INA300_15 Datasheet, PDF (1/39 Pages) Texas Instruments – INA300 High- or Low-Side, Current-Sense Comparator

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INA300
SBOS613A – FEBRUARY 2014 – REVISED MARCH 2014
INA300 High- or Low-Side, Current-Sense Comparator
1 Features
•1 Wide Common-Mode Range: 0 V to 36 V
• Selectable Response Times:
– 10 µs, 50 µs, 100 µs
• Programmable Threshold:
– Adjustable Using a Single Resistor
– Programmable from 0 mV to 250 mV
• Accuracy:
– Offset Voltage: ±500 μV (Max)
– Offset Voltage Drift: 0.5 μV/°C (Max)
• Selectable Hysteresis:
– 2 mV, 4 mV, 8 mV
• Active Quiescent Current: 135 μA (Max)
• Selectable Disable Mode:
– Disabled Quiescent Current: 3.5 µA (Max)
– Disabled Input Bias Current: 500 nA (Max)
• Open-Drain Output with Latch Mode Available
2 Applications
• Overcurrent Protection
• Computers
• Servers
• Telecom Equipment
• Power Supplies
• Battery Chargers
3 Description
The INA300 is a high common-mode, current-sensing
comparator that is configured to detect overcurrent
conditions through measuring the voltage developed
across a current sensing or shunt resistor. The device
can measure this differential voltage signal on
common-mode voltages that can vary from 0 V up to
36 V, independent of the supply voltage. The device
features an adjustable threshold range that is set
using a single external limit-setting resistor. A
selectable hysteresis feature enables adjustable
operation of the comparator to accommodate the
wide input signal range of 0 mV to 250 mV.
An open-drain alert output on the device can be
configured to operate in either a transparent mode
where the output status follows the input state or in a
latched mode where the alert output is cleared when
the latch is cleared. The device response time setting
is selectable, enabling overcurrent alerts to be issued
in as quickly as 10 µs.
This device operates from a single 2.7-V to 5.5-V
supply, drawing a maximum supply current of 135 µA.
The device is specified over the extended operating
temperature range (–40°C to +125°C), and is
available in a QFN-10 package.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
INA300AIDSQ
QFN (10)
2,0 mm × 2,0 mm
CBYPASS
0.1 µF
+2.7 V to 5.5 V
Power Supply
(0 V to 36 V)
VS
IN+
+
CMP
IN
-
Load
HYS
GND
INA300
ENABLE
LATCH
ALERT
LIMIT
DELAY
RPull-up
10 k
GPIO
GPIO
GPIO
DAC
RLIMIT
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.