LT6110CDD#TRPBF [Linear]
IC SPECIALTY ANALOG CIRCUIT, Analog IC:Other;型号: | LT6110CDD#TRPBF |
厂家: | Linear |
描述: | IC SPECIALTY ANALOG CIRCUIT, Analog IC:Other |
文件: | 总16页 (文件大小:325K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LT6100
Precision, Gain Selectable
High Side Current Sense
Amplifier
FeaTures
DescripTion
The LT®6100 is a complete micropower, precision, high
side current sense amplifier. The LT6100 monitors unidi-
rectional currents via the voltage across an external sense
resistor. Fixed gains of 10, 12.5, 20, 25, 40, 50V/V are
obtained by simply strapping or floating two gain select
pins. Gain accuracy is better than 0.5% for all gains.
n
Input Offset Voltage: 300µV (Max)
n
Sense Inputs Up to 48V
n
0.5% Gain Accuracy
Pin Selectable Gain: 10, 12.5, 20, 25, 40, 50V/V
Separate Power Supply: 2.7V to 36V
Operating Current: 60µA
Sense Input Current (V Powered Down): 1nA
Reverse Battery Protected to –48V
Buffered Output
n
n
n
n
CC
TheLT6100senseinputshaveavoltagerangethatextends
from 4.1V to 48V, and can withstand a differential voltage
of the full supply. This makes it possible to monitor the
voltage across a MOSFET switch or a fuse. The part can
also withstand a reverse battery condition on the inputs.
n
n
n
n
n
Noise Filtering Input
–40°C to 125°C Operating Temperature Range
Available in 8-Lead DFN and MSOP Packages
Input offset is a low 300µV. CMRR and PSRR are in ex-
cess of 105dB, resulting in a wide dynamic range. A filter
pin is provided to easily implement signal filtering with a
single capacitor.
applicaTions
n
Battery Monitoring
n
Fuse Monitoring
The LT6100 has a separate supply input, which operates
n
Portable and Cellular Phones
Portable Test/Measurement Systems
from 2.7V to 36V and draws only 60µA. When V is
CC
n
powered down, the sense pins are biased off. This pre-
vents loading of the monitored circuit, irrespective of the
sense voltage. The LT6100 is available in an 8-lead DFN
and MSOP package.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Over-The-Top are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Typical applicaTion
0A to 33A High Side Current Monitor with 12kHz Frequency Rolloff
Input Offset Voltage
vs VS Sense Input Voltage
1.5
4.4V TO 48V
SUPPLY
3V
V
V
= 100mV
SENSE
2
7
6
= 3V
CC
A
1.0
T
= 25°C
V
A4
A2
LT6100
+
CC
0.5
0
V
S
8
1
V
OUT
5
R
V
= 2.5V
OUT
SENSE
3mΩ
I
= 33A
SENSE
–
V
S
–0.5
–1.0
–1.5
V
4
EE
FIL
3
LOAD
6100 TA01a
220pF
CONFIGURED FOR GAIN = 25V/V
0
5
10 15 20 25 30 35 40 45 50
V
SENSE INPUT VOLTAGE (V)
S
6100 TA01b
6100fc
1
LT6100
absoluTe MaxiMuM raTings (Notes 1, 2)
Differential Sense Voltage...................................... 48V
Specified Temperature Range (Note 5)
+
–
Total V , V to V ............................................... 48V
LT6100C ............................................–40°C to 85°C
LT6100I ..............................................–40°C to 85°C
LT6100H .......................................... –40°C to 125°C
Storage Temperature Range ...........................................
DFN.................................................... –65°C to 125°C
MSOP ................................................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
S
S
EE
Total V Supply Voltage from V ......................... 36V
CC
EE
Output Voltage ............................... (V ) to (V + 36V)
EE
EE
Output Short-Circuit Duration (Note 3) ........ Continuous
Operating Temperature Range (Note 4)
LT6100C ............................................–40°C to 85°C
LT6100I ..............................................–40°C to 85°C
LT6100H .......................................... –40°C to 125°C
MSOP .............................................................. 300°C
package/orDer inForMaTion
TOP VIEW
TOP VIEW
–
+
V
1
2
3
4
8
7
6
5
V
S
S
–
+
V
V
1
2
3
4
8 V
S
S
V
A4
A2
V
CC
7 A4
6 A2
5 V
9
CC
FIL
EE
FIL
V
OUT
V
EE
OUT
MS8 PACKAGE
8-LEAD PLASTIC MSOP
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
T
= 150°C, θ = 250°C/W
JA
JMAX
T
= 125°C, θ = 43°C/W
JA
JMAX
EXPOSED PAD (PIN 9) IS V , MUST BE SOLDERED TO PCB
EE
Order part number
dd part marking*
Order part number
mS part marking*
Lt6110Cdd
Lt6110idd
Lt6100hdd
Lbmw
Lbmw
Lbmw
Lt6100CmS8
Lt6100imS8
Lt6100hmS8
Ltbmv
Ltbmv
Ltbmv
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grades are identified by a label on the shipping
container.
