TA7688F ,STEREO HEADPHONE AMPLIFIER (3V USE)TA7688FTA7ERRFSTEREO HEADPHONE AMPLIFIER (3V USE)The TA7688F is a stereo headphone power amplifier ..
TA7698AP ,VIDEO-CHROMA-DEFLECTION SYSTEM FOR A COLOR TELEVISIONTOSHIBAINTEGRATED CIRCUITTA7698APTECHNICAL DATA TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT“1A12(1)TE ..
TA76L431FB ,Adjustable precision Shunt regulatorElectrical Characteristics (Unless otherwise specified, Tj = 25°C, IK = 10 mA) Characteristics Symb ..
TA76L431FB ,Adjustable precision Shunt regulatorAbsolute Maximum Ratings (Ta 25°C) Characteristics Symbol Rating Unit Cathode voltage V 20 V KACat ..
TA76L431FT ,Adjustable precision Shunt regulatorFeatures SON5-P-0202-0.65C • Precision reference voltage : V = 2.49V ± 1.0% (Ta = 25ºC) REF TA76 ..
TA76L431S ,Adjustable precision Shunt regulatorBlock Diagram Circuit Symbol Cathode (K) Cathode (K) Reference (REF) Reference (REF) 2.49V A ..
TC551402J-22 ,4,194,304 WORD BY 1-BIT/1,048,576 WORD BY 4 BIT CMOS STATIC RAMTOSHIBA TC551402J-22,-254,194,304-WORD BY 1-BlT/1,048,576-WORD BY 4-BIT CMOS STATIC RAMThe TC551402 ..
TC551402J-25 ,4,194,304 WORD BY 1-BIT/1,048,576 WORD BY 4 BIT CMOS STATIC RAMTOSHIBA TC551402J-22,-254,194,304-WORD BY 1-BlT/1,048,576-WORD BY 4-BIT CMOS STATIC RAMThe TC551402 ..
TC551664AJ-15 ,65,536-WORD BY 16-BIT CMOS STATIC RAMTOSHIBA TC551664AJ-15,-2065,536-WORD BY 16-BIT CMOS STATIC RAMThe TC551664AJ is a 1,048,576-bit hig ..
TC551664AJ-20 ,65,536-WORD BY 16-BIT CMOS STATIC RAMapplications where high-speed access and high-speed storage are required. All inputs and outputs ar ..
TC551664BFT-15 ,65,536-WORD BY 16-BIT CMOS STATIC RAMTOSHIBA TC551664BJ/BFT-12,-1565,536-WORD BY 16-BIT CMOS STATIC RAMThe TC551664BJ/BFT is a 1,048,576 ..
TC551664BFT-15 ,65,536-WORD BY 16-BIT CMOS STATIC RAMTOSHIBA TC551664BJ/BFT-12,-1565,536-WORD BY 16-BIT CMOS STATIC RAMThe TC551664BJ/BFT is a 1,048,576 ..
TA7688F
STEREO HEADPHONE AMPLIFIER (3V USE)
TOSHIBA TA7688F
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA7688F
STEREO HEADPHONE AMPLIFIER (3V USE)
The TA7688F is a stereo headphone power amplifier IC
designed for portable cassette player applications.
FEATURES
0 Small installed area and few external parts
0 Low supply current : ICCQ=7mA (Typ.) at 3V
o Built-in a ripple filter
0 Built-in a power amplifier mute
SSOP16-P-225-1.00A
Weight : 0.14g (Typ.)
o Built-in a power off circuit
0 Operating supply voltage range : VCC(opr) =1.8--5V
It Recommended supply voltage : VCC=3V
o The standard model is TA7688F (SO)
BLOCK DIAGRAM
INPUT1 + l
VRF 1OUT1 f", VCC
RIPPLE
FILTER
INPUT2
Dotted Line is an additional circuit to boost the stabilized current. (Option)
1 2001-06-25
TOSHIBA TA7688F
APPLICATION NOTE
Voltage gain adjustment
The closed loop Voltage gain GV is determined
by the ratio of R1 and R2 shown in Fig.1.
GV = 208og R2
But the actual value is 30.5dB because of
influence of the other circuit.
Fig.2 showes the application circuit of higher or Fig.1
lower gain than recommended one.
(1) GV<30dB (2) GV>30dB
AMP 7/10 AMP 7/10
2/15 2/15
w us? w.
23/14‘ i'):
RNF RNF
In the case of GV<30dB, it happens to oscillate by phase delay at high frequency.
So this IC is not available at GV<30dB. In the case of GV>30dB, input offset is amplified, so that
output DC voltage differs from center voltage. The unsymmetrical clipping wave is prevented by
inserting capacitor CNF.
Therefore this IC is available at GV>30dB by using CNF.
