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TA7765AF
AM/FM IF SYSTEM (1.5V USE)
TOSHIBA TA7765AF
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA7765AF
AM/FM IF SYSTEM (1.5V USE)
The TA7765AF is an AM/FM IF system IC designed for
low voltage operation (1.5V), which is especially suitable
for a stereo headphone radio and a radio cassette
recorder. This IC can realize the low power dissipation
and few external parts.
FEATURES
0 Including the AM/FM switch.
0 Including the single output terminal for AM/FM.
0 Including the LED driver for tuning indicator.
(VLED; 2.5V)
Few external parts and small installed area.
Excellent supply current : (VCC= 1.5V, Ta=25°C)
AM : lcc=1.1mA (Typ.)
FM : lcc=1.8mA (Typ.)
It Operating supply voltage range.
: VCC (opr) = 0.95~5V (Ta = 25°C)
SSOP16-P-225-1.00A
Weight : 0.14g (Typ.)
BLOCK DIAGRAM
FM MPX
FM FIE -- - VCO STOP
1:an El r w
AM IF AM IF
"r AM MIX AM MIX
0 w AM IN BYPASS OUT BYPASS IN AGC
16 SC :15, S I'' {E Ily :11, (iii) Iii)
"I''' ngé" - AM RF/MIX L
AM / FM - -
- sw FM LED DET "n. AM
i T "iii.::
Flt” LED QUAD
FM IF IN 1 ('"'2h, (ii) 5 NC VV
I T FM f GND T LED LED FM AM K AF VCC
0 1 IN BYPASS QUAD DET OUT
=, ' ll DET
T +3 - 0 OUT Vcc
1 2001-06-25
TOSHIBA TA7765AF
APPLICATION NOTE
(1) FM-IF input stage I Vcc
The terminal pin® is the FM-IF input terminal which
is the base of common-emitter transistor. (Fig.1) FM IF
(2) FM-IF stage 220
F-CY-il
This is composed of the six stage of the common- =1 Cg
emitter amplifiers with active loads. As the third T 2
stage and the fourth stage are connected with
internal coupling condenser, it is composed of HPF.
Therefore, it is possible to reduce the noise of low
frequency range.
(3) AM input stage “gllg Vcc
The terminal ping) is the AM input terminal which is
the base of common-emitter transistor.
And this transistor is the current source of the Mixer
which is composed of emitter coupled pair AM IN CE . AGC
transistors. (Fig.2) f,ii,l,ri.
(4) AM-IF input stage BarAntenna .9
The AM-IF signal from the MIX OUT terminal (pinO) '3:
is applied to the AM-IF input terminal (pinO)
through the transformer. Fig.2
The terminal pinO is the base of common-emitter
transistor, and the input resistance is 3kQ (Typ.).
(5) AGC circuit
This AGC circuit is composed of the internal Double-
AGC get high applied widely.
[medium input: AGC applied to f section.
strong input : AGC applied to RF and IF section.
2 2001-06-25
TOSHIBA TA7765AF
(6) Output buffer amplifier (AF)
The output impedance differs in FM/AM mode. At Vcc VLED
FM mode, it is low output impedance due to pass
the sub-carrier. On the other hand, at AM mode, it
is high output impedance due to high frequency-cut
easily.
ROUT(FM)=1.3kQ (Typ.)
ROUT(AM) = 8kf2 (Typ.)
(7) LED driver
Fig.4 shows the LED driver.
The "LED supply voltage" must be more than about
2.5V, for using this function.
Without the LED, it is necessary to connect the
terminal pin@ to GND, then the supply current is V' OVCC
reduced. j, AM L MPX i
15 VCO STOP 8 -
(8) FM/AM mode switch circuit "i" I
When the terminal pin(D is connected to VCC FM IF AMP I AM BIAS I I FM BIAS I
directly, the FM mode is given, and when this J
terminal is opened, the AM mode is given. l, 1
In case of connecting as Fig.5, one-circuit switch is
enough to stop the VCO at AM mode.
FM V"-cr VCC
TA7765AF STOP
AM/FM f vel,"? TA7766AF
3 2001-06-25
TOSHIBA TA7765AF
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Supply Voltage VCC 5 V
Lamp Voltage VLAMp 6 V
Lamp Current ILAMP 5 mA
Power Dissipation PD (Note) 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.