elecTrical characTerisTics
The l denotes specifications which apply over the temperature range 0°C ≤ TA ≤ 70°C (LT6100C), otherwise specifications are
TA = 25°C. VCC = 5V, VEE = 0V, VS+ = VCC + 1.4V unless otherwise specified. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
–
+
l
V
V
, V
Sense Amplifier Supply Voltage
Input Sense Voltage Full Scale
V
= 2.7V
4.1
48
V
S
S
CC
+
+
–
–
l
l
V
SENSE
V
SENSE
= V – V , V = 3V, A = 10V/V
= V – V , V = 5V, A = 10V/V
110
300
mV
mV
SENSE
S
S
S
S
CC
CC
V
V
V
Input Offset Voltage (MS Package)
Input Offset Voltage (DD Package)
I
= 0
–300
–500
80
80
300
500
µV
µV
OS
OUT
l
I
= 0
–350
–550
350
550
µV
µV
OUT
l
l
V
TC
Temperature Coefficient of V
(Note 6)
0.5
3
µV/°C
OS
OS
6100fc
2
LT6100
elecTrical characTerisTics
The l denotes specifications which apply over the temperature range 0°C ≤ TA ≤ 70°C (LT6100C), otherwise specifications are
TA = 25°C. VCC = 5V, VEE = 0V, VS+ = VCC + 1.4V unless otherwise specified. (Note 5)
SYMBOL
PARAMETER
Gain, V /V
CONDITIONS
MIN
TYP
MAX
UNITS
A
V
V
= 50mV to 80mV, A = 10V/V
SENSE V
OUT SENSE
LT6100MS8
LT6100DD8
9.95
9.94
9.90
10.05
10.06
10.10
V/V
V/V
V/V
l
l
V = 48V, V
= 50mV to 80mV, A = 10V/V
9.90
10.10
V/V
S
SENSE
V
Output Voltage Gain Error (Note 7)
V
= 50mV to 80mV,
SENSE
V
A = 10, 12.5, 20, 25, 40, 50V/V
LT6100MS8
LT6100DD8
–0.5
–0.6
–1.0
0.5
0.6
1.0
%
%
%
l
l
V = 48V, V
V
= 50mV to 80mV,
–1.0
1.0
%
S
SENSE
A = 10, 12.5, 20, 25, 40, 50V/V
V CMRR
V Sense Input Common Mode
V
= 50mV, V = 2.7V, V = 4.1V to 36V
105
100
120
120
dB
dB
S
S
SENSE
SENSE
CC
S
l
Rejection Ratio
V
CC
PSRR
V
CC
Supply Rejection Ratio
V
= 50mV, V = 36V, V = 3V to 30V
105
100
120
120
dB
dB
S
CC
l
l
V
CC
Supply Voltage V
Bandwidth
2.7
36
V
CC
BW
A = 10V/V, f = –3dB, V = 15V
100
20
150
50
kHz
kHz
V
O
CC
A = 50V/V, f = –3dB, V = 15V
V
O
CC
t
I
I
Output Settling to 1% Final Value
Sense Input Current
V
V
V
V
= 10mV to 100mV
15
4.5
60
µs
µA
µA
S
SENSE
SENSE
SENSE
+
–
l
l
, I
= 0V
= 0V
10
S (O) S (O)
CC(O)
V
Supply Current
130
CC
SR
Slew Rate (Note 8)
= 15V, V
= 26mV to 380mV, A = 50V/V
0.03
0.02
0.05
0.05
V/µs
V/µs
CC
SENSE
V
l
+
–
I
Short-Circuit Current
I
I
, I
8
15
60
mA
V
SC
SC SC
S(TOTAL)
l
l
Reverse V Supply
= –200µA, V = Open
50
S
CC
V
V
Minimum Output Voltage
V
V
= 0V, No Load
= V – V = –100mV, A = 50V/V, No Load
15
15
30
25
mV
mV
O(MIN)
SENSE
SENSE
+
–
S
S
V
l
l
l
l
Output High (Referred to V
)
CC
A = 50V/V, V
= 100mV, I = 0
75
85
125
175
125
150
250
400
mV
mV
mV
mV
O(MAX)
V
SENSE
L
V
V
V
= 100mV, I = 100µA
SENSE
SENSE
SENSE
L
L
L
= 100mV, I = 500µA
= 100mV, I = 1mA
+
–
l
I
S
, I (Off) Sense Input Current (Power Down)
V
CC
= 0V, V = 48V, V = 0V
SENSE
0.001
1
µA
S
S
The l denotes specifications which apply over the temperature range –40°C ≤ TA ≤ 85°C (LT6100I), otherwise specifications are
TA = 25°C. VCC = 5V, VEE = 0V, VS+ = VCC + 1.4V unless otherwise specified. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
–
+
l
V
V
, V
Sense Amplifier Supply Voltage
Input Sense Voltage Full Scale
V
= 2.7V
4.1
48
V
S
S
CC
+
+
–
–
l
l
V
SENSE
V
SENSE
= V – V , V = 3V, A = 10V/V
= V – V , V = 5V, A = 10V/V
110
300
mV
mV
SENSE
S
S
S
S
CC
CC
V
V
V
Input Offset Voltage (MS Package)
Input Offset Voltage (DD Package)
I
= 0
–300
–550
80
80
300
550
µV
µV
OS
OUT
l
I
= 0
–350
–600
350
600
µV
µV
OUT
l
l
V
TC
Temperature Coefficient of V
(Note 6)
0.5
3
µV/°C
OS
OS
6100fc
3
LT6100
elecTrical characTerisTics
The l denotes specifications which apply over the temperature range –40°C ≤ TA ≤ 85°C (LT6100I), otherwise specifications are
TA = 25°C. VCC = 5V, VEE = 0V, VS+ = VCC + 1.4V unless otherwise specified. (Note 5)
SYMBOL
PARAMETER
Gain, V /V
CONDITIONS
MIN
TYP
MAX
UNITS
A
V
= 50mV to 80mV, A = 10V/V
SENSE V
V
OUT SENSE
LT6100MS8
LT6100DD8
9.95
9.94
9.90
10.05
10.06
10.10
V/V
V/V
V/V
l
l
V = 48V, V
= 50mV to 80mV, A = 10V/V
9.90
10.10
V/V
S
SENSE
V
Output Voltage Gain Error (Note 7)
V
V
= 50mV to 80mV,
SENSE
A = 10, 12.5, 20, 25, 40, 50V/V
LT6100MS8
LT6100DD8
–0.5
–0.6
–1.0
0.5
0.6
1.0
%
%
%
l
l
V = 48V, V
V
= 50mV to 80mV,
–1.0
1.0
%
S
SENSE
A = 10, 12.5, 20, 25, 40, 50V/V
V CMRR
V Sense Input Common Mode
