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PDF ZXCT1021 Data sheet ( Hoja de datos )
| Número de pieza | ZXCT1021 | |
| Descripción | LOW OFFSET HIGH-SIDE CURRENT MONITOR | |
| Fabricantes | Zetex Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ZXCT1021 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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ZXCT1021
LOW OFFSET HIGH-SIDE CURRENT MONITOR
DESCRIPTION
APPLICATIONS
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.
• Battery Chargers
• Smart Battery Packs
• DC Motor control
• Over current monitor
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.
• Power Management
• Level translating
• Programmable current source
FEATURES
• Accurate high-side current sensing
• Output voltage scaling
• 2.5V – 20V supply range
• 25A quiescent current
• 1% typical accuracy
• SOT23-5 package
ORDERING INFORMATION
DEVICE
ZXCT1021E5TA
REEL
SIZE
7”
TAPE
WIDTH
8mm
TYPICAL CIRCUIT APPLICATION
QUANTITY PER
REEL
3,000 units
PARTMARK
1021
ISSUE 2 - MARCH 2004
1
SEMICONDUCTORS
1 page  
ZXCT1021
Application Information
The devices have fixed dc voltage gains of 10, no external scaling resistors are required for the output. Output
voltage is simply defined as:
Vout = 10 x Vsense (V)
Where Vsense = Vin - VLoad
PCB trace shunt resistor for low cost solution
The figure below 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 150mΩ using 1 oz copper. Smaller resistances can be used if required.
GND
Load
Total circuit solution: 1 component. Shows area of 150mΩ sense resistor
compared to SOT23 package.
Practical tolerance of the PCB resistor will be around 5% depending on
manufacturing methods.
PINOUT
N/C 1
GND 2
Vout 3
5 Load
4 Vin
Top view
PIN NAME PIN FUNCTION
N/C Not internally connected
GND
Ground
Vout
Voltage output referenced to GND. Intended to
drive high impedance loads
Load
High impedance negative sense voltage input
Vin Supply and positive sense voltage input
ISSUE 2 - MARCH 2004
5
SEMICONDUCTORS
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet ZXCT1021.PDF ] | |
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