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CXA2506Q
Electronic Volume For the availability of this product, please contact the sales office.
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 48 pin QFP (Plastic)
Absolute Maximum Ratings (Ta=25 C) * Supply voltage VCC 13 V * Operating temperature Topr -40 to +85 C * Storage temperature Tstg -65 to +150 C * Allowable power dissipation PD 350 mW (Ta = 85 C) Recommended Operating Condition * Supply voltage VCC 6 to 12
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--
E96X02B7Y
CXA2506Q
Block Diagram and Pin Configuration
GAIN134
TCMC11
TCMC12
LDLC1
LDHC1
TCHC1
TCLC11
TCLC12
INAO1
VRIN1
36 GAIN12 GAIN11 IN14 IN13 IN12 IN11 IN21 IN22 IN23 IN24 GAIN21 GAIN22 37 38 39 40 41 42 43 44 45 46 47 48
35
34
33
32
31
30
29
28
27
TCO1
26
FDIN1
25 24 FNTO1 23 REO1 22 CE 21 CLK 20 DGND 19 GND 18 VCC 17 VCT 16 DATA 15 TIMER 14 REO2 13 FNTO2 12
LOUD
8dB STEP 1dB STEP V OLUME V OLUME
TONE
FA DER
INPUT SWITCH
V CTBUFF V CTBUFF V CTBUFF ZCDET LA TCH SHIFT REGISTER V CTBUFF V CTBUFF V CTBUFF V OLUME 8dB STEP LOUD V OLUME 1dB STEP TONE FA DER LA TCH CONTROL
1
GAIN234
INPUT SWITCH
2
DLC2
3
LDHC2
4
INAO2
5
VRIN2
6
TCHC2
7
TCMC21
8
TCMC22
9
TCLC21
10
11
--2--
TCLC22
FDIN2
TCO2
CXA2506Q
Pin Description and Equivalent Circuit Pin No. Pin Name I/O Resistance Pin voltage Equivalent Circuit
VCC
Description
2 35
LDLC2 LDLC1
6.18 k VCT
2
35
Sets loudness low cut-off frequency.
GND
VCC
3 34
LDHC2 LDHC1
8.92 k VCT
3
34
Set loudness high cut-off frequency
GND
VCC
4 33
INAO2 INAO1
-- VCT
4
33
Input selector output
GND
VCC
5 32
VRIN2 VRIN1
10 k VCT
5
32
Volume input
GND
VCC
6 31
TCHC2 TCHC1
5k VCT
6
31
Set tone Treble frequency
GND
--3--
CXA2506Q
Pin No.
Pin Name
I/O Resistance Pin voltage
Equivalent Circuit
VCC
Description
7 30
TCMC21 TCMC11
4k VCT
7
30
Sets tone Mid frequency
GND
VCC
8 29
TCMC22 TCMC12
4k VCT
8
29
Sets tone Mid frequency
GND
VCC
9 28
TCLC21 TCLC11
8k VCT
9
28
Sets tone Bass frequency
GND
VCC
10 27
TCLC22 TCLC12
8k VCT
10 27
Sets tone Bass frequency
GND
VCC
11 26
TCO2 TCO1
-- VCT
11 26
Tone control output
GND
--4--
CXA2506Q
Pin No.
Pin Name
I/O Resistance Pin voltage
Equivalent Circuit
VCC
Description
12 25
FDIN2 FDIN1
24 k VCT
12 25
Fader input
GND
VCC
13 24
REO2 REO1
-- VCT
13 24
Rear output
GND
VCC
14 23
FNT02 FNT01
-- VCT
14 23
Front output
GND
VCC
15
TIMER
~ --
15
Sets timer constant
GND
VCC
16
DATA
~ --
16
Serial data input
GND
--5--
CXA2506Q
Pin No. 17 18 19 20
Pin Name VCT VCC GND DGND
I/O Resistance Pin voltage -- VCT -- VCC -- Gnd -- --
Equivalent Circuit 1/2 VCC
Description
Power supply input Ground Digital ground
VCC
21
CLK
~ --
21
Serial clock input
GND
VCC
22
CE
~ --
22
Latch enable input
GND
VCC
1 36 37 38 47 49
GAIN234 GAIN134 GAIN12 GAIN11 GAIN21 GAIN22
1
36
~ VCT
37 38 47 48 GND
External gain setting for input amplifier
39 40 41 42 43 44 45 46
IN14 IN13 IN12 IN11 IN21 IN22 IN23 IN24
VCC
39
40 42 44 46 GND
50 k VCT
41 43 45
Signal input
--6--
CXA2506Q
Data Format First Bit D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 D19 D20 D21 D22 D23 D24 D25 D26 D27 D28 D29 D30 D31 D32 D33 D34 D35 D36 NOP NOP ISW LOUD
