SL1710
Quadrature Downconverter
Preliminary Information
Supersedes October 1996 version in Media IC Handbook HB4599-1.0
DS3842 - 4.1 March 1997
The SL1710 is a quadrature downconverter, intended for
use with both Professional and Consumer Digital Satellite
Applications.
The device contains high linearity, low noise amplifiers,
quadrature mixers, plus an on-chip oscillator, operating
between 350MHz and 500MHz, which may be synthesised via
the differential prescaler outputs.
An AGC with 18dB gain control is provided to cope with a
wide range of input signal levels.
I and Q outputs are via low impedance single ended
amplifiers. These may be connected to a dual channel analog
to digital converter such as the
PCA916,
VP216, VP215 or
VP213, via a suitable anti-alias filter.
AGC
IOUT
VEEA
IFINB
IFIN
VCCA
QOUT
VEEC
1
16
VCCB
VCODIS
VCO
B
VCO
A
VEEB
PSCAL
PSCALB
VCCC
SL1710
MP16
FEATURES
s
Wide input frequency range (350-500MHz)
s
On chip oscillator with varactor tuning or SAW
resonator operation capability
s
Nominal 40dB conversion gain from IF input to I
and Q outputs
s
AGC amplifier with 18dB gain control range
s
I to Q phase match 90°C to
±
2°, gain match
better than 1dB
s
Low impedance I and Q single ended outputs,
with 15MHz
±
1dB BW
s
Divide by 32 prescaler outputs
s
Suitable for QPSK and up to 64QAM systems
Fig. 1 Pin allocation top view
ORDERING INFORMATION
SL1710/KG/MPAS
SL1710/KG/MPAD (Tape and Reel)
ABSOLUTE MAXIMUM RATINGS
Storage temperature
Junction temperature
Supply voltage
Voltage at any other pin
-55°C to +150°C
-29°C to +150°C
-0.3 to 7.0V
-0.3 to +7.0V
APPLICATIONS
s
Consumer digital satellite decoders
s
Professional digital satellite decoders
s
Communication systems
AGC
IFIN
IFINB
AGC
I OUT
AGC
Q OUT
VCODIS
VCOA
VCOB
LO
0 deg
Quadrature
generator
90 deg
÷32
PSCAL
PSCALB
Fig.2. SL1710 block diagram
MITEL [ MITEL NETWORKS CORPORATION ]
