LT6376
±230V Common Mode
Voltage G = 10 Difference Amplifier
FEATURES
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DESCRIPTION
The
LT
®
6376
is a gain of 10 difference amplifier which
combines excellent DC precision, a very high input
common mode range and a wide supply voltage range.
It includes a precision op amp and a highly-matched
thin film resistor network. It features excellent CMRR,
extremely low gain error and extremely low gain drift.
Comparing the LT6376 to existing difference amplifiers
with high common mode voltage range, the gain of 10
and selectable resistor divider ratios of the LT6376 offer
superior system performance by allowing the user to
achieve low input referred noise with maximum preci-
sion and speed.
The op amp at the core of the LT6376 has Over-The-Top
®
protected inputs which allow for robust operation in envi-
ronments with unpredictable voltage conditions. See the
Applications Information section for more details.
The LT6376 is specified over the –40°C to 125°C tem-
perature range and is available in space-saving MSOP16
and DFN14 packages.
All registered trademarks and trademarks are the property of their respective owners.
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±230V Common Mode Voltage Range
105nV/√Hz Input Referred Noise (Resistor
Divider = 3.1)
90dB Minimum CMRR
0.0075% (75ppm) Maximum Gain Error
1ppm/°C Maximum Gain Error Drift
2ppm Maximum Gain Nonlinearity
Wide Supply Voltage Range: 3.3V to 50V
Rail-to-Rail Output
350µA Supply Current
Selectable Internal Resistor Divider Ratio
200µV Maximum Input Offset Voltage
300kHz –3dB Bandwidth (Resistor Divider = 3.1)
160kHz –3dB Bandwidth (Resistor Divider = 10.3)
–40°C to 125°C Specified Temperature Range
Low Power Shutdown: 20μA (DFN Package Only)
Space-Saving MSOP and DFN Packages
APPLICATIONS
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High Side or Low Side Current Sensing
Bidirectional Wide Common Mode Range Current Sensing
High Voltage to Low Voltage Level Translation
Precision Difference Amplifier
Replacement for Isolation Circuits
TYPICAL APPLICATION
Precision Wide Voltage Range, Bidirectional Current Monitor
25V
–REFA
19k
V
SOURCE+
= –230V TO 230V
–IN
1Ω
Typical Distribution of CMRR
120
638 UNITS
FROM TWO RUNS
100 DF14(12)
NUMBER OF UNITS
80
60
40
20
0
–40 –30 –20 –10 0
10 20
CMRR (µV/V = ppm)
V
S
= ±25V
V
IN
= ±230V
DIV = 10.3
–REFB
38k
–REFC
23.75k
760k
V
+
76k
R
SENSE
–
+
R
C
1Ω
OUT
+IN
76k
V
OUT
= ±10mV/mA
LOAD
19k
+REFA
38k
+REFB
23.75k
+REFC
760k
SHDN
V
–
–25V
REF
30
40
6376 TA01a
6376 TA01b
6376f
For more information
www.linear.com/LT6376
1
LT6376
ABSOLUTE MAXIMUM RATINGS
Supply Voltages
(V
+
to V
–
) ..............................................................60V
+IN, –IN, (Note 2)
Each Input.........................................................±240V
Differential ........................................................±480V
+REFA, –REFA, +REFB, –REFB, +REFC, –REFC,
REF,
SHDN
(Note 2) ................ (V
+
+ 0.3V) to (V
–
–0.3V)
Output Current (Continuous) (Note 6) ....................50mA
(Note 1)
Output Short-Circuit Duration (Note 3) Thermally Limited
Temperature Range (Notes 4, 5)
LT6376I ...............................................–40°C to 85°C
LT6376H ............................................ –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
MSOP Lead Temperature (Soldering, 10 sec)........ 300°C
