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LA3160-E中文资料

Monolithic Linear IC

Ordering number:ENN494F

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE T okyo Bldg., 1-10, 1 Chome, Ueno, T aito-ku, TOKYO, 110-8534 JAPAN

Package Dimensions

unit:mm

Features

? Two preamplifiers on chip. ? Fewer peripheral parts. ? Low noise.

? 8-pin SIP package facilitating easy mounting.

?C ?C

Recommended Operating Conditions at Ta = 25?C

Specifications

Absolute Maximum Ratings at Ta = 25?C

e t e m a r a P l o b m y S s

n o i t i d n o C s

g n i t a R t i n U e g a t l o V y l p p u S m u m i x a M V C C x a m 81V n o i t a p i s s i D r e w o P e l b a w o l l A x a m d P 0

02W m e r u t a r e p m e T g n i t a r e p O r p o T 57+o t 02–e

r u t a r e p m e T e g a r o t S g

t s T 5

21+o t 04–r

e t e m a r a P l o b m y S s

n o i t i d n o C s

g n i t a R t i n U e g a t l o V y l p p u S V C C 9V e

c n a t s i s e R

d a o L R L

01?

Operating Conditions at Ta = 25?C, V CC =9V, R L =10k ?, Rg=600?, f=1kHz, NAB

e t e m a r a P l o b m y S s

n o i t i d n o C s

g n i t a R t i n U n

i m p

y t x

a m n o i t a p i s s i D t n e r r u C I C C 46

A m n i a G e g a t l o V G V p

o o l d e s o l C 53B d V ,p o o l n e p O O V 77.0=6708B d e

g a t l o V t u p t u O V O %1=D H T 1

.18.1V n o i t r o t s i D c i n o m r a H l a t o T D H T V O V

5.0=1.03.0%e

c n a t s i s e R t u p n I r i k 07k 001?e g a t l o V e s i o N t u p n I t n e l a v i u q E V I N k 2.2=g R ?

52.10.2V μk

l a t s s o r C T

C 0

5–5

6–B

Test Circuit1 : V O, VG, THD, I CC, r i Test Circuit3 : Noise

Sample Application Circuit 1 : Preamplifier for Car Stereo

Function of External Parts

C2, C4 are input coupling capacitors. In NAB equalizer amplifier, the gain at low frequencies is high and 1/f noise inside the IC is emphasized as output noise. Therefore, if the reactance of capacitor at low frequencies is increased, the dependence of 1/f noise on the signal source resistance causes the output noise voltage to deteriorate, and the value of reactance must be made small enough as compared with the signal source resistance. C2, C4 also influence the operation start time and the adequate value of these capacitors is 10μF. (Since C2, C4 of less than 4.7μF make the operation start time longer, use C2, C4 of 4.7μF or more).

C5, C11 are NF capacitors. The lower cut-off frequency depends on the value of these capacitors.

If the lower cut-off frequency is taken as f L :

C5 (C11) = 1/2π · f L · R2 (R7)

If the value of this capacitor is made larger, the operation start time of amplifier is more delayed. The adequate value of capacitor is 47μF.

The frequency characteristic of the equalizer amplifier depends on C6 and R4, R3 (C10 and R5, R6).

The time constants to obtain the standard NAB characteristic are as shown below.

T ape speed

C8 is bias capacitor for the power line. C8 of 47μF is inserted at a point as close to the power supply pin (pin 4) as possible.

C1, C3 are for preventing radio interference in the strong electric field, interference attributable to engine noise, and blocking oscillation at the time of large amplitude operation. The adequate value of C1, C3 is approximately 1000pF. C7, C9 are output coupling capacitors. The adequate value of C7, C9 is 10μF

(b) Tape speed : 4.75cm/s for a cassett

1/R1+j ωC1

= + R2

= (R1+R2) { }

1+j ωC1 {R1R2/ (R1+R2)}

1+j ωC1R1

G V 035304B d R F

N 0

810

016

G V 035304B d R F

N 0

440

420

31?

G V 035304B d R F

N k

2.3k

8.1k

1k ?

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LA3160