CXA1910

Manufacturer Part NumberCXA1910
DescriptionDolby B Type Noise Reduction System with Playback Equalizer
ManufacturerSONY [Sony Corporation]
CXA1910 datasheet
 


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Dolby B Type Noise Reduction System with Playback Equalizer
For the availability of this product, please contact the sales office.
Description
The CXA1910Q is an IC designed for use in car
stereos. Functions include Dolby B type noise
reduction, playback equalizer amplifier and Music
sensor into a single chip.
Features
• Few external parts
• Forward/Reverse head switching
• Small package (40-pin QFP)
• Dolby B type noise reduction and playback
equalizer into a single chip
• Same pin configuration as Dolby B/C type noise
reduction system (CXA1911)
• Music sense level can be set by external
resistors/capacitors (2 modes).
• High-band cut filter frequency can be adjusted by
the external capacitance.
Applications
• Car stereos
• Stereo cassette deck players (playback only)
Structure
Bipolar silicon monolithic IC
These ICs are available only to the licensees of Dolby Laboratories Licensing Corporation from whom licensing and applications
information may be obtained.
"Dolby" and the double D symbols are trade marks of Dolby Laboratories Licensing Corporation.
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license
by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples
illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these
circuits.
CXA1910Q
40 pin QFP (Plastic)
Absolute Maximum Ratings (Ta=25°C)
• Supply voltage
• Operating temperature Topr
• Storage temperature
• Allowable power dissipation
Recommended Operating Condition
Supply voltage
—1—
V
12
V
CC
–40 to +85
°C
Tstg
–65 to +150
°C
P
430
mW
D
V
6.5 to 11
V
CC
E93Z04-TE

CXA1910 Summary of contents

  • Page 1

    ... Dolby B Type Noise Reduction System with Playback Equalizer For the availability of this product, please contact the sales office. Description The CXA1910Q designed for use in car stereos. Functions include Dolby B type noise reduction, playback equalizer amplifier and Music sensor into a single chip. ...

  • Page 2

    ... PBGND E IREF F/R PBFIN2 300k PBRIN2 PBFB2 PBTC2 OFF 10dB LPF OFF —2— TAPESW DRSW IN NRMODE MSSW MSMODE MS MODE G1 (FF) G2 (NOR) G1/G2 MSTC DET MSOUT CXA1910Q ...

  • Page 3

    ... Vcc 147 1.25V 36 10µ GND V =5V Vcc DD 147 11 20k GND —3— CXA1910Q (Ta=25°C, V =8.0V, no signal) CC Description PBEQ output PBEQ feedback PBEQ input Power supply Ground PBEQ capacitance Vcc GND Reference current setting resistor pin MS output ...

  • Page 4

    ... VGS 28 GND 8k 147 1.25V 6 50µ GND Vcc 200 147 7 200 24 GND —4— CXA1910Q Description Connection of MS detection Vcc time constant 50µ GND MS feedback TAPE input Vcc Connection of reference current setting resistor for Dolby block Line output ...

  • Page 5

    ... Vcc 30k 50µ 45k 25 147 to VGS 30k GND V CC 100 k 5 147 64p GND —5— CXA1910Q Description Time Constant pin for the level detector Refer to Page 6. Refer to Page output CC No connection. Capacitance connection for adjusting the MS LPF time constant. ...

  • Page 6

    ... TAPESW - Switching of HIGH/NORMAL tape High: NORMAL tape; Low: HIGH tape NRMODE - Switching of noise reduction modes High: noise reduction OFF; Low: Dolby B MSSW - Switching of MS ON/OFF High: MS ON; Low: MS OFF 147 300k 10p —6— CXA1910Q Vcc V REG 500 500 600 GND ...

  • Page 7

    ... No signal, 3.4V applied to VCT and 1.8V to PBFB CRG V No signal, VCT level when boost charge ON CRG1 V No signal, VCT level when boost charge OFF CRG2 V MSMODE, NRMODE, MSSW TAPESW, NRSW, DRSW IH —7— CXA1910Q Min. Typ. Max. Unit 14.5 17.9 21.5 mA –32.0 –30.0 –28.0 dBm 1.4 2.9 4.4 5.5 6 ...

