Features: ·Low-Noise VGA Eliminates PIN Attenuator
·22dB Gain-Control Range
·Low Noise Figure: 5dB at Maximum Gain Setting
·High Linearity: +19dBm IIP3 (MAX3538) at Maximum Gain Setting
·Low Power Consumption: <200mW (MAX3537)
·Available in a 4mm x 4mm, 12-Pin Thin QFN PackageApplication·OpenCable Set-Top Boxes and Televisions
·Digital Set-Top Boxes
·Media Gateways
·Digital Terrestrial Receivers
·TV IF StripsPinout
SpecificationsVCC 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
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.
DescriptionThe 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 MAX3538 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).
MAX3538 Data Sheet
