HMC271A

Obsolete

1dB LSB 5-Bit Digital Attenuator SMT, 0.7 - 3.7 GHz

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Overview

1 dB LSB Steps to 31 dB
CMOS Compatible Serial Data Interface

SPI Compatible Serial Output
±0.4 dB Typical Bit Error
4x4 mm QFN Plastic Package

The HMC271ALP4(E) is a broadband 5-bit positive control GaAs IC digital attenuator with a CMOS compatible serial-to-parallel driver in low cost leadless QFN 4x4 mm SMT package. Covering 0.7 to 3.7 GHz, the insertion loss is typically less than 2.5 dB. The attenuator bit values are 1 (LSB), 2, 4, 8, and 16 dB for a total attenuation of 31 dB. Accuracy is excellent at ± 0.4 dB typical with an IIP3 of up to +48 dBm. Five bit CMOS compatible serial control words are used to select each attenuation state. A single Vcc bias of +3V to +5V applied through an external 5 kOhm resistor is required.

The HMC271ALP4(E) is a replacement for the HMC271LP4(E).

Applications