LT6119-2_15 Datasheet, PDF (1/28 Pages) Linear Technology – Current Sense Amplifier, Reference and Comparators with POR

LT6119-1/LT6119-2
Features
Current Sense Amplifier,
Reference and Comparators
with POR
Description
n _{Current Sense Amplifier}
– Fast Step Response: 500ns
– Low Offset Voltage: 200µV Maximum
– Low Gain Error: 0.2% Maximum
n _{Internal 400mV Precision Reference}
n _{Internal Latching Comparators}
– Power-On Reset Capability
– Fast Response Time: 500ns
– Total Threshold Error: ±1.25% Maximum
– Two Comparator Polarity Options
n _{Wide Supply Range: 2.7V to 60V}
n _{Supply Current: 550µA}
n _{Specified for –40°C to 125°C Temperature Range}
n _{Available in 10-Lead MSOP Package}
Applications
n _{Overcurrent, Undercurrent and Fault Detection}
n _{Current Shunt Measurement}
n _{Battery Monitoring}
n _{Motor Control}
n _{Automotive Monitoring and Control}
n _{Industrial Control}
L, LT, LTC, LTM, TimerBlox, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
The LT^®6119 is a complete high side current sense device
that incorporates a precision current sense amplifier, an
integrated voltage reference and two latching comparators.
Two versions of the LT6119 are available. The LT6119-1
has the comparators connected in opposing polarity and
the LT6119-2 has the comparators connected in the same
polarity. The comparator latch functionality can be enabled
or disabled and the comparators can be configured to reset
upon power-on. The input and the open-drain outputs of
the comparators are independent from the current sense
amplifier. The comparator trip points and amplifier gain
are configured with external resistors.
The overall propagation delay of the LT6119 is typically
only 1.4µs, allowing for quick reaction to overcurrent and
undercurrent conditions. The 1MHz bandwidth allows the
LT6119 to be used for error detection in critical applica-
tions such as motor control. The high threshold accuracy
of the comparators, combined with the ability to latch
both comparators, ensures the LT6119 can capture high
speed events.
The LT6119 is fully specified for operation from –40°C
to 125°C, making it suitable for industrial and automo-
tive applications. The LT6119 is available in a small
10-lead MSOP.
Typical Application
Fast Acting Fault Protection with Power-On Reset and Early Warning
Response to Overcurrent Event
12V
6.2V*
1k
10k
1k
2N2700
0.1Ω
3.3V
24.9k
1.62k 100k
100nF
100Ω
SENSEHI SENSELO
V⁺
OUTA
LE ^LT6119-2
INC2
100mA WARNING ^OUTC2
250mA DISCONNECT
OUTC1
V^–
INC1
IRF9640
TO LOAD
0.1µF
V_OUT
6.04k
2.37k
1.6k
V_LOAD
10V/DIV
0V
I_LOAD
200mA/DIV
0mA
V_OUTC1
5V/DIV _0V
V_OUTC2
5V/DIV _0V
250mA DISCONNECT
100mA WARNING
*CMH25234B
611912 TA01a
For more information www.linear.com/LT6119-1
5µs/DIV
611912 TA01b
611912f
1