FTM / Power Solutions / Susumu — ATS Series Chip Attenuators

Susumu — ATS Series Chip Attenuators

January 6, 2022
Intelligent Sensing, Power Solutions
Issue 1 2022, Issue 5 2021

Susumu ATS Series Chip Attenuators

New chip attenuators provide attenuation of up to 10 dB from DC to 30 GHz

The new Susumu ATS series of chip attenuators is rated for operation at up to 30 GHz, making the products ideal for use in high-frequency communications systems, such as 5G networks.

The development of the ATS series drew on Susumu’s expertise in the design and production of innovative precision thin-film chip resistors – an attenuator is a resistor network with impedance matching. Thin film is a suitable material for high-frequency attenuators as it has no skin effect.

Susumu implemented a number of design innovations to enable the ATS series to operate at very high frequency:

The resistive elements on top of the ceramic substrate are connected to the terminal on the bottom with through-hole vias. This shortens the distance that signals travel, thus minimizing inductance.
A thinner substrate achieves the same effect
The trimming line is shaped to avoid reflections
The ground terminals surround the signal terminal to reduce interference and crosstalk

The ATS series attenuators are offered in the 0805-size chip package, and are available with attenuation values from 0 dB to 10 dB, in 1 dB increments.

Features

Operating-frequency range: DC to 30GHz
Attenuation tolerances:
- ±0.5dB from 0 GHz to 20 GHz
- ±0.75dB from 20 GHz to 30 GHz
Voltage standing wave ratio:
- Up to 1.5 from 0 GHz to 20 GHz
- Up to 1.7 from 20 GHz to 30 GHz
50 Ω impedance
100 mW rated power
Operating-temperature range:-55°C to 125°C