V
= 50mV, V = 2.7V, V = 4.1V to 36V
105
100
120
120
dB
dB
S
S
SENSE
SENSE
CC
S
l
Rejection Ratio
V
V
PSRR
V
CC
Supply Rejection Ratio
V
= 50mV, V = 36V, V = 3V to 30V
105
100
120
120
dB
dB
CC
S
CC
l
l
Supply Voltage V
Bandwidth
2.7
36
V
CC
CC
BW
A = 10V/V, f = –3dB, V = 15V
100
20
150
50
kHz
kHz
V
O
CC
A = 50V/V, f = –3dB, V = 15V
V
O
CC
t
I
I
Output Settling to 1% Final Value
Sense Input Current
Supply Current
V
V
V
V
= 10mV to 100mV
15
4.5
60
µs
µA
µA
S
SENSE
SENSE
SENSE
+
–
l
l
, I
= 0V
= 0V
10
S (O) S (O)
CC(O)
145
SR
Slew Rate (Note 8)
= 15V, V
= 26mV to 380mV, A = 50V/V
0.03
0.02
0.05
0.05
V/µs
V/µs
CC
SENSE
V
l
+
–
I
Short-Circuit Current
I
I
, I
8
15
60
mA
V
SC
SC SC
S(TOTAL)
l
l
Reverse V Supply
= –200µA, V = Open
50
S
CC
V
Minimum Output Voltage
V
V
= 0V, No Load
= V – V = –100mV, A = 50V/V, No
15
15
30
25
mV
mV
O(MIN)
O(MAX)
SENSE
SENSE
Load
+
–
S
S
V
l
l
l
l
V
Output High (Referred to V
)
A = 50V/V, V
= 100mV, I = 0
75
85
125
175
125
150
250
400
mV
mV
mV
mV
CC
V
SENSE
L
V
V
V
= 100mV, I = 100µA
SENSE
SENSE
SENSE
L
L
L
= 100mV, I = 500µA
= 100mV, I = 1mA
+
–
l
I
S
, I (Off) Sense Input Current (Power Down)
V
CC
= 0V, V = 48V, V = 0V
SENSE
0.001
1
µA
S
S
The l denotes specifications which apply over the temperature range –40°C ≤ TA ≤ 125°C (LT6100H), otherwise specifications are
TA = 25°C. VCC = 5V, VEE = 0V, VS+ = VCC + 1.4V unless otherwise specified. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
–
+
l
V
V
, V
Sense Amplifier Supply Voltage
Input Sense Voltage Full Scale
V
= 2.7V
4.1
48
V
S
S
CC
+
+
–
–
l
l
V
V
= V – V , V = 3V, A = 10V/V
110
300
mV
mV
SENSE
SENSE
SENSE
S
S
S
S
CC
CC
V
= V – V , V = 5V, AV = 10V/V
V
Input Offset Voltage (MS Package)
Input Offset Voltage (DD Package)
I
= 0
–300
–600
80
80
300
600
µV
µV
OS
OUT
l
I
= 0
–350
–650
350
650
µV
µV
OUT
l
l
V
OS
TC
Temperature Coefficient of V
(Note 6)
0.5
5
µV/°C
OS
6100fc
4
LT6100
elecTrical characTerisTics
The l denotes specifications which apply over the temperature range –40°C ≤ TA ≤ 125°C (LT6100H), otherwise specifications are
TA = 25°C. VCC = 5V, VEE = 0V, VS+ = VCC + 1.4V unless otherwise specified. (Note 5)
SYMBOL
PARAMETER
Gain, V /V
CONDITIONS
MIN
TYP
MAX
UNITS
A
V
= 50mV to 80mV, A = 10V/V
SENSE V
V
OUT SENSE
LT6100MS8
LT6100DD8
9.95
9.94
9.90
10.05
10.06
10.10
V/V
V/V
V/V
l
l
V = 48V, V
= 50mV to 80mV, A = 10V/V
9.90
10.10
V/V
S
SENSE
V
Output Voltage Gain Error (Note 7)
V
= 50mV to 80mV,
SENSE
AV = 10, 12.5, 20, 25, 40, 50V/V
LT6100MS8
–0.5
–0.6
–1.0
0.5
0.6
1.0
%
%
%
LT6100DD8
l
l
V = 48V, V
V
= 50mV to 80mV,
–1.0
1.0
%
S
SENSE
A = 10, 12.5, 20, 25, 40, 50V/V
V CMRR
V Sense Input Common Mode
V
= 50mV, V = 2.7V, V = 4.1V to 36V
105
100
120
120
dB
dB
S
S
SENSE
SENSE
CC
S
l
Rejection Ratio
V
CC
PSRR
V
CC
Supply Rejection Ratio
V
= 50mV, V = 36V, V = 3V to 30V
105
95
120
120
dB
dB
S
CC
l
l
V
CC
Supply Voltage V
Bandwidth
2.7
36
V
CC
BW
A = 10V/V, f = –3dB, V = 15V
A = 50V/V, f = –3dB, V = 15V
100
20
150
50
kHz
kHz
V
V
O
CC
O
CC
t
I
I
Output Settling to 1% Final Value
Sense Input Current
Supply Current
V
V
V
V
= 10mV to 100mV
15
4.5
60
µs
µA
µA
S
SENSE
SENSE
SENSE
+
–
l
l
, I
)
= 0V
= 0V
10
S (O) S (O
CC(O)
170
SR
Slew Rate (Note 8)
= 15V, V
= 26mV to 380mV, A = 50V/V
0.03
0.02
0.05
0.05
V/µs
V/µs
CC
SENSE
V
l
+
–
I
Short-Circuit Current
I
I
, I
8
15
60
mA
V
SC
SC SC
S(TOTAL)
l
l
Reverse V Supply
= –200µA, V = Open
50
S
CC
V
Minimum Output Voltage
V
V
= 0V, No Load
= V – V = –100mV, A = 50V/V, No
15
15
35
25
mV
mV
O(MIN)
O(MAX)
SENSE
SENSE
Load
+
–
S
S
V
l
l
l
l
V
Output High (Referred to V
)
A = 50V/V, V
= 100mV, I = 0
75
85
125
175
140
160
250
400
mV
mV
mV
mV
CC
V
SENSE
L
V
V
V
= 100mV, I = 100µA
SENSE
SENSE
SENSE
L
L
L
= 100mV, I = 500µA
= 100mV, I = 1mA
+
–
l
I
S
, I (Off) Sense Input Current (Power Down)
V
CC
= 0V, V = 48V, V = 0V
SENSE
0.001
1
µA
S
S
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: ESD (Electrostatic Discharge) sensitive devices. Extensive use of
ESD protection devices are used internal to the LT6100, however, high
electrostatic discharge can damage or degrade the device. Use proper ESD
handling precautions.
