LT6119-2_15 Datasheet, PDF (9/28 Pages) Linear Technology – Current Sense Amplifier, Reference and Comparators with POR

LT6119-1/LT6119-2
Pin Functions
SENSELO (Pin 1): Sense Amplifier Input. This pin must
be tied to the load end of the sense resistor.
LE (Pin 2): Latch Control Pin. When high, the comparator
latch is enabled. With the comparator latch enabled, the
comparator output will latch at a low level once tripped.
When the LE input is low, the comparator latch is disabled
and the comparator functions transparently.
OUTC2 (Pin 3): Open-Drain Comparator 2 Output. Off-
state voltage may be as high as 60V above V^–, regardless
of V⁺ used.
OUTC1 (Pin 4): Open-Drain Comparator 1 Output. Off-
state voltage may be as high as 60V above V^–, regardless
of V⁺ used.
V^– (Pin 5): Negative Supply Pin. This pin is normally con-
nected to ground.
INC1 (Pin 6): Inverting Input of Comparator 1. The second
input of this comparator is internally connected to the
400mV reference.
INC2 (Pin 7): Input of Comparator 2. For the LT6119-1
this is the noninverting input of comparator 2. For the
LT6119-2 this is the inverting input of comparator 2. The
second input of each of these comparators is internally
connected to the 400mV reference.
OUTA (Pin 8): Current Output of the Sense Amplifier. This
pin will source a current that is equal to the sense voltage
divided by the external gain setting resistor, R_IN.
V⁺ (Pin 9): Positive Supply Pin. The V⁺ pin can be con-
nected directly to either side of the sense resistor, R_SENSE.
When V⁺ is tied to the load end of the sense resistor, the
SENSEHI pin can go up to 0.2V above V⁺. Supply current
is drawn through this pin.
SENSEHI (Pin 10): Sense Amplifier Input. The internal
sense amplifier will drive SENSEHI to the same potential
as SENSELO. A resistor (typically R_IN) tied from supply
to SENSEHI sets the output current, I_OUT = V_SENSE/R_IN,
where V_SENSE is the voltage developed across R_SENSE.
For more information www.linear.com/LT6119-1
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