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CXA1646Q/CXA1767Q
Electronic Volume
Description The CXA1646Q/CXA1767Q is a serial control electronic volume IC for car stereos. Features * Loudness * Volume control (1dB-step from 0dB to -87dB, -dB) * Balance * Tone control (2dB-step 2 band from -14dB to +14dB) * Fader (2dB-step to -20dB, -25dB, -35dB, -45dB, -60dB, -dB) * Input selector (4 channels) * Serial data control (DATA, CLK, CE) * Single 8V power supply * Zero-cross detection circuit Structure Bipolar IC Absolute Maximum Ratings (Ta = 25C) * Supply voltage VCC 13 * Operating temperature Topr -40 to +85 * Storage temperature Tstg -65 to +150 * Allowable power dissipation PD 350 240 Recommended Operating Condition Supply voltage VCC CXA1646Q 48 pin QFP (Plastic) CXA1767Q 40 pin QFP (Plastic)
V C C mW (Ta = 85C, 1646Q) mW (Ta = 85C, 1767Q)
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-
E92759D7Y
CXA1646Q/CXA1767Q
Block Diagram and Pin Configuration CXA1646Q
TCLC11
TCLC12
LDHC1
TCHC1
LDLC1
INAO1
FDIN1
FNTO1
VRIN1
TCO1
NC
36
35
34
33
32
31
30
29
28
27
26
25
GAIN1 37 LOUD IN14 38 8dB STEP VOLUME 1dB STEP VOLUME FADER
NC
24 REO1
TONE
23 CE
IN13 39
22 TEST
INPUT SW
VCTBUFF VCTBUFF 21 CLK
IN12 40
IN11 41 LATCH NC 42 ZCDET NC 43 SHIFT REGISTER IN21 44 LATCH CONTROL
20 GND
19 NC
18 NC
17 VCC
INPUT SW
IN22 45
VCTBUFF VCTBUFF
16 VCT
IN23 46
15 DATA
IN24 47 LOUD GAIN2 48
VOLUME 8dB STEP
VOLUME 1dB STEP
TONE
FADER
14 INIT
13 REO2
1
2
3
4
5
6
7
8
9
10
11
12
TCHC2
TCLC22
FNTO2
LDLC2
INAO2
FDIN2
NC
LDHC2
VRIN2
TCLC21
-2-
TCO2
NC
CXA1646Q/CXA1767Q
CXA1767Q
TCLC11
TCHC1
TCLC12
LDHC1
LDLC1
INAO1
VRIN1
30
29
28
27
26
25
24
23
FDIN1
TCO1
22
21
GAIN1 31 LOUD IN14 32 8dB STEP VOLUME 1dB STEP VOLUME FADER
FNTO1
20 REO1
TONE
19 CE
IN13 33
INPUT SW
18 TEST VCTBUFF VCTBUFF
IN12 34
17 CLK
LATCH IN11 35 ZCDET IN21 36 SHIFT REGISTER
LATCH CONTROL 16 GND
15 VCC
IN22 37
14 VCT
INPUT SW
VCTBUFF VCTBUFF 13 DATA
IN23 38
IN24 39 LOUD GAIN2 40
VOLUME 8dB STEP
VOLUME 1dB STEP
12 INIT TONE FADER 11 REO2
1
2
3
4
5
6
7
8
9
10
TCLC22
TCHC2
LDHC2
-3-
TCLC21
FNTO2
LDLC2
VRIN2
TCO2
INAO2
FDIN2
CXA1646Q/CXA1767Q
Pin Description (Pin No. in the parenthesis is for CXA1767Q.) Pin No. Symbol I/O resistance Pin voltage Equivalent circuit Description
Vcc
2 (1) 35 (30)
LDLC2 LDLC1
5.28k VCT
Sets loudness low cut-off frequency.
GND
Vcc
3 (2) 34 (29)
LDHC2 LDHC1
7.97k VCT
Sets loudness high cut-off frequency.
GND
Vcc
4 (3) 33 (28)
INAO2 INAO1
-- VCT
Input selector output
GND
Vcc
5 (4) 32 (27)
VRIN2 VRIN1
50k VCT
Volume input
GND
-4-
CXA1646Q/CXA1767Q
Pin No.
Symbol
I/O resistance Pin voltage
Equivalent circuit
Description
Vcc
6 (5) 31 (26)
TCHC2 TCHC1
5k VCT
Sets tone high frequency.
GND
Vcc
7 (6) 30 (25)
TCLC21 TCLC11
8k VCT
Sets tone low frequency.
GND
Vcc
8 (7) 29 (24)
TCLC22 TCLC12
8k VCT
Sets tone low frequency.
GND
Vcc
9 (8) 28 (23)
TCO2 TCO1
-- VCT
Tone control output
GND
-5-
CXA1646Q/CXA1767Q
Pin No.
