ZXCT1021E5TA;中文规格书,Datasheet资料
ZXCT1021
Low offset high-side current monitor
Description
Ordering information
The ZXCT1021 is a precision high-side current sense monitor. Using this type of device eliminates the need to disrupt the ground plane when sensing a load current.
The ZXCT1021 provides a fixed gain of 10 for applications where minimal sense voltage is required.
The very low offset voltage enables a typical accuracy of 3% for sense voltages of only 10mV,
giving better tolerances for small sense resistors necessary at higher currents.
The wide input voltage range of 20V down to as low as 2.5V make it suitable for a range of applications. With a minimum operating current of just 25μA, combined with its SOT23-5 package make it suitable for portable battery equipment too.
Features
?Accurate high-side current sensing ?Output voltage scaling ? 2.5V – 20V supply range ?25?A quiescent current ?1% typical accuracy ?
SOT23-5 package
Applications
?Battery chargers ?Smart battery packs ?DC motor control ?Over current monitor ?Power management ?Level translating
?
Programmable current source
Pinout information
Typical application circuit
Order reference Package Device marking Status Reel size (inches)
Quantity per reel Tape width (mm)
ZXCT1021E5TA
SOT23-5
1021
Released
7
3000
8
Absolute maximum ratings
Pinout information
Voltage on any pin
with respect to END pin -0.6V to 20V V SENSE
-0.6V to V IN +0.5V Operating temperature -40 to 85°C Storage temperature -55 to 150°C Package power dissipation (T amb = 25°C)SOT23-5
300mW
Pin name Pin function
N/C Not internally connected GND Ground
V OUT Voltage output referenced to GND. Intended to drive high impedance loads V SENSE -High impedance negative sense voltage input V SENSE+
Supply and positive sense voltage input
Electrical characteristics test conditions T amb = 25°C, V IN = 15V
Symbol Parameter Conditions
Limits Unit Min.Typ.Max.V IN V CC range 2.520V V OUT
Output voltage
V SENSE = 30mV 291300309mV V SENSE = 100mV 0.98 1.00 1.02V V SENSE = 150mV
1.47 1.50 1.53V R OUT Output resistance 10
1520k ?T C (*)NOTES:
(*)T C limits are determined by characterization Output voltage
temperature coefficient 50300ppm I Q
Ground pin current V SENSE = 0V 25
35?A V SENSE (?)(?)V SENSE = V IN - V LOAD
Sense voltage V IN = 20V 0
1.5 (?)(?)This will be reduced at lower V IN voltages due to clipping of output voltage.
V I LOAD V SENSE- load pin input current V SENSE = 0V 100
nA Acc Accuracy V SENSE = 100mV -22%Gain V OUT / V SENSE V SENSE = 100mV 9.8
1010.2
V/V BW
Bandwidth
V SENSE = 10mV 300kHz V SENSE = 100mV
2
MHz
Typical characteristics
Application information
The ZXCT1021 has a fixed dc voltage gain of 100. No external scaling resistors are required for the output. Output voltage is simply defined as:
V OUT = 10 x V SENSE (V)
Where V SENSE = V IN - V LOAD
PCB trace shunt resistor for low cost solution
Figure 1 shows a PCB layout suggestion for a low cost solution where a PCB resistive trace in replacement for a conventional shunt resistor, can be used. The resistor section is 25mm x 0.25mm giving approximately 150m? using 1 oz copper. Smaller resistances can be used if required.
Total circuit solution: 1 component. Shows area of 150m?Array sense resistor compared to SOT23 package.
Practical tolerance of the PCB resistor will be around 5%
depending on manufacturing methods.
