HiZ ¾ 15 ¾ RFGC = VCC ¾ 15 ¾ ¾ 25 ¾ 2.2 2.4 ¾ ¾ 0.2 0.4 ¾ ¾ 5 10 ¾ GVSW = VCC f = 1 kHz RFIN = 47 kW RFEFB = 33 kW GVSW = GND 127 145 162 ¾ 545 620 694 GVSW = VCC, DRt1FE -1 0 +1 GVSW = GND, DRt2FE -1 0 +1 fC1FE GVSW = VCC ¾ 20 ¾ Frequency characteristic 2 (CD-RW mode) fC2FE GVSW = GND ¾ 20 ¾ GVSW = VCC -50 0 +50 ¾ VOS1FE ¾ Output offset voltage 2 (CD-RW mode) VOS2FE Upper limit output voltage VOHFE Lower limit output voltage VOLFE Permissive load resistance RLMFE ¾ Unit dB MHz V/ms V kW kW ¾ Frequency characteristic 1 (normal mode) Output offset voltage 1 (normal mode) Test Circuit dB -3dB point RFEFB = 33 kW VRO reference FPI/FNI open kHz mV GVSW = GND GND reference ¾ ¾ 8 -100 0 +100 2.9 3.1 ¾ ¾ 0.1 0.3 5 10 ¾ V kW 2002-11-21 TA2157F/FN Characteristics Symbol Transfer resistance 1 (normal mode) Rt1TE Transfer resistance 2 (CD-RW mode) Rt2TE Gain balance adjustment width TE TPI (TNI) ® TEO H (DA) DRt1 L (DA) DRt2 Gain balance 1 (normal mode) GB1TE Gain balance 2 (CD-RW mode) GB2TE RFDC FNI (FPI) ® RFDC RFRP RFRPIN ® RFRP Test Condition Min Typ. Max 411 468 525 ¾ f = 1 kHz GVSW = VCC TERFB = 39 kW RTIN = 47 kW GVSW = GND TEBC = HiZ 1647 1872 2092 TEBC = GND +40 +50 +60 TEBC = VCC -60 -50 -40 GVSW = VCC, DRt1FE -1 0 +1 GVSW = GND, DRt2FE -1 0 +1 GVSW = VCC ¾ 40 ¾ GVSW = GND ¾ 40 ¾ GVSW = VCC -50 0 +50 ¾ GVSW = VCC fC1TE Frequency characteristic 2 (CD-RW mode) fC2TE ¾ VOS1TE ¾ Output offset voltage 2 (CD-RW mode) VOS2TE Upper limit output voltage VOHTE Lower limit output voltage VOLTE Permissive load resistance RLMTE Detection frequency fCDC Operating reference voltage 1 VOP1DC ¾ ¾ Operating reference voltage 2 VOP2DC Upper limit output voltage VOHDC ¾ % dB -3dB point RTEFB = 39 kW VRO reference TPI/TNI open kHz mV GVSW = GND GND reference ¾ ¾ Unit kW ¾ Frequency characteristic 1 (normal mode) Output offset voltage 1 (normal mode) Test Circuit ¾ -3dB point at low-frequency with output amplitude = 0dB when RFO = 1.2 Vpp/350 kHz in relation to VOP1DC FNI/FPI open, VRO reference, RFN-Vcc = 47 kW VRO reference, RFO = 1.2 Vpp/350 kHz RFN-Vcc = 47 kW GND reference -150 0 +150 2.9 3.1 ¾ ¾ 0.1 0.3 5 10 ¾ kW ¾ 15 ¾ kHz -0.15 0 0.15 V V 0.6 0.75 0.9 2.9 3.1 ¾ ¾ 0.3 0.5 5 10 ¾ kW V Lower limit output voltage VOLDC Permissive load resistance RLMDC ¾ Voltage gain GVRP ¾ AMP gain after detection ¾ 4.4 ¾ dB Detection frequency fCRP ¾ -3dB point at low-frequency with output amplitude = 0dB when RFO = 1.2 Vpp/700 kHz in relation to VOP1RP ¾ 35 ¾ kHz Detection time constant TRP ¾ 1.2 VPP/5 kHz square wave (Cin > 1 mF) ¾ 37 ¾ V/ms VRO reference, no input -1.0 -0.85 -0.7 VRO reference, RFO = 700 kHz, 1.2 Vpp 0.7 0.85 1.0 GND reference 2.9 3.1 ¾ V 5 10 ¾ kW Operating reference voltage 1 VOP1RP Operating reference voltage 2 VOP2RP Upper limit output voltage VOHRP ¾ Permissive load resistance RLMRP ¾ ¾ ¾ V ¾ Note 2: (DA) : Normal mode Note 3: If the IC is used abnormally (ex, wrongly mounted), it may be damaged or destroyed. 