LT6107
High Temperature High Side
Current Sense Amp in SOT-23
FEATURES
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DESCRIPTION
The LT
®
6107 is a versatile high side current sense ampli-
fier designed for operation over a wide temperature range.
Design flexibility is provided by the excellent device char-
acteristics: 250μV maximum offset and 40nA maximum
input bias current. Gain for each device is set by two re-
sistors and allows for accuracy better than 1%.
The LT6107 monitors current via the voltage across an
external sense resistor (shunt resistor). Internal circuitry
converts input voltage to output current, allowing for a
small sense signal on a high common mode voltage to
be translated into a ground referenced signal. The low DC
offset allows for monitoring very small sense voltages. As
a result, a small valued shunt resistor can be used, which
minimizes the power loss in the shunt.
The wide 2.7V to 44V input voltage range, high accuracy
and wide operating temperature range make the LT6107
ideal for automotive, industrial and power management
applications. The very low power supply current of the
LT6107 also makes it suitable for low power and battery
operated applications. For applications not requiring the
wide temperature range, see the LT6106.
Fully Tested at –55°C, 25°C and 150°C
Gain Configurable with Two Resistors
Low Offset Voltage: 250μV Maximum
Output Current: 1mA Maximum
Supply Range: 2.7V to 36V, 44V Absolute Maximum
Low Input Bias Current: 40nA Maximum
PSRR: 106dB Minimum
Low Supply Current: 65μA Typical, V
+
= 12V
Low Profile (1mm) ThinSOT
TM
Package
APPLICATIONS
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Current Shunt Measurement
Battery Monitoring
Power Management
Motor Control
Lamp Monitoring
Overcurrent and Fault Detection
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
TYPICAL APPLICATION
3V to 36V, 5A Current Sense with A
V
= 10
3V TO 36V
Measurement Accuracy vs Load Current
0.6
0.4
ACCURACY (% OF FULL SCALE)
100Ω
0.02Ω
+IN
LOAD
V
–
–IN
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
5A FULL SCALE
R
SENSE
= 0.02
R
OUT
= 1k
A
V
= 10
R
IN
= 100
V
+
= 3V
0
1
3
2
LOAD CURRENT (A)
4
5
6107 TA01b
TYPICAL PART, T
A
= 25°C
LT6107
–
V
+
OUT
1k
6107 TA01a
+
V
OUT
200mV/A
–1.2
6107fb
1
LT6107
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
+
to V
–
)..........................................44V
Input Voltage (+IN to V
–
) ............................................ V
+
(–IN to V
–
) ............................................ V
+
Input Current........................................................–10mA
Output Short-Circuit Duration .......................... Indefinite
Operating Temperature Range
(Note 2) ............................................. –55°C to 150°C
Specified Temperature Range
(Note 2) ............................................. –55°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
PIN CONFIGURATION
TOP VIEW
OUT 1
V
–
2
–IN 3
4 +IN
5 V
+
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
θ
JA
= 250°C/W
ORDER INFORMATION
Lead Free Finish
TAPE AND REEL (MINI)
LT6107MPS5#TRMPBF
TAPE AND REEL
LT6107MPS5#TRPBF
PART MARKING
LTDGZ
PACKAGE DESCRIPTION
5-Lead Plastic TSOT-23
TEMPERATURE RANGE
–55°C to 150°C
TEMPERATURE RANGE
–55°C to 150°C
Lead Based Finish
TAPE AND REEL (MINI)
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT6107MPS5#TRM
LT6107MPS5#TR
LTDGZ
5-Lead Plastic TSOT-23
TRM = 500 pieces.
