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LA9251 Datasheet(PDF) 3 Page - Sanyo Semicon Device |
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LA9251 Datasheet(HTML) 3 Page - Sanyo Semicon Device |
3 / 17 page No. 6125-3/17 LA9251M Continued from preceding page. Parameter Symbol Conditions Ratings Unit min typ max [Spindle Amplifier] Offset 12 SPD12ost At SPD, the difference from VR, SP8 = 0 V: 12 cm mode –40 0 +40 mV Offset 8 SPD8ost At SPD, the difference from VR, SP8 = 3 V: 8 cm mode –40 0 +40 mV Offset off SPDof At SPD, the difference from VR, SP8 = 3 V: 8 cm mode –40 0 +40 mV Output voltage H12 SPD-H12 The difference from offset 12, 0.35 0.50 0.65 V SP8 = 0 V, 12 cm mode, CLV = 3 V Output voltage H8 SPD-H8 The difference from offset 8, 0.10 0.20 0.30 V SP8 = 3 V, 8 cm mode, CLV = 3 V [Sled Amplifier] Offset SLD SLDost SLEQ = VR, the difference from VR –80 0 +80 mV Offset off SLDof SLOF = High –40 0 +40 mV SLC no-signal voltage SLCo SLC 1.0 1.5 2.0 V Shock no-signal voltage SCIo SCI, the difference from VR –40 0 +40 mV Shock detection voltage (high) SCIvthH SCI, the difference from VR 90 140 190 mV Shock detection voltage (low) SCIvthL SCI, the difference from VR –190 –140 –90 mV The difference between the LF2 voltage when DEF is DEF detection voltage DEFvth detected with RF = 1.9 V and the LF2 voltage when 0.20 0.35 0.50 V RF = 1.9 V. DEF output voltage (high) DEF-H 2.5 2.9 V DEF output voltage (low) DEF-L 0 0.5 V APC reference voltage LDS The LDS voltage such that LDD = 1.5 V 120 170 220 mV APC off voltage LDDof LDD 2.7 2.9 V Pin Functions Pin No. Pin Function 1 FIN2 Pickup photodiode (focus, RF) connection 2 FIN1 Pickup photodiode (focus, RF) connection 3 E Pickup photodiode (tracking) connection 4 F Pickup photodiode (tracking) connection 5 TB TE signal DC component input. Pickup photodiode (tracking) connection 6TE– TE signal gain setting resistor connection. A resistor is connected between this pin and TE. 7 TE TE signal output 8 TESI TES comparator input. Takes the bandpass filtered TE signal as its input. 9 SCI Shock detection input 10 TH Tracking gain time constant setting 11 TA TA amplifier output 12 TD– In conjunction with the TD and VR pins, used to form the tracking phase compensation circuit constant 13 TD Tracking phase compensation setting 14 JP Track jump signal amplitude setting 15 TO Tracking control signal output 16 (NC) No connection 17 FD Focusing control signal output 18 FD– In conjunction with the FD and FA pins, used to form the focusing phase compensation circuit constant 19 FA In conjunction with the FD- and FA- pins, used to form the focusing phase compensation circuit constant 20 FA– In conjunction with the FA and FE pins, used to form the focusing phase compensation circuit constant 21 FE FE signal output 22 FE– FE signal gain setting resistor connection. A resistor is connected between this pin and FE. 23 SP CLV pin input signal inverted output 24 SPG Gain setting resistor connection (12 cm spindle mode) Continued on next page. |
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