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參數(shù)資料
| 型號： | TDA7421N |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| 封裝： | TQFP-64 |
| 文件頁數(shù)： | 1/47頁 |
| 文件大?。?/td> | 374K |
| 代理商： | TDA7421N |
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Not For New Design
This is information on a product still in production but not recommended for new designs.
January 2009
Rev 2
1/47
1
TDA7421N
AM/FM tuner for car radio and Hi-Fi applications
Features
■ High performance front-end IC for AM/FM
receivers
■ Fully integrated high-speed PLL for optimized
RDS applications
■ FM MPX/AM audio output, 450 kHz AM IF
output for stereo AM applications
■ AM double conversion architecture
■ AM/FM station detector and digital IF-counter
■ Single frequency reference for both AM and
FM
■ Full electrical adjustment
■ i2c bus programmable
Description
The TDA7421N is a high-performance tuner
circuit which integrates AM and FM sections, PLL
frequency synthesizer and IF counter on a single
chip.
Use of BiCMOS technology allows the
implementation of tuning functions with a
minimum of external components.Value spread of
external components can be fully compensated
by means of on-chip electrical adjustment
controlled by external microprocessor.
The FM quality detection circuit, in conjunction
with the digital IF counter, enables the stop-
station function in “seek” mode and MPX mute
during reception. The combination of
programmable level detector and IF counter
allows reliable AM stop-station performance.
The Automatic Gain Control (AGC) operates on
different signal bandwidths in order to optimize
sensitivity and dynamic range.
I2C-bus controls functions such as AGC, amplifier
gains, PLL and counter settings.
LQFP64
Table 1.
Device summary
Order code
Package
Packing
TDA7421N
LQFP64
Tray
E-TDA7421N(1)
1.
In ECOPACK package see Section 8: Package information on page 45.
LQFP64
Tray
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