Sanyo LA9239T Specifications

Ordering number : ENN7131

11502RM (OT) No. 7131-1/9

Overview

The LA9239T is a CD-ROM digital servo RF IC that supports high-speed CD-ROM drive replay of up to 48×. It also supports RW disks by featuring an on-chip servo VCA and gain switch.

Functions

• RF amplifier (with AGC)

• RF gain amplifier (supporting CD-RW disk replay)

• RF equalizer (7 modes)

• RF hold function

• PH/BH detection

• 3T extraction circuit

• FE amplifier (built-in balance adjustment VCA)

• TE amplifier (built-in balance adjustment VCA)

• servo signal VCA circuit

• APC circuit (with laser power-up function)

• sleep function

Features

The LA9239T is an IC that features on-chip functions for improved playability and an RF equalizer, resulting in superior performance and a reduced need for external components.

Package Dimensions

unit: mm

3253-TSSOP36

7.6

5.6

(0.5)

(1.0)

9.95

0.5

1.0

0.15

36 19

0.22

0.725

0.8

1.2max

SANYO: TSSOP36

[LA9239T]

LA9239T

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

48× CD-ROM Digital Servo RF IC

Monolithic Linear IC

Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.

Parameter Symbol Conditions Ratings Unit

Maximum power supply voltage V

max 7V Allowable power dissipation Pd max 300 mW Operating temperature Topr –25 to +70 °C Storage temperature Tstg –40 to +150 °C

Specifications

Maximum Ratings at Ta = 25°C, Pins 4 and 31 = GND

Parameter Symbol Conditions Ratings Unit

Recommended power supply voltage V

Allowable operating voltage range V

op 4.5 to 5.5 V

Operating Conditions at Ta = 25°C

No. 7131-2/9

LA9239T

Parameter Symbol Conditions

Ratings

Unit

min typ max

Current drain I

No signal 18 30 42 mA

Current drain (during sleep) I

CCS

No signal, EQS = 0 V 2 6 10 mA Reference voltage Vref 2.3 2.5 2.7 V Preamplifier offset RFAOost Difference with VR in RFA0 –120 0 +120 mV RF no-signal voltage RFSM FIN1, FIN2 = VR 1.5 1.8 2.3 V RF gain max RFG1 GHS = 0 V 19 21 23 dB RF gain min RFG2 GHS = 0 V 4 6 8 dB RF gain UP RFGUP GHS = 5 V 12.5 14 15.5 dB

RFSM difference when FIN1, 2: 350 mVp-p, RFEQ normal RFEQN f = 1 MHz and 350 mVp-p, f = 100 kHz, 1.5 3.5 5.5 dB

EQS = 5 V, BHC = 2.45 V, PHC = 2.8 V

RFSM difference when FIN1, 2: 350 mVp-p, RFEQ CAV1 RFEQ1 f = 2.4 MHz and 350 mVp-p, f = 100 kHz, 1 3 5 dB

EQS = 4.1 V, BHC = 2.45 V, PHC = 2.8 V

RFSM difference when FIN1, 2: 350 mVp-p, RFEQ CAV2 RFEQ2 f = 4.4 MHz and 350 mVp-p, f = 100 kHz, 1 3 5 dB

EQS = 3.4 V, BHC = 2.45 V, PHC = 2.8 V

RFSM difference when FIN1, 2: 350 mVp-p, RFEQ CAV3 RFEQ3 f = 6 MHz and 350 mVp-p, f = 100 kHz, 1 3 5 dB

EQS = 2.8 V, BHC = 2.45 V, PHC = 2.8 V

RFSM difference when FIN1, 2: 350 mVp-p, RFEQ CAV4 RFEQ4 f = 8 MHz and 350 mVp-p, f = 100 kHz, 1 3 5 dB

EQS = 2.2 V, BHC = 2.45 V, PHC = 2.8 V

RFSM difference when FIN1, 2: 350 mVp-p, RFEQ CAV5 RFEQ5 f = 12 MHz and 350 mVp-p, f = 100 kHz, 1 3 5 dB

EQS = 1.6 V, BHC = 2.45 V, PHC = 2.8 V

RFSM difference when FIN1, 2: 350 mVp-p, RFEQ CAV6 RFEQ6 f = 30 MHz and 350 mVp-p, f = 100 kHz, 0.5 2.5 4.5 dB

