ZXCT1051_0611 ZETEX [Zetex Semiconductors], ZXCT1051_0611 Datasheet - Page 8

• Manufacturer Part Number: ZXCT1051_0611
• Description: Precision wide input range current monitor
• Manufacturer: ZETEX [Zetex Semiconductors]

The ZXCT1051 has been designed to allow it to operate from supplies (V
20V while sensing common mode signals from 0V up to V
When choosing appropriate values for R
signal loss (including potential power dissipation effects) and small signal accuracy.
Higher values for R
due to internal offsets. For best operation the ZXCT1051 has been designed to operate with
V
Due to the very nature of current monitors they tend to saturate at very low sense voltages. This
is due to them being operated from single supply and that the basic configuration is that of a
unipolar voltage to current to voltage converter. The internal amplifiers at the heart of the current
monitor may well have a bipolar offset voltage but the output cannot go negative.
For this reason the ZXCT1051 has been designed to operate in a linear manner over a V
range of 10mV to 150mV range, however it will still be monotonic down to V
The device has a fixed DC voltage gain of 10; no external scaling resistors are required for the
output. Output voltage is simply defined as:
Issue 2 - November 2006
© Zetex Semiconductors plc 2006
SENSE
V
OUT
of the order of 50mV to 150mV.
= gain x V
SENSE
SENSE
gives better accuracy at low load currents by reducing the inaccuracies
(V)
SENSE
a compromise must be reached between in-line
8
CC
-2V.
CC
) ranging from 2.7V to
SENSE
ZXCT1051
www.zetex.com
of 0V.
SENSE