iC-HQ
HIGH-PERFORMANCE QUAD OPAMP
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Rev A1, Page 6/7
APPLICATIONS INFORMATION
To preserve the offset specification of a precision de-
vice like the iC-HQ, the soldering points of both the iC
and the external circuitry must not be exposed to differ-
ent temperatures. Such sensitive devices must not be
positioned near heat sources. Temperature differences
at metallic junctions cause contact electrification which
appears like offset voltage. In the worst case, this con-
tact voltage may even exceed the OPAMP’s intrinsic
offset by a wide margin.
Under no circumstances should the temperature be-
haviour of such a module (designed for 1 µV offset) be
tested using e.g. a hot air blower. Even measurements
conducted in a climatic test cabinet require a steady,
constant temperature.
The offset specification of the iC-HQ is – due to the
offset cancellation principle – only valid for closed loop
operation. Therefore, the comparator mode requires
a feedback to maintain its precision. A signal, which
drives the OPAMP out of its control range for a short
time, e.g. a steep input transition, in a follower config-
uration, is tolerable and will show the desired output
response with high slew rate. In an open loop con-
figuration, the continuous offset cancellation does not
work.
This specification is for a newly developed product. iC-Haus therefore reserves the right to change or update, without notice, any information contained herein,
design and specification; and to discontinue or limit production or distribution of any product versions. Please contact iC-Haus to ascertain the current data.
Copying – even as an excerpt – is only permitted with iC-Haus approval in writing and precise reference to source.
iC-Haus does not warrant the accuracy, completeness or timeliness of the specification on this site and does not assume liability for any errors or omissions
in the materials. The data specified is intended solely for the purpose of product description. No representations or warranties, either express or implied, of
merchantability, fitness for a particular purpose or of any other nature are made hereunder with respect to information/specification or the products to which
information refers and no guarantee with respect to compliance to the intended use is given. In particular, this also applies to the stated possible applications or
areas of applications of the product.
iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trade
mark rights of a third party resulting from processing or handling of the product and/or any other use of the product.
ICHAUS [ IC-HAUS GMBH ]
