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TA2061AF
INFRARED LINEAR AUDIO SIGNAL TRANSMIT IC
TOSHIBA TA2061AF
TENTATIVE TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA20tiMAF
INFRARED LINEAR AUDIO SIGNAL TRANSMIT IC
TA2061AF is an IC developed for use in the transmitter of
infrared audio signal transmit/receive systems. The device
incorporates a 2.3/2.8MHz voltage controlled oscillator
(VCO) for the linear audio signal transmission band.
The device is ideal for the transmitters of wireless stereo
headphones and wireless microphones that use infrared
transmission.
FEATURES
SSOP16-P-225-1.00A
o Built-in two crystal VCO channels for audio signal .
transmission. : fc = 2.3/2.8MHz (Typ.) Weight : 0.14g (Typ.)
o Built-in pre-emphasis : C = 75 pt; (Typ.)
o VCO fo adjustment on/off function.
0 Built-in audio signal AGC (on/off)
o Built-in auto on/off function (on/off)
o Built-in simple surround function (on/off)
Lout = 1.5Lin - 0.5Rin
Rout = 1.5Rin - 0.5Lin
o Few external parts
It Compact package , 16-pin 1mm pitch flat package
dt Operating supply voltage range
I VCC(opr_) = 4.0 to 16.0V (Ta = 25°C)
980910EBAI
OTOSHIBA is continually working to improve the quality and the 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 observe standards of safety, and to avoid
situations in which a malfunction or failure of a TOSHIBA product 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 products specifications. Also, please keep in mind the precautions
and conditions set forth in the TOSHIBA Semiconductor Reliability Handbook.
OThe products described in this document are subject to the foreign exchange and foreign trade laws.
OThe 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.
OThe information contained herein is subject to change without notice.
2000-02-08 1/9
TOSHIBA
BLOCK DIAGRAM
TA2061AF
ON/OFF Vco Adjustment
SW CON/OFF SW / LED
u. + LL e", L-ch
L-ch 0.22 M' j': kJON E C; 0 OUT 2.3 MHz
IN Cl - + V I OFF
Ch AGC T/C Iff (R) ,"d
Q9 QI5/ 11.b' l?' Q9 Q11 49 9
Vref Det.
. AGC Pre
: emphasis VCO - BUFFER
D _1 "Lout=L+K.(L-R) I
5"‘Rout = R - K-(L - R)
. AGC emgfasis VCO - BUFFER
Det. - . . .
MIX AMP /L_l
AUTO OFF T/C GND
fih, 2 NF 3 Gh, (ish, re 7
"s?.) se/
R-ch (h22 trF + t + t t C} oON
IN Cl - + , Ps I N I C) = OFF
0 SURROUND
ON/OFF sw
2000-02-08 2/9
TOSHIBA
TA2061AF
FUNCTIONS AND PINS
1. Matrix surround function
Simple surround processing by surround function on/off switch (pin 7)
surround off : 0.0V s V7 s 2.0V
surround on : 4.0V s V7 s VCC or open
When surround is on, L and R channel signals are matrix-processed at audio signal level.
(*)Where L and R channels input/output signals are Lin, Rin, Lout, and Rout
Lout = 1.5 x Lin - 0.5 x Rin
Rout = 1.5 x Rin - 0.5 x Lin
(*)When Lin = Rin (same phase)
Lout = Rout = 1.0 x Rin = 1.0 x Rin
(*)When Rin = -Rin (opposite phase)
Lout = 2.0 X Lin = -2.0 X Rin
Rout = 2.0 x Rin = -2.0 x Lin
The above method implements simple surround sound which emphasizes stereo characteristics.
2. VCO-fo adjustment on/off function
If the VCO fo adjustments on/off switch (pin 10) can be externally controlled, VCO frequency of the
L-channel (2.3 MHz) can be adjusted using pin 6.
VCO frequency of the R-channel (2.8 MHz) can be adjusted using pin11.
