ADL5243 100 MHz TO 4000 MHz RF/IF Digitally Controlled VGA

The ADL5243 is a high performance, digitally controlled variable gain amplifier operating from 100 MHz to 4000 MHz.

The VGA integrates two high performance amplifiers and a digital step attenuator (DSA). Amplifier 1 (AMP1) is an internally matched gain block amplifier with 20 dB gain, and Amplifier 2 (AMP2) is a broadband ¼ W driver amplifier that requires very few external tuning components. The DSA is 6-bit with a 31.5 dB gain control range, 0.5 dB steps, and ±0.25 dB step accuracy. The attenuation of the DSA can be controlled using a serial or parallel interface.

The gain block and DSA are internally matched to 50 Ω at their inputs and outputs, and all three internal devices are separately biased. The separate bias allows all or part of the ADL5243 to be used, which allows for easy reuse throughout a design. The pinout of the ADL5243 also enables the gain block, DSA, or ¼ W driver amplifier to be first, giving the VGA maximum flexibility in a signal chain.

The ADL5243 consumes 175 mA and operates off a single supply ranging from 4.75 V to 5.25 V. The VGA is packaged in a thermally efficient, 5 mm × 5 mm, 32-lead LFCSP and is fully specified for operation from −40°C to +85°C. A fully populated evaluation board is available.

Applications
  • Wireless infrastructure
  • Automated test equipment
  • RF/IF gain control
Features and Benefits
  • Operating frequency from 100 MHz to 4000 MHz
  • Digitally controlled VGA with serial and parallel interfaces
  • 6-bit, 0.5 dB digital step attenuator
  • 31.5 dB gain control range with ±0.25 dB step accuracy
  • Gain block, DSA, or ¼ W driver amplifier can be first
  • The companion ADL5240 integrates a gain block with DSA
  • Gain Block Amplifier 1
      Gain: 19.2 dB at 2140 MHz
      OIP3: 40.2 dBm at 2140 MHz
      P1dB: 19.8 dBm at 2140 MHz
      Noise figure: 2.9 dB at 2140 MHz
  • ¼ W Driver Amplifier 2
      Gain: 14.2 dB at 2140 MHz
      OIP3: 41.1 dBm at 2140 MHz
      P1dB: 26.0 dBm at 2140 MHz
      Noise figure: 3.7 dB at 2140 MHz
  • Low quiescent current of 175 mA
  • RF & Microwave
    S-Parameters
    Software & Systems Requirements
    Data Sheets
    Documentnote
    ADL5243: 100 MHz to 4000 MHz RF/IF Digitally Controlled VGA Data Sheet (Rev. B)PDF 750 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    ADL5243ACPZ-R7 Production32 ld LFCSP (5x5mm) w/3.3mm exposed padREEL 1500-40 to 85C05.79Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    ADL5243-EVALZEvaluation Board100.19Y
    Reference Materials
    ADL5243:小数N分频频率合成器 (Rev. B) adl5243
    ADL5243: 100 MHz to 4000 MHz RF/IF Digitally Controlled VGA Data Sheet (Rev B, 09/2012) ADL5243
    ADL5243 S-参数 adl5243
    ADL5240和ADL5243评估软件 adl5240
    ADL5243: 100 MHz to 4000 MHz RF/IF Digitally Controlled VGA Data Sheet (Rev. B) adl5243
    RF Source Booklet adf9010