--1--
E96X02B7Y
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.
Absolute Maximum Ratings (Ta=25 C)
Supply voltage
V
CC
13
V
Operating temperature
Topr
40 to +85
C
Storage temperature
Tstg
65 to +150
C
Allowable power dissipation
P
D
350
mW
(Ta = 85 C)
Recommended Operating Condition
Supply voltage
V
CC
6 to 12
V
Description
The CXA2506Q is a 2-channel electronic volume
IC. A 34-bit serial data input controls the level and
characteristics of the output signal. It may be used
in car stereos and general audio systems.
Features
Loudness (Full boost at 32 dB or less of VRC)
Volume control
(from 0 dB to 87 dB,
dB:
Fine (1 dB-step)
Coarse (8 dB-step)
Balance
Tone control
(3-band, 2 dB-step from 15 dB to +15 dB)
Fader
(2 dB-step to 20 dB, 25 dB, 35 dB, 45 dB, 60
dB,
dB)
Input and gain selector (4 channels)
Serial data control (DATA, CLK, CE)
Single 8 V power supply
Zero-cross detection circuit
Timer
Power-off mute
Structure
Bipolar IC
Electronic Volume
48 pin QFP (Plastic)
CXA2506Q
For the availability of this product, please contact the sales office.
--2--
CXA2506Q
Block Diagram and Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
LOUD
V OLUME
8dB STEP
V OLUME
1dB STEP
TONE
FA DER
V CTBUFF
V CTBUFF
V CTBUFF
SHIFT REGISTER
LA TCH
V CTBUFF
1dB STEP
V OLUME
TONE
FA DER
ZCDET
IN
P
U
T
S
W
IT
CH
IN
P
U
T
S
W
IT
CH
LA TCH
CONTROL
LOUD
V CTBUFF
V CTBUFF
8dB STEP
V OLUME
GAIN12
GAIN11
IN14
IN13
IN12
IN11
IN21
IN22
IN23
IN24
GAIN21
GAIN22
GA
IN
1
3
4
LD
LC
1
L
DHC1
IN
A
O
1
VR
I
N
1
T
CHC1
TC
M
C
1
1
TC
M
C
1
2
T
C
LC
11
T
C
LC
12
TC
O
1
FD
I
N
1
GA
IN
2
3
4
DL
C2
L
DHC2
IN
A
O
2
VR
I
N
2
T
CHC2
TC
M
C
2
1
TC
M
C
2
2
T
C
LC
21
T
C
LC
22
TC
O
2
FD
I
N
2
FNTO1
REO1
CE
CLK
DGND
GND
V
CC
VCT
DATA
TIMER
REO2
FNTO2
--3--
CXA2506Q
Pin Description and Equivalent Circuit
Pin
Pin Name
I/O Resistance
Equivalent Circuit
Description
No.
Pin voltage
2
35
3
34
4
33
5
32
6
31
LDLC2
LDLC1
LDHC2
LDHC1
INAO2
INAO1
VRIN2
VRIN1
TCHC2
TCHC1
6.18 k
VCT
8.92 k
VCT
--
VCT
10 k
VCT
5 k
VCT
Sets loudness low cut-off
frequency.
Set loudness high cut-off
frequency
Input selector output
Volume input
Set tone Treble frequency
GND
V
CC
2
35
GND
V
CC
3
34
GND
V
CC
4
33
GND
V
CC
5
32
GND
V
CC
6
31
--4--
CXA2506Q
Pin
Pin Name
I/O Resistance
Equivalent Circuit
Description
No.
Pin voltage
7
30
8
29
9
28
10
27
11
26
TCMC21
TCMC11
TCMC22
TCMC12
TCLC21
TCLC11
TCLC22
TCLC12
TCO2
TCO1
4 k
VCT
4 k
VCT
8 k
VCT
8 k
VCT
--
VCT
Sets tone Mid frequency
Sets tone Mid frequency
Sets tone Bass frequency
Sets tone Bass frequency
Tone control output
GND
V
CC
7
30
GND
V
CC
8
29
GND
V
CC
9
28
GND
V
CC
10
27
GND
V
CC
11
26
--5--
CXA2506Q
Pin
Pin Name
I/O Resistance
Equivalent Circuit
Description
No.
Pin voltage
12
25
13
24
14
23
15
16
FDIN2
FDIN1
REO2
REO1
FNT02
FNT01
TIMER
DATA
24 k
VCT
--
VCT
--
VCT
~
--
~
--
Fader input
Rear output
Front output
Sets timer constant
Serial data input
GND
V
CC
12
25
GND
V
CC
13
24
GND
V
CC
14
23
GND
V
CC
15
GND
V
CC
16
--6--
CXA2506Q
Pin
Pin Name
I/O Resistance
Equivalent Circuit
Description
No.
