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The HMC624ALP4E is a 6-bit digital attenuator that provides 31.5 dB of attenuation control range in 0.5 dB steps.

The HMC624ALP4E offers excellent attenuation accuracy and high input linearity over the specified frequency range of 100 MHz to 6.0 GHz. However, this digital attenuator features an external AC ground capacitor that extends the operating frequency to below 100 MHz.

The HMC624ALP4E integrates two die: a CMOS driver and a gallium arsenide (GaAs) RF attenuator. The CMOS driver supports both serial and parallel control of the RF attenuator. The device also provides user-selectable power-on states and a serial output port for cascading other serial-controlled components.

The HMC624ALP4E is powered by a single positive supply voltage ranging from 3 V to 5 V and provides a CMOS/TTL-compatible control interface.

The HMC624ALP4E is housed in a compact 4 mm × 4 mm LFCSP package compliant with RoHS standards and is pin-compatible with the HMC1122 (except for the ACGx pin).

HMC624ALP4E Features

Attenuation range: 0.5 dB (LSB) steps up to 31.5 dB

Low insertion loss: 1.6 dB at 3 GHz

Excellent attenuation accuracy

High linearity

Input 0.1 dB compression point (P0.1 dB): typical value of 33 dBm

Input third-order intermodulation point (IP3): typical value of 55 dBm

High RF input power handling capability: 28 dBm

Low phase offset: 25° at 3 GHz

Single-supply operation: 3 V to 5 V

CMOS/TTL-compatible control

24-pin, 4 mm × 4 mm LFCSP package

Pin-compatible with HMC1122

HMC624ALP4E Applications

Cellular infrastructure

Microwave radio and very small aperture terminal (VSAT)

Test equipment and sensors

Intermediate frequency (IF) and radio frequency (RF) design

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