SL1914AKG ZARLINK | Alldatasheet

Document overview

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Technical content

Features

G Single chip solution for satellite tuner LNA and AGC G Provides for 30 dB minimum AGC G Low DSB NF at maximum gain G High signal handling at minimum gain G Provides differential output drive G ESD protection (Normal ESD handling procedures should be observed)

Applications

G Satellite receiver systems G Data communications systems G Master Antennae Distribution Systems Figure 1 Block Diagram RF INPUT AGC OUTPUT OUTPUTB Vcca Vccb Vee

SP1914 Preliminary Information Figure 2 Pin Connections MP8 SPOTREF. Vcca RFIP Vee AGC Vccb N/C OP OPB Quick Reference Data Characteristic Units Operating frequency 950 - 2150 MHz Input DSB NF at max gain 9 dB Maximum conversion gain 20 dB Minimum conversion gain -10 dB IPIP3 2T 117 dB µV IPIP22T 127 dB µV Functional Description The SL1914 is a bipolar, low noise AGC amplifier designed primarily for application in satellite tuner front ends. It contains a low noise input amplifier, an AGC stage with a minimum of 30dB of gain control and a 75 Ohm output drive. It replaces all active circuitry in conventional architectures. The typical key performance numbers under nominal load ambient and supply conditions are contained in table headed Quick Reference Data. Table 1

SL1914Preliminary Information

Electrical Characteristics

Tamb = -20oC to +70oC , Vee= 0V, Vcc = 5V±5%, These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply voltage unless otherwise stated. Characteristic Pin Value Units Conditions Min Typ Max Supply current 1, 8 110 150 mA AGC = 4V Operating range 950 2150 MHz Input impedance 2 75 Ω IF input return loss 2 8 dB Input DSB NF 2 9 11 dB Maximum gain, AGC = 0.75V Variation in NF with gain -1 dB/dB setting Conversion gain Differential power gain into 75 Ω minimum -10 dB Vagc = 4V See note 1. maximum 21 dB Vagc = 0.75V dB AGC monotonic from Vee to Vcc Gain variation within +0.5 dB Maximum channel bandwidth of channel 54MHz, within range 950 - 2150MHz Input referred 1 dB gain 2 107 dB µV Minimum specified gain setting compression Input referred IP3 2 117 dB µV Minimum specified gain setting, two tones at 99dBµV Input referred IP2 2 125 dB µV Minimum specified gain setting, two tones at 99dBµV Variation in second and -1 dB/dB third order intermodulation intercept points with gain setting AGC control slope 4 4:1 variation AGC control input current 4 ±350 µA Output impedance 5, 6 75 Ω Output return loss 5, 6 6 dB Note 1: The AGC voltage should not exceed 4V.

SP1914 Preliminary Information Absolute Maximum Ratings All voltages referred to Vee at 0V. Characteristics Min Max Unit Conditions Supply voltage -0.3 7 V IFIN and IFINB input voltage 117 dB µV Transient condition only All I/O port DC offset -0.3 VCC+0.3 V Except AGC (pin 4) AGC input DC offset -0.3 4 V Storage temperature -55 150 °C Junction temperature 150 °C Package thermal resistance, 39.8 °C/W chip to case Package thermal resistance, 120 °C/W chip to ambient Power consumption at 5.25V 790 mW ESD protection 2 kV Mil std-883 latest revision method 3015 class 1 2 3 NORMALISED TO 50Ω 0.50.2 10 +j0.2 +j0.5 +j1 +j2 +j5 2 5 –j5 –j2 –j1 –j0.5 –j0.2 X START 950.000 000MHz STOP 2 150.000 000 MHz Marker Freq (MHz) Z real Ω Z imag Ω 1 950 77 -6 2 1250 80 -34 3 1550 44 -44 4 2150 29 -35 Figure 3 Input impedance (typical)

SL1914Preliminary Information Marker Freq (MHz) Z real Ω Z imag Ω 1 950 34 -16 2 1250 35 2 3 1550 58 68 4 2150 84 -30 Figure 4 Output impedance (typical) 0.50.2 10 +j0.2 +j0.5 +j1 +j2 +j5 2 5 –j5 –j2 –j1 –j0.5 –j0.2 ∆4 NORMALISED TO 50Ω START 950.000 000MHz STOP 2 150.000 000 MHz

SP1914 Preliminary Information RF Input VREF AGC Control RF Input (pin 2) AGC Input (pin 4) RF outputs (pins 5, 6) Figure 6 Input/Output interface circuit

SL1914Preliminary Information -25 -20 -15 -10 AGC Voltage (v) Single Ended Gain (dB) Figure 5 gain variation with AGC voltage (typical)

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