It is recommended to check pop noise based on CNF.
2 2001-06-25
TOSHIBA TA7688F
2. Muting
Muting operates when the voltage is applied to pin 5 or the current
is flowed into pin 5. CONTROL
Supply current is about half at muting ON. 2'an Tr
It is necessary that muting drive current IMUTE is less than 150PA.
. Oscillation precaution
(1)Oscillation preventing capacitor between output pin and GND is
recommended to use capacitor with less temperature drift. Fig.3
So suitable capacitor is not celamic or electrolytic capacitor, but
tantalum or polyester film capacitor.
When protector resistor 3.90 is rejected, output power increases.
In this case, it is necessary to insert 3.90 as shown in Fig.4.
When RL=0, output current is very large in the circuit.
(2) It is necessary to use tantalum capacitor at Pin 11 (2ng).
(3) Decoupling capacitor C10 is necessary to be near the pin 9. Fig.4
. Radiation precaution
Because of wide band (about 200kHz), the radiation from the
amplifier degrade S/N at radio. As shown in Fig.5, it
recommended to limit the band by C and R.
In this case, phase compensation check is necessary.
When C=100pF, R=15kQ, fHC is 30--50kHz.
AMP (r?
"tCY R
MAXIMUM RATINGS (Ta =25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Supply Voltage VCC 7 V
Output Current lo 160/ch mA
Filter Output Current IR 10 mA
Power Dissipation (Note) PD 350 mW
Operating Temperature Topr - 25~75 "C
Storage Temperature Tstg - 55--150 "C
Note : Derated above Ta=25°C in the proportion of 2.8mW/°C.
3 2001-06-25
TOSHIBA
TA7688F
ELECTRICAL CHARACTERISTICS
1. AC characteristics (Unless otherwise specified, Ta =25°C, VCC = 3V, Rg =6000, f=1kHz)
RH = 3.90, RL = 320
CHARACTERISTIC SYMBOL LEE TEST CONDITION MIN. TYP. MAX. UNIT
. I V; =0 - 7 12 mA
Quiescent Current (fd] 2 - V:: =0, SW2 : OFF - 1 10 pA
Pom THD=10% 20 27 -
Output Power Po (2) - RL =160, THD = 10% - 38 - mW
Total Harmonic Distortion THD - Po=10mW/ch - 0.12 1.0 %
Closed Loop Voltage Gain GV - Vin = -42dBV 28.5 30.5 32.5 dB
Channel Balance AGV - Vin = -42dBV - 0 :1 dB
Cross Talk CT - Vo = - 2dBV, ch1-ch2 45 65 - dB
Ripple Headphone AMP RR (1) - fr=1kHz, Vr= -22dBV 30 45 - dB
Rejection Ripple Filter RR (2) - fr=100Hz, Vr= -22dBV - 40 - dB
Output Noise Voltage Vno - BPF=20Hz--20kHz - 0.06 0.2 mVrms
Input Resistance RIN - f=1kHz 15 20 25 k0
VRF (1) Vcc=2V, IRF=10mA 1.45 1.6 -
Ripple Filter Output Voltage VRF (2) - IRF =10mA 2.1 2.3 2.5 V
VRF (3) Vcc=4.5V, lRF=10mA - 3.4 -
Muting Attenuation ATT - VM UTE = 3V (OdB = 240mVrms) 60 80 - dB
Muting Input Voltage VMUTE - ATT; 50dB (OdB = 240mVrmS) - 0.7 1.0 V
Muting Input Current IMUTE - ATT; 50dB (OdB = 240mVrms) - 35 - pA
Ripple Filter Current IB - - - 0.05 - mA
2. DC characteristics
(Ta=25°C, Vcc=3V, Terminal voltage at no signal)
ITEM SYMBOL RATING UNIT
Terminal 1 (1N2) V1 1.5 V
2 (NF2) v2 1.5 v
3 (V32) V3 1.5 V
4 (BYPASS2) va 1.5 v
5 (MUTE) V5 0 V
6 (BYPASS1) V6 2.2 V
7 (OUT2) v7 1.5 v
8 (GND) v3 0 v
9 (Vcc) V9 3.0 V
10 (OUT1) V10 1.5 V
11 (VRF) V11 2.3 V
12 (BASE) v12 2.2 v
13 (PW ON/OFF) V13 3.0 V
14 (V31) V14 1.5 V
15 (NF1) v15 1.5 v
16 (lbl1) V16 1.5 V
4 2001-06-25
TOSHIBA TA7688F
TEST CIRCUIT
m E, m
cam ct g
IN o-o ' 1F m
2 SW4 /t t, T
Note : RH : Protection resistance
C6 & C7 : Tantalum capacitor or polyester film capacitor
C5 : Tantalum capacitor
Icco. VRF, V7 & V10 - Vcc 57S" GV - Vcc
R =32Q _
"i'" L ICCQ(Mute OFF) 2
V 9? a
- m g 5
E ICCQ (Mute ON) In > ii-i-
c: 0 _ 0
D > CD
u _) f: 8
- 4 D <
2 Ed 0 F-
LLI E a _l
'ii E m 9 RL = 320
- V _ S
8 RF F: Vin-- -42dBV
(IRF =10mA) i? 5
_ a f=1kHz
1 2 3 4 5 6 1 2 3 4 5 6
SUPPLY VOLTAGE Vcc (v) SUPPLY VOLTAGE Vcc (v)
Icco. VRF, V7 & V10 - Ta SCS" Po, GV - Ta
Vcc=3V o
a RL=3ZQ :5
E 93 E
Sr Lu V E?
