cxa1982q Sony Electronics, cxa1982q Datasheet
cxa1982q
Related parts for cxa1982q
cxa1982q Summary of contents
Page 1
... RF Signal Processing Servo Amplifier for CD players For the availability of this product, please contact the sales office. Description The CXA1982Q is a bipolar IC with built-in RF signal processing and various servo ICs player servo can be configured by using this IC, DSP and driver. Features • Low operating voltage (V – ...
Page 2
... I IL •OUTPUT DECODER FS1 to 4 TG1 to 2 TM1 to 7 FZC COMP •TRACKING TG1 TZC COMP •FCS PHASE COMPENSATION DFCT TM1 FS1 FS2 FS4 – 2 – CXA1982Q SENS C.OUT TTL 22 XRST DFCT TTL 21 DATA 20 XLT ...
Page 3
... CXA1982Q Description Focus error amplifier output. Connected internally to the FZC comparator input. Focus error input. Capacitor connection pin for defect time constant. Ground this pin through a capacitor when decreasing the focus servo high-frequency gain ...
Page 4
... CXA1982Q Description External time constant setting pin for generating focus servo waveform. External time constant setting pin for switching tracking high-frequency gain. External time constant setting pin for switching tracking high-frequency gain ...
Page 5
... CPU. 20k 147 Focus OK comparator output. 40k 100k Input for the DEFECT bottom hold output with capacitance coupled. 147 27 DEFECT bottom hold output. 147 26 Connection pin for DEFECT bottom hold capacitor. – 5 – CXA1982Q Description ...
Page 6
... The RF amplifier gain is determined by the resistance connected between this pin and RFO pin. 10k 1k APC amplifier output. 130k 17µ 100k APC amplifier input. 10k RF I-V amplifier inverted input. 147 Connect these pins to the photo diode and pins. 11.6k 100µ – 6 – CXA1982Q Description ...
Page 7
... CXA1982Q Description Bias adjustment of focus error amplifier. F I-V and E I-V amplifier inverted input. Connect these pins to photo diodes F and E. I-V amplifier E balance adjustment. Tracking error amplifier output. E-F signal is output. ...
Page 8
... O 48 Equivalent circuit Tracking error input. 100k 147 147 Capacitor connection pin for defect time constant. 1k 100k Window comparator input for ATSC detection. 100k 1k 10k Tracking zero-cross comparator input. 75k 120 50 (V 120 VC – 8 – CXA1982Q Description + V )/2 DC voltage output ...
Page 9
... RF amplifier FE – 9 – amplifier TE APC VC CXA1982Q ...
Page 10
... FCS – 10 – servo TRK FOK CXA1982Q ...
Page 11
... Sled MIRR DEFECT – 11 – CXA1982Q ...
Page 12
... Vcc EE V2 22k S12 100k S11 200k – 12 – CXA1982Q 3300p Vcc SENS 10k 23 Vcc C. OUT 10k 22 XRST XRST 21 DATA DATA XLT 20 XLT CLK 19 CLK A Vcc 18 Vcc ISET 17 ...
Page 13
... FE_BIAS TEO NC TEI ATSC TZC TDFCT 22k 100k 0.033µ Vcc – 13 – CXA1982Q 26 25 DSP 24 SENS 23 DSP C. OUT MICRO- XRST 22 COMPUTER DATA 21 DSP DSP XLT 20 CLK 19 DSP Vcc 18 Vcc 120k ISET ...
Page 14
... VC 10k VB PD2 IV AMP VC = 2.2 RFO 25p 174k 32k FE AMP 32k 25p 87k 164k VC FE_BIAS 47k = 5.4 (V – (iPD2 – iPD1) FEO A B – 14 – CXA1982Q equivalent 22k RF_M RF_O 31 FOK DEFECT RF SUMMING AMP ( 127.6k (iPD1 + iPD2 FEO 315k . ...
Page 15
... E I-V AMP feedback resistance = R Gain adjustment is performed by adjusting external variable resistor of TEO pin 260k 12p TE AMP 30k 96k VF 30k 260k 12p 403k (Rx = R1// – 15 – CXA1982Q 42 TEO ...
Page 16
... When driving a constant current, the optical output by the laser diode possesses large negative temperature characteristics. Therefore, the current must be controlled with the monitor photo diode to ensure the output remains constant. 130k 100k 34 PD 33k 27k 60k 2k 15k 80k 8k 1.25V 4k – 16 – CXA1982Q Vcc 100µ /6. 10µ GND EE ...
Page 17
... Pin 11. FE FZC FS4 68k Focus 100k phase Compensation 50k 40k 50k FS2 FLB FSET SRCH 0.1µ 510k 0.01µ 4.7µ and VC (Pin 48 – 17 – CXA1982Q FOCUS COIL FE_O 6 100k FE_M 7 11µ 22µ ISET 120k 17 FS1 resistance; however, is – VC) 15%. CC ...
