TDA8012A Philips Semiconductors, TDA8012A Datasheet - Page 7

• Manufacturer Part Number: TDA8012A
• Description: Low power PLL FM demodulator for satellite TV receivers
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Notes
1. The DC supply current is measured with V
2. The VCO frequency drift is defined as the change in oscillator frequency for a variation of ambient temperature, on
3. The circuit is designed for an input level of 57 dB V. The maximum allowable input level for the PLL design is
4. The input impedance is reduced to a resistor with a parallel reactance. The values are given at 480 MHz. In order to
5. The PLL loop gain shift and drift are given without loop filter shift and drift (non-temperature compensated external
1997 May 26
Automatic gain control (note 12)
TH
LD
S
V
Keying pulse
t
t
V
V
Z
AFC and carrier detector output (note 15)
I
---------------- -
key
W(key)
L(pd)
SYMBOL
i
f
f
AGC
sat(AGC)
IL
IH
Low power PLL FM demodulator for
satellite TV receivers
V
AFC(shift)
AFC
AGC
the one hand from T
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.
61 dB V. However, for levels different from 57 dB V, the optimum loop filter values will be different from those given
for the 57 dB V input level in the reference measuring set-up.
reduce the radiation from the oscillator to the RF input, it is recommended to use a symmetrical drive.
components).
AFC
f
(
drift)
automatic gain control threshold as a
function of the voltage applied to pin 10
note 13
level detector
automatic gain control steepness
low level automatic gain control output
saturation voltage
input keyed pulse time period
keyed pulse width
LOW level input keyed pulse voltage
HIGH level input keyed pulse voltage
input impedance
peak detector leakage current
automatic frequency control steepness
with unmodulated input signal
shift of automatic frequency control
voltage with respect to f
unmodulated 480 MHz input signal
drift of automatic frequency control
voltage with respect to f
shift
drift
amb
PARAMETER
= 25 C to T
VCO
VCO
amb
with
= 0 C and on the other hand from T
CC
= 5 V.
I
V
I
V
V
connected
V
T
I
I
key on
key off
note 16
T
AGCO
AGCO
AGCO
AGCO
amb
V
amb
10
10
th(AGC)
CC
7
CC
= 0.1V
= 0.9V
= 4.75 to 5.25 V
= 10 to +80 C
= 80 C; note 17
CONDITIONS
= 5%
= 0.5 mA;
= 0.5 mA;
= 0.5 mA; note 14
= 1 mA
(pin 10) not
CC
CC
amb
61
8
3.0
1
50
4.5
= 25 C to T
MIN.
57
1
1
8
200
64
10
150
5.5
TYP.
180
1.1
amb
TDA8012AM
Product specification
= 50 C. It is
53
500
0.8
250
6.5
MAX.
500
dB V
dB V
dB V
dB
dB
mA/dB
mV
V
V
k
V/MHz
kHz
MHz
nA
UNIT
s
s