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PDF CXA2513M Data sheet ( Hoja de datos )
| Número de pieza | CXA2513M | |
| Descripción | 3-Band Preset Graphic Equalizer IC (with standby and memory on last preset mode) | |
| Fabricantes | Sony Corporation | |
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CXA2513M
3-Band Preset Graphic Equalizer IC (with standby and memory on last preset mode)
Description
The CXA2513M is a 3-band preset graphic equalizer
developed for stereo set, cassette tape recorder with
radio, etc. It has 5 modes: FLAT, ROCK, VOCAL,
POP and JAZZ. The selection is via 5 control pins.
The center frequencies of three bands are 100Hz,
1kHz and 10kHz. The center frequencies of these
bands are determined by 2 external resistors. It also
has a standby feature. When the standby pin goes
low, the IC stores the last preset mode. When this
pin goes high, the IC restores the last preset mode
before standby. It can be initialized to any one of the
two preset modes (FLAT, ROCK) upon power up.
Features
• Very few external parts
• 3-band monolithic filters (100Hz, 1kHz, 10kHz)
• The center frequencies of the band-pass filters can
be adjusted
• 5 preset modes (FLAT, ROCK, VOCAL, POP, JAZZ)
• Equips with output ports to drive external LEDs
• Mute pulse output pin
• Standby feature with last preset mode memory
• Can be initialized to one of the two preset modes
(FLAT or ROCK)
20 pin SOP (Plastic)
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage
VCC 12
V
• Allowable power dissipation PD
600 mW
• Storage temperature
Tstg –65 to +150 °C
Recommended Operating Conditions
• Supply voltage
VCC 4.5 to 10 V
• Operating temperature
Topr –20 to +75 °C
Applications
Preset graphic equalizer for cassette tape recorder
with radio and portable stereo
Structure
Bipolar silicon monolithic IC
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–
E97741-PS
1 page  
CXA2513M
Pin
No.
Symbol
Voltage
I/O
resistance
Equivalent circuit
VCC
40k
40k
Description
12 MUTE
0 300k
147
12
40k
15k
Mute pulse output pin.
300k
GND
13
LOW
FREQ
13
147
10k
VCC
7.5k
VCC
0
Low frequency adjustment pin.
Set the center frequency of
the bass.
15 VCC
16
STAND
BY
VCC
—
15
GND
VCC
Power supply pin.
VCC
147
16
— 20k
20k
Standby pin.
When not connected, the IC in
standby.
5k 5k 5k 5k 5k 5k
When connected to VCC, the
IC in normal operation
50k
GND
17
MUTE
DET–
18
MUTE
DET+
VCC
——
147 10k
Negative input of the mute
detector comparator.
17 10k
18
147
——
Positive input of the mute
4k 4k
detector comparator.
GND
–5–
5 Page 
CXA2513M
Description of Operation
1. Graphic Equalizer
• Conventional system
VI
R1 Operational amplifier
Vo
RV R2
CUT-OFF
Z (s)
BOOST
L
C RO = R1 = R2
R
Fig. 1
Fig. 1 indicates the conventional graphic equalizer system. This circuit performs boost and cut-off near "fO"
controlled by the potentiometer Rv. ("fO" is resonance frequency determined by Z (s) (formed LCR).) The
operation can be seen as follows: When the LCR circuit goes to the far left of Rv, a state of graphic equalizer
becomes maximum cut-off. At that time, assuming transmittance as T (s), the following expression can be
obtained.
Z (s)
T (s) =
Z (s) + Ro
Here as
Z (s) = sL + R + 1
sC
LCS2 + RCS + 1
Then T (s) =
LCS2 + (R + RO) CS + 1
Defining fO as fO =
ωo
2π
, ωo as ωo =
1
LC
, and Q as Q = ωoL
R
, the frequency response can be obtained
at cut-off
Also, when LCR circuit goes to the far right of Rv, a state of graphic equalizer becomes maximum boost. At
that time transmittance is:
Z (s) + RO
LCS2 + (R + RO) Cs + 1
T (s) =
=
Z (s)
LCS2 + RCS + 1
Defining fO, ωo and Q as for cut-off the frequency response can be obtained at boost.
– 11 –
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet CXA2513M.PDF ] | |
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