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, Ta =25°C, VCC= 1.5V
FM : f=10.7MHz, nf= i22.5kHz, fm=1kHz, Vin =90dB/1V EMF
AM : f=1MHz, MOD=30%, fm=1kHz, vin=60ngv EMF
CHARACTERISTIC SYMBOL 1211:1- TEST CONDITION MIN. TYP. MAX. UNIT
Supply Current Icc(1) - FM Vin =0 - 1.8 2.8 mA
ICC (2) AM Vin =0 - 1.1 1.8
Input Limiting Voltage Vin(iim) - -3dB Limiting point - 53 59 dB/A/ EMF
Recovered Output Voltage VOD - 28 48 60 mVrms
FM Signal To Noise Ratio S/N - - 62 - dB
Total Harmonic Distortion THD - - 0.5 - %
AM Rejection Ratio AMR - MOD=30% - 22 - dB
Lamp On Sensitivity VL - IL=1mA - 48 56 dB/A/ EMF
Gain GV - Vin=30dBpV EMF IO 32 50 mvrms
Recovered Output Voltage VOD - 30 48 75 mVrms
Signal To Noise Ratio S/N - - 4O - dB
AM Total Harmonic Distortion THD - - 1.6 - %
Lamp On Sensitivity VL - IL=1mA - 30 - dB/A/ EMF
Local OSC Stop Voltage Vstop - - - 0.95 V
Pine Output Resistance RO(FM) - f=1kHz - 1.3 - k0
RO(AM) - 8 -
4 2001-06-25
TOSHIBA TA7765AF
DC CHARACTERISTICS (VCC= 1.5V, Ta =25°C, terminal voltage at no signal)
PIN No. SYMBOL AM FM UNIT
PING) (FM IF IN) V1 - 0.7 V
PIN © (GND) Vit 0 o v
PINS (LED BYPASS) V3 - - V
PIN © (LED) v4 - - v
PINS) (FM QUAD DET) V5 1.5 1.5 V
PINS) (AM DET) V6 1.5 1.5 V
PIN © (AF OUT) V7 0.6 0.7 V
PIN (Vcc) v8 1.5 1.5 v
PIN © (AGC) V9 0.8 - V
PIN® (AM IF IN) v10 1.4 1.5 v
fntu(0 (AM IF BYPASS) V11 1.4 1.5 V
PIN© (AM MIX OUT) V12 1.5 1.5 V
PIN0 (AM MIX BYPASS) V13 0.7 - V
PIN® (AM IN) v14 0.7 - v
PIN© (SW) v15 - 1.5 v
PING (OSC) v16 1.5 1.5 v
5 2001-06-25
TOSHIBA
TEST CIRCUIT
TA7765AF
. T2 LL
r-- -', SFU4SSB .. J; +1
=- .. 8 I ‘3
I =, '
l "X" n ©
...... . 5.6m _ 0.022%
Kh r\ cs
Q1] \19 ld.)
BY2 IF IN AGC
FM IN GND LED BY LED
Cih, ' CP, fish,
2400 a 'Pd r.i,.ii' L F, AF OUT
' S, TE 3 C,".
D, SFE 10.7MA
In (MURATA) fi,
ILED VLED=3V
COIL DATA (Test circuit) © : SUMIDA ELECTRIC Co., Ltd.
COIL L co TURN WIRE
No. STAGE f (PH) (pF) 00 1-2 2-3 1-3 4-6 (mm¢) REF.
T1 FM DET 10.7MHz - 82 130 - - - 11 0.12UEW S 0133-3099-181
T2 AM IFT 455kHz - 180 110 88 60 - 8 0.07UEW S 48T-037-423
T3 AM DET 455kHz - 180 110 146 6 - 13 0.07UEW s 44M-037-935C
T4 AM OSC 796kHz 288 - 125 13 75 - - 0.08UEW s 0137-135-262
(Bottom view) T1 FM DET T2 AM IFT T3 AM DET T4 AM OSC
Vcc CF Vcc VC
Ci) Ci)
Pin© Pin® Pin® Pin© Vcc
TOSHIBA TA7765AF
VOD, AMR, S/N, THD - Vin ICC, VOD - VCC
Vcc=1/iV VOD ... f=10.7MHz
f=10.7MHz fm=1kHz
fm =1kHz Af-- t22.5kFiz dev.
