SL1935C Zarlink Semiconductor, SL1935C Datasheet

SL1935C

Manufacturer Part Number

SL1935C

Description

Manufacturer

Zarlink Semiconductor

Datasheets

1.SL1935C.pdf (23 pages)

2.SL1935C.pdf (24 pages)

Specifications of SL1935C

Case

SMD36

Date_code

06+

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Features

•

Applications

•

Satellite receiver systems.

Data communications systems.

Single chip synthesised tuner solution for quadrature

down conversion, L-band to Zero IF.

DVB compliant, operating dynamic range -70 to

-20dBm.

Compatible with DSS and DVB variable symbol rate

applications.

Selectable baseband path, programmable through

Excellent quadrature balance up to 30MHz

baseband

Excellent immunity to spurious second harmonic

(RF and LO) mixing effects.

Low oscillator phase noise and reradiation.

High output referred linearity for low distortion and

multi channel application.

Integral fast mode compliant I

frequency synthesiser, designed for high comparison

frequencies and low phase noise performance.

Buffered crystal output for clocking QPSK

demodulator.

ESD protection (Normal ESD handling procedures

should be observed).

C bus.

XTALCAP

BUFREF

C bus controlled PLL

VCCD

XTAL

IOUT

OFIA

OFIB

VCC

ADD

SDA

SCL

RFB

VEE

IFIA

IFIB

Figure 1. Pin connections

Single Chip Synthesized Zero IF Tuner

Description

The SL1935 is a complete single chip

Zero IF tuner and operates from 950 to 2150MHz. It

includes an on-board low phase noise PLL frequency

synthesiser and low noise LNA/AGC. The SL1935 is

intended primarily for application in digital satellite Network

Interface Modules and performs the complete tuner

function.

The device contains all elements necessary, with the

exception of local oscillator tuning network and crystal

reference, to produce a high performance I(n-phase) &

Q(uadrature) downconversion tuner function. Due to the

high signal handling design the device does not require

any front end tracking filters.

The SL1935 includes selectable baseband signal paths,

allowing application with two externally definable filter

bandwidths, facilitating application in variable symbol

rate and simulcast systems. The SL1935 is optimised to

interface with the VP310 (ADC/QPSK/FEC) Satellite

Channel Decoder, available from Zarlink Semiconductor

and offers a full front end solution.

SL1935C/KG/NP1Q (Tape and Reel) 36 pin SSOP

SL1935C/KG/NP1P (Tubes) 36 pin SSOP

PUMP

DRIVE

PORT P0

VEE

TANKS

TANKSB

VEE

TANKV

TANKVB

VEE

IFQA

IFQB

VCC

OFQA

OFQB

VEE

QOUT

AGCCONT

Ordering Information

bus controlled

SL1935

November 2003

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