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TA7795F-TA7795FN
DUAL PREAMPLIFIER FOR AUTO-REVERSE SYSTEM (1.5V USE)
TOSHIBA TA7795F/FN
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA7795F, TA7795FN
DUAL PREAMPLIFIERS FOR AUTO-REVERSE SYSTEM (1.5V USE)
The TA7795F, TA7795FN are Dual preamplifiers ICs, which TA7795F
are designed for low voltage operation (1.5V, 3V).
They are especially suitable for a stereo headphone
cassette player and for that of auto-reverse type.
FEATURES
o Switchover between F/R directional mode is possible
with only one-make switch.
0 Built-in M/N equalizer drivers, switchover between M/N SSOP16-P-225-1.00A
equalizer mode is possible with only one-make switch. TA7795FN
Those drivers are applicable to LED driver for F/R
display, too NLEDL' 2.5V).
It Low noise (Equivalent input noise).
Vni =1.3pVrms (Typ.)
(vcc=1.5v, Rg=2.2k0, BPF=20--20kHz)
0 Low supply current.
ICC =1.6mA (Typ.) (VCC = 1.5V, Ta = 25°C)
SSOP16-P-225-th65B
9 Operating supply voltage range. Weight
1/cc(opr)=ih9--151/ (Ta=25°C) SSOP16-P-225-1.00A : 0.14g (Typ.)
SSOP16-P-225-0.6SB : 0.099 (Typ.)
(Note 1) F/R : Direction (FORWARD/REVERSE)
(Note 2) M/N : Equalizer (METAL/NORMAL)
BLOCK DIAGRAM
: Reference voltage
I F/R,LED,M/N : Channel A preamplifier
CONTROLLER : Channel B preamplifier
1 2001-06-25
TOSHIBA
TA7795F/FN
PIN FUNCTION
Terminal voltage : Typical terminal voltage at no signal with test circuit (VCC= 1.5V, Ta=25°C)
PIN TERMINAL
No PIN NAME CONTENTS EQUIVALENT "JY"
1 Vcc - - 1.5
2 lNA-F Input for Forward mode 1
Input impedance 6 J 1.1
5 INB-F Rin =100k0 (Typ.) (5) (10) (6)
3 INA-R Input for Reverse mode Qt 1: VCC
Input impedance 1.1
6 INB-R Rin =100kQ (Typ.)
IO NFBA
NFB 1.1
16 NFBB
--i7r/cc
4 VREF Reference voltage 1: 1.1
Smoothing
7 TC Reducing pop noise, at 0.7
switchover between F/R mode.
Switch for F/E mode
8 FIR Off: Forward mode 0.7
On : Reverse mode
Switch for M/N LED
To Vcc : LED mode
9 / Open : Normal mode
To GND : Metal mode
11 OUTB Q (69)
Output 0.75
15 OUTA
CH-B-Metal Driver
12 DRVB (LED driver for Reverse mode) (.)
CH-ANetal Driver i i
14 DRVA (LED driver for Forward mode)
13 GND - - o
2 2001-06-25
TOSHIBA TA7795F/FN
APPLICATION NOTE
l. Function of built-in driver (Equalizer SW/LED driver)
The built-in driver is set to the mode shown in the table below by the voltage applied to Pin©
and (B).
FUNCTION PINS PIN. Q1 (PIN(D) Q2 (PlNO)
Equalizer Normal OPEN - OFF OFF
Switchover Metal GND - ON ON
. FWD OPEN ON OFF
LED Driver REV VCC GND OFF ON
Fig.1 Equalizer switchover Fig.2 LED driver function
function
2. Smoothing function
The Pino) is the smoothing terminal for reducing the pop
noise produced at F/R switchover by using the external
capacitor CT. (Fig.3)
Fig.3 Smoothing function
3. NFB terminal
The resistance of 18kQ is advisable to be connected VCC=15V
between NFB terminal (Pin© and Ct) and VREF for using
this IC. That is because NFB terminal is designed to have
the off-set voltage (AV=36mV) against each terminal (Pin sy-
C), a), (3 and S)). Therefore, the DC potential of the AV=36mV (0.7m
output terminals (pin(D and GD) can be set at about iiih itln 11i,il1''
VCC/2 with the current produced by this off-set 'a- 'N _
47/1F 2200 th022PF
potential. (Fig.4)
Fig.4 NFB terminal
3 2001-06-25
TOSHIBA
TA7795F/FN
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Supply Voltage VCC 5 V
LED Supply Voltage VL 6 V
LED Driver Current IL 5 mA
. . . TA7795F 350
Power Dissipation TA7795FN PD (Note) 400 mW
Operating Temperature Top, -25--75 "C
Storage Temperature Tstg - 55--150 ''C
(Note) Derated above Ta=25°C in the proportion of 2.8mW/°C for TA7795F, and of
3.2mW/°C for TA7795FN.