FEES ;\3 a"
SSE'. N: i22.5kHz dev, - Vin=90dBpV EMF 3
ask? 2 A ICC .... Vin=0 0
"s < 0
W; J? F E, >
ug v B--4 v Gil ua
'i' OD (0d - 8m rms) g :3, Von (0dB=48mVrms) 'i'
t 8 l-,
O C) _ r- O
F > 9 a >
491- 0 'd r-
1}. D Q 1 D
mgn. - D CL
Y.) '- a U S
028 fl >- o
29 n: rd a
o5,2 - o < n- w
TYM MOD=30% I D n:
-tu,1 W Lu
gTy'/ii a' >
a 8 - 8
gay C) w
m
20 40 60 80 100 120 0.8 1 2 3 4 5
INPUT VOLTAGE Vin (dBprV EMF) SUPPLY VOLTAGE VCC (V)
Vin(lim), VOD, QS, ICC - Ta VL, THD - VCC
Vcc=1.5V Vin=90dB/1V EMF 1.2
tt t 80 f=10.7MHz f=10.7MHz
:: l'"'',': fm=1kHz A
gg trdf M: 1-22.5kHz dev. 'i'" fm=1kHz 1.0 it.
:5rgg.'ii (ef, Vin=0 nu Af= i22.5kHz dev. Ct
ii 70 VOD Vin=9OdB/1V EMF 'ji. if
th, 8 E .8 S
:irefst s' 60 s' '13::
o In (lim) A F tr,
C , fi. 'g .6 a
ii 5 50 VL E led
': it > U V’ a
S s - t sy E o
{g E 2 E VOD - g .4 E
0255 Q (S/N=30dB) z o g
a w 40 s w
_ V) O a n: a. _,
t - o b", I g E <
E 2 g 2 CC U S Q t
-, b' Lu 0 F F-
530 a. 30 o.
a 5 m E (:5
E CrrE: S us
-20 0 20 40 60 0 0.8 1 2 3 4 5 6
AMBIENT TEMPERATURE Ta (°C) SUPPLY VOLTAGE VCC (v)
7 2001-06-25
TOSHIBA TA7765AF
VOD, S/N, THD - Vin ICC, VOD - Vcc
2.0 -5
Vcc=1.5V l l l I
_i.i'i:'si.i).". f=1MHZ "iii'' VOD (0o=48mvrm.:l.-....------- [ii
f =1kHz
a th m Ct A 1.6 a
's o MOD=30% if < // -0 o
”’> VOD (0dB=48mVrms) g ICC >
Lu a f .....--- Lu
0 ".....-""
g E b' 1.2 f _.,..----- g
A C) w.,....--" ._a
SS IE, 's I,,/ --5 9
Se, CY g y -
' l.., n: D
urtL - D tl n-
95 (2) u 0.8 's
26 E F " v f=1MH o
a .4 OD .. 1
of?, 31: fr. I tD
5'ti, I R I fm=1kHz __10E
:15 La' 0.4 I MOD=30% il;
'S-yi,] g l Vin=60dpr EMF 'y,-,'
ICC 'PV Vin=0
0 'f, $3 --15
0 20 40 60 80 100 120 o 0.8 1 2 3 4 5
INPUT VOLTAGE Vin (dB/zV EMF) SUPPLY VOLTAGE VCC (V)
VOD, Qs, ICC - Ta VL, THD - Vcc
Vcc=1.5V
f=1MHz
fm =1kHz
MOD=30%
Vin{ ICC Vin=0
VOD Vin=60dB/1V EMF
Vin =60dBpV EMF
f=1MHZ
fm =1kHZ
MOD=30%
(dBpV EMF)
(dB/zV EMF)
ICC (mA)
LAMP 0N SENSITIVITY VL (dB/IV EMF)
TOTAL HARMONIC DISTORTION THD
RECOVERED OUTPUT VOLTAGE VOD (mVrms)
QUIESCENT SENSITIVITY
LAMP ON SENSITIVITY
QS (SIN = 20dB)
SUPPLY CURRENT
- 20 0 20 40 60 0 0.8 1 2 3 4 5 6
AMBIENT TEMPERATURE Ta (°C) SUPPLY VOLTAGE Vcc (V)
8 2001-06-25
TOSHIBA TA7765AF
PACKAGE DIMENSIONS
SSOP16-P-225-1.00A Unit : mm
16 9 -
H H H H H H H H ' n N
cu rn. N IE-?
fi?, 53: ts f,
co lft m cu
iii. T1 _,ii-",.i, bl bl H H______ lr, Ir.
0.6TYP ! l l 4d:0. 1 C, th2O)
v, .7MAX 's9,
" 3.2io.2 M g
CM "". .
[ a ii' 12
yeacassaail. ut" GI '1
1.C...y, T- O !
vgi." ir-
50' ' Jh525hh2
Weight : 0.14g (Typ.)
9 2001-06-25
TOSHIBA TA7765AF
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.
10 2001-06-25
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