Symbol
I/O resistance Pin voltage
Equivalent circuit
Description
Vcc
10 (9) 27 (22)
FDIN2 FDIN1
24k VCT
Fader input
GND
Vcc
11 (10) 26 (21)
FNTO2 FNTO1
-- VCT
Front output
GND
Vcc
13 (11) 24 (20)
REO2 REO1
-- VCT
Rear output
GND
Vcc
14 (12)
INIT
-- --
System reset
GND
-6-
CXA1646Q/CXA1767Q
Pin No.
Symbol
I/O resistance Pin voltage
Equivalent circuit
Vcc
Description
15 (13)
DATA
~ - --
Serial data input
GND
16 (14) 17 (15) 20 (16)
VCT VCC GND
-- VCT VCC GND
Vcc
1 VCC 2 +power supply GND
21 (17)
CLK
~ - --
Serial clock
GND
22 (18)
TEST
-- --
Vcc
Test. Leave open.
23 (19)
CE
~ - --
Latch enable
GND
-7-
CXA1646Q/CXA1767Q
Pin No.
Symbol
I/O resistance Pin voltage
Equivalent circuit
Description
Vcc
37 (31) 48 (40)
GAIN1 GAIN2
10k VCT
10k 10k
Sets input amplifier gain to 6dB by connecting to VCT. 0dB at open.
GND
Vcc
38 (32) 39 (33) 40 (34) 41 (35) 44 (36) 45 (37) 46 (38) 47 (39)
IN14 IN13 IN12 IN11 IN21 IN22 IN23 IN24
50k VCT
Signal input
GND
Reset Reset is performed by lowering the INIT pin below 1V when CLK is High. Reset is disabled when CLK is Low. The following table shows the reset status. Mode INPUT VRC1 VRF1 VRC2 VRF2 LOUD TONE BASS TONE TREBLE FADER Set value 1 - -7dB - -7dB OFF 0dB 0dB 0dB, REAR
-8-
CXA1646Q/CXA1767Q
Data Format (a) Data allocation FAST 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 LAST BIT D32 MSB NOP ISW LOUD
VRC1
VRF1
VRC2
VRF2
TONE BASS
TONE TREBLE
FADER
FADER SELECT
LSB
-9-
CXA1646Q/CXA1767Q
(b) Set table * NOP Set value -- D1 0 D2 0
* ISW Set value IN14/IN24 IN13/IN23 IN12/IN22 IN11/IN21 D1 1 1 0 0 D2 1 0 1 0
* LOUD Set value ON OFF D5 1 0
* VRC1/VRC2 Set value O -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
* VRF1/VRF2 Set value O -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
- 10 -
CXA1646Q/CXA1767Q
* TONE BASS/TREBLE Set value 14 12 10 8 6 4 2 0 D20/D24 1 1 1 1 0 0 0 0 D21/D25 1 1 0 0 1 1 0 0 D22/D26 1 0 1 0 1 0 1 0
* BOOST/CUT Set value BOOST CUT D23/D27 1 0
* FADER Set value - -60 -45 -35 -25 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 D28 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 D29 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 D30 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 D31 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
* FADER SELECT Set value Attenuation of front signal Attenuation of rear signal D32 1 0
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CXA1646Q/CXA1767Q
* DATA TIMING
CE
DATA
D1
D2
D3
D31
D32
CLK
min 0.5s
max 1MHz
min 0.5s
CE
min 4s
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CXA1646Q/CXA1767Q
Electrical Characteristics Item Circuit current Total harmonic distortion factor Output noise voltage Maximum output voltage Separation Maximum attenuation factor Loudness Bass max. boost gain Bass max. cut gain Treble max. boost gain Treble max. cut gain Gain switching Input voltage H L LOW HIGH Symbol ICC THD Vn Vom CS ATTm Glb Glh Gbb Gbc Gtb Gtc Gh Vsh Vsl GAIN = VCT DATA, INIT CLK, CE IN11 to 14 IN21 to 24 VRIN1, 2 FDIN1, 2
(VCC = 8V, Ta = 25C unless otherwise specified) Conditions No signal 1kHz, 5dBm Shortcircuit at input, Aweight 1kHz 1kHz Min. -- -- -- 8 72 85 100Hz, VRC = -16dB 10kHz, VRC = -16dB 7 7 12 12 12 12 5 3 0 Typ. 17 0.005 7 -- 90 90 8 8 14 14 14 14 6 -- -- Max. 21 0.01 10 -- -- -- 9 9 16 16 16 16 7 6 1.5 Unit mA % Vrms dBm dB dB dB dB dB dB dB dB dB V V
