Preliminary Information SL1914 SL1914 Satellite Tuner Front End LNA with AGC Preliminary Information DS5137 Features ● ● ● ● ● ● 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) Applications ● ● ● Satellite receiver systems Data communications systems Master Antennae Distribution Systems ISSUE 1.6 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. 6 RF INPUT AGC April 1999 2 5 4 1 8 3 OUTPUT OUTPUTB Vcca Vccb Vee Figure 1 Block Diagram 1 SP1914 Preliminary Information 8 Vcca Vccb N/C RFIP SPOT REF. Vee AGC OP OPB MP8 Figure 2 Pin Connections 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 IPIP32T 117 dBµV IPIP22T 127 dBµV Table 1 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. 2 The typical key performance numbers under nominal load ambient and supply conditions are contained in table headed Quick Reference Data. Preliminary Information SL1914 Electrical Characteristics 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 Value Min Supply current Operating range Input impedance IF input return loss Input DSB NF Variation in NF with gain setting Conversion gain minimum maximum 1, 8 Max 110 150 2150 950 2 2 2 Units Typ 75 8 9 11 -1 -10 21 Gain variation within channel +0.5 mA MHz Ω dB dB dB/dB dB dB dB dB Input referred 1 dB gain compression 2 107 dBµV Input referred IP3 2 117 dBµV Input referred IP2 2 125 dBµV 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 4 4:1 4 5, 6 5, 6 ±350 75 6 Conditions AGC = 4V Maximum gain, AGC = 0.75V 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 dB/dB 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 Max Unit -0.3 7 117 VCC+0.3 4 150 150 39.8 V dBµV V V °C °C °C/W 120 °C/W 790 mW kV -0.3 -0.3 -55 2 Conditions Transient condition only Except AGC (pin 4) Mil std-883 latest revision method 3015 class 1 Marker Freq (MHz) Z realΩ Z imag Ω 1 950 77 -6 2 1250 80 -34 3 1550 44 -44 4 2150 29 -35 +j1 +j0.5 +j2 +j0.2 0 +j5 0.2 0.5 1 ∆2 ∆ 2 5 3 X ∆ START 950.000 000MHz NORMALISED TO 50Ω 4 ∆1 –j0.2 –j5 –j2 –j0.5 STOP 2 150.000 000 MHz –j1 Figure 3 Input impedance (typical) 4 Preliminary Information SL1914 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 +j1 +j0.5 +j2 +j0.2 0 +j5 0.2 0.5 1 2 5 1∆ ∆ 2 ∆4 3∆ –j0.2 START 950.000 000MHz NORMALISED TO 50Ω –j5 –j2 –j0.5 –j1 STOP 2 150.000 000 MHz Figure 4 Output impedance (typical) 5 SP1914 Preliminary Information RF Input RF Input (pin 2) VREF 1K AGC 5K Control AGC Input (pin 4) RF outputs (pins 5, 6) Figure 6 Input/Output interface circuit 6 Preliminary Information SL1914 25 20 15 Single Ended Gain (dB) 10 5 0 -5 -10 -15 -20 -25 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 AGC Voltage (v) Figure 5 gain variation with AGC voltage (typical) 7 For more information about all Zarlink products visit our Web Site at www.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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