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參數(shù)資料
| 型號： | TDA9814 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Multistandard VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator |
| 中文描述： | 多標準資料表格與準穩(wěn)態(tài)鎖相環(huán)中頻解調器和雙FM-PLL/AM |
| 文件頁數(shù)： | 8/36頁 |
| 文件大?。?/td> | 249K |
| 代理商： | TDA9814 |
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1998 Feb 09
8
Philips Semiconductors
Product specification
Multistandard VIF-PLL with QSS-IF
and dual FM-PLL/AM demodulator
TDA9814T
The FM-PLL consists of an integrated relaxation oscillator,
an integrated loop filter and a phase detector. The
oscillator is locked to the FM intercarrier signal, output
from the limiter. As a result of locking, the oscillator
frequency tracks with the modulation of the input signal
and the oscillator control voltage is superimposed by the
AF voltage. The FM-PLL operates as an FM-demodulator.
The AF amplifier consists of two parts:
1.
The AF preamplifier for FM sound is an operational
amplifier with internal feedback, high gain and high
common mode rejection. The AF voltage from the PLL
demodulator, by principle a small output signal, is
amplified by approximately 33 dB. The low-pass
characteristic of the amplifier reduces the harmonics of
the intercarrier signal at the sound output terminal. An
additional DC control circuit is implemented to keep
the DC level constant, independent of process spread.
2.
The AF output amplifier (10 dB) provides the required
output level by a rail-to-rail output stage. This amplifier
makes use of an input selector for switching to AM/FM
or mute state, controlled by the standard switching
voltage and the mute switching voltage.
Internal voltage stabilizer and
1
2
V
P
-reference
The bandgap circuit internally generates a voltage of
approximately 1.25 V, independent of supply voltage and
temperature. A voltage regulator circuit, connected to this
voltage, produces a constant voltage of 3.6 V which is
used as an internal reference voltage.
For all audio output signals the constant reference voltage
cannot be used because large output signals are required.
Therefore these signals refer to half the supply voltage to
achieve a symmetrical headroom, especially for the
rail-to-rail output stage. For ripple and noise attenuation
the
1
2
V
P
voltage has to be filtered via a low-pass filter by
using an external capacitor together with an integrated
resistor (f
g
= 5 Hz). For a fast setting to
1
2
V
P
an internal
start-up circuit is added.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
Notes
1.
2.
I
P
= 125 mA; T
amb
= 70
°
C; R
th(j-a)
= 80 K/W.
Machine model class B (L = 2.5
μ
H).
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
P
supply voltage (pin 26)
maximum chip temperature
of 125
°
C; note 1
0
5.5
V
V
n
voltage at pins 1 to 7, 9 to 16, 19, 20 and
23 to 28
maximum short-circuit time
tuner AGC output voltage
storage temperature
operating ambient temperature
electrostatic handling voltage
0
V
P
V
t
s(max)
V
16
T
stg
T
amb
V
es
0
25
20
300
10
13.2
+150
+70
+
300
s
V
°
C
°
C
V
note 2
SYMBOL
PARAMETER
CONDITIONS
VALUE
UNIT
R
th(j-a)
thermal resistance from junction to ambient
in free air
80
K/W
相關PDF資料 |
PDF描述 |
|---|---|
| TDA9815 | Multistandard/MAC VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator(帶QSS-IF和雙路FM-PLL/AM解調器的多標準/媒體存取控制 VIF-PLL) |
| TDA9817 | Single/Multistandard VIF/SIF-PLL and FM-PLL/AM demodulator(單一/多標準的VIF/SIF-PLL and FM-PLL/AM解調器) |
| TDA9818 | Single/Multistandard VIF/SIF-PLL and FM-PLL/AM demodulator(單一/多標準的VIF/SIF-PLL and FM-PLL/AM解調器) |
| TDA9818T | Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators |
| TDA9817TS | Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9814T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator |
| TDA9815 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard/MAC VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator |
| TDA9816M | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard multimedia IF-PLL and FM radio demodulator |
| TDA9817 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators |
| TDA9817T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators |
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