Data brief
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August 2010 Doc ID 17851 Rev 1 1/4
4
STEVAL-ISQ013V1
Low-side current sensing demonstration board
based on the TS507
Features
■Ultra low offset voltage: 25 µV typ, 100 µV max
■Rail-to-rail input/output voltage swing
■Operating from 2.7 V to 5.5 V
■High speed: 1.9 MHz
■45° phase margin with 100 pF
■Low consumption: 0.8 mA at 2.7 V
■Very large signal voltage gain: 131 dB
■High power supply rejection ratio: 105 dB
■Very high ESD protection 5 kV (HBM)
■Latch-up immunity
■RoHS compliant
Description
Current sensing is very useful for protecting
applications. The STEVAL-ISQ013V1
demonstration board implements a low-side
current sensing which consists in placing a sense
resistor between the load and the circuit ground
and the resulting voltage drop is amplified using a
TS507 op amp.
The common mode voltage is close to ground,
whatever the voltage of the power source, so the
current sense voltage can be amplified by this low
voltage op amp without any restrictions.
The circuit offers very stable electrical
characteristics over the entire supply voltage
range and is particularly intended for automotive
and industrial applications.
STEVAL-ISQ013V1
www.st.com
Schematic circuit STEVAL-ISQ013V1
2/4 Doc ID 17851 Rev 1
1 Schematic circuit
Figure 1. Internal schematic
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STEVAL-ISQ013V1 Revision history
Doc ID 17851 Rev 1 3/4
2 Revision history
Table 1. Document revision history
Date Revision Changes
23-Aug-2010 1 Initial release.
STEVAL-ISQ013V1
4/4 Doc ID 17851 Rev 1
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