AT-263PIN

The MACOM AT-263PIN is a GaAs FET 5-bit digital attenuator designed for applications requiring accuracy, fast switching, and low power consumption. It provides a total attenuation of 31 dB with a minimum step size of 1 dB.

This attenuator operates over a frequency range of DC to 2 GHz. Key electrical specifications include a typical insertion loss of 2.4 dB at DC-0.5 GHz, 2.8 dB at DC-1.0 GHz, and 3.0 dB at DC-2.0 GHz. Attenuation accuracy is within ±(0.25 +3% of atten setting) dB for single bits and ±(0.25 +3% of atten setting) or ±0.4 dB, whichever is greater, for combinations of bits. The device features a typical VSWR of 1.6:1 for insertion loss and 1.8:1 for attenuation states. Switching speed is rated at 40 ns (50% control to 90%/10% RF) and 9 ns (10% to 90% or 90% to 10% RF).

Designed with an integral TTL driver, the AT-263PIN is housed in a hermetically sealed ceramic 16-lead surface mount package (CR-12). It operates within a temperature range of -55°C to +85°C with a temperature stability of ±0.18 dB. The nominal impedance is 50 Ω. The attenuator is RoHS compliant and halogen-free.

Typical applications include dynamic range setting in precision receiver circuits and other gain/leveling control circuits where accuracy, fast switching, very low power consumption, and low intermodulation products are required.