Note 5: The LT6100C is guaranteed to meet specified performance from
0°C to 70°C. The LT6100C is designed, characterized and expected to
meet specified performance from –40°C to 85°C but is not tested or
QA sampled at these temperatures. The LT6100I is guaranteed to meet
specified performance from –40°C to 85°C. The LT6100H is guaranteed to
meet specified performance from –40°C to 125°C.
Note 6: This parameter is not 100% tested.
Note 7: Gain error for A = 12.5, 25V/V is guaranteed by the other gain
V
Note 3: A heat sink may be required to keep the junction temperature
error tests.
below absolute maximum ratings.
Note 8: Slew rate is measured on the output between 3.5V and 13.5V.
Note 4: The LT6100C/LT6100I are guaranteed functional over the
operating temperature range of –40°C to 85°C. The LT6100H is guaranteed
functional over the operating temperature range of –40°C to 125°C.
6100fc
5
LT6100
Typical perForMance characTerisTics
Input Offset Voltage
vs Temperature
Input Offset Voltage
vs VS+ Input Voltage
Input Offset Voltage
vs VCC Supply Voltage
1.5
1.0
400
300
350
300
V
V
= 100mV
SENSE
CC
9 TYPICAL UNITS
T
= 85°C
= 25°C
= 3V
A
V
V
= 6.4V
= 5V
S
CC
T
T
= –40°C
= 125°C
A
A
T
T
= 25°C
0.5
A
A
200
T
A
250
0
100
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
= 85°C
T
= –40°C
200
150
100
50
A
0
V
V
= 100mV
SENSE
S
+
= 48V
–100
–200
–300
– 400
T
= 125°C
A
0
10 15 20 25
SUPPLY VOLTAGE (V)
40
0
40
0
5
30 35
10
20
30
50
–40 –25 –10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
6100 G21
+
V
INPUT VOLTAGE (V)
V
S
CC
6100 G01
6100 G02
Output Voltage vs Sense Voltage
Output Voltage vs Sense Voltage
Gain vs Temperature
50.06
50.04
50.02
50.00
49.98
49.96
49.94
49.92
49.90
49.88
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
+
+
7 TYPICAL UNITS
V
V
A
T
= 4.4V TO 48V
= 3V
V
V
T
= 6.4V TO 48V
= 5V
S
S
T
= –40°C
S
V
= 50mV TO 80mV
A
V
SENSE
S
CC
V
CC
= 10V/V
= –40°C TO 125°C
CC
+
> 6.6V
V
V
A
= 6.4V TO 48V
= 5V
= 50V/V
= –40°C TO 125°C
V
A
A
T
= –40°C
S
A
V
> 4.6V
T
= –40°C
S
A
V
T
= –40°C
S
A
V
= 6.4V
= 4.4V
0
180
240
–
300
–40 –25 –10
5
20 35
125
–150
–90
–30
150
60
120
50 65 80 95 110
30
+
90
+
–
SENSE VOLTAGE (V – V ) (mV)
TEMPERATURE (°C)
SENSE VOLTAGE (V – V )(mV)
S
S
S
S
6100 G04
6100 G05
6100 G03
Negative Sense Input Current
vs Sense Voltage
Positive Sense Input Current
vs Sense Voltage
Output Positive Swing
vs Load Current
12
10
8
35
30
25
20
15
10
5
350
300
+
+
+
V
V
= 4.4V TO 48V
= 3V
V
V
= 4.4V TO 48V
= 3V
V
V
V
A
= 6.4V
= 5V
S
S
S
CC
CC
CC
= 150mV
SENSE
= 50V/V
T
= 125°C
T
= 125°C
A
A
V
250
T
= 85°C
A
T
= 85°C
A
T
= 25°C
A
200
150
100
50
T
= 125°C
A
6
T
= –40°C
A
T
= 85°C
= 25°C
= –40°C
A
A
T
= 25°C
A
4
T
T
T
= –40°C
A
A
2
0
0
–5
0
30
70
–110 –70 –30
110
–30
–110 –70
30
+
70
110
0
0.3
0.7
0.9 1.0
0.8
0.1 0.2
0.4 0.5
0.6
+
–
–
SENSE VOLTAGE (V – V ) (mV)
LOAD CURRENT (mA)
SENSE VOLTAGE (V – V ) (mV)
S
S
S
S
6100 G06
6100 G07
6100 G08
6100fc
6
LT6100
Typical perForMance characTerisTics
VCC Supply Current vs
VS Input Voltage
Op Amp Output Impedance
vs Frequency
Gain vs Frequency
50
40
30
20
200
180
160
140
120
100
80
10k
1k
+
–
V
V
= 0V
V
V
= 12.1V
= 10V
SENSE
CC
V
V
V
, V = 6.5V
S
S
CC
S
= 3V
A
A
= 50
= 10
= 5V
= –5V
V
V
CC
EE
FIL = 0V
T
= 125°C
A
T
= 85°C
A
100
10
10
0
T
= 25°C
A