Input voltage range
Vin
1
--
VCC - 1
V
- 13 -
S1 R11 10k R12 RV1 R3 1k
OP AMP
C11 0.047 S2 34 29 26 R1 AC V5 C1 220p 5V V4 TEST 22 R6 1k V5 GND 20 NC 19 CXA1646Q NC 18 V2 VCC 17 C2 10 VCT 16 V1 DATA 15 DATA INIT 14 C1 0.001 REO2 13 5V 0V CLK CLK 21 0V CE 0V 25 33 32 30 28 27 31 R5 1k
36
35
NC
C12 0.047
C13
C14 10
C15 0.22 C17 10
TCO1
LDLC1
LDHC1
INAO1
TCHC1
TCLC11
TCLC12
FNTO1 NC
REO1 24 R7 1k CE 23
37 GAIN1
S14
AC V14
38 IN14
S13
Electrical Characteristic Test Circuit
AC V13
39 IN13
VRIN1
FDIN1
S15
S12
5V
AC V12
40 IN12
S11
AC V11
41 IN11
LDLC2
LDHC2
INAO2
TCHC2
TCLC21
NC
TCLC22
FNTO2
VRIN2
TCO2
1 3 C23 4 7
2
5
6
8 C24
9
FDIN2
10 C27 C25 0.22
11
12
C21 0.047 C22 0.0047 R21 10k R22 10k
NC
- 14 -
42 NC
43 NC
S21
AC V21
44 IN21
S22
AC V22
45 IN22
S23
AC V23
46 IN23
S24
AC V24
47 IN24
S25
48 GAIN2
OP AMP CXA1646Q/CXA1767Q
C12 0.0047
ON OFF 33 32 30 29 26 25 28 27 31
6DB 0DB
C11 0.047
36
35
34
NC
C14 0.0068
C15 10
C13 10
C16 0.22
C17 10
NC
Application Circuit
TCO1 FDIN1
LDLC1
LDHC1
TCHC1
TCLC11
38 IN14 TEST 22 CLK 21 GND 20 NC 19 CXA1646Q NC 18 VCC 17 VCT 16 DATA 15 INIT 14 C1 0.001 C2 10
TCLC12
FNTO1
REO1 24 CE 23
37 GAIN1
39 IN13
40 IN12
41 IN11
42 NC
INAO1 VRIN1
C3 33
FDIN2
LDLC2
TCHC2
TCLC22
NC
TCO2
FNTO2
10 11
LDHC2
INAO2
VRIN2
1 4 7 8
2
3
5
6 9
TCLC21
12
ON OFF C23 10 C25 C24 10 0.0068
6DB 0DB
C21 0.047
C22 0.0047
C27 C26 10 0.22
CXA1646Q/CXA1767Q
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.
NC
- 15 -
REO2 13
43 NC
44 IN21
45 IN22
46 IN23
47 IN24
48 GAIN2
CXA1646Q/CXA1767Q
CXA1646Q/CXA1767Q Tone control characteristics
+14dB 10 +12dB +10dB +8dB +6dB
Response [dB]
+4dB 0 +2dB 0dB -2dB -4dB -6dB -8dB -10 -10dB -12dB -14dB 10 100 1k Frequency [Hz] 10k 100k
CXA1646Q/CXA1767Q Loud characteristics
VRC = 0dB 0 VRC = -8dB
Response [dB]
VRC = -16dB 10 VRC = -24dB
-20
10
100
1k Frequency [Hz]
10k
- 16 -
CXA1646Q/CXA1767Q
Setting Constants * LOUD The loudness function achieves the necessary frequency characteristics by passing through filter shown below. The resistor is built in the IC so that fL and fH are set by selecting CLDLC and CLDHC. I/fL = 2 CLDLCR1 I/fH = 2 CLDHCR2
CLDHC
R2 7.97k
28k 13.2k R1 5.28k CLDLC
AGND
AGND
fH
fL
- 17 -
CXA1646Q/CXA1767Q
* TONE CONTROL The tone control function achieves the necessary frequency characteristics by passing through LPF and HPF shown below. The resistor is built in the IC so that fL and fH are set by selecting CTLC12 and CTCHC. I/fL = 2 CTCLC12 (R3//R4) I/fH = 2 CTCHCR3 LPF
R4 8k CTCLC12 R3 8k 8k 8k
AGND
AGND
AGND
HPF
10k
10k
10k
10k
R3 5k CTCHC
AGND
AGND
fL
fH
- 18 -
CXA1646Q/CXA1767Q
* 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
45k
VCT
45k
GND
- 19 -
CXA1646Q/CXA1767Q
Package Outline CXA1646Q
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).
- 20 -
0.9 0.2
13.5
CXA1646Q/CXA1767Q
CXA1767Q
40PIN QFP (PLASTIC)
9.0 0.4 + 0.4 7.0 - 0.1 30 21 + 0.35 1.5 - 0.15 + 0.1 0.127 - 0.05 0.1
31
20
A
40
11
1 0.65 + 0.15 0.1 - 0.1
+ 0.15 0.3 - 0.1
10 0.12 M
0.5 0.2
(8.0)
PACKAGE STRUCTURE
PACKAGE MATERIAL LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.2g
DETAIL A SONY CODE EIAJ CODE JEDEC CODE QFP-40P-L01 QFP040-P-0707
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