CHE1270a
12-40GHz Detector
Notes
RF IN
Matching
Vdet
Vref
27kΩ
27kΩ
DC
Recommended external resistors assembly
27kΩ resistors in parallel with Vdet and Vref pads are recommended to provide the best
behaviour in the whole operating temperature range.
As the voltage detection is the difference between Vref and Vdet, the external resistor value
should be identical on these two ports.
For information, a variation of 3% leads around 1mV variation of detected voltage.
Due to ESD protection circuits on RF input, an external capacitance might be requested to
isolate the product from external voltage that could be present on the RF access.
ESD protections are also implemented on Vdet and Vref accesses.
Due to the BCB coating on the chip, qualification domain implies the chip must be glued.
Ordering Information
Chip form:
CHE1270a-98F/00
Information furnished is believed to be accurate and reliable. However United Monolithic Semiconductors
S.A.S. assumes no responsibility for the consequences of use of such information nor for any infringement of
patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of United Monolithic Semiconductors S.A.S.. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. United Monolithic Semiconductors S.A.S. products are not authorised for use
as critical components in life support devices or systems without express written approval from United Monolithic
Semiconductors S.A.S
Ref. : DSCHE1270a8205 - 25 Jun 08
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