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부품번호 | TEA7532DP 기능 |
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기능 | MONITOR AMPLIFIER | ||
제조업체 | ST Microelectronics | ||
로고 | |||
전체 16 페이지수
.... PROGRAMMABLE GAIN IN STEPS OF 6 dB
ON/OFF POSITION
LOW VOLTAGE
POWER : 100 mW AT 5 V
DES CRI P TI O N
This 16 pins IC is designed for monitor
(loudspeaker) telephone set and provides :
a) Signal amplification for monitoring (loudspeaker)
b) Antiacoustic feedback (antilarsen)
c) Antidistortion by automatic gain adaptation
d) Antilarsen adjustment (full duplex)
BLOCK DIAGRAM
TEA7532
MONITOR AMPLIFIER
DIP16
S O1 6
ORDERING NUMBERS : TEA7532DP (DIP16)
TEA7532FP (SO16)
July 1993
1/16
TEA7532
Figure 1 : LoudspeakerGain Versus Voltage on
Pin (3) - (8) with Pin 2 Open.
Figure 2 :LoudspeakerGain Versus Voltage on
Pin (3) - (8) and Versus R2. (*)
(*) ATTENUATION =
Zin2 (1.2 K)
Zin2 (1.2 K) + R2 (E X T)
Figure 3 : AC Output Voltage Versus Amplifier
Gain.
R2 = 10 K ⇒ ATT = 20 dB
R2 = 3 K ⇒ ATT ≈ 10 dB
Figure 4 : Power Available on Loudspeaker
Versus VLS Typical Curve.
Figure 5 : Distortion Versus Output Power.
Figure 6 : Output Power Versus Supply Current.
4/16
4페이지 TEA7532
Amplifier dc supply.
In transmission mode, the supply voltage is control-
led by the internal shunt DC regulator. For this rea-
son, the TEA7532 should be supplied from a current
source
Figure 13.
(see : supply considerations).
An antidistortion system is embodied which pro-
vides AGC control to avoid loudspeaker distortion
under current-limited conditions.
Circuit action.
When the supply voltage is insufficient, the voltage
at pin 1, falls below the reference voltage 1.1 V, re-
sulting in transistor (TR) beingswitched off, resulting
in zero current flow in resistor R. This state enables
the gain control system. Under these conditions, the
shunt DC supply will switch at a rate determined by
the time constant of the RC network on pin 3.
This switching action accomodates normal speech
Figure 14 .
characteristics under low supply conditions.
1.2. ANTIACOUSTIC FEED-BACK SYSTEM (AN-
TILARSEN SYSTEM)
The purpose of this system is to control AGC action
in order to avoid acoustic feed-back between the
loudspeaker and the microphone, when used in a
telephone set.
7/16
7페이지 | |||
구 성 | 총 16 페이지수 | ||
다운로드 | [ TEA7532DP.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
TEA7532DP | MONITOR AMPLIFIER | ST Microelectronics |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |