0.7-4.0 GHz Five-Bit Digital Attenuator with Serial-to-Parallel Driver (0.5 dB LSB)

The SKY12349-362LF is a GaAs FET five-bit digital attenuator I/C with a serial-to-parallel driver. The device is provided in a 4 x 4 mm, 24-pin Quad Flat No-Lead (QFN) package.

The SKY12349-362LF is particularly suited for applications in which high attenuation accuracy, low insertion loss, and low intermodulation products are required.

Please note: SKY12349-362LF is being discontinued and is not recommended for new designs.


Product LifecycleLast Time Buy
Control Bits/ Interface Parallel/Serial5/S
Frequency (GHz) Min.0.7
Frequency (GHz) Max.4
LSB Attenuation (dB)0.5
Attenuation Range (dB)15.5
Typ. IL (dB)1.2-2.0
Typ. IIP3 (dBm)42
Typ. IP1 dB (dBm)32
PackageQFN, 24L
Package (mm)4 x 4 x 0.9


  • Broadband operation: 0.7 to 4.0 GHz
  • Attenuation: 15.5 dB
  • LSB attenuation: 0.5 dB
  • Low insertion loss: 1 dB @ 900 MHz
  • Positive voltage operation: 5 V
  • Integrated silicon serial-to-parallel driver
  • Small, QFN (24-pin, 4 x 4 mm) package (MSL1, 260 °C per JEDEC J-STD-020)

Product Documents