ZXCT1080

Issue 1 - November 2007

9

www.zetex.com

© Zetex Semiconductors plc 2007

Figure 2

Protection/error sources for ZXCT1080

are of the order 10pF

signal loss (including potential power dissipation effects) and small signal accuracy.

due to internal offsets. For best operation the ZXCT1080 has been designed to operate with

Current monitors' basic configuration is that of a unipolar voltage to current to voltage converter

powered from a single supply rail. The internal amplifier at the heart of the current monitor may

well have a bipolar offset voltage but the output cannot go negative; this results in current

monitors saturating at very low sense voltages.

As a result of this phenomenon the ZXCT1080 has been specified to operate in a linear manner

of 0V.

Alternatively the load current can be expressed as:

ZXCT1080

S+

S-

V

OUT

V

SENSE

()xG V

O10

()

+

=

I

L

V

OUT

V

O10

()

–

()

GxR

SENSE

-------------------------------------------

=