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/
ELECTRICAL CHARACTERISTICS
SYMBOL
V
+
V
OS
ΔV
OS
/ΔT
I
B
I
OS
I
OUT
PSRR
V
SENSE(MAX)
A
V
Error
V
OUT(HIGH)
PARAMETER
Supply Voltage Range
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current (+IN)
Input Offset Current
Maximum Output Current
Power Supply Rejection Ratio
Input Sense Voltage Full Scale
Gain Error (Note 4)
Output Swing High
(Referred to V
+
)
The
●
denotes the specifications which apply over the full specified
operating temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 12V, V
+
= V
SENSE+
, R
IN
= 100Ω, R
OUT
= 10k, Gain = 100
unless otherwise noted. (Note 6)
CONDITIONS
●
MIN
2.7
TYP
150
MAX
36
250
400
40
130
UNITS
V
μV
μV
μV/°C
nA
nA
nA
mA
dB
V
V
SENSE
= 5mV
V
SENSE
= 5mV
V
+
= 12V, 36V
●
●
●
1
V
+
= 12V, 36V
(Note 3)
V
+
= 2.7V to 36V, V
SENSE
= 5mV
R
IN
= 500Ω (Notes 3, 7)
V
SENSE
= 500mV, R
IN
= 500Ω, R
OUT
= 10k, V
+
= 12.5V
V
SENSE
= 500mV, R
IN
= 500Ω, R
OUT
= 10k, V
+
= 36V
V
SENSE
= 120mV
●
●
●
●
●
●
1
1
106
0.5
–0.65
–0.45
–0.25
–0.14
0
0.1
1.2
1.4
%
%
V
V
6107fb
2
LT6107
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
Minimum Output Voltage
(Note 5)
CONDITIONS
V
SENSE
= 0mV, R
IN
= 100Ω, R
OUT
= 10k
V
SENSE
= 0mV, R
IN
= 500Ω, R
OUT
= 10k, V
+
= 12V, 36V
BW
t
r
I
S
Signal Bandwidth (–3dB)
I
OUT
= 1mA, R
IN
= 100Ω, R
OUT
= 5k
●
The
●
denotes the specifications which apply over the full specified
operating temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 12V, V
+
= V
SENSE+
, R
IN
= 100Ω, R
OUT
= 10k, Gain = 100
unless otherwise noted. (Note 6)
MIN
TYP
12
7
●
MAX
45
85
16
40
UNITS
mV
mV
mV
mV
kHz
μs
200
3.5
60
●
Input Step Response (to 50% of ΔV
SENSE
= 100mV Step, R
IN
= 100Ω, R
OUT
= 5k,
Output Step)
Rising Edge
Supply Current
V
+
= 2.7V, I
OUT
= 0μA, (V
SENSE
= –5mV)
V
+
= 12V, I
OUT
= 0μA, (V
SENSE
= –5mV)
V
+
= 36V, I
OUT
= 0μA, (V
SENSE
= –5mV)
85
120
95
125
100
135
μA
μA
μA
65
●
70
●
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. In addition to the Absolute Maximum Ratings, the
output current of the LT6107 must be limited to insure that the power
dissipation in the LT6107 does not allow the die temperature to exceed
150°C. See the applications information section “Power Dissipation
Considerations” for further information.
Note 2:
Junction temperatures greater than 125°C will promote
accelerated aging. The LT6107 has demonstrated typical life beyond
1000 hours at 150°C.
Note 3:
Guaranteed by the gain error test.
Note 4:
Gain error refers to the contribution of the LT6107 internal circuitry
and does not include errors in the external gain setting resistors.
Note 5:
The LT6107 output is an open collector current source. The
minimum output voltage scales directly with the ratio R
OUT
/10k.
Note 6:
V
SENSE+
is the voltage at the high side of the sense resistor,
R
SENSE
. See Figure 1.
Note 7:
V
SENSE(MAX)
is the maximum sense voltage for which the Electrical
Characteristics will apply. Higher voltages can affect performance but
will not damage the part provided that the output current of the LT6107
does not exceed the allowable power dissipation as described in Note 1.