  • Page 8

    ... C13 2.7k 270 33m R13 R14 C7 1.2k R2 1.2k R1 1MEG + + R25 0.1µ 100k C25 R45 0.1µ C23 2.7k 2.2µ R21 C19 10k R20 0.1µ S44 1µ S8 C12 10µ 10µ C9 10n 33µ 270 2.7k R11 R12 C1 —8— CXA1910Q S15 S14 C16 138.5k 5.1k R18 R16 C11 ...

  • Page 9

    ... CXA1910Q ...

  • Page 10

    ... CXA1910Q ...

  • Page 11

    ... Operation mode control (INSW, AUXSW, TAPESW, DRSW, NRSW, MSSW, MODESW) The CXA1910Q has built in electronic switch circuits and the operations are controlled by the direct current applied to each SW pin. The operation mode state for each switch is shown in the table below. SW Function for Low input ...

  • Page 12

    ... Dolby level (–6dBm) (–30dBm) LINEOUT PBOUT TAPEIN Op2 OFF Fig – – 30dBm 30dBm Fig. 2 —12— CXA1910Q 4dB NR 20dB 20dB – 6dBm Dolby level ...

  • Page 13

    ... R1 adjustment method with the same C1 value used for this method.] 3) Low-band cut-off frequency The low-band cut-off frequency (fc) can be determined by the external resistor R1 and external capacitor C1. PBTC PBOUT Ri 300k E IREF 1 R4 (dB) External resistor R1 and external capacitor C1 —13— Fig IREF resistor CXA1910Q ...

  • Page 14

    ... G1 and G2 have the same cut-off frequency 25kHz LPF 100k 64pF 100k G1 G2 MSLPF Fig. 5 External resistors R1 and R2 [dB 20log External resistors R1 and R2 and external capacitors C1 and External capacitor C3 —14— MSTC MSOUT DET R2 + 100k [dB] R2 CXA1910Q ...

  • Page 15

    ... NR OFF, MS OFF 60 Output level 25dBm constant 100 13.0 Decode b oost frequency resp onse V =8. 0dB=Dolby Level 100 1k Frequency [Hz] —15— CXA1910Q Ta=25°C 120µs 70µs 1k 10k Frequency [Hz] OUT 300k 0.01µ 33µ 270 Ta=25°C –40dB –30dB –20dB –10dB 0dB 10k ...

  • Page 16

    ... NR B f=1kHz –8 –4 0 –4 Rip p le rejection ratio (PB O UT) =8.0V 500 1k 5k Frequency [Hz] Rip p le rejection ratio (LINEO UT) =8.0V NR OFF NR B 500 1k 5k Frequency [Hz] —16— CXA1910Q Ta=25° f=100kHz NR B f=10kHz Output level [dB] Ta=25°C 10k Ta=25°C 10k ...

  • Page 17

    ... Frequency [Hz 25°C Vcc = 8.0 V Input : TAPEIN 1 MSLPF Pin : 120 pF 10k MS b lock gain vs. B lank detection level –30 –40 –50 –60 – HPF gain [dB] —17— CXA1910Q 2ch) Ta=25°C 5k 10k Ta=25°C V =8.0V CC Input : TAPEIN1 f=1kHz ...

  • Page 18

    ... SONY CODE EIAJ CODE JEDEC CODE 40PIN QFP (PLASTIC) 9.0 ± 0.4 + 0.4 7.0 – 0 0.15 0.3 – 0.1 M ± 0.12 + 0.15 PACKAGE STRUCTURE DETAIL A PACKAGE MATERIAL QFP-40P-L01 LEAD TREATMENT LEAD MATERIAL QFP040-P-0707 PACKAGE WEIGHT —18— CXA1910Q + 0.35 1.5 – 0.15 + 0.1 0.127 – 0.05 0.1 A EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.2g ...