GENERAL DESCRIPTION
The ADL5561 is a high performance differential amplifier optimized for RF and IF applications. The amplifier offers low noise of 2.1 nV/√Hz and excellent distortion performance over a wide frequency range, making it an ideal driver for high speed 8-bit to 16-bit analog-to-digital converters (ADCs).
The ADL5561 provides three gain levels of 6 dB, 12 dB, and 15.5 dB through a pin-strappable configuration. For the single-ended input configuration, the gains are reduced to 5.6 dB, 11.1 dB, and 14.1 dB. Using an external series input resistor expands the amplifier gain flexibility and allows for any gain selection from 0 dB to 15.5 dB.
The quiescent current of the ADL5561 is typically 40 mA and, when disabled, consumes less than 3 mA, offering excellent input-to-output isolation.

FEATURES
  −3 dB bandwidth of 2.9 GHz (AV = 6 dB)
  Low supply current: 40 mA
  Pin-strappable gain adjust: 6 dB, 12 dB, 15.5 dB
  Differential or single-ended input to differential output
  Low noise input stage: 2.1 nV/√Hz RTI at AV = 12 dB
  Low broadband distortion (Av = 6 dB)
     10 MHz: −94 dBc HD2, −87 dBc HD3
     70 MHz: −98 dBc HD2, −87 dBc HD3
     140 MHz: −95 dBc HD2, −87 dBc HD3
     250 MHz: −80 dBc HD2, −73 dBc HD3
  IMD3s of −86 dBc @ 250 MHz center
  Slew rate: 9.8 V/ns
  Fast settling of 2 ns and overdrive recovery of 3 ns
  Single-supply operation: 3 V to 3.6 V
  Power-down control
  Fabricated using the high speed XFCB3 SiGe process

APPLICATIONS
  Differential ADC drivers
  Single-ended-to-differential conversion
  RF/IF gain blocks
  SAW filter interfacing