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.
n
n
n
n
n
n
Current Sense Amplifier
– Fast Step Response: 500ns
– Low Offset Voltage: 200µV Maximum
– Low Gain Error: 0.2% Maximum
Internal 400mV Precision Reference
Internal Latching Comparators
– Power-On Reset Capability
– Fast Response Time: 500ns
– Total Threshold Error: ±1.25% Maximum
– Two Comparator Polarity Options
Wide Supply Range: 2.7V to 60V
Supply Current: 550µA
Specified for –40°C to 125°C Temperature Range
Available in 10-Lead MSOP Package
applicaTions
n
n
n
n
n
n
Overcurrent, Undercurrent and Fault Detection
Current Shunt Measurement
Battery Monitoring
Motor Control
Automotive Monitoring and Control
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.
Typical applicaTion
Fast Acting Fault Protection with Power-On Reset and Early Warning
12V
6.2V*
1k
3.3V
100
24.9k
SENSEHI SENSELO
V
+
LE
100nF
1k
100mA WARNING
2N2700
250mA DISCONNECT
OUTC2
OUTC1
V
–
INC1
1.6k
OUTA
LT6119-2
INC2
2.37k
6.04k
V
OUT
0.1
IRF9640
0.1µF
TO LOAD
V
LOAD
10V/DIV
0V
I
LOAD
200mA/DIV
0mA
V
OUTC1
5V/DIV 0V
V
OUTC2
5V/DIV 0V
Response to Overcurrent Event
10k
1.62k
100k
250mA DISCONNECT
100mA WARNING
*CMH25234B
611912 TA01a
5µs/DIV
611912 TA01b
611912f
For more information
www.linear.com/LT6119-1
1
LT6119-1/LT6119-2
absoluTe MaxiMuM raTings
Total Supply Voltage (V
+
to V
–
) .................................60V
Maximum Voltage
(SENSELO, SENSEHI, OUTA) ............................... V
+
+ 1V
Maximum V
+
– (SENSELO or SENSEHI) ....................33V
Maximum LE Voltage ................................................60V
Maximum Comparator Input Voltage ........................60V
Maximum Comparator Output Voltage......................60V
Input Current (Note 2) ..........................................–10mA
SENSEHI, SENSELO Input Current ....................... ±10mA
Differential SENSEHI or SENSELO Input Current ...±2.5mA
Amplifier Output Short-Circuit Duration (to V
–
) .. Indefinite
Operating Temperature Range (Note 3)
LT6119I ................................................–40°C to 85°C
LT6119H............................................. –40°C to 125°C
Specified Temperature Range (Note 3)
LT6119I ................................................–40°C to 85°C
LT6119H............................................. –40°C to 125°C
Maximum Junction Temperature .......................... 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
(Note 1)
pin conFiguraTion
TOP VIEW
SENSELO
LE
OUTC2
OUTC1
V
–
1
2
3
4
5
10
9
8
7
6
SENSEHI
V
+
OUTA
INC2
INC1
MS PACKAGE
10-LEAD PLASTIC MSOP
θ
JA
= 160°C/W,
θ
JC
= 45°C/W
orDer inForMaTion
LEAD FREE FINISH
LT6119IMS-1#PBF
LT6119HMS-1#PBF
LT6119IMS-2#PBF
LT6119HMS-2#PBF
TAPE AND REEL
LT6119IMS-1#TRPBF
LT6119HMS-1#TRPBF
LT6119IMS-2#TRPBF
LT6119HMS-2#TRPBF
PART MARKING*
LTGNV
LTGNV
LTGNW
LTGNW
PACKAGE DESCRIPTION
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
SPECIFIED TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
611912f
2
For more information
www.linear.com/LT6119-1
LT6119-1/LT6119-2
elecTrical characTerisTics
SYMBOL
V
+
I
S
PARAMETER
Supply Voltage Range
Supply Current (Note 4)
V
+
= 2.7V, R
IN
= 1k, V
SENSE
= 5mV
V
+
= 60V, R
IN
= 1k, V
SENSE
= 5mV
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 12V, V
PULLUP
= V
+
, V
LE
= 2.7V, R
IN
= 100Ω,
R
OUT
= R1 + R2 + R3 = 10k, gain = 100, R
C
= 25.5k, C
L
= C
LC
= 2pF, unless otherwise noted. (See Figure 3)
CONDITIONS
l
MIN
2.7
TYP
475
600
–100
MAX
60
700
1000
UNITS
V
µA
µA
µA
nA
V
LE Pin Current
V
IH
V
IL
V
OS
∆V
OS
/∆T
I
B
I
OS
I
OUTA
PSRR
CMRR
LE Pin Input High
LE Pin Input Low
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
(SENSELO, SENSEHI)
Input Offset Current
Output Current (Note 5)