Adjust based on Vref (pin 15) using the potentiometer. The adjustment range is about :25 kHz at
GND-Vref with Vref/2 as the center.
Note that even when the voltage applied to the adjustment pin is 1/2 Vref, the fo frequency
fluctuates due to switching from off to on.
fo adjusted externally : Open Pin 10
fo fixed internally .' Connect pin 10 to GND
3. Audio AGC on/off function
The AGC function of the audio signal processing portion can be switched on/off using pin 14.
AGC off : Connect pin 14 to GND
AGC on : Open pin 14
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Supply Voltage VCC 14 V
Power Dissipation PD (Note) 400 mW
Operating Temperature Topr - 25--75 "C
Storage Temperature Tstg - 55-150 "C
2000-02-08 3/9
TOSHIBA TA2061AF
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VCC = 9V, Vin = 245 mV (-1dBm), f = 1 kHz, Ta = 25°C, Surround off,
fo adjustment off, AGC on
CHARACTERISTIC SYMBOL T53]. TEST CONDITION MIN. TYP. MAX. UNIT
Stand-by Current 'STB - Auto off (Vin = 0, V3 = 0V) - 2.6 3.3 mA
Operating Current ICC - ON - 19.0 26.0 mA
Input Signal Level VinMAX - THD s 10% - 2.0 - Vrms
Channel Separation Sep. - (Note I) - 45 - dB
Total Harmonic Distortion THD - - - 0.3 - %
Frequency Response fres - sf,,',',',],':,".,',;" kHz, after de -3 0 3 dB
. . . S/N-L - L-channel (Note 2) 52 55 -
Signal To Noise Ratio S/N-R - R-channel (Note 2) 51 54 - dB
fo-L - L-channel 2275 2300 2325
VCO Frequency fo-R - R-channel 2775 2800 2825 kHz
Maximum Frequency - - L-channel 70 100 120 kHz
Deviation - - R-channel 60 80 100
Input Resistance RIN - - - 47 - k0
. . . . MS-L - L-channel 18 22.5 28
Modulation Sensitivity MS-R - R-channel 18 22.5 28 kHz
3rd Spurious 3rd-Spr - - - 40 - dB
VO-L - L-channel 270 300 340
RF Output Level VO-R - R-channel 270 300 340 mV
Channel Balance C.B. - - -3 - 3 dB
ALC Attack Time TATK - (Note 3) - 0.3 - s
ALC Recovery Time TRCV - (Note 4) - 20 - s
. On-signal Level
Auto ON/OFF V'ON - (Vin-L = Vin-R) - 3 - s
TOFF - Time until input signal - 130 -
Pre-emphasis P-Emf - - - 75 - ,us
(Note 1) : Set the output level of the channel to which signals are input to OdB.
(Note 2) : Set the output level to OdB with 22.5 kHz deviation.
(Note 3) : Change Vin from 77.5 mVrms (-20dBm) to 1.95 Vrms (+8dBm). Measure time
until the output signal level convergence value reaches -1dB.
(Note 4) : Change Vin from 1.95 Vrms (+8dBm) to 77.5 mVrms (-20dBm). Measure time
until the output signal level convergence value reaches -1dB.
2000-02-08 4/9
2000-02-08 5/9
TEST CIRCUIT
DUT vcc -<1\
[I _ a u 1
3rir"O
’ ZSAIOAS
31/170 0 (TEE
RF MEAS
L-OUT fl
COUNTER L-ch
- COUNTER AF OUT
au’L'o
U022 irittr0 o
1 98A?
