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MAX3538 Dataheets PDF



Part Number MAX3538
Manufacturers Maxim Integrated Products
Logo Maxim Integrated Products
Description (MAX3537 / MAX3538) Broadband Variable Gain Amplifiers
Datasheet MAX3538 DatasheetMAX3538 Datasheet (PDF)

19-3445; Rev 1; 6/05 KIT ATION EVALU E L B AVAILA Broadband Variable-Gain Amplifiers General Description Features o Low-Noise VGA Eliminates PIN Attenuator o 22dB Gain-Control Range o Low Noise Figure: 5dB at Maximum Gain Setting o High Linearity: +19dBm IIP3 (MAX3538) at Maximum Gain Setting o Low Power Consumption: <200mW (MAX3537) o Available in a 4mm x 4mm, 12-Pin Thin QFN Package MAX3537/MAX3538 The MAX3537/MAX3538 broadband RF variable-gain amplifiers (VGA) are designed for digital and.

  MAX3538   MAX3538


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19-3445; Rev 1; 6/05 KIT ATION EVALU E L B AVAILA Broadband Variable-Gain Amplifiers General Description Features o Low-Noise VGA Eliminates PIN Attenuator o 22dB Gain-Control Range o Low Noise Figure: 5dB at Maximum Gain Setting o High Linearity: +19dBm IIP3 (MAX3538) at Maximum Gain Setting o Low Power Consumption: <200mW (MAX3537) o Available in a 4mm x 4mm, 12-Pin Thin QFN Package MAX3537/MAX3538 The MAX3537/MAX3538 broadband RF variable-gain amplifiers (VGA) are designed for digital and OpenCable™ set-tops and televisions. These devices feature a unique design that integrates a dual-band (UHF and VHF) input and a low-noise, variable-gain amplifier. The integrated RF VGA covers a 10MHz to 1GHz input frequency range and provides 22dB of gain-control range. The MAX3538 is intended for the most difficult signal conditions where performance is critical. The external pullup inductor improves IIP2 and IIP3 while also increasing gain for better sensitivity. The MAX3537 does not need an external pullup inductor and is ideal for low-power applications with less demanding receiver distortion requirements such as smaller TVs using indoor antennas. The MAX3537/MAX3538 are specified for operation in the 0°C to +85°C temperature range and are available in 4mm x 4mm, 12-pin thin QFN packages with exposed paddle (EP). Ordering Information PART MAX3537UTC MAX3537UTC+ MAX3538UTC MAX3538UTC+ TEMP RANGE PIN-PACKAGE PKG CODE T1244-3 T1244-3 T1244-3 T1244-3 Applications OpenCable Set-Top Boxes and Televisions Digital Set-Top Boxes Media Gateways Digital Terrestrial Receivers TV IF Strips 0°C to +85°C 12 Thin QFN-EP* 0°C to +85°C 12 Thin QFN-EP* 0°C to +85°C 12 Thin QFN-EP* 0°C to +85°C 12 Thin QFN-EP* *EP = Exposed paddle. +Denotes lead-free package. Pin Configuration/ Functional Diagram OpenCable is a trademark of Cable Television Laboratories, Inc. RF_GND2 VHF_IN GND 12 11 10 UHF_IN RF_GND1 UHF_SHUNT 1 2 3 9 8 7 LNAOUT VCC RFAGC MAX3537/3538 4 RBIAS 5 SEL_UHF 6 SHDN ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. www.DataSheet4U.com Broadband Variable-Gain Amplifiers MAX3537/MAX3538 ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +5.5V RFAGC, UHF_IN, SEL_UHF, VHF_IN, SHDN, RBIAS, RF_GND1, RF_GND2, UHF_SHUNT to GND....................................................-0.3V to (VCC + 0.3V) LNAOUT Short-Circuit Duration..............................................10s UHFIN, VHFIN Maximum RF Input Power.........................14dBm Continuous Power Dissipation (TA = +70°C) 12-Pin Thin QFN (derate 16.9mW/°C above +70°C)............................................................1349mW Operating Temperature Range...............................0°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C CAUTION! ESD SENSITIVE DEVICE Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (MAX3537/MAX3538 EV kit, VCC = 4.75V to 5.25V, no RF signal applied, TA = 0°C to +85°C, unless otherwise noted. Typical values are at VCC = 5V, RBIAS = 11.8kΩ (MAX3537) or 9.1kΩ (MAX3538), TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER Supply Voltage Supply Current RFAGC Input Bias Current RFAGC Control Voltage (Note 2) Input Logic-Level Low Input Logic-Level High 0.7 x VCC Operational mode MAX3537 MAX3538 -50 3 1 0.3 x VCC CONDITIONS MIN 4.75 38 48 2 TYP MAX 5.25 45.8 58 100 +50 UNITS V mA µA µA V V V Standby mode (VENABLE = VSEL_UHF = 0.1V) VRFAGC = 1V and 3V Maximum gain Minimum gain AC ELECTRICAL CHARACTERISTICS (MAX3537) (MAX3537 EV kit, VCC = 4.75V to 5.25V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at VCC = 5V, RBIAS = 11.8kΩ, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER Operating Frequency Range Input Return Loss Input Power Range Per Channel Voltage Gain Linear Gain-Control Range Gain Flatness Noise Figure Input 2nd-Order Intercept Point Maximum gain Measured at 50MHz, difference between maximum and minimum gain From 50MHz to 878MHz, VRFAGC = 3V (Note 2) Maximum gain, diplexer loss included Maximum gain, VRFAGC = 3V (Notes 2, 3) Minimum gain, VRFAGC = 1V 21.6 42.5 5 26 48 Diplex filter included, worst case across band, any gain setting (Note 2) CONDITIONS MIN 50 4.3 -35 7.7 19.2 9.6 23..


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