PIN CONFIGURATION
TOP VIEW
+IN
+REFA
+REFB
+REFC
REF
SHDN
1
3
4
5
6
7
15 V
–
14 –IN
12 –REFA
11 –REFB
10 –REFC
9
8
V
+
OUT
TOP VIEW
+IN 1
+REFA 3
+REFB
+REFC
REF
V
–
5
6
7
8
16 –IN
14 –REFA
12
11
10
9
–REFB
–REFC
V
+
OUT
DF PACKAGE
14(12)-LEAD (4mm
×
4mm) PLASTIC DFN
T
JMAX
= 150°C,
q
JA
= 43°C/W,
q
JC
= 4°C/W
EXPOSED PAD (PIN 15) IS V
–
, MUST BE SOLDERED TO PCB
MS PACKAGE
VARIATION: MS16 (12)
16-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
q
JA
= 130°C/W
ORDER INFORMATION
TUBE
LT6376IDF#PBF
LT6376HDF#PBF
LT6376IMS#PBF
LT6376HMS#PBF
TAPE AND REEL
LT6376IDF#TRPBF
LT6376HDF#TRPBF
LT6376IMS#TRPBF
LT6376HMS#TRPBF
http://www.linear.com/product/LT6376#orderinfo
PART MARKING*
6376
6376
6376
6376
PACKAGE DESCRIPTION
14-Lead (4mm × 4mm) Plastic DFN
14-Lead (4mm × 4mm) Plastic DFN
16-Lead Plastic MSOP
16-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
*The temperature grade is identified by a label on the shipping container.
Consult ADI Marketing for parts specified with wider operating temperature ranges. Parts ending with PBF are RoHS and WEEE compliant.
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/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
6376f
2
For more information
www.linear.com/LT6376
LT6376
ELECTRICAL CHARACTERISTICS
The
l
denotes the specifications which apply over the full operating
temperature range, –40°C < T
A
< 85°C for I-grade parts, –40°C < T
A
< 125°C for H-grade parts, otherwise specifications are at T
A
= 25°C,
V
+
= 15V, V
–
= –15V, V
CM
= V
OUT
= V
REF
= 0V. V
CMOP
is the common mode voltage of the internal op amp. For Resistor Divider
Ratio = 3.1, ±REFA = ± REFC = OPEN, ±REFB = 0V. For Resistor Divider Ratio = 8.3, ±REFA = ±REFC = 0V, ±REFB = OPEN. For Resistor
Divider Ratio = 10.3, ±REFA = ±REFB = ±REFC = 0V.
PARAMETER
Gain
Gain Error,
MS16 Package
Gain Error,
DF14 Package
Gain Drift vs Temperature
(Note 6)
Gain Nonlinearity
Input Offset Voltage
CONDITIONS
V
OUT
= ±10V
V
OUT
= ±10V
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SYMBOL
G
∆G
∆G
∆G/∆T
GNL
V
OS
MIN
TYP
10
±0.002
±0.002
MAX
±0.0075
±0.0085
±0.0085
±0.0095
±1
±2
±3
200
600
500
1600
600
2000
4
12
65
50
49
176
UNITS
V/V
%
%
%
%
ppm/°C
ppm
ppm
µV
µV
µV
µV
µV
µV
µV/°C
µV/°C
kΩ
kΩ
kΩ
kΩ
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
V
OUT
= ±10V
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V
OUT
= ±10V
V
OUT
= ±10V
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±0.2
±1
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V
–
< V
CMOP
< V
+
–1.75V
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 8.3
Resistor Divider Ratio = 8.3
Resistor Divider Ratio = 10.3
Resistor Divider Ratio = 10.3
V
–
< V
CMOP
< V
+
–1.75V
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 10.3
Common Mode
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 8.3
Resistor Divider Ratio = 10.3
Differential
Resistor Divider Ratio = 3.1, V
CM
= ±28V
Resistor Divider Ratio = 8.3, V
CM
= ±28V
Resistor Divider Ratio = 10.3, V
CM
= ±28V
50
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120
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160
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∆V
OS
/∆T
R
IN
Input Offset Voltage Drift
(Note 6)
Input Impedance (Note 8)
1.5
5
47
36
35
128
90
88
90
88
90
88
88
86
88
86
88
86
90
86
90
89
–230
105
98
96
120
110
107
105
245
56
43
42
152
98
98
98
95
95
95
96
96
CMRR
Common Mode Rejection Ratio,
MS16 Package