G2 = 5V/V
G2 = 2V/V
T
= –40°C
A
–10
–20
–30
–40
–50
60
G2 = 1V/V
100k
40
1
20
0.1
0
0
10
20
30
40
50
1k
10k
1M
100
1k
10k
100k
1M
10M
TOTAL V INPUT VOLTAGE (V)
FREQUENCY (Hz)
S
FREQUENCY (Hz)
6100 G10
6100 G09
6100 G23
CMRR vs Frequency
VCC PSRR vs Frequency
Gain Error vs VSENSE
150
130
110
90
1
0
V
S
= 10V
= 100mV
V
V
= 6.4V
= 5V
S
CC
140
120
100
80
V
SENSE
V
= 5V
CC
70
–1
–2
60
50
40
30
+
V
= 6.4V
S
V
= 5V
CC
= 10V/V
= 25°C
20
10
A
V
A
T
–10
0.1
0
–3
1
10 100 1k 10k 100k 1M
10
100
1k
10k
100k
1M
0
50
100
150
200
250
300
V
(mV)
FREQUENCY (Hz)
FREQUENCY (Hz)
SENSE
6100 G12
6100 G11
6100 G24
Sense Input Current (VCC Powered
Step Response at VSENSE = 0V to
130mV
Step Response at VSENSE = 0V to
130mV
+
Down) vs VS
10
1
+
–
V
= V
10V
S
S
10V
T
T
= 125°C
= 85°C
A
A
–
V
100mV/DIV
–
V
50mV/DIV
0.1
0.01
V
V
OUT
OUT
2V/DIV
500mV/DIV
0V
T
T
= 25°C
0V
A
A
6100 G13
6100 G14
+
+
V
S
A
V
C
L
= 10V
50µs/DIV
V
S
A
V
C
L
= 10V
0.2ms/DIV
= –40°C
= 10V/V
= 0pF
= 50V/V
= 0pF
0.001
0
10
20
V
30
40
50
+
(V)
S
6100 G25
6100fc
7
LT6100
Typical perForMance characTerisTics
Step Response at VSENSE = 0V to
10mV
Step Response at VSENSE = 0V to
10mV
Step Response at VSENSE = 0V to
130mV
10V
10V
V
20mV/DIV
10V
V
20mV/DIV
–
–
–
V
50mV/DIV
V
V
V
OUT
OUT
OUT
50mV/DIV
200mV/DIV
500mV/DIV
0V
0V
0V
6100 G15
6100 G16
6100 G17
+
+
+
V
A
C
= 10V
50µs/DIV
V
S
A
V
C
L
= 10V
50µs/DIV
V
A
C
= 10V
50µs/DIV
S
V
S
V
= 10V/V
= 0pF
= 50V/V
= 0pF
= 10V/V
= 1000pF
OUT
OUT
Step Response at VSENSE = 0V to
130mV
Step Response at VSENSE = 0V to
10mV
10V
10V
V–
20mV/DIV
V–
100mV/DIV
V
OUT
V
2V/DIV
OUT
50mV/DIV
0V
0V
6100 G18
6100 G19
+
+
V
S
A
V
C
L
= 10V
0.2ms/DIV
V
S
A
V
C
L
= 10V
50µs/DIV
= 50V/V
= 1000pF
= 10V/V
= 1000pF
Step Response at VSENSE = 0V to
10mV
Start-Up Delay
10V
V–
10V
+
V
S
20mV/DIV
0V
1V
0V
V
OUT
V
OUT
200mV/DIV
0V
6100 G20
6100 G22
+
V
S
A
V
C
L
= 10V
50µs/DIV
V
V
A
V
= 5V
20µs/DIV
CC
SENSE
V
= 50V/V
= 1000pF
= 100mV
= 10V/V
= 0V
EE
6100fc
8
LT6100
pin FuncTions
–
V
(Pin 1): Negative Sense Input Terminal. Negative
A2 (Pin 6): Gain Select Pin. Refer to Table 1.
S
sense voltage input will remain functional for voltages
A4 (Pin 7): Gain Select Pin. When Pin 7 is shorted to V ,
EE
–
up to 48V. V is connected to an internal gain-setting
resistor R = 5k.
S
the total gain is 40V/V. When both Pin 6 and Pin 7 are
G1
shorted to V , the total gain is 50V/V. When both Pin 6
EE
V
(Pin 2): Supply Voltage Input. This power supply pin
and Pin 7 are opened, the total gain is 10V/V.
CC
suppliescurrenttobothcurrentsenseamplifierandopamp.
+
V
(Pin 8): Positive Sense Input Terminal. Connecting a
S
+
–
FIL (Pin 3): Filter Pin. Connects to an external capacitor
supply to V and a load to V will allow the LT6100 to
S S
+
to roll off differential noise of the system. Pole frequency
monitor the current through R
, refer to Figure 1. V
SENSE S
f
= 1/(2πR C), R = R + R = 60k.
is connected to an internal gain setting resistor R = 5k.
–3dB
FIL
FIL
E
O
G2
+
V
remains functional for voltages up to 48V.
S
V
(Pin 4): Negative Supply or Ground for Single Supply
EE
Operation.
V
(Pin5):VoltageOutputProportionaltotheMagnitude
OUT
of the Current Flowing Through R
:
SENSE
V
OUT
= A • (V
V )
OS
V
SENSE
V
is the input offset voltage. A is the total gain of the
V
OS
LT6100.
