ADL5336 Cascadable IF VGAs with Programmable RMS Detectors

The ADL5336 consists of a pair of variable gain amplifiers (VGAs) designed for cascaded IF applications. The amplifiers have linear-in-dB gain control and operate from low frequencies to 1 GHz. Their excellent gain conformance over the control range and flatness over frequency are due to Analog Devices, Inc., patented X-AMP® architecture, an innovative technique for implementing high performance variable gain control.

Each VGA has 24 dB of gain control range. Their maximum gain can be independently programmable over a 6 dB range via the SPI. The VGAs can be cascaded to provide a total range of 48 dB. When connected to a 50 Ω source through a 1:4 balun, the gain is 6 dB higher. The second VGA has an SPI programmable input switch that selects one of two external inputs.

When driven from a 200 Ω source or from a 50 Ω source through a 1:4 balun, the noise figure (NF) for the composite amplifier is 6.8 dB at maximum gain. The output of each VGA can drive 100 Ω loads to 5 V p-p maximum.

Each VGA has an independent square law detector for autonomous, automatic gain control (AGC) operation. Each detector setpoint can be programmed independently through the SPI from −24 dBV to −3 dBV in 3 dB steps. When both VGAs are arranged in AGC mode and are programmed to the same setpoint, the composite NF increases to 9 dB when backed off by 18 dB from maximum gain.

The ADL5336 operates from a 5 V supply and consumes a typical supply current of 80 mA. When disabled, it consumes 4 mA. It is fabricated in an advanced silicon-germanium BiCMOS process and is available in a 32-lead exposed paddle LFCSP package. Performance is specified over a −40°C to +85°C temperature range.

Applications
  • Point-to-multipoint radios
  • Instrumentation
  • Medical
Features and Benefits
  • Pair of VGAs with rms AGC detectors
  • VGA and AGC modes of operation
  • Continuous gain control range: 48 dB
  • Noise figure (NF) = 6.8 dB at maximum gain
  • IMD3 > 62 dBc for 1.0 V p-p composite output
  • Differential input and output
  • Multiplexed inputs for VGA2
  • Programmable detector AGC setpoints
  • Programmable VGA maximum gain
  • Power-down feature
  • Single 5 V supply operation
  • RF & Microwave
    Reference Designs
    Software & Systems Requirements
    Data Sheets
    Documentnote
    ADL5336: Cascadable IF VGAs with Programmable RMS Detectors Data Sheet (Rev. B)PDF 926 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    ADL5336ACPZ-R7 Production32 ld LFCSP (5x5mm)REEL 1500-40 to 85C06.57Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    ADL5336-EVALZEvaluation Board150Y
    Reference Materials
    ADL5336: Cascadable IF VGAs with Programmable RMS Detectors Data Sheet (Rev B, 02/2012) ADL5336
    CN0248 设计和集成文件 adl5336
    Windows 7 Drivers for the SPI Software adl5336
    ADL5336 Evaluation Board Software adl5336
    ADL5336: Cascadable IF VGAs with Programmable RMS Detectors Data Sheet (Rev. B) adl5336
    RF Source Booklet adf9010
    CN-0248:基于IQ解调器,具有中频和基带可变增益以及可编程基带滤波功能的中频至基带接收机 adl5336