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U4270B PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 U4270B
기능 FM IF limiter amplifier and detector
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U4270B 데이터시트, 핀배열, 회로
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TELEFUNKEN Semiconductors
FM IF limiter amplifier and detector
U 4270 B
Description
The U 4270 B is an integrated bipolar FM-IF amplifier
circuit with field strength indicator, stop signal generator,
multipath detector and controllable mute function. It is
designed for car radios and home receiver applications.
Features
D 7 stage limiter amplifier
D Multipath signal detector
D Stop signal generator with controllable threshold
Block Diagram
D Signal strength output
D Controllable mute function
D High signal/noise ratio and low signal distortion
1 14 (15)
9 (10)
18(20)
(19)
17
R3 Mute depth control
10 (11)
3 (4)
4 (5)
8 (9)
(8)
7
16 (18)
11 (12) 15 (16) 13 (14) 12 (13)
5 (6)
6
(7)
2
( ) SSO 20
94 8876
Rev. A1: 07.10.1994
Preliminary Information
1




U4270B pdf, 반도체, 판매, 대치품
U 4270 B
TELEFUNKEN Semiconductors
Parameters
Test Conditions / Pin
Symbol Min
Typ
Max Unit
AFC output
Output current
Input frequency offset
Reference voltage output
Pin 7
"deviation 50 kHz
IAFC = 0
Pin 8
" IAFC
" foff
90
2
110 140 m A
12 kHz
Output voltage
I8 = 0.5 mA
V8 3.9
4.2 V
Maximum load current
I8 3 5 mA
Multipath detection
Pin 12, 13, 15
Detector threshold
V12 < 1 V, fV15 = 20 kHz V15 5.4
Output leakage current
V12 = VS
I12 1.5
7 mV
mA
Charge current
Discharge current
Pin 15 connected to ground
vPin 15 open circuit
V13 1 V
I13
I13
3
–7
3.6 mA
– 10 m A
Mute function
Pin 2
Mute “off ” voltage
IF-Input signal
Limiting threshold
Vout – 2 dB
Vout – 3 dB
Pin 18
Voff
Vi
0.22
25
0.33 V
33 dBm V
"VS = 8.5 V, reference point Pin 1, fi = 10.7 MHz, adjusted at I7 = 0, Vi = 10 mV, FM-deviation 75 kHz, fmod = 1 kHz,
Q0 = 20, Tamb = – 40 to + 85 _ C, unless otherwise specified
Parameters
Test Conditions / Pin
Symbol Min
Typ
Max Unit
Supply voltage
Supply current
Field strength output
Pin 14
Pin 14
Pin 11
VS
IS
7.5
17
15 V
25 mA
Output voltage
Vi = 200 mV
Vi = 50 mV
Vi = 1 mV
Vi = 0 mV
VOUT
4.0
3.6
2.25
0.01
5.0 V
4.7
2.95
0.42
Audio output signal
Pin 4
Output voltage
Distortion
(S+N)/N ratio
"deviation 75 kHz
VAF
THD
S+N/N
250
0.48
70
370 mV
0.88 %
81 dB
AM-rejection
Mute depth
m = 30 %
RV2 = 0 V, R3 =
V2 = 0 V, R3 = 0
60 70 dB
amute
6
7 10 dB
34 36 40
Maximum sink current
I4 0.9
1.1 mA
Stop signal output
Input frequency window
R7-8 = 22 kW
Pin 6
"fwin 23
" 39
kHz
Output voltage
HIGH
V6
7
V
LOW
Input voltage threshold
I6 < 0.5 mA
V6 = 0.5 V, Pin 5 open
V6 = 0.5 V, V5 = V8
0.1 0.5
Vi 14 20 54 m V
0.6 2.0 mV
4
Preliminary Information
Rev. A1: 07.10.1994

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U4270B 전자부품, 판매, 대치품
TELEFUNKEN Semiconductors
U 4270 B
OZONE DEPLETING SUBSTANCES POLICY STATEMENT
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. meet all present and future national and international statutory requirements and
2. regularly and continuously improve the performance of our products, processes, distribution and operating systems.
With respect to their impact on the health and safety of our employees and the public, as well as their impact on the
environment.
Of particular concern is the control or elimination of releases into the atmosphere of substances who are known as ozone
depleting substances ( ODS’s).
The Montreal Protocol ( 1987) and its London Amendments ( 1990) will severely restrict the consumption of ODS’s and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on
these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuos
improvements to eliminate the use of any ODS’s listed in the following documents that all refer to the same substances:
( 1 ) Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments
respectively
( 2 ) Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the
Environmental Protection Agency ( EPA) in the USA and
( 3 ) Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances )
respectively.
TEMIC can certify, that our semiconductors are not manufactured with and do not contain ozone depleting substances.
We reserve the right to make changes without further notice to improve technical design.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by customer. Should Buyer use TEMIC products for any unintended or unauthorized application, Buyer
shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any
claim of personal damage, injury or death associated with such unintended or unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax Number: 49 (0)7131 67 2423
Rev. A1: 07.10.1994
Preliminary Information
7

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U4270B

FM IF limiter amplifier and detector

TEMIC Semiconductors
TEMIC Semiconductors

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