CMRR
Common Mode Rejection Ratio,
DF14 Package
Resistor Divider Ratio = 3.1, V
CM
= ±28V
Resistor Divider Ratio = 8.3, V
CM
= ±28V
Resistor Divider Ratio = 10.3, V
CM
= ±28V
Resistor Divider Ratio = 10.3, V
CM
= ±150V,
V
S
= ±25V, T
A
= –40°C to 125°C
Resistor Divider Ratio = 10.3, V
CM
= ±230V,
V
S
= ±25V, T
A
= –40°C to 85°C
V
CM
PSRR
Input Voltage Range (Note 7)
Power Supply Rejection Ratio
(Input Referred)
V
S
= ±1.65V to ±25V, V
CM
= V
OUT
= Mid-Supply
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 8.3
Resistor Divider Ratio = 10.3
f = 1kHz
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 10.3
230
V
dB
dB
dB
nV/√Hz
nV/√Hz
6376f
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Input Referred Noise Voltage
Density
For more information
www.linear.com/LT6376
3
LT6376
ELECTRICAL CHARACTERISTICS
The
l
denotes the specifications which apply over the full operating
temperature range, –40°C < T
A
< 85°C for I-grade parts, –40°C < T
A
< 125°C for H-grade parts, otherwise specifications are at T
A
= 25°C,
V
+
= 15V, V
–
= –15V, V
CM
= V
OUT
= V
REF
= 0V. V
CMOP
is the common mode voltage of the internal op amp. For Resistor Divider
Ratio = 3.1, ±REFA = ± REFC = OPEN, ±REFB = 0V. For Resistor Divider Ratio = 8.3, ±REFA = ±REFC = 0V, ±REFB = OPEN. For Resistor
Divider Ratio = 10.3, ±REFA = ±REFB = ±REFC = 0V.
PARAMETER
Input Referred Noise Voltage
CONDITIONS
f = 0.1Hz to 10Hz
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 10.3
No Load
I
SINK
= 5mA
No Load
I
SOURCE
= 5mA
50Ω to V
+
50Ω to V
–
∆V
OUT
= ±5V
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 8.3
Resistor Divider Ratio = 10.3
Resistor Divider Ratio = 3.1
0.01%, ∆V
OUT
= 10V
0.1%, ∆V
OUT
= 10V
0.01%, ∆V
CM
= 10V, ∆V
DIFF
= 0V
Resistor Divider Ratio = 10.3
0.01%, ∆V
OUT
= 10V
0.1%, ∆V
OUT
= 10V
0.01%, ∆V
CM
= 10V, ∆V
DIFF
= 0V
V
S
t
ON
V
IL
V
IH
I
SHDN
I
S
Supply Voltage
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SYMBOL
MIN
TYP
4
10
5
280
5
400
MAX
UNITS
µV
P-P
µV
P-P
V
OL
V
OH
I
SC
SR
BW
Output Voltage Swing Low
(Referred to V
–
)
Output Voltage Swing High
(Referred to V
+
)
Short-Circuit Output Current
Slew Rate
Small Signal –3dB Bandwidth
50
500
20
750
mV
mV
mV
mV
mA
mA
V/µs
kHz
kHz
kHz
µs
µs
µs
µs
µs
µs
10
10
2.2
28
30
4.1
300
190
160
41
26
15
26
16
5
t
S
Settling Time
3
3.3
16
50
50
–2.5
V
V
µs
V
V
Turn-On Time
SHDN
Input Logic Low
(Referred to V
+
)
SHDN
Input Logic High
(Referred to V
+
)
SHDN
Pin Current
Supply Current
Active, V
SHDN
≥ V
+
–1.2V
Active, V
SHDN
≥ V
+
–1.2V
Shutdown, V
SHDN
≤ V
+
–2.5V
Shutdown, V
SHDN
≤ V
+
–2.5V
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–1.2
–10
350
20
–15
400
600
25
70
µA
µA
µA
µA
µA
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6376f
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For more information
www.linear.com/LT6376
LT6376
ELECTRICAL CHARACTERISTICS
The
l
denotes the specifications which apply over the full operating
temperature range, –40°C < T
A
< 85°C for I-grade parts, –40°C < T
A
< 125°C for H-grade parts, otherwise specifications are at T
A
= 25°C,
V
+
= 5V, V
–
= 0V, V
CM
= V
OUT
= V
REF
= Mid-Supply. V
CMOP
is the common mode voltage of the internal op amp. For Resistor
Divider Ratio = 3.1, ±REFA = ±REFC = OPEN, ±REFB = Mid-Supply. For Resistor Divider Ratio = 8.3, ±REFA = ±REFC = Mid-Supply,
±REFB = OPEN. For Resistor Divider Ratio = 10.3, ±REFA = ±REFB = ±REFC = Mid-Supply.
