zxct1021 Zetex Semiconductors plc., zxct1021 Datasheet

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zxct1021

Manufacturer Part Number
zxct1021
Description
Zxct1021 - Low Offset High-side Current Monitor
Manufacturer
Zetex Semiconductors plc.
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ZXCT1021
Manufacturer:
ZETEX
Quantity:
20 000
Part Number:
zxct1021E5TA
Manufacturer:
ZETEX
Quantity:
6 000
ZXCT1021
Low offset high-side current monitor
Description
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,
Features
Pinout information
Ordering information
Issue 9 - July 2007
© Zetex Semiconductors plc 2007
V
Order reference
ZXCT1021E5TA
GND
OUT
NC
Accurate high-side current sensing
Output voltage scaling
2.5V – 20V supply range
25 A quiescent current
1% typical accuracy
SOT23-5 package
Pinout - top view
SOT23-5
Package
V
V
SENSE
SENSE
-
+
marking
Device
1021
Released
1
Status
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.
current of just 25µA, combined with its SOT23-
5 package make it suitable for portable battery
equipment too.
Applications
Typical application circuit
Battery chargers
Smart battery packs
DC motor control
Over current monitor
Power management
Level translating
Programmable current source
Reel size
(inches)
7
With
Quantity
a
per reel
3000
minimum
www.zetex.com
Tape width
(mm)
operating
8

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zxct1021 Summary of contents

Page 1

... 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 ...

Page 2

... Voltage output referenced to GND. Intended to drive high impedance loads OUT V High impedance negative sense voltage input SENSE - V Supply and positive sense voltage input SENSE+ Issue 9 - July 2007 © Zetex Semiconductors plc 2007 -0.6V to 20V -0. +0.5V IN -40 to 85°C -55 to 150° 25°C) amb 300mW 2 ZXCT1021 www.zetex.com ...

Page 3

... SENSE V = 100mV SENSE V = 150mV SENSE SENSE V = 20V SENSE V = 100mV SENSE V = 100mV SENSE V = 10mV SENSE V = 100mV SENSE voltages due to clipping of output voltage. 3 ZXCT1021 = 15V IN Limits Unit Min. Typ. Max. 2 291 300 309 mV 0.98 1.00 1.02 V 1.47 1.50 1. 300 ppm 25 ...

Page 4

... Typical characteristics Issue 9 - July 2007 © Zetex Semiconductors plc 2007 4 ZXCT1021 www.zetex.com ...

Page 5

... Typical characteristics Issue 9 - July 2007 © Zetex Semiconductors plc 2007 5 ZXCT1021 www.zetex.com ...

Page 6

... 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 SENSE Where SENSE IN 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 ...

Page 7

... Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Issue 9 - July 2007 © Zetex Semiconductors plc 2007 Millimeters Max. 1.45 0.15 1.30 0.50 0.26 3.10 3.20 1.80 0.95 REF 1.90 REF 0.60 30° 7 ZXCT1021 Inches Min. Max. 0.0354 0.0570 0.00 0.0059 0.0354 0.0511 0.0078 0.0196 0.0035 0.0102 0.1062 0.1220 0.0866 0.1181 0.0511 ...

Page 8

... Zetex Semiconductors plc 3701-04 Metroplaza Tower 1 Zetex Technology Park, Chadderton Hing Fong Road, Kwai Fong Oldham, OL9 9LL Hong Kong United Kingdom Telephone: (852) 26100 611 Telephone: (44) 161 622 4444 Fax: (852) 24250 494 Fax: (44) 161 622 4446 asia.sales@zetex.com hq@zetex.com 8 ZXCT1021 www.zetex.com ...

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