Package outline - SOT23-5
Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches
DIM Millimeters
Inches
Min.Max.Min.Max.A 0.90 1.450.03540.0570A10.000.150.000.0059A20.90 1.300.03540.0511b 0.200.500.00780.0196C 0.090.260.00350.0102D 2.70 3.100.10620.1220E 2.20 3.200.08660.1181E1 1.30
1.80
0.0511
0.0708
e 0.95 REF 0.0374 REF e1 1.90 REF
0.0748 REF
L 0.100.600.00390.0236a°
0°
30°
0°
30°
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Zetex GmbH
Kustermann-park Balanstra?e 59D-81541 München Germany
Telefon: (49) 89 45 49 49 0Fax: (49) 89 45 49 49 49europe.sales@https://www.wendangku.net/doc/602578501.html,
Americas
Zetex Inc
700 Veterans Memorial Highway Hauppauge, NY 11788USA
Telephone: (1) 631 360 2222Fax: (1) 631 360 8222usa.sales@https://www.wendangku.net/doc/602578501.html,
Asia Pacific
Zetex (Asia Ltd)
3701-04 Metroplaza Tower 1Hing Fong Road, Kwai Fong Hong Kong
Telephone: (852) 26100 611Fax: (852) 24250 494asia.sales@https://www.wendangku.net/doc/602578501.html,
Corporate Headquarters
Zetex Semiconductors plc
Zetex Technology Park, Chadderton Oldham, OL9 9LL United Kingdom
Telephone: (44) 161 622 4444Fax: (44) 161 622 4446hq@https://www.wendangku.net/doc/602578501.html,
? 2007 Published by Zetex Semiconductors plc
Definitions
Product change
Zetex Semiconductors reserves the right to alter, without notice, specifications, design, price or conditions of supply of any product or service. Customers are solely responsible for obtaining the latest relevant information before placing orders.Applications disclaimer
The circuits in this design/application note are offered as design ideas. It is the responsibility of the user to ensure that the circuit is fit for the user’s application and meets with the user’s requirements. No representation or warranty is given and no liability whatsoever is assumed by Zetex with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Zetex does not assume any legal responsibility or will not be held legally liable (whether in contract,tort (including negligence), breach of statutory duty, restriction or otherwise) for any damages, loss of profit, business, contract,opportunity or consequential loss in the use of these circuit applications, under any circumstances.Life support
Zetex products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Zetex Semiconductors plc. As used herein:A. Life support devices or systems are devices or systems which:
1.are intended to implant into the body or
2.support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labelling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to
cause the failure of the life support device or to affect its safety or effectiveness.Reproduction
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Zetex is an ISO 9001 and TS16949 certified semiconductor manufacturer.
To ensure quality of service and products we strongly advise the purchase of parts directly from Zetex Semiconductors or one of our regionally authorized distributors. For a complete listing of authorized distributors please visit: https://www.wendangku.net/doc/602578501.html,/salesnetwork
Zetex Semiconductors does not warrant or accept any liability whatsoever in respect of any parts purchased through unauthorized sales channels.ESD (Electrostatic discharge)
Semiconductor devices are susceptible to damage by ESD. Suitable precautions should be taken when handling and transporting devices.The possible damage to devices depends on the circumstances of the handling and transporting, and the nature of the device. The extent of damage can vary from immediate functional or parametric malfunction to degradation of function or performance in use over time.Devices suspected of being affected should be replaced.Green compliance
Zetex Semiconductors is committed to environmental excellence in all aspects of its operations which includes meeting or exceeding regulatory requirements with respect to the use of hazardous substances. Numerous successful programs have been implemented to reduce the use of hazardous substances and/or emissions.
All Zetex components are compliant with the RoHS directive, and through this it is supporting its customers in their compliance with WEEE and ELV directives.Product status key:“Preview”Future device intended for production at some point. Samples may be available “Active”Product status recommended for new designs “Last time buy (LTB)”Device will be discontinued and last time buy period and delivery is in effect “Not recommended for new designs”Device is still in production to support existing designs and production “Obsolete”Production has been discontinued Datasheet status key:“Draft version”This term denotes a very early datasheet version and contains highly provisional information, which
may change in any manner without notice.
“Provisional version”This term denotes a pre-release datasheet. It provides a clear indication of anticipated performance.
However, changes to the test conditions and specifications may occur, at any time and without notice.
“Issue”This term denotes an issued datasheet containing finalized specifications. H owever, changes to
specifications may occur, at any time and without notice.
分销商库存信息: DIODES
ZXCT1021E5TA