SL1914AMP1T

Preliminary Information SL1914 SL1914 Satellite Tuner Front End LNA with AGC Preliminary Information DS5137 ISSUE 1.6 April 1999 Features q q q q q q Single chip solution for satellite tuner LNA and AGC Provides for 30 dB minimum AGC Low DSB NF at maximum gain High signal handling at minimum gain Provides differential output drive ESD protection (Normal ESD handling procedures should be observed) Ordering Information SL1914A/KG/MP1S SL1914A/KG/MP1T Description The SL1914 is a wideband LNA with AGC designed primarily for application in satellite tuner front ends, offering high signal handling capability with low noise figure compatible with most common tuner input requirements. The SL1914 is optimised to complement the SL1925, ZIF quadrature downconverter, integrating all the active RF circuitry within the tuner, in a highly compact, efficient solution, and offering a full 1-45 MS/s tuner capability. Applications q q q Satellite receiver systems Data communications systems Master Antennae Distribution Systems 6 RF INPUT 2 5 OUTPUT OUTPUTB AGC 4 1 8 3 Vcca Vccb Vee Figure 1 Block Diagram 1 SP1914 Preliminary Information Vcca RFIP Vccb N/C 8 SPOT REF. Vee AGC OP OPB MP8 Figure 2 Pin Connections Quick Reference Data Characteristic Operating frequency Input DSB NF at max gain Maximum conversion gain Minimum conversion gain IPIP32T IPIP22T Table 1 950 - 2150 9 20 -10 117 127 Units MHz dB dB dB dBµV dBµV 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. 2 Preliminary Information Electrical Characteristics SL1914 o o Tamb= -20 C to +70 C, 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 Min Value Typ 110 950 75 8 9 11 -1 Max 150 2150 Units Conditions Supply current Operating range Input impedance IF input return loss Input DSB NF Variation in NF with gain setting Conversion gain minimum maximum Gain variation within channel Input referred 1 dB gain compression Input referred IP3 Input referred IP2 Variation in second and third order intermodulation intercept points with gain setting AGC control slope variation AGC control input current Output impedance Output return loss 1, 8 2 2 2 mA MHz Ω dB dB dB/dB AGC = 4V Maximum gain, AGC = 0.75V -10 21 +0.5 dB dB dB dB 2 2 2 107 117 125 -1 dBµV dBµV dBµV dB/dB Differential power gain into 75Ω Vagc = 4V See note 1. Vagc = 0.75V AGC monotonic from Vee to Vcc Maximum channel bandwidth of 54MHz, within range 950 2150MHz Minimum specified gain setting Minimum specified gain setting, two tones at 99dBµV Minimum specified gain setting, two tones at 99dBµV 4 4 5, 6 5, 6 4:1 ±350 75 6 µA Ω dB Note 1: The AGC voltage should not exceed 4V. 3 SP1914 Preliminary Information Absolute Maximum Ratings All voltages referred to Vee at 0V. Characteristics Supply voltage IFIN and IFINB input voltage All I/O port DC offset AGC input DC offset Storage temperature Junction temperature Package thermal resistance, chip to case Package thermal resistance, chip to ambient Power consumption at 5.25V ESD protection Min -0.3 -0.3 -0.3 -55 Max 7 117 VCC+0.3 4 150 150 39.8 120 790 2 Unit V dBµV V V °C °C °C/W °C/W mW kV Conditions Transient condition only Except AGC (pin 4) Mil std-883 latest revision method 3015 class 1 Marker 1 2 3 4 Freq (MHz) 950 1250 1550 2150 Z realΩ 77 80 44 29 Z imag Ω -6 -34 -44 -35 +j1 +j0.5 +j2 +j0.2 +j5 0 0.2 0.5 1 ∆2 ∆1 ∆ 2 5 X 3 ∆ 4 –j0.2 –j5 START 950.000 000MHz NORMALISED TO 50Ω –j0.5 –j1 –j2 STOP 2 150.000 000 MHz Figure 3 Input impedance (typical) 4 Preliminary Information Marker 1 2 3 4 Freq (MHz) 950 1250 1550 2150 Z real Ω 34 35 58 84 SL1914 Z imag Ω -16 2 68 -30 +j1 +j0.5 +j2 +j0.2 +j5 0 0.2 0.5 1 2 5 1∆ 2 –j0.2 ∆ –j5 ∆ ∆4 3 START 950.000 000MHz NORMALISED TO 50Ω –j0.5 –j1 –j2 STOP 2 150.000 000 MHz Figure 4 Output impedance (typical) 5 SP1914 Preliminary Information RF Input RF Input (pin 2) VREF 1K AGC Control 5K AGC Input (pin 4) RF outputs (pins 5, 6) Figure 6 Input/Output interface circuit 6 Preliminary Information SL1914 25 20 15 10 Single Ended Gain (dB) 5 0 -5 -10 -15 -20 -25 1 1.25 1.5 1.75 2 2.25 2.5 AGC Voltage (v) 2.75 3 3.25 3.5 3.75 4 Figure 5 gain variation with AGC voltage (typical) 7 For more information about all Zarlink products visit our Web Site at w ww.zarlink.com Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor or its subsidiaries (collectively “Zarlink”) is believed to be reliable. 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