VRC1
VRF1
VRC2
VRF2
TONE BASS
TONE MID
TONE TREBLE
FADER
Last Bit
FADER SELECT
--7--
CXA2506Q
ISW MODE IN14/IN24, GAIN134/GAIN234 IN13/IN23, GAIN134/GAIN234 IN12/IN22, GAIN12/GAIN22 IN11/IN21, GAIN11/GAIN21 D3 1 1 0 0 D4 1 0 1 0
LOUD MODE ON OFF D5 1 0
VRC1/VRC2 OUTPUT (dB) 0 -8 -16 -24 -32 -40 -48 -56 -64 -72 -80 - - D6/D13 1 1 1 1 1 1 1 1 0 0 0 0 0 D7/D14 1 1 1 1 0 0 0 0 1 1 1 1 0 D8/D15 1 1 0 0 1 1 0 0 1 1 0 0 0 D9/D16 1 0 1 0 1 0 1 0 1 0 1 0 0
--8--
CXA2506Q
VRF1/VRF2 OUTPUT (dB) 0 -1 -2 -3 -4 -5 -6 -7 D10/D17 1 1 1 1 0 0 0 0 D11/D18 1 1 0 0 1 1 0 0 D12/D19 1 0 1 0 1 0 1 0
BASS/MID/TREBLE OUTPUT (dB) 15 12 10 8 6 4 2 0 D20/D24/D28 1 1 1 1 0 0 0 0 D21/D25/D29 1 1 0 0 1 1 0 0 D22/D26/D30 1 0 1 0 1 0 1 0
BOOST/CUT MODE BOOST CUT D23/D27/D31 1 0
--9--
CXA2506Q
FADER OUTPUT (dB) - -60 -45 -35 -25 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 D32 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 D33 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 D34 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 D35 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
FADER SELECT MODE FRONT REAR D36 1 0
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 VCC, etc. 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
--10--
CXA2506Q
Timing Chart
CE
DATA
D1
D2
D34
D35
D36
Invalid
CLK t1 t1 0.5s t2 0.5s tck 1.0s tsu 0.5s th 0.5s tck tsu th t2 tL
tL tT+0.5s (tT is the maximum value for the timer operation time)
CE tce tce 4.0s
Timer Waiting Period Setting Chart (VCC = 6 to 12 V, operating temperature=-40 C to 85 C) 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 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
--11--
CXA2506Q
Electrical Characteristics VCC=8 V, Ta=25 C, Input=0 dB unless otherwise specified Item 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 Symbol ICC THD Vn Vom CS ATTm Glb Glh Gbb Gbc Gmb Gmc Gtb Gtc Vsh Vsl Vin Conditions 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 Min. -- -- -- 8 72 85 7 5 13 13 13 13 13 13 3 0 1 Typ. 21 0.003 8 -- 90 90 8 6 15 15 15 15 15 15 -- -- -- Max 28 0.01 10 -- -- -- 9 7 17 17 17 17 17 17 6 1.5 VCC-1 Unit mA % Vrms dBm
dB
DATA, CLK, CE DATA, CLK, CE IN11 to 14 IN21 to 24 VRIN1, 2 FDIN1, 2
V
--12--
Electrical Characteristic Test Circuit
C15
820p
S2
C8
0.022
10
A
10k
0.0027 C10
0.033 C12
10k C2
10k R4
R5
0.15 C4
R2
R17
36
35
34
33
32
31
30
29
28
27
26
25
S5_A
10k
10
C18 A 10
S1
B
B
C14
0.39
C6
V4 AC
10k
OPAMP R18 1k R20 1k C21
LDLC1
LDHC1
INAO1
VRIN1
TCHC1
GAIN134
R15
10k R19 1k
AC
38 GAIN11
TCMC11
TCMC12
TCLC11
TCLC12
FDIN1
GAIN12
TCO1
R15
37
39 IN14
AC
V14
V2
A B S13
V3
B S14
-60dBm V5
220p
40 IN13 DGND 20 19 GND
AC
V13
A B S12
FNTO1 R13 24 10k R12 REO1 23 10k R11 CE 22 1k R10 CLK 21 1k
CE
5V 0V 5V 0V CLK
41 IN12
AC
V12
A B S11
AC
V11
C19
100
A B S21 VCC 18 VCT 17 DATA TIMER REO2 16 15 14
43 IN21
AC
V21
44 IN22
AC
VEE 3-6V
S4
A B S22
VCC
3-6V
V22
A B S23
45 IN23
AC
V23
A B S24
1k 0.01 B S3 A R8 10k R7 C20 R14 10k
AC
V24
A
46 IN24
47 GAIN21
GAIN22
GAIN234
LDLC2
LDHC2
INAO2
VRIN2
TCHC2
TCMC21
TCMC22
TCLC21
TCLC22
TCO2
FDIN2
48
13
10k FNTO2
10k
1
10k C1 0.15 C3 820p
10 C5
2 3 5 7
4
6
8
9
10
10