PARAMETER
Gain
Gain Error,
MS16 Package
Gain Error,
DF14 Package
Gain Drift vs Temperature
(Note 6)
Gain Nonlinearity
Input Offset Voltage
CONDITIONS
V
OUT
= 1V to 4V
V
OUT
= 1V to 4V
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SYMBOL
G
∆G
∆G
∆G/∆T
GNL
V
OS
MIN
TYP
10
±0.002
±0.002
MAX
±0.01
±0.012
±0.012
±0.013
±1
UNITS
V/V
%
%
%
%
ppm/°C
ppm
V
OUT
= 1V to 4V
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V
OUT
= 1V to 4V
V
OUT
= 1V to 4V
0 < V
CMOP
< V
+
–1.75V
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 8.3
Resistor Divider Ratio = 8.3
Resistor Divider Ratio = 10.3
Resistor Divider Ratio = 10.3
0 < V
CMOP
< V
+
–1.75V
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 10.3
Common Mode
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 8.3
Resistor Divider Ratio = 10.3
Differential
Resistor Divider Ratio = 3.1
V
CM
= –5.25V to +4.825V
Resistor Divider Ratio = 8.3
V
CM
= –18.25V to +8.725V
Resistor Divider Ratio = 10.3
V
CM
= –23.25V to +10.225V
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±0.2
±1
50
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120
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160
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200
600
500
1600
600
2000
4
12
65
50
49
176
µV
µV
µV
µV
µV
µV
µV/°C
µV/°C
kΩ
kΩ
kΩ
kΩ
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
nV/√Hz
nV/√Hz
µV
P-P
µV
P-P
∆V
OS
/∆T
R
IN
Input Offset Voltage Drift
(Note 6)
Input Impedance (Note 8)
1.5
5
47
36
35
128
90
87
90
87
90
87
86
85
86
85
86
85
105
98
96
56
43
42
152
97
97
97
94
94
94
CMRR
Common Mode Rejection Ratio,
MS16 Package
CMRR
Common Mode Rejection Ratio,
DF14 Package
Resistor Divider Ratio = 3.1
V
CM
= –5.25V to +4.825V
Resistor Divider Ratio = 8.3
V
CM
= –18.25V to +8.725V
Resistor Divider Ratio = 10.3
V
CM
= –23.25V to +10.225V
PSRR
Power Supply Rejection Ratio
(Input Referred)
V
S
= ±1.65V to ±25V, V
CM
= V
OUT
= Mid-Supply
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 8.3
Resistor Divider Ratio = 10.3
f = 1kHz
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 10.3
f = 0.1Hz to 10Hz
Resistor Divider Ratio = 3.1
Resistor Divider Ratio = 10.3
No Load
I
SINK
= 5mA
No Load
I
SOURCE
= 5mA
120
110
107
105
245
4
10
e
ni
Input Referred Noise Voltage
Density
Input Referred Noise Voltage
V
OL
V
OH
Output Voltage Swing Low
(Referred to V
–
)
Output Voltage Swing High
(Referred to V
+
)
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5
280
5
400
50
500
20
750
mV
mV
mV
mV
6376f
For more information
www.linear.com/LT6376
5
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