Power Supply Rejection Ratio
(Note 6)
Common Mode Rejection Ratio
V
LE
= 0V, V
+
= 60V
V
+
= 2.7V to 60V
V
+
= 2.7V to 60V
V
SENSE
= 5mV
V
SENSE
= 5mV
V
SENSE
= 5mV
V
+
= 2.7V to 60V
l
l
l
1.5
0.5
–200
–300
±0.8
60
±5
300
350
200
300
V
µV
µV
µV/°C
nA
nA
nA
mA
dB
dB
dB
dB
dB
mV
Current Sense Amplifier
l
l
V
+
= 2.7V to 60V
l
1
120
114
110
103
500
–0.08
127
125
125
V
+
= 2.7V to 60V
l
V
+
= 36V, V
SENSE
= 5mV, V
ICM
= 2.7V to 36V
V
+
= 60V, V
SENSE
= 5mV, V
ICM
= 27V to 60V
l
V
SENSE(MAX)
Full-Scale Input Sense Voltage
(Note 5)
Gain Error (Note 7)
SENSELO Voltage (Note 8)
Output Swing High (V
+
to V
OUTA
)
BW
t
r
t
SETTLE
V
TH(R)
(Note 9)
V
TH(F)
(Note 9)
V
HYS
V
OL
Signal Bandwidth
Input Step Response (to 50% of
Final Output Voltage)
Settling Time to 1%
Rising Input Threshold Voltage
(LT6119-1 Comparator 1
LT6119-2 Both Comparators)
Falling Input Threshold Voltage
(LT6119-1 Comparator 2)
V
HYS
= V
TH(R)
– V
TH(F)
Comparator Input Bias Current
Output Low Voltage
High to Low Propagation Delay
R
IN
= 500Ω
V
+
= 2.7V to 12V
V
+
= 12V to 60V, V
SENSE
= 5mV to 100mV
V
+
= 2.7V, V
SENSE
= 100mV, R
OUT
= 2k
V
+
= 60V, V
SENSE
= 100mV
V
+
= 2.7V, V
SENSE
= 27mV
V
+
= 12V, V
SENSE
= 120mV
I
OUT
= 1mA
I
OUT
= 100µA
V
+
= 2.7V, V
SENSE
= 24mV Step, Output Rising Edge
V
+
= 12V to 60V, V
SENSE
= 100mV Step, Output Rising Edge
V
SENSE
= 10mV to 100mV, R
OUT
= 2k
V
+
= 2.7V to 60V
V
+
= 2.7V to 60V
V
+
= 2.7V to 60V
V
INC1,2
= 0V, V
+
= 60V
I
OUTC1,C2
= 500µA, V
+
= 2.7V
l
l
l
l
l
l
–0.2
2.5
27
0
%
%
V
V
0.2
0.5
1
140
500
500
2
V
V
MHz
kHz
ns
ns
µs
Reference and Comparator
l
395
400
405
mV
l
395
3
400
10
60
405
15
150
220
mV
mV
nA
mV
mV
µs
µs
611912f
l
l
–50
5mV Overdrive
100mV Overdrive
3
0.5
For more information
www.linear.com/LT6119-1
3
LT6119-1/LT6119-2
elecTrical characTerisTics
SYMBOL
t
RESET
t
RPW
PARAMETER
Output Fall Time
Reset Time
Minimum LE Reset Pulse Width
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 12V, V
PULLUP
= V
+
, V
LE
= 2.7V, R
IN
= 100Ω,
R
OUT
= R1 + R2 + R3 = 10k, gain = 100, R
C
= 25.5k, C
L
= C
LC
= 2pF, unless otherwise noted. (See Figure 3)
CONDITIONS
MIN
TYP
0.08
0.5
2
MAX
UNITS
µs
µs
µs
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
Input and output pins have ESD diodes connected to ground. The
SENSEHI and SENSELO pins have additional current handling capability
specified as SENSEHI, SENSELO input current.
Note 3:
The LT6119I is guaranteed to meet specified performance from
–40°C to 85°C. LT6119H is guaranteed to meet specified performance
from –40°C to 125°C.
Note 4:
Supply current is specified with the comparator outputs high.
When the comparator outputs go low the supply current will increase by
75µA typically per comparator.
Note 5:
The full-scale input sense voltage and the maximum output
current must be considered to achieve the specified performance.
Note 6:
Supply voltage and input common mode voltage are varied while
amplifier input offset voltage is monitored.
Note 7:
Specified gain error does not include the effects of external
resistors R
IN
and R
OUT
. Although gain error is only guaranteed between
12V and 60V, similar performance is expected for V
+
< 12V, as well.
Note 8:
Refer to SENSELO, SENSEHI Range in the Applications
Information section for more information.
Note 9:
The input threshold voltage which causes the output voltage of the
comparator to transition from high to low is specified. The input voltage
which causes the comparator output to transition from low to high is
the magnitude of the difference between the specified threshold and the
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Embedded System
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