THIS DOCUMENT IS FOR MAINTENANCE
PURPOSES ONLY AND IS NOT
RECOMMENDED FOR NEW DESIGNS
SL1452
WIDEBAND LINEAR FM DETECTOR FOR SATELLITE TV
With a minimum of external components, the SL1452 forms a
complete wideband FM detector suitable for use in satellite TV.
The video output and bandwidth may be optimised by adjustment
of the working Q of the quadrature coil.
ADVANCE INFORMATION
2029-2·1
FEATURES
■ High Operating Frequency Simplifies Image Filtering
■ Negligible Differential Gain and Phase Errors
■
Video Bandwidth Suitable for High Definition TV
■ High Sensitivity and Wide Dynamic Range
■ Wide Operating Frequency Range: 300 to 1000 MHz
■ Electrostatic Protection*
* Normal ESD handling precautions should be observed
ORDERING INFORMATION
SL1452 NA DP (8-lead plastic DIL package)
SL1452 NA MP (8-lead miniature plastic DIL package)
ABSOLUTE MAXIMUM RATINGS
Operating temperature range
Supply voltage, pin 6
Input voltage, pin 7 or 8
Storage temperature
Junction temperature
1k
210°C to180°C
2·5V p-p
255°C to 1150°C
1175°C
2k
7V
8
INPUT SIGNAL
7
INPUT REF
6
V
CC
5
VIDEO OUTPUT
INPUT SIGNAL
8
INPUT REF
7
V
6
VIDEO OUTPUT
5
CC
DEMODULATOR COIL
DEMODULATOR COIL
0V
DEMODULATOR COIL
DEMODULATOR COIL
0V
0V
0V
1
2
SL1452
3
4
1
2
SL1452
3
4
Fig. 1 Pin connections - top view (not to scale)
QUADRATURE
DEMODULATOR
COMPONENTS
32
V
CC
6
DP8
MP8
INPUT REF
INPUT SIGNAL
7
8
1k
INPUT
AMPLIFIER
70p
2k
44
2p
2p
DEMODULATOR
AMPLIFIER
1
0V40V
VIDEO
5
VIDEO OUTPUT
Fig. 2 Block diagram
SL1452
ELECTRICAL CHARACTERISTICS
These characteristics are guaranteed over the following conditions (unless otherwise stated):
T
= 125°C, V
AMB
= 14·5V to 15·5V, Q = 6, f = 612MHz
CC
Characteristic
Supply current, I
CC
Video output voltage
Video bandwidth
Minimum operating frequency
Maximum operating frequency
Input voltage
Intermodulation
Differential gain
Differential phase
Signal-to-noise ratio
23
Pin
6
5
5
8
8
8
5
Min.
10
Typ. Max.
40
50
0·7
14
300
1000
300
260
Units
mA
V p-p
MHz
MHz
MHz
mVrms
dB
V
= 5V
CC
Df = 13·5MHz p-p
Product of input modulation: f = 4·4MHz,
Conditions
Df = 13·5MHz p-p and f = 6MHz,Df = 2MHz p-p
(PAL colour and sound subcarriers).
Value
5
,61
%
Df = 13·5MHz p-p. Demodulated staircase
referred to input staircase before modulation.
5
,61
deg
Demodulated colour bar waveform referred to
waveform before modulation.
5
70
dB
Ratio of output with Df = 13·5MHz p-p at 1MHz
to output rms noise in 10MHz bandwidth
with Df = 0.
QUADRATURE COIL
15V
15V
1·75k
2p
2p
3·2k
400 400
1·8k
0V
2·5V 2·5V
2mA
0V
INPUT
SIGNAL
Fig. 3 Input/output interface circuits
640
2mA
0V
2k 2k
70p
1k 1k
3mA
0V
87
INPUT
REF
5
VIDEO
OUTPUT
0V
2