Document
CXA1352AS
2-channel 5 Elements Graphic Equalizer IC
Description The CXA1352AS is a bipolar IC for graphic equalizer use. All controls are DC performed while the addition of single-potentiometers easily composes a 2-channel graphic equalizer. Features • Microcomputer control possible • Built-in electronic volume • Built-in pseudo loudness function • Built-in balance function • Each channel corresponds to 5 elements • 2 channels of FIX OUT and LINE OUT pins Applications Graphic equalizer for cassette tape recorder with radio, mobile stereo and portable stereo Structure Bipolar silicon monolithic IC 22 pin SDIP (Plastic)
Absolute Maximum Ratings (Ta=25 °C) • Supply voltage VCC 12 V • Storage temperature Tstg –65 to +150 °C • Allowable power dissipation PD 1200 mW Operating Conditions • Supply voltage • Operating temperature
VCC DVCC Topr
4.0 to 10.0 3.5 to VCC –20 to +75
V V °C
Block Diagram and Pin Configuration
OUT2 (VARIABLE) 13 10 OUT1 (VARIABLE)
10kHz
LINE OUT2
OUT2 (FIX)
DVCC
1kHz
4kHz
DC2
IN2
VCC
22
21
20
19
18
17
14dB
16
15
14
12
29dB
VOLUME
GRAPHIC EQUALIZER CONTROL GRAPHIC EQUALIZER BIAS
14dB
29dB
VOLUME
1 400Hz
2 100Hz
3 BAL
4 VOL
5 DC1
6 1N1
7 GND
8 LINE OUT1
9 OUT1 (Fix)
11 ISET
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—
VG
E91912B95-TE
CXA1352AS
Pin Description Pin No. 1 2 20 21 22 Symbol Voltage 400 Hz 100 Hz 10 kHz 4 kHz 1 kHz I/O resistance
DVCC 1 2
Equivalent circuit
Description Graphic equalizer control pin DC input
VCC
DVCC 2
147 40k 20k
10k
60 kΩ
4 20 21
4
VOL
22 GND
Volume control pin DC input
DVCC 9k 147 40k
VCC
3
BAL
DVCC 2
60 kΩ
3 20k
Balance control pin DC input
GND
VCC
30k
5 18
DC1 DC2
VCC 2
147
—
5 18
Connects the DC feedback capacitor of the LPF used in the 100 Hz graphic equalizer
GND
VCC
6 17
IN1 IN2
VCC 2
25 kΩ
147 6 17 50k 5k 50k 1k GND
Signal input pin
7
GND
GND
7
GND pin
—2—
CXA1352AS
Pin No.
Symbol Voltage
I/O resistance
Equivalent circuit
Description
VCC
8 15
L OUT1 L OUT2
VCC 2
147
300 300
27k
0
8 15
Line output pin
GND
VCC
9 14
F OUT1 F OUT2
VCC 2
147
300 300
30k
0
9 14
Fix output pin
GND
VCC
10 13
OUT1 OUT2
VCC 2
147
250 250
20k
0
10 13
Electronic volume output pin
GND
VCC
147
300
11
ISET
1.3 V
0
11
Reference current setting pin (for graphic equalizer) Normally 160 kΩ resistor is connected
GND
—3—
CXA1352AS
Pin No.
Symbol Voltage
I/O resistance
Equivalent circuit
Description
VCC 40k
12
VG
VCC 2
20 kΩ
147 12 40k
300 300
Signal reference voltage pin A capacitor is connected for ripple rejection
GND
16
VCC
VCC
16
VCC
Power supply pin (operation)
DVCC VCC
19
19
DVCC
DVCC
60 kΩ
30k
Power supply pin (control)
30k
42k GND
—4—
CXA1352AS
Electrical Characteristics No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Item Supply voltage (operation) Supply voltage (control) Current consumption Reference input level Reference output level Reference LINE output level Reference FIX output level Graphic equalizer setting frequency (1) Graphic equalizer setting frequency (2) Graphic equalizer setting frequency (3) Graphic equalizer setting frequency (4) Graphic equalizer setting frequency (5) Graphic equalizer frequency deviation Maximum boost (1) Maximum boost (2) Maximum cut (1) Maximum cut (2) Total harmonic distortion Volume attenuation (1) Volume attenuation (2) Balance adjustment (1) Balance adjustment (2) Noise level Output offset voltage Symbol VCC DVCC ICC VIN VOUT VLINE VFIX GEQ1 GEQ2 GEQ3 GEQ4 GEQ5 ∆ EQ GEQB1 GEQB2 GEQC1 GEQC2 THD VOL1 VOL2 BAL1 BAL2 VNOIS VOFF Graphic equalizer ALL FLAT, Volume MAX, f=1 kHz f=1 kHz Graphic equalizer ALL FLAT, f=1 kHz LPF cut off frequency (–3 dB) BPF (1) central frequency BPF (2) central frequency BPF (3) central frequency HPF cut off frequency (–3 dB) Graphic equalizer ALL FLAT, Volume MID Test conditions
(Ta=25 °C, VCC=8 V, DVCC=5 V) Min. 4.0 3.5 8.0 — Typ. — — 12.0 –34.0 Max. 10.0 VCC 16.0 — Unit V V mA dBm dBm dBm dBm Hz Hz kHz kHz kHz % dB dB dB dB % dB dB dB dB dB V
–23.0 –20.0 –17.0 –6.5 –4.5 –2.5
–23.0 –20.0 –17.0 — — — — — 200 400 1.0 4.0 8.0 — — — — —
Cut off frequency and central –20 0 20 frequency deviation f=400 Hz, 1 kHz, 4 kHz 9.0 11.2 14.0 maximum boost f=100 Hz, 10 kHz maximum boost 8.0 10.7 14.0 f=400 Hz, 1 kHz, 4kHz –13.0 –10.7 –8.5 maximum cut f=100 Hz, 10 kHz maximum cut –12.0 –9.5 –7.0 RL=2 kΩ, Graphic equalizer ALL FLAT, Volume MAX, f=1 kHz, — 0.25 1.0 Reference +10 dB is input Graphic equalizer ALL FLAT, –1.5 0 1.5 Volume MAX, f=1 kHz Graphic equalizer ALL FLAT, — –94.4 –80.0 Volume MIN, f=1.