cxa2561q Sony Electronics, cxa2561q Datasheet
cxa2561q
Available stocks
Related parts for cxa2561q
cxa2561q Summary of contents
Page 1
... Dolby B-C Type Noise Reduction System with Playback Equalizer Amplifier Description The CXA2561Q designed for use in car stereo cassette decks. Functions include Dolby B-C type noise reduction (NR) system, playback equalizer amplifier and music sensor into a single chip. Features • Few external parts • ...
Page 2
... NR OFF/ 100k B MODE 1 BIAS MUTE TAPE EQ NR MODE FWD/RVS V CC LPF DET OFF/ B/C 100k – 2 – CXA2561Q 21 MSMODE 20 DRSW 19 TAPESW 18 MUTESW 17 16 NRSW NRMODE 15 MS ON/ OFF 14 MSOUT 13 MSTC 12 G1FB 11 G2FB 9 10 ...
Page 3
... O — 3 200 28 147 I 100k 4 100k 27 30p VGS — — – 3 – CXA2561Q = 8.0V 5.0V Description Vcc Playback equalizer amplifier capacitance. GND Vcc Playback equalizer amplifier output. GND Vcc Output reference. (Vcc/2 output) GND Vcc TAPE input. GND Power supply. ...
Page 4
... CXA2561Q = 8.0V 5.0V Description Vcc Line output. GND Vcc Time constant for the HLS. GND Vcc Time constant for the LLS. GND Vcc Cut-off frequency adjustment of the music sensor LPF ...
Page 5
... O — 147 I 100k 17 18 100k 21 – 5 – CXA2561Q = 8.0V 5.0V Description Vcc Music signal interval 500 detection level setting. 500 GND Vcc Time constant for detecting the music signal interval. 10k GND Vcc Music sensor output ...
Page 6
... I — 32 150 50p — I – 6 – CXA2561Q = 8.0V 5.0V Description Vcc Dolby NR control. Low (open): NR OFF High Head select control. Low (open): FORWARD High: REVERSE GND Vcc Music sensor mode control. Low (open): G1 ...
Page 7
... Equivalent circuit resis- tance — — 30k 147 O — 35 45k 30k 200 O — 36 200 — — – 7 – CXA2561Q = 8.0V 5.0V Description Playback equializer amplifier ground. (Connect to ground.) Vcc Center. VGS 1 (Vcc/2 output) GND Vcc Playback equializer amplifier reference. (Vcc/2 output) GND ...
Page 8
... TAPEIN 1kHz –20dBm 2.7k TAPEIN 1kHz –20dBm 2.7k No signal 5.1k , CCIR/ARM filter used No signal 5.1k , CCIR/ARM filter used TAPEIN 1kHz, NR OFF 2.7k , THD = 1% TAPEIN 1kHz –24dBm, NR OFF, 1kHz BPF used – 8 – CXA2561Q (Ta = 25° 8.0V 5.0V Min. Typ. Max. Unit 7.8 8.0 11 ...
Page 9
... No signal, MS OFF, G1 mode TAPEIN 5kHz –30dBm, MS ON, G1 mode, 1mA applied to MSOUT pin Input voltage of NRMODE, NRSW, MUTESW, TAPESW, DRSW, MSMODE, MSSW Input voltage of NRMODE, NRSW, MUTESW, TAPESW, DRSW, MSMODE, MSSW – 9 – CXA2561Q Min. Typ. Max. Unit –110.0 — –70.0 dB 0.0 –0.1 ...
Page 10
... C10 C16 22µ 2.2µ R7 C11 2.7k C20 C15 C18 1µ 270p 0.1µ 0.068 µ C8 2.2µ – 10 – CXA2561Q R27 10k S21 R26 100 S20 R25 10k S19 DC Voltmeter R24 100 S18 R23 10k S17 0dB or 30dB Amp MSSW R28 OFF: 0dB H/L 50k ...