EQS = 0.9 V, BHC = 2.45 V, PHC = 2.8 V RF hold RFHLD FIN1, 2: 700 mVp-p, f = 100 kHz, RHLD = 5 V –13.5 –11 –8.5 dB PH PH RFSM = 1.7 Vp-p 2.7 3.3 3.9 V 3T extraction 3TON Difference with RFSM for 3TON = 5 V, PH –20 –16.5 –13 dB BH BH RFSM = 1.7 Vp-p 1.3 1.6 1.9 V BH band switch BHH f = 100 kHz, RHH = 5 V 7 9 11 dB REFL offset REFLost Difference with VR for REFL –120 0 +120 mV REFL gain 1 REFL1 FIN1 = Vin, FIN2 = VR, SGC = 2 V 9 11 13 dB REFL gain 2 REFL2 FIN1 = Vin, FIN2 = VR, SGC = 3 V 14.5 16.5 18.5 dB FE offset FEost Difference with VR for FE –120 0 +120 mV FE gain 1 FEG1 FIN1 = Vin, FIN2 = VR, SGC = 2 V, FBAL = VR 5 7 9 dB FE gain 2 FEG2 FIN1 = Vin, FIN2 = VR, SGC = 3 V, FBAL = VR 10 12 14 dB FE balance 1 FBAL1 FIN1 = Vin, FIN2 = VR, SGC = VR, FBAL = 2 V 10.5 12.5 14.5 dB FE balance 2 FBAL2 FIN1 = Vin, FIN2 = VR, SGC = VR, FBAL = 3 V 7.5 9.5 11.5 dB TE offset TEost Difference with VR for TE –120 0 +120 mV TE gain 1 TEG1 E = Vin, F = VR, SGC = 2 V, TBAL = VR 13.5 15.5 17.5 dB TE gain 2 TEG2 E = Vin, F = VR, SGC = 3 V, TBAL = VR 19 21 23 dB TE balance 1 TBAL1 E = Vin, F = VR, SGC = VR, TBAL = 2 V 20 22 24 dB TE balance 2 TBAL2 E = Vin, F = VR, SGC = VR, TBAL = 3 V 16 18 20 dB TS offset TSost Difference with VR for TS –120 0 +120 mV TS gain 1 TSG1 GHS = 0 V, TBAL = VR 13 15 17 dB TS gain 2 TSG2 GHS = 5 V, TBAL = VR 25 27 29 dB TS band 1 TSHL TE-TE- = 82 P, TSH = 0 V 16 20 24 kHz TS band 2 TSHH TE-TE- = 82 P, TSH = 5 V 240 300 360 kHz APC reference voltage 1 LDSL LSD voltage for LDD = 3 V, LDON = 0 V 175 190 205 mV APC reference voltage 2 LDSH LSD voltage for LDD = 3 V, LDON = 5 V 215 230 245 mV APC off voltage LDD LDON = VR 4 4.3 5 V

Operating Characteristics at Ta = 25°C, VCC(Pins 23, 34) = 5 V, GND (Pins 4, 31) = 0 V

No. 7131-3/9

LA9239T

Explanation of Operation

(1) RF amplifier

The RF signal is generated by inputting (A+C) from FIN2 (pin 8) and (B+D) from FIN1 (pin 7) and adding the two. The EFM signal is output from the RFSM (pin 33) via the preamplifier, gain switch, RFAGC circuit, and 3T compensation circuit. The RFSUM output D range is 1 to 4 V. 3T compensation can be done according to the band through the EQS (pin 18) control pin.

The gain switch enables replay of CD and CD-RW disks, and when GHS (pin 16) level is made Hi (CD-RW mode), a gain of 14 dB can be obtained. In the CD mode, the gain is 0 dB.

The on-chip AGC circuit has a variable range of ±6 dB. The peak level controls the RFAGC level, and the bottom level controls the DC level of RF. The respective frequency response characteristics can be changed with the external capacitors connected to PHC (pin 2) and BHC (pin 1).

The response frequency is proportional to the capacitance of the PHC and BHC capacitors. When a defect is detected in the DSP, AGC control can be changed to the hold status (by making RHLD (pin 32) Hi)

to prevent the RF signal from becoming unstable.

(2) Focus error amplifier

The focus error signal is generated by inputting (A+C) to FIN2 (pin 8) and (B+D) to FIN1 (pin 7), passing these signals through the focus balance adjustment VCA, and extracting the difference between the two ((B+D)–(A+C)). The FE signal is gain controlled by FE-VCA and output to FE (pin 28). The FE signal gain can be set with the resistor connected between FE and FE- (pin 29).

The focus balance adjustment VCA is controlled by FBAL (pin 21), and FE-VCA is controlled by SGC (pin 19). A gain of +12 dB for the FE signal gain is obtained in the RW mode by making the GS level Hi.

Note: The polarity of the FE output in relation to the FIN1 input is common-mode output.

(3) Tracking error amplifier

The tracking error signal is generated through input to E (pin 9) and F (pin 10), passing the signals through the tracking balance adjustment VCA, and detecting their difference. The TE signal is gain controlled at TE-VCA and output from TE (pin 26). The TE signal gain can be set with the resistor connected between TE and TE- (pin 27). The tracking balance adjustment VCA is controlled by TBAL (pin 20), and TE-VCA is controlled by SGC (pin 19).

The TE signal for the TES comparator is output from TS (pin 23). The TS signal level must meet the TES comparator level in the DSP. Setting of this level is performed with the pickup output and the resistor between the E and F inputs. In the RW mode, a gain of +12 dB for TE and TS signal gain is obtained by making the GHS (pin 16) level Hi (same as for RF). An on-chip band switch is also provided to support high-speed seek for the TS signal, which is controlled with TSH (pin 22). The band can be set with the capacitance between TSS (pin 25) and TS.

Note: The polarity of the TE output in relation to the E input is inverted output, and the polarity of the TS output in

relation to the E input is also inverted output.

(4) APC (auto laser power control)

The APC controls the pickup laser power. Since CD-RW disks are also supported, a laser power-up (+20%) function is also provided. Laser ON/OFF and laser power-up control are performed with LDON (pin 15).

(5) REFL detection (reflected light detection) and focus detection

The reflected light amount signal from the disk is added to the FIN1 and FIN2 inputs (A+B+C+D) and fetched. It is then gain controlled at REFL-VCA and output from REFL (pin 30) to the DSP. This output signal is used to control SGC (pin 19) to secure the D range of the servo signal in relation to disk irregularities. The amount of light is judged by the DSP and SGC control is performed. REFL-VCA is controlled by SGC. During RW replay, the REFL gain is increased by 12 dB (GHS = Hi).

The REFL signal is also used as a signal for focus detection. Note: The polarity of the REFL output in relation to the FIN1 input is common-mode output.

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