Page 18
... ATSC 1k TM4 100k 11µA TM3 11µA 20k 10k 90k Tracking Phase Compensation TM7 FSET 11 510k 0.01µ feedback resistance value feedback resistance – 18 – CXA1982Q SLED MOTOR SL_O M 16 SL_M 15 8.2k SL_P TM2 14 3.3µ 82k 22µ 100k TA_M 15k 12 TRACKING COIL TA_O 13 ...
Page 19
... DEFECT DEFECT 54k 1 VG 15k 92k 0.625V FOCUS OK COMPARATOR – V –0.37V. RFI RFO 0.033µ CC1 CC2 27 26 DEFECT COMPARATOR DEFECT BOTTOM HOLD 28 CB 0.01µ – 19 – CXA1982Q V CC 20k 25 FOK SENS d DEFECT SW d BOTTOM HOLD (2) dotted line CC2 H L ...
Page 20
... High; and when a defect is detected High. The mirror hold time constant must be sufficiently large compared with the traverse signal. In the CXA1982Q, this mirror output is used only during braking operations, and no external output pin is attached. Accordingly, when connecting DSP such as the CXD2500 with MIRR input pin, input the C. OUT output to the MIRR input of the DSP ...
Page 21
... The input data to operate this IC is configured as 8-bit data; however, below, this input data is represented by 2-digit hexadecimal numerals in the form $XX, where hexadecimal numeral between 0 and F. Commands for the CXA1982Q can be broadly divided into four groups ranging in value from $0X to $2X. 1. $0X (“FZC” at SENS pin (Pin 24)) These commands are related to focus servo control ...
Page 22
... Drive voltage Focus error SENS pin (FZC) Focus Fig. 3. S-curve $03 $08 The instant the signal is brought into focus. Fig. 4. Focus ON timing chart – 22 – CXA1982Q The broken lines in the figure indicate the voltage assuming the signal is not in focus. ...
Page 23
... Transfer $ YES FZC YES TG1, TG2 Break Sled kick circuit height ON/OFF ON/OFF – 23 – CXA1982Q Latch (B) Sled kick height Relative D1 D0 value (PS1) (PS0) ± ± ± ...
Page 24
... CXA1982Q From outer to inner track Fig. 7. Internal waveform Tracking control 00: OFF 01: Servo ON 10: F-JUMP 11: R-JUMP TM1, TM3, TM4 – 24 – CXA1982Q D2 TM7 Low: open BRK High: make (“MIRR”) (“TZC”) Braking is applied from here. D0 Sled control 00: OFF 01: Servo ON ...
Page 25
... Brake Sled OFF = 0 Kick + 2 1 Sled Mode 2 SLED MODE OFF FWD MOVE REV MOVE – 25 – CXA1982Q SENS output D1 D0 FS1 Search FZC Down = 0 Sled DEFECT Kick + 1 2 TZC — ...
Page 26
... CXA1982Q DEFECT E: enable D: disable ...
Page 27
... Focus off, Defect enable, Focus Search off, Focus Search down Tracking Control TG1 – TG2 off, Brake off, Sled Kick + 2 off, Sled Kick + 1 off Tracking Mode Tracking off, Sled off DATA HEXADECIMAL $ $ $20 $ $38 – 27 – CXA1982Q ...
Page 28
... Low gain: A signal, whose resistance is divided between Pins 1 and 2, is input to FE. The external variable resistor of TEO pin is used for TE. The anti-shock circuit always operates in the CXA1982Q so that TG1 and TG2 (address 1 : D3) should be set to 1 for tracking adjustment to prevent this effect. ...
Page 29
... Sled/Tracking internal phase compensation and reference design material Item SD 1.2kHz gain 08 1.2kHz phase 08 1.2kHz gain 25 1.2kHz phase 25 2.7kHz gain 25 13 2.7kHz phase 25 13 Measurement pin Conditions C = 0.1µF FLB 0.1µF FGD 0.1µF TGU – 29 – CXA1982Q Typ. Unit 21 deg 13 dB –125 deg 26.5 dB –130 deg ...
Page 30
... SONY CODE EIAJ CODE JEDEC CODE 48PIN QFP (PLASTIC) 15.3 ± 0.4 + 0.4 12.0 – 0 0.15 0.3 – 0.1 ± 0. 0.35 2.2 – 0.15 PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT QFP-48P-L04 LEAD MATERIAL QFP048-P-1212-B PACKAGE WEIGHT – 30 – CXA1982Q + 0.1 0.15 – 0.05 0.15 + 0.2 0.1 – 0.1 EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.7g ...