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PDF ZXCT1008Q Data sheet ( Hoja de datos )
| Número de pieza | ZXCT1008Q | |
| Descripción | AUTOMOTIVE GRADE 20V HIGH-SIDE CURRENT MONITOR | |
| Fabricantes | Diodes | |
| Logotipo |  |
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A Product Line of
Diodes Incorporated
ZXCT1008Q
AUTOMOTIVE GRADE 20V HIGH-SIDE CURRENTQMONITOR
Description
The ZXCT1008Q is a high side current sense monitor. Using this
device eliminates the need to disrupt the ground plane when sensing a
load current.
It takes a high side voltage developed across a current shunt resistor
and translates it into a proportional output current. A user defined
output resistor scales the output current into a ground-referenced
voltage.
The wide input voltage range of 20V down to as low as 2.5V makes it
suitable for a range of applications. The ability to withstand high
voltage transients and reverse polarity connection makes this part very
suitable for automotive and other transient rich environment.
The ZXCT1008Q has been qualified to AEC-Q100 Grade 1 and is
Automotive Grade supporting PPAPs.
Pin Assignments
SOT23
Features
Low Cost, Accurate High-Side Current Sensing
-40 to +125°C Temperature Range
Up to 500mV Sense Voltage
2.5V to 20V Supply Range
4μA Quiescent Current
1% Typical Accuracy
SOT23
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Automotive Grade
Qualified to AEC-Q100 Standards for High Reliability
PPAP Capable (Note 4)
Application Circuit
Applications
Automotive Current Measurement
Automotive DC Motor Stall Detection
Over Current Monitor
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green‖ products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
4. Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and thermally the
same, except where specified. For more information, please refer to http://www.diodes.com/quality/product_compliance_definitions/.
ZXCT1008Q
Document number: DS36890 Rev. 2 - 2
1 of 9
www.diodes.com
June 2015
© Diodes Incorporated
1 page  
Typical Characteristics (cont.)
A Product Line of
Diodes Incorporated
ZXCT1008Q
Q
Application Information
The following text describes how to scale a load current to an output voltage.
VSENSE = VIN - VLOAD
= RSENSE x ILOAD
IOUT = VSENSE x 10mA/V
VOUT = IOUT x ROUT
Combining (2) and (3) VOUT can be determined to be:
VOUT = 0.01 x VSENSE x ROUT
(1)
(2)
(3)
(4)
Example:
A 1A current is to be represented by a 1V output voltage:
1) Choose the value of RSENSE to give 50mV > VSENSE > 500mV at full load.
For example set VSENSE = 100mV at 1.0A.
Rearranging (1) gives:
SE
SE=
SE SE
I AD
= 0.1/1.0 = 0.1Ω.
2) Choose ROUT to give VOUT = 1V, when VSENSE = 100mV.
Rearranging (4) for ROUT gives:
= SE SE 0.01
1
= 0.1 x 0.01 = 1kΩ
ZXCT1008Q
Document number: DS36890 Rev. 2 - 2
5 of 9
www.diodes.com
June 2015
© Diodes Incorporated
5 Page | ||
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