Pin voltage
17
18
19
20
21
22
1
36
37
38
47
49
39
40
41
42
43
44
45
46
VCT
V
CC
GND
DGND
CLK
CE
GAIN234
GAIN134
GAIN12
GAIN11
GAIN21
GAIN22
IN14
IN13
IN12
IN11
IN21
IN22
IN23
IN24
--
VCT
--
V
CC
--
Gnd
--
--
~
--
~
--
~
VCT
50 k
VCT
1/2 V
CC
Power supply input
Ground
Digital ground
Serial clock input
Latch enable input
External gain setting for input
amplifier
Signal input
GND
V
CC
21
GND
V
CC
22
GND
V
CC
1
36
37
38
47
48
GND
V
CC
39
40
41
42
43
44
45
46
--7--
CXA2506Q
Data Format
D1
NOP
D2
NOP
D3
ISW
D4
D5
LOUD
D6
D7
VRC1
D8
D9
D10
D11
VRF1
D12
D13
D14
VRC2
D15
D16
D17
D18
VRF2
D19
D20
D21
TONE BASS
D22
D23
D24
D25
TONE MID
D26
D27
D28
D29
TONE TREBLE
D30
D31
D32
D33
FADER
D34
D35
D36
FADER SELECT
First Bit
Last Bit
--8--
CXA2506Q
ISW
LOUD
VRC1/VRC2
OUTPUT (dB)
D6/D13
D7/D14
D8/D15
D9/D16
0
8
16
24
32
40
48
56
64
72
80
1
1
0
0
1
1
0
0
1
1
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
1
1
1
1
1
1
1
1
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
0
MODE
D5
ON
1
OFF
0
MODE
D3
D4
IN14/IN24, GAIN134/GAIN234
IN13/IN23, GAIN134/GAIN234
IN12/IN22, GAIN12/GAIN22
IN11/IN21, GAIN11/GAIN21
1
1
0
0
1
0
1
0
--9--
CXA2506Q
VRF1/VRF2
BASS/MID/TREBLE
BOOST/CUT
OUTPUT (dB)
D10/D17
D11/D18
D12/D19
0
1
2
3
4
5
6
7
1
0
1
0
1
0
1
0
1
1
0
0
1
1
0
0
1
1
1
1
0
0
0
0
OUTPUT (dB)
D20/D24/D28
D21/D25/D29
D22/D26/D30
15
12
10
8
6
4
2
0
1
0
1
0
1
0
1
0
1
1
0
0
1
1
0
0
1
1
1
1
0
0
0
0
MODE
D23/D27/D31
BOOST
1
CUT
0
--10--
CXA2506Q
FADER
FADER SELECT
RESET
Reset is performed automatically when power is first supplied to the IC; there is no reset pin.
The following table shows the respective statuses of various settings after a reset has been performed.
However, from the time when power is first supplied until the first data transfer, keep CE high by pulling it up to
V
CC
, etc.
OUTPUT (dB)
D32
D33
D34
D35
60
45
35
25
20
18
16
14
12
10
8
6
4
2
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
MODE
D36
FRONT
1
REAR
0
MODE
SET VALUE
INPUT
1
VRC1
dB
VRF1
7 dB
VRC2
dB
VRF2
7 dB
LOUD
OFF
TONE BASS
0 dB
TONE MID
0 dB
TONE TREBLE
0 dB
FADER
0 dB, REAR
--11--
CXA2506Q
Timing Chart
Waiting period
Min.
Typ.
Max.
3 s
5 s
9 s
30 s
50 s
90 s
300 s
500 s
900 s
3 ms
5 ms
9 ms
30 ms
50 ms
90 ms
300 ms
500 ms
900 ms
TIMER pin
capacitance C
C = 100 pF
C = 0.001 F
C = 0.01 F
C = 0.1 F
C = 1 F
C = 10 F
Timer Waiting Period Setting Chart (V
CC
= 6 to 12 V, operating temperature=40 C to 85 C)
t
1
tck
tsu
th
t
2
t
L
tce
tce
4.0s
D1
D2
D34
D35
D36
Invalid
CE
DATA
CLK
CE
t
1
0.5s
t
2
0.5s
tck
1.0s
tsu
0.5s
th
0.5s
t
L
t
T
+0.5s
(t
T
is the maximum value for the timer operation time)
--12--
CXA2506Q
Electrical Characteristics
V
CC
=8 V, Ta=25 C, Input=0 dB unless otherwise specified
Item
Symbol
Conditions
Min.
Typ.