TYPICAL PERFORMANCE CHARACTERISTICS
V
OS
Distribution
CHANGE IN INPUT OFFSET VOLTAGE (μV)
16
14
PERCENT OF UNITS (%)
12
10
8
6
4
2
0
–200
–120
120
–40 0 40
INPUT OFFSET VOLTAGE (μV)
200
6107 G23
Input Offset Voltage vs
Supply Voltage
70
60
50
40
30
20
10
0
–10
–20
–30
–40
–50
–60
–70
0
V
SENSE
= 5mV
R
IN
= 100Ω
R
OUT
= 10k
TYPICAL UNITS
600
500
INPUT OFFSET VOLTAGE (μV)
400
300
200
100
0
Input Offset Voltage vs
Temperature
V
SENSE
= 5mV
V
+
= 12V
R
IN
= 100Ω
R
OUT
= 10k
A
V
= 100
TYPICAL UNITS
V
+
= 12V
V
SENSE
= 5mV
R
IN
= 100Ω
R
OUT
= 10k
1068 UNITS
–100
–200
–300
5
10 15 20 25 30
SUPPLY VOLTAGE (V)
35
40
–400
–55 –35 –15 5 25 45 65 85 105 125 145 165
TEMPERATURE (°C)
6107 G03
6107 G02
6107fb
3
LT6107
TYPICAL PERFORMANCE CHARACTERISTICS
Gain Error vs Temperature
0.00
–0.05
–0.10
GAIN ERROR (%)
–0.15
–0.20
–0.25
–0.30
–0.35
V
+
= 2.7V
V
+
V
+
= 12V
= 5V
V
+
= 36V
POWER SUPPLY REJECTION RATIO (dB)
120
110
100
90
80
70
60
50
40
30
20
10
0
100
V
OUT
= 0.5V
V
OUT
= 1V
V
OUT
= 2V
1k
10k
100k
FREQUENCY (Hz)
1M
6107 G08
Power Supply Rejection Ratio
vs Frequency
POWER SUPPLY REJECTION RATIO (dB)
V
+
= 12.5V
A
V
= 20
R
IN
= 100Ω
R
OUT
= 2k
120
110
100
90
80
70
60
50
40
30
20
10
Power Supply Rejection Ratio
vs Frequency
V
+
= 12.5V
A
V
= 20
R
IN
= 500Ω
R
OUT
= 10k
V
OUT
= 1V
I
OUT
= 1mA
–0.40
R
OUT
= 1k
–0.45
–60 –40 –20 0 20 40 60 80 100 120 140 160 180
TEMPERATURE (°C)
6107 G04
0
100
V
OUT
= 2.5V
V
OUT
= 5V
V
OUT
= 10V
1k
10k
100k
FREQUENCY (Hz)
1M
6107 G06
Gain Error Distribution
24
22
20
PERCENT OF UNITS (%)
18
16
14
12
10
8
6
4
2
0
–0.60
–0.48
–0.36 –0.24
GAIN ERROR (%)
–0.12
0
6107 G24
Gain vs Frequency
45
40
35
30
25
20
15
10
5
0
–5
–10
–15
–20
–25
–30
1k
V
OUT
= 10V
V
OUT
= 2.5V
V
+
= 12.5V
A
V
= 100
R
IN
= 100Ω
R
OUT
= 10k
GAIN (dB)
45
40
35
30
25
20
15
10
5
0
–5
–10
–15
–20
–25
–30
Gain vs Frequency
V
OUT
= 10V
V
OUT
= 2.5V
V
+
= 12.5V
A
V
= 20
R
IN
= 500Ω
R
OUT
= 10k
GAIN (dB)
V
+
= 12.5V
V
SENSE
= 500mV
R
IN
= 500Ω
R
OUT
= 10k
11,072 UNITS
T
A
= 25°C
10k
100k
1M
FREQUENCY (Hz)
10M
6107 G09
1k
10k
100k
1M
FREQUENCY (Hz)
10M
6107 G14
Input Bias Current vs Supply
Voltage
300
