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PDF TA2056FN Data sheet ( Hoja de datos )
| Número de pieza | TA2056FN | |
| Descripción | 1.5V CORDLESS HEADPHONE RECEIVER | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2056FN
1.5V Cordless Headphone Receiver
TA2056FN
The TA2056FN is an infrared ray linear audio signal receiver IC
developed for IR cordless headphone systems.
It is two built in FM receivers for stereo and muting function etc.
Features
· Two built−in FM receivers for stereo
(f = 2.3 / 2.8MHz)
· Excellent spurious radiation by direct detection type
· Built−in muting function (retuned noise detection type)
· Built−in buffer amplifier for muting signal detection
· Built−in muting amplifier
· Built−in detector circuit
· Muting attenuation (VCC = 1.2V, Ta = 25°C)
ATT = 65dB (typ.)
· Two built−in RF amplifiers
· Low supply current (VCC = 1.2V, Ta = 25°C)
ICC = 4.0mA (typ.)
· Operating supply voltage range (Ta = 25°C)
VCC (opr) = 0.95~2.2V
Weight: 0.14g (typ.)
(*) Handle with care to prevent devices from deterioration by static electricity.
1 2002-10-30
1 page  
TA2056FN
Application Note
1. Input of RF amplifier (pin(1) / (24))
A resistor (R ≤ 330Ω) should be connected to GND through a capacitor. Because input impedance of this terminal
is designed for 3.3kΩ (typ.), internal circuit doesn't operate normally.
2. Muting function (retuned noise detection type)
The muting function is operated by audio amplifier
muting which is decided by noise level which is
taken out by high-pass filter from recovered output
voltage of channel A.
Muting signal is detected only channel A, not from
channnel B.
The detected noise level peaks near the input
limiting voltage. Bellow the input limiting voltage,
the noise level decreases and there is a possibility
that the muting function doesn't operate normally.
Thus in case that muting sensitivity is set near the
input limiting voltage, it is necessary to caution that
the muting function operate normally.
VOD – Vin(15)
0
0dB = 45mVrms
VCC = 1.2V
fin = 100kHz
20
40
60
80
0 2 4 6 8 10 12
Input signal voltage of pin (15) Vin(15) (mVrms)
Fig.muting sensitivity
3. Pattern layout
The TA2056FN has three VCC and GND terminals. External parts should be connected with each VCC and GND
shortly, these pattern layouts should be isolated.
RF VCCA (pin(21))、RF GNDA (pin(23))………...RF amp. (A-ch), part of LIM amp. (A-ch)
RF VCCB(pin(4))、RF GNDB (pin(2))…………….RF amp. (B-ch), part of LIM amp. (B-ch)
VCC (pin(6))、GND (pin(19))……………………... Except RF VCC and RF GND
5 2002-10-30
5 Page 
TA2056FN
RESTRICTIONS ON PRODUCT USE
000707EBA
· TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc..
· The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer’s own risk.
· The products described in this document are subject to the foreign exchange and foreign trade laws.
· The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
· The information contained herein is subject to change without notice.
11 2002-10-30
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet TA2056FN.PDF ] | |
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