Max
Unit
--
21
28
mA
--
0.003
0.01
%
--
8
10
Vrms
8
--
--
dBm
72
90
--
85
90
--
7
8
9
5
6
7
13
15
17
dB
13
15
17
13
15
17
13
15
17
13
15
17
13
15
17
3
--
6
0
--
1.5
1
--
V
CC
1
V
No signal
1 kHz, 5 dBm output
Short-circuit at input, A weight
1 kHz
1 kHz
100 Hz, VRC=16 dB
10 kHz, VRC=16 dB
DATA, CLK, CE
DATA, CLK, CE
IN11 to 14
IN21 to 24
VRIN1, 2
FDIN1, 2
I
CC
THD
Vn
Vom
CS
ATTm
Glb
Glh
Gbb
Gbc
Gmb
Gmc
Gtb
Gtc
Vsh
Vsl
Vin
Current consumption
Total Harmonic distortion
Output noise voltage
Max output voltage
Separation
Max. attenuation factor
Loudness LOW
Loudness HIGH
Bass max. boost gain
Bass max. cut gain
Mid max. boost gain
Mid max. cut gain
Treble max. boost gain
Treble max. cut gain
Input voltage HIGH
Input voltage LOW
Input voltage range
--13--
CXA2506Q
Electrical Characteristic Test Circuit
GAIN
234
LDLC
2
LDHC2
INA
O2
VRIN
2
TCHC2
TCM
C2
1
TCM
C2
2
TC
LC21
TC
LC22
TCO
2
FDIN
2
GAIN
134
LDLC
1
LDHC1
INA
O1
VRIN
1
TCHC1
TCM
C1
1
TCM
C1
2
TC
LC11
TC
LC12
TCO
1
FDIN
1
FN
TO
1
FN
TO
2
GA
IN
1
2
GA
IN
2
2
R5
10k
C1
0.15
C3
820p
C5
10
C7
0.0027
C9
0.033
C11
0.022
C1
3
10
C15
0.39
C1
7
10
A
B
AC
V6
R7
10k
R8
10k
A
B
R1
4
10k
C2
0
0.
01
R9
1k
V1
VEE
3-6V
S4
C19
100
R1
0
1k
R1
1
1k
R1
2
10k
R1
3
10k
V2
V3
R15
10k
V5
AC
1k
R19
C2
1
220p
R15
10k
R2
0
1k
R1
8
1k
O
PAM
P
R17
10k
5V
0V
CE
5V
0V
CL
K
5V
0V
DA
T
A
S1
C1
8
B
V4
AC
A
S5_A
10
C15
0.39
C1
4
10
C12
0.022
C10
0.033
C8
0.0027
S2
C6
10
820p
C4
0.15
C2
10k
R5
10k
R4
10k
R2
AC
V14
S1
4
B
A
AC
V13
S1
3
B
A
S1
2
AC
V12
S1
1
AC
V11
S2
1
AC
V21
S2
2
AC
V22
S2
3
AC
V23
S2
4
AC
V24
R3
R1
10k
10k
S5_B
-
60dB
m
B
A
B
A
B
A
B
A
B
A
B
A
B
A
S3
1
2
3
4
5
6
7
8
9
10
11
12
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
13
14
15
16
17
18
20
21
22
23
24
19
RE
O
1
CE
CL
K
DG
ND
GN
D
V
CC
VC
T
DA
T
A
TI
M
E
R
RE
O
2
GA
IN
1
1
IN
1
4
IN
1
3
IN
1
2
IN
1
1
IN
2
1
IN
2
2
IN
2
3
IN
2
4
GA
IN
2
1
V
CC
3-6V
--14--
CXA2506Q
Application Circuit
FN
TO
1
FN
TO
2
GA
IN
1
2
GA
IN
2
2
R5
10k
C1
0.15
C3
820p
C5
10
C7
0.0027
C9
0.033
C11
0.022
C1
3
10
C15
0.39
C1
7
10
R7
10k
R8
10k
C2
0
0.
01
R9
1k
C19
33
R1
0
1k
R1
1
1k
R1
2
10k
R1
3
10k
T
O
PO
W
E
R
SU
PPL
Y
C1
8
10
C15
0.39
C1
4
10
C12
0.022
C10
0.033
C8
0.0027
C6
10
820p
C4
0.15
C2
10k
R5
10k
R4
10k
R2
R3
R1
10k
10k
TO
C
P
U
IN
P
U
T
S
IGN
A
L
S
O
URCE
S
C21
10
OU
T
P
U
T
S
IGN
A
L
GAIN
234
LDLC
2
LDHC2
INA
O2
VRIN
2
TCHC2
TCM
C2
1
TCM
C2
2
TC
LC21
TC
LC22
TCO
2
FDIN
2
GAIN
134
LDLC
1
LDHC1
INA
O1
VRIN
1
TCHC1
TCM
C1
1
TCM
C1
2
TC
LC11
TC
LC12
TCO
1
FDIN
1
1
2
3
4
5
6
7
8
9
10
11
12
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
13
14
15
16
17
18
20
21
22
23
24
19
RE
O
1
CE
CL
K
DG
ND
GN
D
V
CC
VC
T
DA
T
A
TI
M
E
R
RE
O
2
GA
IN
1
1
IN
1
4
IN
1
3
IN
1
2
IN
1
1
IN
2
1
IN
2
2
IN
2
3
IN
2
4
GA
IN
2
1
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
--15--
CXA2506Q
Tone Control Frequency Characteristics
Voltage (dB)
Frequency (Hz)
20
10
0
10
20
1
10
100
1k
10k
100k
15dB
15dB
BASS
MID
TREBLE
Loudness Frequency Characteristics
Voltage (dB)
Frequency (Hz)
10
0
10
40
1
10
100
1k
10k
100k
20
30
VRC=0dB
VRC=8dB
VRC=16dB
VRC=24dB
VRC=32dB
Example if Representative Characteristics
--16--
CXA2506Q
Description of Operation
(1) Gain of input amplifier
The input selector stage may be configured as a buffer or a non-inverting amplifier.
(2) Loud
The loudness function achieves the necessary frequency characteristics by using a filter as shown below.
The resistors are built in so that f
L
and f
H
can be set by selecting C1 and C2.
36
37
38
GAIN134
GAIN12
GAIN11
R1
R2
Gain=1+R
2
/R
1
33 INA01
CXA2506Q
VCT
39
40
41
42
IN14
IN13
IN12
IN11
Input amp of channel 1
2
3
5
32
34
35
LDHC1
LDHC2
C2
R2=21.93k
30k
VRIN1
VRIN2
CXA2506Q
3.79k
VCT
R1=1.84k
VCT
C1
LDLC1
LDLC2
f
L
f
H
f
L
=1/(2
C
1
R
1
)
f
H
=1/(2
C
2
R
2
)
--17--
CXA2506Q
(3) Tone control
BASS: LPF
MID: BPF
TREBLE: HPF
18
27
R1=8k
CXA2506Q
C1
VCT
R2=8k
8k
8k
VCT
VCT
TCLC12
TCLC22
f
L
f
L
=1/(2
C
1
R
1
//R
2
)
7
8
29
38
4k
4k
16k
HPF
16k
VCT
TCMC12
TCMC22
C2
VCT
C3
VCT
TCMC11
TCMC21
CXA2506Q
R4=8k
LPF
R3=4k
f
H
f
L
f
M
f
L
=1/(2
C
2
R
3
)
f
H
=1/(2
C
3
R
4
)
6
31
10k
10k
10k
10k
VCT
R5=5k
CXA2506Q
VCT
C4
TCHC11
TCHC21
f
H
f
H
=1/(2
C
4
R
5
)
--18--
CXA2506Q
(4) Zero-cross detector and Timer
A built-in zero-cross detection circuit is used to detect the zero-cross points of the input signal. When data
arrived at the IC, they are executed at the next zero-cross point or when there is no input signal. This is to
minimize 'click' noise during the transition of levels.
The timer circuit is added to ensure that the data is executed even when a zero-cross point is not detected
after a pre-determined period of time from the falling edge of the CE pulse.
(5) VCT pin
The internal circuit of VCT pin has the following structure.
Insert a buffer when using it as a reference voltage for an external circuit.
(6) Power-off Mute
This function mutes the output pins FNTO1, FNTO2, REO1 and REO2, when the V
CC
goes below 5V, by
turning off the bias of the output stage of the fader circuit. By so doing, the 'pop' noise caused by the drop
in these pins potential from V
CC
/2 during power-off can be avoided.
15
V
CC
10A
0.5V
CE
C
TIMER
CXA2506Q
Time constant=(0.5/10)
C [sec]
17
V
CC
100k
100k
GND
VCT
CXA2506Q
SONY CODE
EIAJ CODE
JEDEC CODE
M
PACKAGE STRUCTURE
PACKAGE MATERIAL
LEAD TREATMENT
LEAD MATERIAL
PACKAGE WEIGHT
EPOXY RESIN
SOLDER / PALLADIUM
PLATING
COPPER / 42 ALLOY
48PIN QFP (PLASTIC)
15.3 0.4
12.0 0.1
+ 0.4
0.8
0.3 0.1
+ 0.15
0.12
13
24
25
36
37
48
1
12
2.2 0.15
+ 0.35
0.9
0.2
0.1 0.1
+ 0.2
13.5
0.15
0.15 0.05
+ 0.1
QFP-48P-L04
QFP048-P-1212-B
0.7g
Package Outline Unit : mm
CXA2506Q
--19--
NOTE : PALLADIUM PLATING
This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).
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