FuncTional DiagraM
R
SENSE
V
IN
LOAD
(V + 1.4V) TO 48V
CC
1
8
–
+
V
V
S
S
R
R
G2
5k
G1
5k
+
–
R
25k
A1
V
CC
2
–
+
2.7V TO 36V
V
OUT
R
E
Q1
A2
5
10k
V
O1
R
O
R
R/3
A4
50k
V
EE
FIL
A2
4
3
6
7
6100 F01
Figure 1. Functional Diagram
6100fc
9
LT6100
applicaTions inForMaTion
The LT6100 high side current sense amplifier (Figure 1)
provides accurate unidirectional monitoring of current
through a user-selected sense resistor. The LT6100 fea-
tures a fully specified 4.1V to 48V input common mode
Table 1. Gain Set with Pin 6 and Pin 7
A2 (PIN 6)
Open
VEE
A4 (PIN 7)
Open
Out
G2
1
AV
10
1.25
2
12.5
20
range. A high PSRR V supply (2.7V to 36V) powers the
CC
VEE
Open
VEE
current sense amplifier and the internal op amp circuitry.
The input sense voltage is level shifted from the positive
sense power supply to the ground reference and amplified
by a user-selected gain to the output. The buffered output
voltage is directly proportional to the current flowing
through the sense resistor.
Out
2.5
4
25
Open
VEE
VEE
40
VEE
5
50
Selection of External Current Sense Resistor
External R resistor selection is a delicate trade-off
SENSE
betweenpowerdissipationintheresistorandcurrentmea-
surement accuracy. The maximum sense voltage may be
as large as 300mV to get maximum dynamic range. For
high current applications, the user may want to minimize
the sense voltage to minimize the power dissipation in
the sense resistor. The LT6100’s low input offset voltage
of 80µV allows for high resolution of low sense voltages.
This allows limiting the maximum sense voltage while still
providing high resolution current monitoring.
Theory of Operation (Refer to Figure 1)
+
Current from the source at V flows through R
to
SENSE
SENSE
S
–
the load at V , creating a sense voltage, V
. Inputs
S
+
–
V
S
and V apply the sense voltage to R . The opposite
S G2
ends of resistors R and R are forced to be at equal
G1
G2
potentials by the voltage gain of amplifier A1. The current
through R is forced to flow through transistor Q1 and is
G2
sourcedtonodeV .ThecurrentfromR flowingthrough
O1
G2
resistor R gives a voltage gain of ten, V /V
= R /
O
O1 SENSE
O
+
–
Kelvin connection of the LT6100’s V and V inputs to
S
S
R
G2
= 10V/V. The sense amplifier output at V is ampli-
O1
the sense resistor should be used to provide the highest
accuracy in high current applications. Solder connections
and PC board interconnect resistance (approximately
0.5mΩ per square) can be a large error in high current
systems. A 5A application might choose a 20mΩ sense
resistor to give a 100mV full-scale input to the LT6100.
Input offset voltage will limit resolution to 4mA. Neglect-
ing contact resistance at solder joints, even one square
of PC board copper at each resistor end will cause an
error of 5%. This error will grow proportionately higher
as monitored current levels rise.
fied again by amplifier A2. The inputs of amplifier A2 can
operate to ground which ensures that small sense voltage
signals are detected. Amplifier A2 can be programmed to
different gains via Pin 6 and Pin 7. Thus, the total gain of
the system becomes A = 10 • A2 and V
= V
• A .
V
OUT
SENSE V
Gain Setting
The LT6100 gain is set by strapping (or floating) the two
gain pins (see Table 1). This feature allows the user to
“zoom in” by increasing the gain for accurate measure-
ment of low currents.
A = 10V/V • G2, G2 is the gain of op amp A2.
V
6100fc
10
LT6100
applicaTions inForMaTion
Noise Filtering
an amplified, level shifted representation of the R
SENSE
voltage is developed at V . The output is well behaved
OUT
The LT6100 provides signal filtering via pin FIL that is
driving capacitive loads to 1000pF.
internally connected to the resistors R and R . This pin
E
O
maybeusedtofiltertheinputsignalenteringtheLT6100’s
internal op amp, and should be used when fast ripple cur-
rent or transients flow through the sense resistor. High
frequency signals above the 300kHz bandwidth of the
LT6100’s internal amplifier will cause errors. A capacitor
Sense Input Signal Range
The LT6100 has high CMRR over the wide input voltage
range of 4.1V to 48V. The minimum operation voltage of
the sense amplifier input is 1.4V above V . The output
CC
remains accurate even when the sense inputs are driven
connected between FIL and V creates a single pole low
EE
to 48V. Figure 2 shows that V changes very slightly
pass filter with corner frequency:
OS
over a wide input range. Furthermore, the sense inputs
f
= 1/(2πR C)
FIL
+
–
–3dB
V
and V can collapse to zero volts without incurring
S
S
where R = 60k. A 220pF capacitor creates a pole at
any damage to the device. The LT6100 can handle dif-
FIL
12kHz, a good choice for many applications.
ferential sense voltages up to the voltage of the sense
+
–
inputs supplies. For example, V = 48V and V = 0V can
S
S
Output Signal Range
be a valid condition in a current monitoring application
(Figure 3) when an overload protection fuse is blown and
TheLT6100’soutputsignalisdevelopedbycurrentthrough
–
V
S
voltage collapses to ground. Under this condition, the
R
intooutputresistorR .ThecurrentisV
/R .The
G2
O
SENSE G2
output of the LT6100 goes to the positive rail, V . There
OH
sense amplifier output, V , is buffered by the internal op
O1
is no phase inversion to cause an erroneous output signal.