2 © o '0
Lu 5 a, V
- o -u
a < o m >
Lu l-, > Lu 0
g 0 F- E
D > CD E E
U a" sa: - g
H 2 D 3
E - C) l LU
Q E m F- 0
m n: Lu D <
Lu W _ O -
5 _ = tt
cr 'st >
-40 -20 0 20 40 60 -40 -20 0 20 40 60
AMBIENT TEMPERATURE Ta (°C) AMBIENT TEMPERATURE Ta (°C)
5 2001-06-25
TOSHIBA
TOTAL HARMONIC DISTORTION
THD (%)
TA7688F
THD - Po THD - Po
RL=320 Vcc=3V
Gv=30.5dB a RL=16S2
1:100. 1k, 10kHz Fr.) Gv=30.5dB
g f=100,1k,10kHz
‘0.3 1 3 30 100 '03 1 3 10 30 100
OUTPUT POWER Po (mW) OUTPUT POWER Po (mW)
A THD - f
El- RL--16Q
SE: 0.
SE RL=32Q
0 100 300 1k 3k 10k 30k
FREQUENCY f (Hz)
GV - f
55 Vcc=3V
el RL--32Q
> Vin=-42dBV
30 100 300 1k 3k 10k 30k 100k
FREQUENCY f (Hz)
CT - f
:tll. - Vcc=3V
RL--32n
u CHI-KH2 Vo=240mvrms
S CH2-ACHI
bl' 1 I I
'ii,) - CH1-lH2,CH2-rCHI
30 100 300 1k 3k 10k 30k 100k
FREQUENCY f (Hz)
6 2001-06-25
TOSHIBA TA7688F
RR - f
"ii.').'. HEADPHONE AMP.
a l l l _
Iii': - RIPPLE FILTER
E (IRF=10mA)
- 30 100 300 1k 3k 10k 30k 100k
FREQUENCY f (Hz)
w 'a v =3V
F,',,, E cc
go; GV=30.5dB
F-f-te...
0 100 300 1k 3k 10k 30k 100k
SIGNAL SOURCE RESISTANCE R9 (Q)
APPLICATION CIRCUIT
2SA1015GR Power SW
U. S C
+=;C OUT1
C? Li 220M
o: M M
etcr?,
:1 A m
+= - A
{:1 t 220% OUT2
I cl Mute 47142 N.
g) .2 SW 0
C7, C7 : Tantalum capacitor t
7 2001-06-25
TOSHIBA TA7688F
EXTERNAL PARTS TABLE (Mention only CH1)
PARTS INFLUENCE
No. TYPICAL PURPOSE SMALLER THAN TYP. GREATER THAN TYP. NOTE
. Bad low frequency " " . . .
C1 IPF Coupling response Pop nOIse IS high. Input
1 Noise receiving
C2 1000pF LPF fCH - 27rC2(R1//Zin) protection
R -3dB (30kHz) at R1= 5.6kQ Equivalent signal
1 -3dB (20kHz) at R1=12k0 source impedance
ili I .
Decoupling for Stem ity(OSC) t IS better to Use tantalum
C3 22pF V decreases, Vno at connect to ca acitor
RF VRF increases input side GND p
Not available at GV<30dB
RNF - GV Adjustment If necessary devide at input level by -
resistors
f-response . .
R2 (15km control, THD -3dit p.0m.t IS pkyz. . Low OSC margine at
. Check ringing at clip by OSC margine
C (180pF) Imperovement at down GV<4OdB
4 high freq. .
C 22 F Bypass capacitor THD and Vno It is better to connect
5 ’a for bias Degradation to input side GND.
C 22 F Bypass capacitor Ripple rejection It is better to connect
6 ’a for ripple filter ratio degradation to output side GND.
Pull down . . . .
R3 47kn resistor at mute ICC Increases at Pull down effect Additional resistor at
pin mute ON down long pattern only
IMUTE increases
R4 47kQ IMUTE limiter (Unnecessary at IMUTE decreases 'MUTE<150#A
Vcc=3V)
5:32:22?! 31:28:?“ Output decreases.
