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Número de pieza | TA8184 | |
Descripción | DUAL CHANNEL VOLTAGE/TONE CONTROL IC | |
Fabricantes | Toshiba | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de TA8184 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
No Preview Available ! TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8184P,TA8184F
Dual Channel Voltage/Tone Control IC
TA8184P/F
The TA8184P, TA8184F is DC controlled dual volume, balance,
tone (Bass and treble) IC.
It is suitable for car stereo, radio cassette, music center, TV
multiplex sound receiver and remote controlled applications.
Features
· Dual channel
· Wide volume control range
: Maximum attenuation ATT = 100dB (typ.)
(Vol. → Min, VIN = 1 Vrms, BW = 400 Hz~30 kHz)
· Wide tone control range
: Bass VB = +12.5~−12.5dB (typ.), (f = 100 Hz)
: Treble VT = +12.5~−12.5dB (typ.), (f = 10 kHz)
· Built in loudness control
· Operating supply voltage range
: VCC (opr) = 7.5~15 V (TA8184P) (Ta = 25°C)
: VCC (opr) = 7.5~12.5 V (TA8184F) (Ta = 25°C)
TA8184P
TA8184F
Weight
DIP20-P-300-2.54A: 1.4 g (typ.)
SSOP24-P-300-1.00: 0.31 g (typ.)
1 2002-03-05
1 page TA8184P/F
Operating Precautions and Application Methods (Pin No.: (P/F))
1. How to determine tone controlled frequency characteristic time constants
Bass characteristics determining elements: CL, CLB terminals ((4/5), (5/6), (16/19), (17/20)) Figure 1
Low-bandwidth cut-off frequencies fL1, fL2, fL3 of bass characteristics are determined by the following
equations :
fL1 =
2
F
•
1
CLB • 10
k
9
--- (1)
(10 kΩ is determined in IC interior)
f L2
=
2F
1
• CLB
•1k
9
---- (2)
(1 kΩ is determined in IC interior)
f L3
=
2
F
•
1
CL • 10
k
9
---- (3)
(10 kΩ is determined in IC interior)
Figure 1 Bass characteristics
(during boosting)
Under reference circuits of CL = 0.33 µF and CLB = 10 µF, setting is made as follows:
fL1 ≈ 1.59 Hz, fL2 ≈ 15.9 Hz, fL3 ≈ 48.2 Hz
When the characteristics during boosting are considered, crossing with 0dB axis is made at fL1, increase
starts by 20dB/dec., and flat characteristics of Gain = 20dB is obtained at fL2.
Low-bandwidth f response is determined at fL3-namely, CL and gain starts decreasing from fL3 by −20dB
/dec.
As explained above, low-bandwidth characteristics can be varied by varying CL and CLB.
Treble characteristics determining element: CH ((3/4), (18/21))
Figure 2 High-bandwidth cut-off frequencies f H1 and f H2 of treble characteristics can be determined by
the following equations:
f H1 =
2
F
•
1
CH • 10
k
9
---- (4)
(10 kΩ is determined in IC interior)
f H2
=
2F
1
• CH • 1k 9
----- (5)
(1 kΩ is determined in IC interior)
Under reference circuit of CH = 0.0082 µF setting is
made as follows:
Figure 2 Treble characteristics
(during boosting)
fH1 ≈ 1.94 kHz, fH2 = 19.4 kHz
As explained above, high-bandwidth characteristics can be varied by varying CH.
By creating the status of CL → decrease and CH → increase, low/high bandwidth gains
(f = 100 Hz, 10 kHz) increase but gain near f = 1 kHz is also increased.
On the other hand, when the status of CL → increase and CH → decrease is created, take note that gain
near f = 1 kHz approaches 0dB while low/high-bandwidth gains are decreased.
2. Loudness control
By connecting pin (9/11) (loudness terminal) to pin (8/9) (volume terminal), “Loudness” status can be
created. Loudness boost amount is determined by pin (9/11) DC voltage (refer to the subsequently described
GV-V (9/11) data).
Loudness is controlled by considering that sound levels will become uniform for all frequency levels
through increasing low/high-bandwidth gains when volume is reduced-namely, sound volume is low.
When loudness control is not used, connect pin (9/11) to pin (10/12) (reference terminal).
The capacitor (typ. 0.047 µF) between pin (9/11) and GND is for reducing pop sound during loudness → ON
while the capacitor (typ. 1 µF) between pin (8/9) and GND is used for the same purpose during loudness →
OFF.
5 2002-03-05
5 Page TA8184P/F
11 2002-03-05
11 Page |
Páginas | Total 16 Páginas | |
PDF Descargar | [ Datasheet TA8184.PDF ] |
Número de pieza | Descripción | Fabricantes |
TA8182FN | TV/FM SYSTEM F/E (1.5V USE) | Toshiba |
TA8184 | DUAL CHANNEL VOLTAGE/TONE CONTROL IC | Toshiba |
TA8184F | DUAL CHANNEL VOLTAGE/TONE CONTROL IC | Toshiba |
TA8184P | DUAL CHANNEL VOLTAGE/TONE CONTROL IC | Toshiba |
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