MAX3538 Datasheet | Maxim Integrated

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 22d B Gain-Control Range o Low Noise Figure: 5d B at Maximum Gain Setting o High Linearity: +19d Bm IIP3 (MAX3538) at Maximum Gain Setting o Low Power Consumption: <200m W (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 Open Cable™ 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 22d B 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 Open Cable 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 Open Cable is a trademark of Cable Television Laboratories, Inc. RF_GND2 VHF_IN GND UHF_IN RF_GND1 UHF_SHUNT 1 2 3 9 8 7 LNAOUT VCC RFAGC MAX3537/3538 RBIAS SEL_UHF...