參數(shù)資料
型號(hào)： TDA9815
廠(chǎng)商： NXP SEMICONDUCTORS
元件分類(lèi)： 接收器
英文描述： Multistandard/MAC VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator(帶QSS-IF和雙路FM-PLL/AM解調(diào)器的多標(biāo)準(zhǔn)/媒體存取控制 VIF-PLL)
中文描述： AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP32
封裝： 0.400 INCH, PLASTIC, SOT-232-1, SDIP-32
文件頁(yè)數(shù)： 8/40頁(yè)
文件大小： 265K
代理商： TDA9815
1998 Feb 11
8
Philips Semiconductors
Product specification
Multistandard/MAC VIF-PLL with QSS-IF
and dual FM-PLL/AM demodulator
TDA9815
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)
= 60 K/W.
Machine model class B (L = 2.5
μ
H).
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
P
supply voltage (pin 29)
maximum chip temperature
of 125
°
C; note 1
0
7.0
V
V
i
voltage at pins 1 to 9, 11 to 19, 22, 23 and
26 to 32
maximum short-circuit time
tuner AGC output voltage
storage temperature
operating ambient temperature
electrostatic handling voltage
0
V
P
V
t
s(max)
V
19
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
60
K/W
相關(guān)PDF資料
PDF描述
TDA9817 Single/Multistandard VIF/SIF-PLL and FM-PLL/AM demodulator(單一/多標(biāo)準(zhǔn)的VIF/SIF-PLL and FM-PLL/AM解調(diào)器)
TDA9818 Single/Multistandard VIF/SIF-PLL and FM-PLL/AM demodulator(單一/多標(biāo)準(zhǔn)的VIF/SIF-PLL and FM-PLL/AM解調(diào)器)
TDA9818T Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators
TDA9817TS Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators
TDA9817T Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators
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參數(shù)描述
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