zxct1107 Diodes, Inc., zxct1107 Datasheet

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zxct1107

Manufacturer Part Number
zxct1107
Description
Low Power High-side Current Monitors
Manufacturer
Diodes, Inc.
Datasheet

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Part Number
Manufacturer
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Price
Part Number:
zxct1107SA-7
Manufacturer:
ON
Quantity:
21 000
Part Number:
zxct1107SA-7
Manufacturer:
DIODES
Quantity:
3 000
Description
Features
Applications
The ZXCT1107/09/10 are high side unipolar current sense
monitors. These devices eliminate the need to disrupt the
ground plane when sensing a load current.
The wide common-mode input voltage range and low
quiescent current coupled with SOT23 packages make
them suitable for a range of applications; including
adapters, automotive and systems operating from industrial
24V rails.
The device is line powered and as such doesn’t need a
separate supply rail.
Quiescent current is only 3µA thereby minimising current
sensing error. One external gain setting resistor increases
versatility by permitting wide gain ranges.
Typical Application Circuit
ZXCT1107/1109/1110
Document number: DS35033 Rev. 1 - 2
Wide supply and common-mode voltage range:
2.5V to 36V
SOT23 packages
o
o
Low quiescent current (3µA).
Extended industrial temperature range -40 to 125°C
AEC-Q100 Grade1 Automotive qualified variants
Automotive current measurement
Industrial applications current measurement
Battery management
Over current monitor
Power Management
3-pin
5-pin
ZXCT1107/09
ZXCT1110
www.diodes.com
LOW POWER HIGH-SIDE CURRENT MONITORS
1 of 17
Pin Assignments
Diodes Incorporated
OUT
OUT
OUT
OUT
NC
NC
GND
GND
OUT
OUT
A Product Line of
1
1
1
1
3
3
2
2
1
1
ZXCT1107
ZXCT1107/1109/1110
ZXCT1109
Top View
Top View
ZXCT1110
Top View
3
3
3
3
2
2
2 S+
2 S+
4
4
5
5
S+
S+
S-
S-
S-
S-
S+
S+
S-
S-
© Diodes Incorporated
MARCH 2011

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zxct1107 Summary of contents

Page 1

... Description The ZXCT1107/09/10 are high side unipolar current sense monitors. These devices eliminate the need to disrupt the ground plane when sensing a load current. The wide common-mode input voltage range and low quiescent current coupled with SOT23 packages make them suitable for a range of applications; including adapters, automotive and systems operating from industrial 24V rails ...

Page 2

... Notes. 1. For the ZXCT1107 and ZXCT1109 pin 1 (OUT) acts as both the output pin and substrate connection. This means that for the ZXCT1107 and ZXCT1109 the minimum rail voltage that can be used is 2. Absolute Maximum Ratings Description Voltage on S- and S+ relative to OUT (ZXCT1107/9) ...

Page 3

... Electrical Characteristics (T A ZXCT1107, ZXCT1109 Symbol Parameter I S- input current Output current OUT I Output current temperature coefficient OUT -TC CMSR Common-Mode Sense rejection BW -3dB Small Signal Bandwidth ZXCT1107/1109/1110 Document number: DS35033 Rev LOW POWER HIGH-SIDE CURRENT MONITORS 5 = 25° 20V, V ...

Page 4

... V = 10mV SENSE (AC) PP, 25° 2.5kΩ GAIN =10mV. This will include an error due to bias SENSE www.diodes.com A Product Line of Diodes Incorporated ZXCT1107/1109/1110 = 0 unless otherwise stated) (cont.) GAIN T Min Typ Max Units µA 2.2 5.8 19 100 0.1 0.4 0.13 µ ...

Page 5

... T =25°C A 300 T = 0°C A 250 T = -40°C A 200 150 100 50 0 0.0 400 500 600 SENSE www.diodes.com A Product Line of ZXCT1107/1109/1110 = 20V 3. 110 125 TEMPERATURE (°C) Input Current vs. Ambient Temperature OUT = 0V SENSE ...

Page 6

... S+ 0.25% 0.20% 0.15% 0.10% V SENSE 0.05% 0.00% -0.05% -0.10% -0.15% -0.20% -0.25% 400 500 600 0 SENSE www.diodes.com A Product Line of Diodes Incorporated ZXCT1107/1109/1110 110 125 TEMPERATURE(°C) Output Current vs. Ambient Temperature 500mV OUT SENSE = 5mV SENSE V = 150mV SENSE V = 10mV V = 100mV SENSE SENSE V = 50mV V = 30mV SENSE ...