Page 11
... C8 C15 C13 Vcc C11 0.068 0.1µ 0.1µ 0.47µ C10 R7 22µ GND GND GND 10k LINEOUT1 GND – 11 – CXA2561Q C16 0.068µ MSMODE 20 DRSW 19 From MS MODE Microcomputer TAPESW 18 MUTESW 17 NRSW NR MODE 16 NRMODE 15 MS ON/ To Microcomputer OFF ...
Page 12
... Description of Operation 1. Signal route The CXA2561Q signal circuit is shown in Fig FWD AMP1 RVS PBFB 2. Gain adjustment method Adjust the playback equalizer amplifier gain so that –6dBm (Dolby level) is output on LINEOUT (Pins 7 and 24) by playing back the reference tape for Dolby level adjustment. ...
Page 13
... RVS PBREF Fig. 3. Playback equalizer amplifier block diagram The CXA2561Q configures the playback equalizer amplifier by connecting the external capacitor C1 and resister R1 shown in Fig. 3. Two systems (FORWARD and REVERSE) of playback head input are provided for each channel. The FORWARD input pin is selected when DRSW (Pin 19) is Low; REVERSE is selected when DRSW is High. The playback equalizer amplifier frequency response can be set in two levels (70µ ...
Page 14
... The response time for no signal detection depends on the external resistor R9 and the external capacitor C5. Vcc 5 Full- R4 wave Smoother 100k rectifier AMP2 R5A C1 29k 64p Q1 R5B 10k G1FB G2FB MSLPF Fig. 5. Music sensor block diagram – 14 – CXA2561Q DVcc R10 MSOUT AMP3 0.775V for R6 signal detection 1k 0.616V for no signal detection MSTC C5 R9 ...
Page 15
... Operating mode control method The CXA2561Q has a Dolby NR mode select switch (NRMODE), Dolby NR switch (NRSW), mute switch (MUTE SW), playback equalizer amplifier select switch (TAPESW), head input select switch (DRSW), music sensor mode select switch (MSMODE) and music sensor switch (MSSW). The operating modes for each switch are shown in the following table. ...
Page 16
... C type decode boost characteristics –40dB 0dB = Dolby Level 16 12 –30dB 8 –20dB 4 –10dB 25°C –4 0dB 10k – 16 – CXA2561Q PBFIN 680 300k 7k/12k PBTC PBFB PBOUT 2.2µ 270 0.01µ = 8.0V –60dB –50dB –40dB –30dB –20dB –10dB 0dB 100 ...
Page 17
... C type total harmonic distortion V CC Input : TAPEIN1 Output : LINEOUT1 R L 0dB = Dolby Level 0 10 – 1kHz – –10 – 17 – CXA2561Q = 8. 25° 10kHz 100Hz 1kHz –6 – Output level [dB] ...
Page 18
... Ta = 25°C PBFIN 47µ 680 PBFB PBREF PBREF 270 10k Fig. 7 Measurement circuit for crosstalk between channels Ta = 25° 10k – 18 – CXA2561Q Ta = 25°C NR OFF 100 1k 10k Frequency [Hz] 24dB 300k 7k PBTC PBOUT TAPEIN LINEOUT 2.2µ 0.1µ ...
Page 19
... MSOUT 14 100k 1MEG MSTC 13 0.1 G2FB 11 3.9k 0.01 1.0 0.01 Signal detection response time (G2) Input TAPEIN1 f = 5kHz 1000 TAPEIN1 MSOUT Response time MSOUT 14 100k MSTC 13 11 G2FB 3.9k 100 10 1.0 0.01 – 19 – CXA2561Q Ta = 25°C C 0.47µF 0.1 1.0 MSTC capacitance [µ 25°C –30dBm –40dBm –50dBm 0.47µF 0.1 1.0 MSTC time constant [s] ...
Page 20
... This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). 40PIN QFP (PLASTIC) 9.0 ± 0.4 + 0.4 7.0 – 0 0.15 0.3 – 0.1 M ± 0.12 PACKAGE STRUCTURE A PACKAGE MATERIAL LEAD TREATMENT LEAD MATERIAL QFP040-P-0707 PACKAGE WEIGHT – 20 – CXA2561Q + 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 ...