Diodes ZXCT1010 User Manual
SEMICONDUCTORS
ENHANCED HIGH-SIDE CURRENT MONITOR
ZXCT1010
DESCRIPTION
The ZXCT1010 is a high side current sense monitor.
Using this device eliminates the need to disrupt the
ground plane when sensing a load current.
It is an enhanced version of the ZXCT1009 offering
reduced typical output offset and improved accuracy
at low sense voltage.
The wide inputvoltage range of 20V downto aslow as
2.5V make it suitable for a range of applications. A
minimum operating current of just 4µA, combined
with its SOT23-5 package make suitable for portable
battery equipment.
FEATURES
• Low cost, accurate high-side current sensing
• Output voltage scaling
• Up to 2.5V sense voltage
• 2.5V – 20V supply range
• 300nA typical offset current
• 3.5µA quiescent current
• 1% typical accuracy
•
SOT23 -5 package
APPLICATIONS
Battery chargers
•
Smart battery packs
•
DC motor control
•
Over current monitor
•
Power management
•
Programmable current source
•
APPLICATION CIRCUIT
ORDERING INFORMATION
DEVICE REEL
ZXCT1010E5TA 7” 8mm 3,000 units
PARTMARK 101
PACKAGE SOT23-5
ISSUE 10 - JULY 2007
SIZE
TAPE
WIDTH
QUANTITY PER
REEL
1
SEMICONDUCTORS
ZXCT1010
ABSOLUTE MAXIMUM RATINGS
Voltage on any pin -0.6V to 20V (relative to GND)
Continuous output current, I
Continuous sense voltage, V
Operating temperature, T
Storage temperature -55 to 150°C
Package power dissipation (T
SOT23-5 300mW
Operation above the absolute maximum rating may cause device failure.
Operation at the absolute maximum ratings, for extended periods, may reduce device reliability.
ELECTRICAL CHARACTERISTICS
Test Conditions TA= 25°C, Vin= 5V, R
SYMBOL PARAMETER CONDITIONS LIMITS UNIT
V
in
I
out
I
q
V
sense
I
sense
Acc Accuracy
Gm Transconducta
BW Bandwidth V
1
Includes input offset voltage contribution
2
V
SENSE
3
-20dBm=63mVp-p into 50Ω
VCCRange 2.5 20 V
1
Output current V
Ground pin
current
2
Sense Voltage 0 2500 mV
-V
sense
-
input current
nce,
I
out/Vsense
is defined as the differential voltage between V
V
= V
SENSE
SENSE+
= VIN- V
= I
LOAD
LOAD
x R
,
A
- V
SENSE
OUT
SENSE-
, 25mA
2
, -0.5V to +5V
SENSE
sense
V
sense
V
sense
V
sense
V
sense
V
sense
R
sense
V
sense
SENSE(DC)
V
SENSE(DC)
-40 to 85°C
= 25°C)
A
= 100Ω.
out
Min Typ Max
=0V
= 10mV
=100mV
= 200mV
=1V
0
85
0.975
1.95
9.7
0.3
100
1.00
2.00
10.0
10
115
1.025
2.05
10.3
=0V 3.5 8 µA
100 nA
=0.1Ω
=200mV
-2.5 2.5 %
10000 µA/V
= 10mV, Pin = -40dBm ‡
= 100mV, Pin = -20dBm ‡
and V
SENSE+
SENSE-
.
300
2
µA
µA
mA
mA
mA
kHz
MHz
ISSUE 10 - JULY 2007
SEMICONDUCTORS
TYPICAL CHARACTERISTICS
ZXCT1010
ISSUE 10 - JULY 2007
3
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