Page 7

... V (V) S+ Output Current Error vs. V ZXCT1107/1109/1110 Document number: DS35033 Rev Product Line of Diodes Incorporated LOW POWER HIGH-SIDE CURRENT MONITORS T = 125° 85° 25° 0° -40° www.diodes.com ZXCT1107/1109/1110 MARCH 2011 © Diodes Incorporated ...

Page 8

... Input -108 -16.5 -110 -112 - Small Signal Pulse Response www.diodes.com A Product Line of ZXCT1107/1109/1110 - 0V, S+ GND = -20V R = 10k GAIN -9 Output -13 -17 Input -21 - TIME (µs) Large Signal Pulse Response ...

Page 9

... ZXCT1107/1109/1110 Document number: DS35033 Rev LOW POWER HIGH-SIDE CURRENT MONITORS Test Circuit for Pulse Response 100k 1M 10M Test circuit for CMRR 1M 10M Test circuit for Small signal bandwidth www.diodes.com A Product Line of Diodes Incorporated ZXCT1107/1109/1110 MARCH 2011 © Diodes Incorporated ...

Page 10

... The ZXCT1110 has a separate ground pin whereas the ZXCT1107 and ZXCT1109 do not. The use of ZXCT1110 allows reduction of the absolute current measurement error in some applications by providing a reduced output offset current. The ZXCT1107 provides a mirror image pin assignment of the ZXCT1109 to ease PCB layout in very small equipment designs. ...

Page 11

... This shows that the error is reduced with increasing 082 = V V [only for ZXCT1110] ε − SENSE the application, the effect of the external resistor tolerances must also be taken into account. Table 1: ZXCT1107/ZXCT1109 Error V SENSE 10mV 30mV 100mV 200mV Table 2: ZXCT1110 Error V SENSE 10mV 30mV 100mV ...

Page 12

... The sense and output resistors will contribute a total possible error of 2%, so the ZXCT11xx error must not exceed 4%. From Table 1, the error of ZXCT1107/1109 will be 3.4% if the sense voltage is 100mV. This satisfies the total error requirement of 6%. Equation 4 gives R = 100mV/2A = 50mΩ ...

Page 13

... ZXCT1107/1109/1110 Document number: DS35033 Rev LOW POWER HIGH-SIDE CURRENT MONITORS = 12500Ω 20mΩ I LOAD SUPPLY S+ S- GND OUT OUTPUT V OUT 13k GND www.diodes.com A Product Line of Diodes Incorporated ZXCT1107/1109/1110 LOAD MARCH 2011 © Diodes Incorporated ...

Page 14

... An additional output clamping diode may be required for higher gains chosen to give a suitable bias current in D1 for the given supply voltage range. ZXCT1107/1109/1110 Document number: DS35033 Rev Product Line of Diodes Incorporated ZXCT1107/1109/1110 LOW POWER HIGH-SIDE CURRENT MONITORS is typically a few kΩ, the output voltage is GAIN www.diodes.com ...

Page 15

... ZXCT1107/1109/1110 Document number: DS35033 Rev Product Line of Diodes Incorporated LOW POWER HIGH-SIDE CURRENT MONITORS Figure 5. 450V Current Monitor www.diodes.com ZXCT1107/1109/1110 MARCH 2011 © Diodes Incorporated ...

Page 16

... Diodes Incorporated LOW POWER HIGH-SIDE CURRENT MONITORS Device Reel Size Marking 1107 7”, 180mm 1109 7”, 180mm 1110 7”, 180mm (All Dimensions in mm www.diodes.com A Product Line of ZXCT1107/1109/1110 Quantity Tape Width Per Reel (mm) 3000 8 3000 8 3000 8 MARCH 2011 © Diodes Incorporated ...

Page 17

... Incorporated products in such safety-critical, life support devices or systems. Copyright © 2011, Diodes Incorporated www.diodes.com ZXCT1107/1109/1110 Document number: DS35033 Rev Product Line of Diodes Incorporated ZXCT1107/1109/1110 LOW POWER HIGH-SIDE CURRENT MONITORS IMPORTANT NOTICE LIFE SUPPORT www.diodes.com MARCH 2011 © Diodes Incorporated ...

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