that incorporates a precision current sense amplifier, an
integrated voltage reference and a latching comparator.
The comparator latch functionality can be enabled or
disabled and the comparator can be configured to reset
upon power-on. The input and the open-drain output of
the comparator are independent from the current sense
amplifier. The comparator trip point and amplifier gain are
configured with external resistors.
The overall propagation delay of the LT6118 is typically only
1.4µs, allowing for quick reaction to overcurrent condi-
tions. The 1MHz bandwidth allows the LT6118 to be used
for error detection in critical applications such as motor
control. The high threshold accuracy of the comparator,
combined with the ability to latch the comparator, ensures
the LT6118 can capture high speed events.
The LT6118 is fully specified for operation from –40°C to
125°C, making it suitable for industrial and automotive
applications. The LT6118 is available in the small 8-lead
MSOP and 8-lead DFN packages.
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.
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 Comparator
– Power-On Reset Capability
– Fast Response Time: 500ns
– Total Threshold Error: ±1.25% Maximum
Wide Supply Range: 2.7V to 60V
Supply Current: 450µA
Specified for –40°C to 125°C Temperature Range
Available in 8-Lead MSOP and 8-Lead (2mm
×
3mm)
DFN Packages
applicaTions
n
n
n
n
n
n
Overcurrent and Fault Detection
Current Shunt Measurement
Battery Monitoring
Motor Control
Automotive Monitoring and Control
Industrial Control
Typical applicaTion
Fast Acting Fault Protection with Power-On Reset
12V
6.2V*
1k
24.9k
3.3V
10k
2N2700
100nF
100
SENSEHI SENSELO
V
+
1k
LE
LT6118
6.04k
OUTC
INC
1.6k
6118 TA01a
Response to Overcurrent Event
IRF9640
TO LOAD
0.1
0.1µF
V
OUT
V
LOAD
10V/DIV
0V
I
LOAD
200mA/DIV
0mA
V
OUTC
5V/DIV 0V
250mA DISCONNECT
OUTA
250mA DISCONNECT
V
–
*CMH25234B
5µs/DIV
6118 TA01b
6118f
For more information
www.linear.com/LT6118
1
LT6118
absoluTe MaxiMuM raTings
(Note 1)
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)
LT6118I ................................................–40°C to 85°C
LT6118H............................................. –40°C to 125°C
Specified Temperature Range (Note 3)
LT6118I ................................................–40°C to 85°C
LT6118H............................................. –40°C to 125°C
Maximum Junction Temperature .......................... 150°C
Storage Temperature Range .................. –65°C to 150°C
MSOP Lead Temperature (Soldering, 10 sec)........ 300°C
pin conFiguraTion
TOP VIEW
TOP VIEW
SENSELO
LE
OUTC
V
–
1
2
3
4
8
7
6
5
SENSEHI
V
+
OUTA
INC
SENSELO 1
LE 2
OUTC 3
V
–
8 SENSEHI
9
7 V
+
6 OUTA
5 INC
4
MS8 PACKAGE
8-LEAD PLASTIC MSOP
θ
JA
= 163°C/W,
θ
JC
= 45°C/W
DCB PACKAGE
8-LEAD (2mm
×
3mm) PLASTIC DFN
θ
JA
= 64°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 9) IS V
–
, PCB CONNECTION OPTIONAL
orDer inForMaTion
LEAD FREE FINISH
LT6118IMS8#PBF
LT6118HMS8#PBF
TAPE AND REEL
LT6118IMS8#TRPBF
LT6118HMS8#TRPBF
PART MARKING*
LTGNS
LTGNS
PACKAGE DESCRIPTION
8-Lead Plastic MSOP
8-Lead Plastic MSOP
SPECIFIED TEMPERATURE RANGE
–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/
Lead Free Finish
TAPE AND REEL (MINI)
LT6118IDCB#PBF
LT6118HDCB#PBF
TAPE AND REEL
LT6118IDCB#TRPBF
LT6118HDCB#TRPBF
PART MARKING*
LGNT
LGNT
PACKAGE DESCRIPTION
8-Lead (2mm
×
3mm) Plastic DFN
SPECIFIED TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
8-Lead (2mm
×
3mm) Plastic DFN
TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on 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/
6118f
2
For more information
www.linear.com/LT6118
LT6118
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 = 10k, gain = 100, R
C
= 25.5k, C
L
= C
LC
= 2pF unless otherwise noted. (See Figure 2)
,
CONDITIONS
l
MIN
2.7
TYP
450
550
–100
MAX
60
650
950
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)
R
IN
= 500Ω
V
+
= 2.7V to 12V
V
+
= 12V to 60V, V
SENSE
= 5mV to 100mV, MS8 Package
V
+
= 12V to 60V, V
SENSE
= 5mV to 100mV, DFN Package
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
l
l
l
l
l
l
l
–0.2
–0.3
2.5
27
0
0
%
%
%
V
V
SENSELO Voltage (Note 8)
Output Swing High (V
+
to V
OUTA
)
BW
t
r
t
SETTLE
Signal Bandwidth
Input Step Response (to 50% of
Final Output Voltage)
Settling Time to 1%
0.2
0.5
1
140
500
500
2
V
V
MHz
kHz
ns
ns
µs
6118f
For more information
www.linear.com/LT6118
3
LT6118
elecTrical characTerisTics
SYMBOL
V
TH(R)
(Note 9)
V
HYS
V
OL
PARAMETER
Rising Input Threshold Voltage
V
HYS
= V
TH(R)
– V
TH(F)
Comparator Input Bias Current
Output Low Voltage
High to Low Propagation Delay
Output Fall Time
t
RESET
t
RPW
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 = 10k, gain = 100, R
C
= 25.5k, C
L
= C
LC
= 2pF unless otherwise noted. (See Figure 2)
,
CONDITIONS
V
+
= 2.7V to 60V
V
+
= 2.7V to 60V
V
INC
= 0V, V
+
= 60V
I
OUTC
= 500µA, V
+
= 2.7V
l
l
l
MIN
395
3
–50
TYP
400
10
60
3
0.5
0.08
0.5
MAX
405
15
150
220
UNITS
mV
mV
nA
mV
mV
µs
µs
µs
µs
µs
Reference and Comparator
5mV Overdrive
100mV Overdrive
2
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 LT6118I is guaranteed to meet specified performance from
–40°C to 85°C. LT6118H is guaranteed to meet specified performance
from –40°C to 125°C.
Note 4:
Supply current is specified with the comparator output high. When
the comparator output goes low the supply current will increase by 75µA
typically.
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:
The specified gain error does not include the effect 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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