9 2002-11-21 TA2157F/FN Test Methods (supplementary) Note: Due to the relation with RFRP detection frequency, use feed search (track cross speed) at 80 kHz or less. 1. Test method for RFRP detection frequency characteristic and detection time constant (1) Detection frequency Set to 0dB the maximum output amplitude of the RFRP pin in relation to the operating reference voltage 1 (VOP1RP) when the sine wave shown in the figure below is input via a capacitor (Cin > 1 mF) to the RFRPIN pin and specify a frequency whose amplitude is -3dB. RFRPIN input: 1.2 Vpp RFRP output amplitude: [V] Specify by amplitude Set this amplitude equivalent to -3dB to 0dB Operating reference voltage 1 (VOP1RP) 35 Detection frequency RFRPIN input frequency [kHz] (2) Detection time constant Specify the time constant for peak and bottom detection frequencies when the square wave shown in the figure below is input via a capacitor (Cin > 1 mF) to the RFRPIN pin at the slew rate of the RFRP pin output sawtooth wave. RFRPIN input: 1.2 Vpp f = 5 kHz (SEL = HiZ or VCC) RFRP output Specify by slew rate here 37 V/ms (SEL = HiZ or VCC) 10 2002-11-21 TA2157F/FN Test Circuit RFDC 12 PEAK 20 kW 20 kW 50 kW TEO 11 40 mA 20 kW 40 kW RFGO 19 12 kW 0.1 mF AGCIN 21 1.75 kW 240 kW 15 pF AGC Amp. RFO 22 RFN 23 180 kW 3 kW GND 24 k ´0.5 ´2 1 ´0.5 ´2 94 kW 60 kW 60 kW 47 kW LDO 7 14 kW 2 kW 240 kW 15 pF 22 kW 94 kW 22 kW 40 pF TEBC SEL 8 50 kW 1 kW RFGC 20 RFGC 40 kW 1.3 V 12 kW 20 kW BOTTOM PEAK TEN 10 TEBC 9 2 kW 180 kW RFI 0.1 mF RFRPIN 18 20 kW 50 mA 12 kW RFRP 17 RFRP/RFZI 20 kW 15 kW 40 pF FEN 16 20 kW 10 pF 33 kW FEI 10 pF 40 kW FEO 15 TEI/TEZI MDI 6 SEL 10 W VREF/PVREF 15 kW 39 kW VRO 14 100 mF GVSW 13 10 mH PD TNI 5 47 kW TPI 4 47 kW FPI 3 FNI 2 LD VC F 47 kW 47 kW 47 kW 47 kW E D C B A VCC 1 3 kW 11 2002-11-21 TA2157F/FN Package Dimensions Weight: 0.3 g (typ.) 12 2002-11-21 TA2157F/FN Package Dimensions Weight: 0.17 g (typ.) 13 2002-11-21 TA2157F/FN RESTRICTIONS ON PRODUCT USE 000707EBA · TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc.. · The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk. · The products described in this document are subject to the foreign exchange and foreign trade laws. · The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. · The information contained herein is subject to change without notice. 14 2002-11-21