ampsothatconnectingtheoutputpinstoothersystemswill
+
For the opposite case when V collapse to ground with
S
preserve signal accuracy. For zero V
, internal circuit
SENSE
–
V
S
held up at some higher voltage potential, the output
saturation with loss of accuracy occurs at the minimum
will sit at V . If both inputs fall below the minimum CM
OL
CC
V
OUT
swing, 15mV above V . V
may swing positive
EE OUT
voltage, V + 1.4V, the output is indeterminate but the
to within 75mV of V or a maximum of 36V, a limit set
CC
LT6100 will not be damaged.
by internal junction breakdown. Within these constraints,
1.5
TO LOAD
R
FUSE
V
V
A
= 100mV
SENSE
1
SENSE
CC
DC
1.0
0.5
= 3V
SOURCE
T
= 25°C
C1
0.1µF
8
–
+
0
V
V
S
S
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
2
7
6
V
A4
A2
CC
+
C2
–
+
5V
0.1µF
3
FIL
OUT
4
5
OUTPUT
V
EE
LT6100
0
40
10
20
30
50
V
INPUT VOLTAGE (V)
6100 F03
S
6100 F02
Figure 2. VOS vs VS Input Voltage
Figure 3. Current Monitoring of a Fuse Protected Circuit
6100fc
11
LT6100
applicaTions inForMaTion
Low Sense Voltage Operation
V
= 15mV. The accuracy at small sense voltages can be
OL
improved by selecting higher gain. When gain of 50V/V
is selected, as shown in Figure 7, V leaves the clipped
Figure 4 shows the simplest circuit configuration in which
OUT
the LT6100 may be used. While V
(output voltage)
OUT
region for a positive V
to 2.5mV for gain of 10V/V (see Figure 6).
greater than 1mV compared
SENSE
increases with positive sense current, at V
= 0V,
SENSE
the LT6100’s buffered output can only swing as low as
1.6
V
V
A
= 4.4V TO 48V
S
TO LOAD
R
SENSE
= 3V
CC
= 10V/V
= 25°C
1.4
1.2
1.0
V
A
+
C1
0.1µF
T
5V
1
8
–
+
V
S
V
S
2
7
6
V
A4
A2
CC
0.8
0.6
+
C2
–
+
3V
0.1µF
3
FIL
0.4
0.2
0
OUT
4
5
OUTPUT
V
EE
30
60
120
0
150
90
+
LT6100
–
SENSE VOLTAGE (V – V ) (mV)
S
S
6100 F04
6100 F05
Figure 4. LT6100 Load Current Monitor
Figure 5. Output Voltage vs VSENSE
0.40
0.35
0.30
0.25
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
V
V
A
T
= 4.4V TO 48V
= 3V
V
V
A
T
= 4.4V TO 48V
= 3V
S
CC
V
A
S
CC
V
A
= 10V/V
= 50V/V
= 25°C
= 25°C
0.20
0.15
0.10
0.05
0
0
5
10
20
0
25
30
15
0
5
10
15
30
20
25
+
–
+
–
SENSE VOLTAGE (V – V ) (mV)
SENSE VOLTAGE (V – V ) (mV)
S
S
S
S
6100 F06
6100 F07
Figure 6. Expanded View of Output Voltage vs VSENSE, AV = 10V/V
Figure 7. Expanded View of Output Voltage vs VSENSE, AV = 50V/V
6100fc
12
LT6100
applicaTions inForMaTion
Power Down While Connected to a Battery
its inputs remain high impedance (see Figure 8). This is
due to the implementation of Linear Technology’s Over-
The-Top® input topology at its front end. When powered
down, the LT6100 inputs draw less than 1µA of current.
AnotheruniquebenefitoftheLT6100isthatyoucanleaveit
connectedtoabatteryevenwhenitisdeniedpower. When
the LT6100 loses power or is intentionally powered down,
I
SENSE
R
SENSE
TO LOAD
+
BATTERY
4.1V TO 48V
–
+
V
V
LT6100
S
S
POWER
–
+
DOWN OK
V
CC
3V
0V
V
CC
INPUTS
REMAIN
Hi-Z
FIL
V
OUT
V
A2
A4
EE
6100 F08
Figure 8. Input Remains Hi-Z when LT6100 is Powered Down
Typical applicaTion
Micro-Hotplate Voltage and Current Monitor
Adjust Gain Dynamically for Enhanced Range
+
I
SENSE
V
DR
R
SENSE
TO LOAD
FROM SOURCE
–
+
V
S
V
LT6100
S
10Ω
1%
–
+
V
V
V
S
S
–
+
I
HOTPLATE
–
+
5V
V
CC
5V
CURRENT
MONITOR
OUT
CC
LT6100
EE A2 A4
V
= 500mV/mA
FIL
V
V
OUT
MICRO-HOTPLATE
BOSTON
MICROSYSTEMS
MHP100S-005
V
A2
A4
EE
6100 TA05
5V
5V
5V
2N7002
M9
M3
(GAIN = 50)
0V
(GAIN = 10)
VOLTAGE
MONITOR
M1
LT1991
+
–
P1
P3
P9
V
– V
10
DR
DR
V
=
OUT
–
6100 TA06
V
DR
www.bostonmicrosystems.com
6100fc
13
LT6100
package DescripTion
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698 Rev C)
R = 0.125
0.40 0.10
TYP
5
8
0.70 0.05
3.5 0.05
2.10 0.05 (2 SIDES)
1.65 0.05
3.00 0.10
(4 SIDES)
1.65 0.10
(2 SIDES)
PIN 1
TOP MARK
(NOTE 6)
PACKAGE
OUTLINE
(DD8) DFN 0509 REV C