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, (Ta =25°C, Vcc= 1.5V, Rg =2.2kQ, f=1kHz, Normal EQ)
SYM- TEST
CHARACTERISTIC CIR- TEST CONDITION MIN. TYP. MAX. UNIT
BOL CUIT
Supply Current ICC 1 Vin = 0 - 1.6 2.5 mA
Reference Voltage VREF 2 1.0 1.1 1.2 V
Open Loop Voltage Gain GVO 2 Vin =32PVrms 60 66 - dB
Closed Loop Voltage Gain Gut:: 2 Vin =320pVrms - 31 - dB
Maximum Output Voltage Vom 2 THD=0.5% 270 350 - mVrms
Total Harmonic Distortion THD 2 Vo=100mVrms - 0.03 0.1 %
. . R =2.2kQ BPF=20Hz--20kHz
E I . g , - . .
qunva ent Input Noise Voltage 1/ni 2 NAB (GV=31dB, f=1kHz) 1 3 3 0 PN/rms
Ripple Rejection Ratio RR 2 Vr=32mVrms, fr=1kHz - 48 - dB
Cross Talk (CH-A/CH-B) CT1 2 Vo =100mvrms - 67 - dB
Cross Talk (F / R) CT2 2 Vo =100mvrms - 70 - dB
Saturation Voltage Of LED Driver Von 1 IL=3mA, LED Mode - 80 - mV
On-Resistance Of Metal Driver Ron 1 lL=100PA, Metal Mode - 100 - n
TEST CIRCUIT 1
4 2001-06-25
TOSHIBA
TEST CIRCUIT 2
TA7795F/FN
10,11: , A
+ - OUTB
l (l) + Q,
Ci , t
. (g 0.022/1F 0.022/zF (it.
i . F I- -, '5" ct rvcc
SW1 1: 2 SW1
A um um N LEO
kg :3 '" '"" rt/ ttk, a DNORMAL
_ 1 1 _ METAL
6.8 80 3.9kQ 3.9kQ 80 6.8
LL I “' W" l LL
(iir, 15 14 13 12 11 10 9
Nl.y/ Wry N'd.Y NUY \J V V.'.:? V
NFBA OUTA DRVA GND DRVB OUTB NFBB M/N
T A 7 7 9 5 F / F N
VCC INA-F INA-R VREF PIB-F lhlB-R TC FIR
(T) f?, fih, Gh, fish, re ffl 49
VV Nd..' "l" VV VV VV
. . Cl + t
fi fi -r,", S, , e F R
N. N. . "f
N N N N
RR VCC SG IN u. I
6009 El SW1 : OPEN-GVC SHORT-GVO
SW2 : RR-RR Vcc-OTHERS
v VREF
cc LL +
t + 3 A:
5 2001-06-25
TOSHIBA
CHARACTERISTICS CURVES
TA7795F/FN
Unless otherwise specified, VCC= 1.5V, Ta =25°C, f=1kHz, Normal Mode
VREF, vo (DC), Vom - Vcc
Vom : THD = 0.5%
DV VOLTAGE 0F OUTPUT V0(DC)
REFERENCE VOLTAGE
SUPPLY VOLTAGE Vcc (v)
THD - Vo
f=10kHz
TOTAL HARMONIC DISTORTION THD
10 30 50 100 300 500
OUTPUT VOLTAGE Vo
(mVrms)
Vin --32purms
OPEN LOOP VOLTAGE GAIN GVQ (dB)
30 100 300 1k 3k 10k
FREQUENCY f (Hz)
(mVrms)
MAXIMUM OUTPUT VOLTAGE Vom
SUPPLY CURRENT
TOTAL HARMONIC DISTORTION THD
CLOSED LOOP VOLTAGE GAIN GV (dB)
EQUIVALENT INPUT
NOISE VOLTAGE
ICC, Vni, RR - VCC
(#Vrms)
ICC .' Vin=0
Vni : NAB=1kHz
RR :Vr=32mVrms
fr=1kHz
SUPPLY VOLTAGE Vcc (V)
THD - Vo
Vcc-- 1.0V 1.5
10 30 50 100 300 500
OUTPUT VOLTAGE Vo (mvrms)
Vin = 32purms
NORMAL MODE
METAL MODE
30 100 300 1k 3k 10k
FREQUENCY f (Hz)
RIPPLE REJECTION RATIO RR (dB)
TOSHIBA TA7795F/FN
CT1 - f CT2 - f
0 f=1kHz 0 f=1kHz
:t). Vo=100mVrms Vo=100mVrms
5 - -20
g - n: -40
3: iii.
v CHB-9CHA a'
tf, - -60
t, CHA-YCHB 8
tl - w -80
00 30 100 300 1k 3k 10k 30k 00 30 100 300 1k 3k 10k 30k
FREQUENCY f (Hz) FREQUENCY f (Hz)
RR - f Vom - RL
"i's' 500
A Vr=32mVrms ' f=1kHz
£3 g. THD=0.5%
g 'f-,
30 100 300 1k 3k 10k 30k 1k 3k 10k 30k 100k 300k
FREQUENCY f (Hz) LOAD RESISTANCE RL (fl)
ICC, Vom, VREF - Ta
2. "it,
E 2. V
ICC , Vin =0
Vom 2 THD=0.5%
REFERENCE VOLTAGE VREF (v)
SUPPLY CURRENT
MAXIMUM OUTPUT VOLTAGE Vom
- 40 - 20 0 20 40 60 80
AMBIENT TEMPERATURE Ta CC)
7 2001-06-25
TOSHIBA TA7795F/FN
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.)
8 2001-06-25
TOSHIBA TA7795F/FN
PACKAGE DIMENSIONS
SSOP16-P-225-0.6SB Unit : mm
jillWlppl, " I IT
cu co, N Ir.-?
lil it. '2 a
C) " co tl.
I I I "
H H EH w IL
0.23TYP =1 _ 0.22_o.1 c, o.13®
Weight : 0.09g (Typ.)
9 2001-06-25
TOSHIBA TA7795F/FN
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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