Document
CXA2509AQ
Playback Equalizer Amplifier with Music Sensor
Description The CXA2509AQ is an IC designed for use in car stereo cassette decks. Functions include playback equalizer amplifier and music sensor into a single chip. Features • Few external parts • Small package (40-pin QFP) • Same pin configuration as for the Dolby B-C type NR system (CXA2511AQ) and Dolby B type NR system (CXA2510AQ) • Playback equalizer amplifier and music sensor into a single chip • FORWARD/REVERSE head select switch • Two-system (TAPE/AUX) input select switch • Music signal interval detection level can be set by the external resistors/capacitors (2 modes). • High-frequency cut-off of the music sensor circuit can be adjusted by the external capacitance. Applications • Car stereo cassette decks • Playback-only cassette decks 40 pin QFP (Plastic)
Structure Bipolar silicon monolithic IC Absolute Maximum Ratings • Supply voltage VCC • Operating temperature Topr • Storage temperature Tstg • Power dissipation PD Operating Condition Supply voltage
12 –40 to +85 –65 to +150 430
V °C °C mW
VCC
7.8 to 11
V
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.
–1–
E96826-PS
CXA2509AQ
Block Diagram and Pin Configuration
PBEQ2
AUXIN2
LINEOUT2
PBOUT2
TAPEIN2
DIREF
30 PBFB2 31 PBRIN2 32
29
28
27
26
25
24
23 24dB
NC
22
21 20 MSMODE 19 DRSW
120µ/70µ
×1 PBREF2 33 F2 PBFIN2 34 VCT 35 VCT PBGND 36 PBFIN1 37 F1 PBREF1 38 PBRIN1 39 PBFB1 40 1 2 120µ/70µ 3 4 ×1
T2 NR BIAS TAPE/AUX TAPE EQ
MS MODE 18 TAPESW 17 INSW 16 NC
FWD/RVS VCC LPF DET F3 T1 12 MSTC 11 G1FB 9 10 15 NC MS ON/ OFF 14 MSOUT 13 DGND
24dB 5 6 7 8
TAPEIN1
PBOUT1
LINEOUT1
AUXIN1
PBEQ1
VCC
NC
–2–
MSLPF
G2FB
NC
MSSW
GND
NC
CXA2509AQ
Pin Description Pin No. Symbol Typical pin voltage DC AC I/O I/O resistance
(Ta = 25°C, VCC = 8.0V, DVCC = 5.0V) Equivalent circuit Description
Vcc
40k
1 30
PBEQ1 PBEQ2
1k
4.0V
—
O
—
5k
1 30 1k
Resistance for selecting the playback equalizer amplifier time constant
GND
Vcc
2 29
PBOUT1 PBOUT2
200
4.0V
–25dBm O
—
2 29 200
Playback equalizer amplifier output
GND
3
VCC
8.0V
—
—
—
Vcc
Power supply
4 27
TAPEIN1 TAPEIN2 4.0V –30dBm I 40kΩ
4 27 5 40k 147 20p
TAPE input
5 26
AUXIN1 AUXIN2
26 VGS GND
External input
Vcc
100k
6
MSLPF
4.0V
—
—
100kΩ
6 147 64p GND
Cut-off frequency adjustment of the music sensor LPF
–3–
CXA2509AQ
Pin No.
Symbol
Typical pin voltage DC AC
I/O
I/O resistance
Equivalent circuit
Description
Vcc
7 24
LINEOUT1 LINEOUT2
4.0V
–6dBm
O
—
147 7 24 200
200
Line output
22.5k
GND
Vcc
10 11
G2FB G1FB
500
4.0V
—
—
—
147 10 11 500
Music signal interval detection level setting
GND
Vcc
12
MSTC
—
—
—
—
147 12
853
10k DGND GND
Time constant for detecting the music signal interval
13
DGND
0.0V
—
—
—
Logic ground (Connect to GND.)
Vcc
14
MSOUT
0.2V when a signal is detected; DVcc when no signal is detected
DVcc
100k
—
O
—
14
Music sensor output
DGND
GND
–4–
CXA2509AQ
Pin No.
Symbol
Typical pin voltage DC AC
I/O
I/O resistance
Equivalent circuit
Description Line amplifier input select control Low (open): TAPEIN High: AUXIN Playback equalizer amplifier control Low (open): 120µs High: 70µs
DGND
17
INSW
Vcc
18
TAPESW
0.0V when open
17
1.1k 100k
—
I
100kΩ
18 19
19
DRSW
GND
Head select control Low (open): FORWARD High: REVERSE
Vcc
20
MSMODE
0.0V when open
—
I
100kΩ
1.1k 20 100k DGND GND
Music sensor mode control Low (open): G1 High : G2
Vcc
21
MSSW
0.0V when open
—
I
100kΩ
1.1k 21 100k DGND GND
Music sensor control Low (open): MS ON High: MS OFF
–5–
CXA2509AQ
Pin No.
Symbol
Typical pin voltage DC AC
I/O
I/O resistance
Equivalent circuit
Description
Vcc
25
DIREF
1.2V
—
—
—
147 25
Resistance for setting the reference current (Connects 20 (18) kΩ between DIREF pin and GND for the standard setting.)
GND
28
GND
0.0V
—
—
—
Ground Playback equalizer amplifier feedback
31 40
PBFB2 PBFB1
4.0V
–70dBm
I
—
Vcc
32 39
PBRIN2 PBRIN1 4.0V –70dBm I —
32 39 34 36 PBREF PBREF GND 50p 50p 31 40
Playback equalizer amplifier input (REVERSE head connected)
34 37
PBFIN2 PBFIN1
Playback equalizer amplifier input (FORWARD head connected)
Vcc
33 38
PBREF2 PBREF1
200
4.0V
—
O
—
33 38 200
Playback equalizer amplifier reference (VCC/2 output)
GND
–6–
CXA2509AQ
Pin No.
Symbol
Typical pin voltage DC AC
I/O
I/O resistance
Equivalent circuit
Vcc 30k 147
Description
35
VCT
4.0V
—
O
—
35 45k
×1
VGS
Center (VCC/2 output)
30k GND
36
PBGND
0.0V
—
—
—
Playback equalizer amplifier ground (Connect to ground.)
8 9 .