4
1
0.25 0.05
0.75 0.05
0.200 REF
0.25 0.05
0.50 BSC
0.50
BSC
2.38 0.10
2.38 0.05
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-ꢀꢂꢂ0 Rev F)
0.889 0.ꢀꢁ7
(.035 .005)
5.ꢁ3
(.ꢁ0ꢂ)
MIN
3.ꢁ0 – 3.45
(.ꢀꢁꢂ – .ꢀ3ꢂ)
3.00 0.ꢀ0ꢁ
(.ꢀꢀ8 .004)
(NOTE 3)
0.5ꢁ
(.0ꢁ05)
REF
0.ꢂ5
(.0ꢁ5ꢂ)
BSC
0.4ꢁ 0.038
(.0ꢀꢂ5 .00ꢀ5)
TYP
8
7 ꢂ
5
RECOMMENDED SOLDER PAD LAYOUT
3.00 0.ꢀ0ꢁ
(.ꢀꢀ8 .004)
(NOTE 4)
4.90 0.ꢀ5ꢁ
(.ꢀ93 .00ꢂ)
DETAIL “A”
0.ꢁ54
(.0ꢀ0)
0° – ꢂ° TYP
GAUGE PLANE
ꢀ
ꢁ
3
4
0.53 0.ꢀ5ꢁ
(.0ꢁꢀ .00ꢂ)
ꢀ.ꢀ0
(.043)
MAX
0.8ꢂ
(.034)
REF
DETAIL “A”
0.ꢀ8
(.007)
SEATING
PLANE
0.ꢁꢁ – 0.38
0.ꢀ0ꢀꢂ 0.0508
(.009 – .0ꢀ5)
(.004 .00ꢁ)
0.ꢂ5
(.0ꢁ5ꢂ)
BSC
TYP
MSOP (MS8) 0307 REV F
NOTE:
ꢀ. DIMENSIONS IN MILLIMETER/(INCH)
ꢁ. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.ꢀ5ꢁmm (.00ꢂ") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.ꢀ5ꢁmm (.00ꢂ") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.ꢀ0ꢁmm (.004") MAX
6100fc
14
LT6100
revision hisTory (Revision history begins at Rev C)
REV
DATE
DESCRIPTION
PAGE NUMBER
C
11/12 Corrected value in Output Signal Range section.
11
6100fc
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
15
LT6100
Typical applicaTions
800mA/1A White LED Current Regulator
D2
LED
WARNING! VERY BRIGHT
DO NOT OBSERVE DIRECTLY
L1
3µH
LED
CURRENT
D1
B130
0.030Ω
LT6100
+
–
V
V
S
S
V
IN
V
V
SW
3.3V TO 4.2V
SINGLE Li-Ion
IN
V
CC
LT3436
–
+
22µF
16V
CER
1210
SHDN
FB
C
LED
ON
124k
V
V
GND
OUT
V
EE A4 A2
MMBT2222
4.99k
4.7µF
6.3V
CER
8.2k
0.1µF
OPEN: 1A
CLOSED: 800mA
6100 TA02
D1: DIODES INC.
D2: LUMILEDS LXML-PW09 WHITE EMITTER
L1: SUMIDA CDRH6D28-3R0
Filtered Gain of 20 Current Sense
Gain of 50 Current Sense
I
I
SENSE
SENSE
R
SENSE
R
SENSE
V
V
SUPPLY
6.4V TO 48V
SUPPLY
4.4V TO 48V
+
–
+
–
V
V
S
LOAD
V
V
S
LOAD
LT6100
LT6100
S
S
–
–
+
+
V
CC
V
3V
5V
CC
FIL
FIL
V
V
OUT
1000pF
OUT
20 • R
• I
50 • R
• I
SENSE SENSE
SENSE SENSE
V
A2
A4
V
A2
A4
EE
EE
6100 TA03
6100 TA04
–3dB AT 2.6kHz
relaTeD parTs
PART NUMBER
DESCRIPTION
Dual Precision Instrumentation Switched Capacitor Building Block 120dB CMRR, 3V to 18V Operation
Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps 50µA Amplifier, 2.7V to 40V Operation, Over-The-Top Inputs
COMMENTS
LTC1043
LT1490/LT1491
LT1620/LT1621
Rail-to-Rail Current Sense Amplifiers
Accurate Output Current Programming, Battery Charging
to 32V
LT1787
Precision Bidirectional, High Side Current Sense Amplifier
75µV V , 60V, 60µA Operation
OS
LTC6101/LTC6101HV High Voltage, High Side, Precision Current Sense Amplifiers
4V to 60V/5V to 100V, Gain Configurable, SOT-23
6100fc
LT 1112 REV C • PRINTED IN USA
16 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
LINEAR TECHNOLOGY CORPORATION 2005
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
相关型号:
LT6110HDC#PBF
LT6110 - Cable/Wire Drop Compensator; Package: DFN; Pins: 8; Temperature Range: -40°C to 125°C
Linear
LT6110HDC#TRMPBF
LT6110 - Cable/Wire Drop Compensator; Package: DFN; Pins: 8; Temperature Range: -40°C to 125°C
Linear
LT6110HDC#TRPBF
LT6110 - Cable/Wire Drop Compensator; Package: DFN; Pins: 8; Temperature Range: -40°C to 125°C
Linear
LT6110HTS8#PBF
LT6110 - Cable/Wire Drop Compensator; Package: SOT; Pins: 8; Temperature Range: -40°C to 125°C
Linear
LT6110HTS8#TRMPBF
LT6110 - Cable/Wire Drop Compensator; Package: SOT; Pins: 8; Temperature Range: -40°C to 125°C
Linear
LT6110HTS8#TRPBF
LT6110 - Cable/Wire Drop Compensator; Package: SOT; Pins: 8; Temperature Range: -40°C to 125°C
Linear
LT6110IDC#PBF
LT6110 - Cable/Wire Drop Compensator; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C
Linear
LT6110IDC#TRMPBF
LT6110 - Cable/Wire Drop Compensator; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C
Linear
LT6110ITS8#PBF
LT6110 - Cable/Wire Drop Compensator; Package: SOT; Pins: 8; Temperature Range: -40°C to 85°C
Linear
©2020 ICPDF网 联系我们和版权申明