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0
0
V
SENSE
= 5mV
R
IN
= 100Ω
V
SENSE
20mV/DIV
Step Response 0mV to 10mV
(R
IN
= 100Ω)
V
SENSE
20mV/DIV
Step Response 10mV to 20mV
(R
IN
= 100Ω)
INPUT BIAS CURRENT (nA)
T
A
= –55°C
T
A
= –40°C
T
A
= 25°C
T
A
= 70°C
T
A
= 125°C
T
A
= 150°C
T
A
= 175°C
V
OUT
500mV/DIV
V
OUT
500mV/DIV
0V
A
V
= 100
V
OUT
= 0V TO 1V
R
OUT
= 10k
V
+
= 12V
5μs/DIV
6107 G10
0V
A
V
= 100
V
OUT
= 1V TO 2V
R
OUT
= 10k
V
+
= 12V
5μs/DIV
6107 G11
5
10 15 20 25 30 35 40 45 50
SUPPLY VOLTAGE (V)
6107 G05
6107fb
4
LT6107
TYPICAL PERFORMANCE CHARACTERISTICS
Step Response 0mV to 100mV
(R
IN
= 100Ω)
V
SENSE
200mV/DIV
V
SENSE
200mV/DIV
Step Response 10mV to 100mV
(R
IN
= 100Ω)
V
SENSE
100mV/DIV
Step Response 50mV to 100mV
(R
IN
= 500Ω)
V
OUT
2V/DIV
V
OUT
2V/DIV
V
OUT
500mV/DIV
0V
A
V
= 100
5μs/DIV
V
OUT
= 0V TO 10V
R
OUT
= 10k
V
+
= 12V
6107 G12
0V
A
V
= 100
5μs/DIV
V
OUT
= 1V TO 10V
R
OUT
= 10k
V
+
= 12V
6107 G13
0V
A
V
= 20
V
OUT
= 1V TO 2V
R
OUT
= 10k
V
+
= 12V
5μs/DIV
6107 G15
Step Response 0mV to 50mV
(R
IN
= 500Ω)
V
SENSE
100mV/DIV
V
SENSE
1V/DIV
Step Response 50mV to 500mV
(R
IN
= 500Ω)
V
SENSE
1V/DIV
Step Response 0mV to 500mV
(R
IN
= 500Ω)
V
OUT
2V/DIV
V
OUT
500mV/DIV
0V
A
V
= 20
V
OUT
= 0V TO 1V
R
OUT
= 10k
V
+
= 12V
5μs/DIV
6107 G16
V
OUT
2V/DIV
0V
A
V
= 20
5μs/DIV
V
OUT
= 1V TO 10V
R
OUT
= 10k
V
+
= 12V
6107 G17
0V
A
V
= 20
5μs/DIV
V
OUT
= 0V TO 10V
R
OUT
= 10k
V
+
= 12V
6107 G18
Output Voltage Swing vs
Temperature
11.15
11.10
OUTPUT VOLTAGE (V)
11.05
11.00
10.95
10.90
10.85
10.80
–60 –40 –20 0 20 40 60 80 100 120 140 160 180
TEMPERATURE (°C)
6107 G07
Output Voltage vs Input Sense
Voltage (0mV ≤ V
SENSE
≤ 10mV)
1100
1000
900
800
V
OUT
(mV)
700
600
500
400
300
200
100
0
0
1
2
3
4 5 6 7
V
SENSE
(mV)
8
9
10
V
+
= 12V
A
V
= 100
R
IN
= 100Ω
R
OUT
= 10k
V
OUT
(mV)
220
200
180
160
140
120
100
80
60
40
20
0
Output Voltage vs Input Sense
Voltage (0mV ≤ V
SENSE
≤ 10mV)
V
+
= 12V
A
V
= 20
R
IN
= 500Ω
R
OUT
= 10k
V
+
= 12V
A
V
= 100
R
IN
= 100Ω
R
OUT
= 10k
V
SENSE
= 120mV
0
1
2
3
4 5 6 7
V
SENSE
(mV)
8
9
10
6107 G19
6107 G20
6107fb
5
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