INA300_16 Datasheet, PDF (1/41 Pages) Texas Instruments – Overcurrent-Protection, Current-Sense Comparator

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INA300
SBOS613B – FEBRUARY 2014 – REVISED APRIL 2016
INA300 Overcurrent-Protection, 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:
– Adjust Using 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
Designed for overcurrent protection applications, the
INA300 is a current-sensing comparator that detects
overcurrent by measuring the voltage developed
across a shunt resistor, and comparing that voltage to
the threshold voltage input level. The device
measures 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, which enables overcurrent alerts to be
issued in as fast 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 of –40°C to +125°C, and is
available in WSON-10 and VSSOP-10 packages.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA300
WSON (10)
VSSOP (10)
2.00 mm × 2.00 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
CBYPASS
0.1 µF
Typical Application
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
RLIMIT
Processor
GPIO
GPIO
GPIO
DAC
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.