RH 3.90 . . . Phase compensation CR filter with C7
Phase Phase compensation is out
compensation is out. .
Phase THD degradation Recommended to use
C7 0.22PF . Oscillation by load capaci- tantalum or film
compensation .
tance capacitor
. Bad low frequency " " . . .
C8 220pF Coupling response Pop nalse IS high. Output
. Oscillation margin Necessary to be near
Cg 100PF VCC decoupling decreases - pin 9
To be added at
Tr 2SA1015GR Booster for VRF - - IRF>10mA
TOSHIBA
TA7688F
1. f-Resp(Mention Only CH1)
RESPONSE Resp
RESPONSE Resp
Vcc=3V
2 Po=10mW(=0dB)
0 3pm,; Gv=30-5dB RL=32k9
M” wet wer'"''" 'i'"'"sc, ts,.,,
-2 / / _ C8=220PF \ co Lt
/ / / N N l l
/ f f C8--100pF I I
-4 I l I I I © -
I / CD R1=0, c =1000pF NN
/ g R1=S.1k%l, C2=1000pF th
-6 / [tll/c-I/trt-Crete/I--"'--""'"'" INt
R1=12k ,C2=1000pF I ,
-8/ .y.f 1. Unless otherwise specified, R2 and C4 are no - oyss-,
connection. -
- 10 I 2. GV(TOTAL) changes as follows at R1>0 f4) y
/ R1: 5.1kP-rGv (TOTAL) '=.28dB l
I R2 =12kQ-rGv(rorAL)'=.26dis
10 30 100 300 1k 3k 10k 30k 100k
FREQUENCY f (Hz)
Vcc=3V
2 Po=10mW(=0dB)
*C8=470/IF Gv=40dB (RNF=3900) RL=32kQ
0 w"''"-"-':'"----''-"")'" l "',?s, "1:ls,
-2 / _ C8--220PF 'ss \
/ / z "s "N N I l
I r C8--100pF "N I .
_4,LI / I I I © -
/ co R1=0, C2=1000pF N
-6 / © R1=5_1kQ, C2=1000pF IN
/ © R2=15kn, C4=180pF, R1=0, 'ts
-8 / C2=1000pF - © Is-,
f (4) R1=1ZkQ,C2=1000pF -(iri)t (
- 10 / X The other conditions are same as the -
l graph of GV=30.5dB.
10 30 100 300 1k 3k 10k 30k 100k
FREQUENCY f (Hz)
TOSHIBA
2. Po-THD(Correspond to 1.f-Resp)
TOTAL HARMONIC DISTORTION THD
RIPPLE FILTER OUTPUT VOLTAGE VRF
Vcc=3V
GV=30.5dB
RL--32n
IRF-VRF
f=10kHz
=100,1kHz
f=10kHz, R2=15kQ
C4=180pF
.3 1 3 10 30
OUTPUT POWER Po (mW)
Vcc--6V WITH Tr Gv=30.5dB
( ---- ---"'f=1kHz
IRF (Max)
r-s-lil/Mist', Trl Po=10mW
( ---'""N-------' RL=32S2
--"""-".--"-"""-''-
l __"{'__-_"__
l _'\--"____"__
C" - -
_1-8 sl IRF (Max) is determined by IB at
filter, hFE of external Tr. and
required supply current
capacity.
10 20 30 40 50 60
RIPPLE FILTER OUTPUT CURRENT Ir (mA)
TOTAL HARMONIC DISTORTION THD
TA7688F
f=10kHz
f=100,1kHz
f=10kHz, R2=15kn
C4=180pF
1 3 10 30
OUTPUT POWER Po (mW)
TOSHIBA TA7688F
PACKAGE DIMENSIONS
SSOP16-P-225-1.00A Unit : mm
16 9 -
H H H H H H H H ' n N
cu rn. N i:
fi?, 53: ts f,
co lft m cu
iii. 111 _,ii-",.i, bl bl H H______ lr, Ir.
0.6TYP ! l l 4d:0. 1 C, th2O)
v, 8.7MAX 's9,
" 3.2io.2 M g
CM "". .
[ a ii' 12
yeacassaail. ut" GI '1
1-". 1- C9 !
us" ir-
50' ' Jh525hh2
Weight : 0.14g (Typ.)
11 2001-06-25
TOSHIBA TA7688F
RESTRICTIONS ON PRODUCT USE
000707EBA
OTOSHIBA 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..
OThe 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.
0 The products described in this document are subject to the foreign exchange and foreign trade
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.
0 The information contained herein is subject to change without notice.
12 2001-06-25
:
www.loq.com
.