" 25A1048
TA2061AF—5
TOSHIBA
TA2061AF
TOSHIBA
TOTAL HARMONIC DISTORTION THD
AUDIO SIGNAL OUTPUT LEVEL
AUDIO SIGNAL OUTPUT LEVEL Vout (d8)
VCOFREQUENCY fo.l_ (kHz)
Vout, THD - Vin
Vcc=9V,f=1kHz
HPF : 200 Hz, LPF : 20 kHz
AGC ON, SURROUND OFF
OdB = 0.775 Vrms
Measure with IR Detector Circuit
-40 -30
-20 -10 0
INPUT VOLTAGE LEVEL Vin (dB)
Vout - f
VCC = 9 V
Vin = 24.5 mVrms(-30 dBm)
AGC ON, SURROUND OFF
Measure with IR Detector
circuit
1k 10k 50
FREQUENCY f (Hz)
fo-L - Ta
VCC = 9 V
AGC ON
SURROUND OFF
25 50 75
AMBIENT TEMPERATURE Ta (°C)
TOTAL HARMONIC DISTORTION THD
AUDIO SIGNAL OUTPUT LEVEL
AUDIO SIGNAL OUTPUT LEVEL Vout (d8)
Vco FREQUENCY fo.R (kHz)
10 Vcc--9V,f--lkHz
HPF : 200Hz, LPF : 20 kHz
0 AGC ON, SURROUND OFF
TA2061AF
Vout, THD - Vin
0 dB = 0.775 vrms
Measure with IR Detector Circuit
-40 -30
-20 -10 0
INPUT VOLTAGE LEVEL Vin (dB)
Vout - f
VCC = 9V
Vin = 24.5 mVrms(- 30 dBm)
AGC ON, SURROUND OFF
Measure with IR Detector
circuit
1k 10k 50
FREQUENCY f (Hz)
fo-R - Ta
VCC = 9V
AGC ON
SURROUND OFF
25 50 75
AMBIENT TEMPERATURE Ta (°C)
2000-02-08 6/9
TOSHIBA
(mVrms)
RF OUTPUT LEVEL vo_L, v0_R
VO-L, Vo-R - Ta
TA2061AF
Ms-L. Ms-R - Ta
VCC = 9 V E?.
AGC ON T
SURROUND OFF '
"ss co
""sss E
"ss, E "s,.
'sfl R-ch
5 VCC = 9v, HPF : 200 kHz
t f= 1 KHZ, LPF : 20 kHz
g Vin = 245 mV, AGC ON
g SURROUND OFF
-25 0 25 50 75 -25 o 25 50 75
AMBIENT TEMPERATURE Ta CC) AMBIENT TEMPERATURE Ta (°C)
2000-02-08 7/9
TOSHIBA
APPLICATION CIRCUIT
TA2061AF
AGC Vref .
ON/OFF Vco Adjustment
sw cl ON/OFF sw
u. + u. + a g L-ch
L-ch 0.22 trF J: ON .3 " E 2 OUT 2.3 MH
IN Cl - + A AGC T/C lcf (R) :3
Q9 Q? 45 'f 'Cr' "St' if); 9
Vref Det.
AGC emphasis VCO - BUFFER
i) -f 1-Lout--L+kt-R) I
-- Rout = R - K-(L - R)
AGC emphasis VCO - BUFFER
Det. SN.
MIX AMP
AUTO3 OFF T/C GND
(P, f?, fa
0 22 F + LL + LL + u, (L)
R-ch [1 Q, u, u, C}
IN ' + I L: I m I ',2 g OFF
SURROUND
ON/OFF sw
Tr : 2SC2883
LED : TLN225
2000-02-08 8/9
TOSHIBA TA2061AF
PACKAGE DIMENSIONS
SSOP16-P-225-1.00A Unit : mm
16 L.,
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cu rn. N c:
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co W. m cu
v Ct SY..
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0.6TYP >4H l 4d:thl C 02@
H, 8.7MAX y
" 8.2i0.2 r.,' m
[ $5. ii' 17
ut" m ".
1gggrgggggil. _,..ia'i...(..,d,1"i] o !
'18“ ir-
5,5' = :0.525102
Weight : 0.14g (Typ.)
2000-02-08 9/9
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