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參數(shù)資料
| 型號(hào)： | TDA7421 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | AM/FM TUNER FOR CAR RADIO AND Hi-Fi APPLICATIONS |
| 中文描述： | AM / FM調(diào)諧的汽車收音機(jī)及音響應(yīng)用 |
| 文件頁(yè)數(shù)： | 1/38頁(yè) |
| 文件大小： | 527K |
| 代理商： | TDA7421 |
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FRONT-END FOR AM/FM RECEIVERS
UP-CONVERSION ARCHITECTURE FOR AM
HIGH SPEED PLL WITH INLOCK DETECTOR
FOR OPTIMIZED RDS APPLICATIONS
SINGLE FREQUENCY REFERENCE FOR AM/FM
AM/FM STATION DETECTOR
μ
P-CONTROLLED COMPENSATION OF EX-
TERNAL COMPONENTS SPREAD
ADJUSTABLE AUDIO MUTE
FULLY PROGRAMMABLE BY I
2
C BUS
ADVANCED BICMOS TECHNOLOGY
GENERAL DESCRIPTION
The TDA7421 is a high performance tuner circuit
that integrates AM/FM sections, IF counter and
PLL synthesizer on a single chip.
Use of BICMOS technology allows the implemen-
tation of tuning functions with a minimum of exter-
nal components.
Value spread of external components can be fully
compensated by means of on-chip electrical ad-
justment controlled by external
μ
P.
The Automatic Gain Control (AGC) operates on
different sensitivities and bandwidths in order to
improve sensitivity and dynamic range. I
2
C bus
allows to control selected functions of the tuner
(AGC and amplifiers gain, PLL and counters op-
eration modes).
June 1998
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FM AGC OUT
FM RF AGC IN
FM MIX IN +
AM MIX1 IN +
AM MIX1 IN -
FM MIX IN -
XTAL D
OSC GND
VCO E
RF GND
VCO B
P
S
S
S
D
D
I
S
C
I
A
A
F
A
A
R
A
A
F
F
F
F
F
FM BW TC
FM MUTE DRIVE
FM SMETER AM SMETER
FM SD AM SD
FM QUAD+
FM IF AMP2 OUT
IF1 VCC
FM LIM IN +
IF1 GND
FM LIM IN -
D96AU546A
22 23 24 25 26
60
M
61
M
62
A
63
A
64
A
L
L
L
L
P
17 18 19 20 21
37
36
34
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35
FM QUAD-
IF2 VCC
AM REF
AM BPF
AM IF2 IN
13
14
15
16
PLL VCC
FM RF ADJ
FM ANT ADJ
XTAL G
OSC VCC
AUDIO OUT
PINS CONNECTION
TQFP64
ORDERING NUMBER:
TDA7421
TDA7421
AM/FM TUNER FOR CAR RADIO
AND Hi-Fi APPLICATIONS
1/38
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7421N | 制造商:ST 功能描述:AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS |
| TDA7427 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER |
| TDA7427A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER |
| TDA7427AAD | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER |
| TDA7427AAD1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER |
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