11 10
R1
R3
10k
R5
0.022
C7
0.0027 C9
0.033 C11
C13
C17 A
C15
0.39
B AC V6
S5_B
12
V1
--13--
R9
42 IN11
DATA
5V 0V
CXA2506Q
Application Circuit
C15
0.39
C18 10 26
C6
R5
10k C2
820p
10k
0.15 C4
C8
0.0027 C10
0.033 C12
0.022
C14 10 28 27 25
R2 10k R4
10
36
35
34
33
32
31
30
29
LDLC1
LDHC1
INAO1
VRIN1
TCHC1
GAIN134
TCMC11
TCMC12
TCLC11
TCLC12
FDIN1
GAIN12
TCO1
37
38 GAIN11
OUTPUT SIGNAL
39 IN14
40 IN13 DGND 20 GND 19 VCC 18 VCT 17 R9 DATA 16 TIMER 15 R8 REO2 14 10k R7 1k 0.01 C20
FNTO1 R13 24 10k R12 REO1 23 10k R11 CE 22 1k R10 CLK 21 1k
TO CPU
41 IN12
INPUT SIGNAL SOURCES
44 IN22
45 IN23
46 IN24
47 GAIN21
GAIN22
GAIN234
LDLC2
LDHC2
INAO2
VRIN2
TCHC2
TCMC21
TCMC22
TCLC21
TCLC22
TCO2
FDIN2
48
13 FNTO2 10 11 12
10k
10k
1
10
2 3
0.15 C3 820p C7
4 5 6 8
7
9
R5
10k
10k C1
10
10
R1
R3
0.033 C11
0.0027 C9
0.022
C5
C13
C17
C15
CXA2506Q
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.
0.39
C21
10
--14--
C19 33
42 IN11
TO POWER SUPPLY
43 IN21
CXA2506Q
Example if Representative Characteristics
Tone Control Frequency Characteristics 20
10
15dB
Voltage (dB)
BASS 0
MID
TREBLE
-10 -15dB
-20 1 10 100 1k 10k 100k Frequency (Hz)
Loudness Frequency Characteristics 10
0
VRC=0dB
Voltage (dB)
-10
VRC=-8dB VRC=-16dB
-20
VRC=-24dB VRC=-32dB
-30
-40 1 10 100 1k 10k 100k Frequency (Hz)
--15--
CXA2506Q
Description of Operation (1) Gain of input amplifier The input selector stage may be configured as a buffer or a non-inverting amplifier.
Gain=1+R2/R1 R1 R2 36 GAIN134 37 GAIN12 VCT 39 IN14 40 IN13 41 IN12 42 IN11 38 GAIN11 CXA2506Q 33 INA01
Input amp of channel 1
(2) Loud The loudness function achieves the necessary frequency characteristics by using a filter as shown below. The resistors are built in so that fL and fH can be set by selecting C1 and C2.
34 LDHC1 fL=1/(2C1R1) fH=1/(2C2R2) R2=21.93k
3 LDHC2
C2
30k 3.79k VCT 35 LDLC1 C1 VCT
fH R1=1.84k fL
32 VRIN1
5
VRIN2 CXA2506Q
2 LDLC2
--16--
CXA2506Q
(3) Tone control BASS: LPF
fL=1/(2C1R1//R2) R1=8k 8k R2=8k CXA2506Q 8k VCT VCT fL
27 TCLC12 C1 VCT 18 TCLC22
MID: BPF
fL=1/(2C2R3) fH=1/(2C3R4) HPF 16k LPF R3=4k 4k VCT 4k R4=8k CXA2506Q 29 TCMC12 38 TCMC11 C2 VCT C3 VCT 16k fM fH fL
8 TCMC22
7 TCMC21
TREBLE: HPF
fH=1/(2C4R5) 10k 10k 10k VCT
fH
10k R5=5k CXA2506Q
31 TCHC11 C4
6 TCHC21
VCT
--17--
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.
Time constant=(0.5/10) x C [sec] VCC 10A 0.5V CE
15
CXA2506Q TIMER C
(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.
VCC
100k VCT 17 100k CXA2506Q GND
(6) Power-off Mute This function mutes the output pins FNTO1, FNTO2, REO1 and REO2, when the VCC 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 VCC/2 during power-off can be avoided.
--18--
CXA2506Q
Package Outline
Unit : mm
48PIN QFP (PLASTIC)
15.3 0.4 + 0.4 12.0 - 0.1 + 0.1 0.15 - 0.05
36
25
0.15
37
24
48
13
+ 0.2 0.1 - 0.1
1 + 0.15 0.3 - 0.1
12
0.8
0.12 M
+ 0.35 2.2 - 0.15
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE QFP-48P-L04 QFP048-P-1212-B LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.7g
NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).
--19--
0.9 0.2
13.5

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