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參數(shù)資料
| 型號： | TDA8012A |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Low power PLL FM demodulator for satellite TV receivers |
| 中文描述： | 低功耗鎖相環(huán)調(diào)頻解調(diào)器，衛(wèi)星電視接收機 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 99K |
| 代理商： | TDA8012A |
1997 May 26
7
Philips Semiconductors
Product specification
Low power PLL FM demodulator for
satellite TV receivers
TDA8012AM
Notes
1.
2.
The DC supply current is measured with V
CC
= 5 V.
The VCO frequency drift is defined as the change in oscillator frequency for a variation of ambient temperature, on
the one hand from T
amb
= 25
°
C to T
amb
= 0
°
C and on the other hand from T
amb
= 25
°
C to T
amb
= 50
°
C. It is
measured in the application of Fig.4 with the following component values for the tank circuit:
Coil: 2.5 turns; diameter 2 mm; adjustable.
Capacitor: miniature ceramic plate capacitor NP0, 3.3 pF.
The circuit is designed for an input level of 57 dB
μ
V. The maximum allowable input level for the PLL design is
61 dB
μ
V. However, for levels different from 57 dB
μ
V, the optimum loop filter values will be different from those given
for the 57 dB
μ
V input level in the reference measuring set-up.
The input impedance is reduced to a resistor with a parallel reactance. The values are given at 480 MHz. In order to
reduce the radiation from the oscillator to the RF input, it is recommended to use a symmetrical drive.
The PLL loop gain shift and drift are given without loop filter shift and drift (non-temperature compensated external
components).
3.
4.
5.
Automatic gain control
(note 12)
TH
AGC
automatic gain control threshold as a
function of the voltage applied to pin 10
I
AGCO
= 0.5 mA;
V
10
= 0.1V
CC
I
AGCO
= 0.5 mA;
V
10
= 0.9V
CC
V
th(AGC)
(pin 10) not
connected
53
dB
μ
V
61
dB
μ
V
note 13
57
dB
μ
V
LD
level detector
shift
drift
automatic gain control steepness
low level automatic gain control output
saturation voltage
V
CC
= 4.75 to 5.25 V
T
amb
=
10 to +80
°
C
I
AGCO
= 0.5 mA; note 14
I
AGCO
= 1 mA
1
1
8
200
500
dB
dB
mA/dB
mV
S
AGC
V
sat(AGC)
Keying pulse
t
key
t
W(key)
V
IL
V
IH
Z
i
input keyed pulse time period
keyed pulse width
LOW level input keyed pulse voltage
HIGH level input keyed pulse voltage
input impedance
8
3.0
1
64
10
0.8
μ
s
μ
s
V
V
k
key on
key off
AFC and carrier detector output
(note 15)
I
L(pd)
V
f
peak detector leakage current
automatic frequency control steepness
with unmodulated input signal
note 16
50
4.5
150
5.5
250
6.5
nA
V/MHz
f
AFC(shift)
shift of automatic frequency control
voltage with respect to f
VCO
with
unmodulated 480 MHz input signal
drift of automatic frequency control
voltage with respect to f
VCO
V
CC
=
±
5%
±
180
±
500
kHz
f
AFC
(
drift)
T
amb
= 80
°
C; note 17
1.1
MHz
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
----------------
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