LTC6101AIS5#PBF [Linear]
LTC6101 - High Voltage, High-Side Current Sense Amplifier in SOT-23; Package: SOT; Pins: 5; Temperature Range: -40°C to 85°C;型号: | LTC6101AIS5#PBF |
厂家: | Linear |
描述: | LTC6101 - High Voltage, High-Side Current Sense Amplifier in SOT-23; Package: SOT; Pins: 5; Temperature Range: -40°C to 85°C 模拟IC 信号电路 光电二极管 |
文件: | 总22页 (文件大小:258K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LTC6101/LTC6101HV
High Voltage,
High-Side Current Sense
Amplifier in SOT-23
FEATURES
DESCRIPTION
TheLTC®6101/LTC6101HVareversatile,highvoltage,high
sidecurrentsenseamplifiers.Designflexibilityisprovided
by the excellent device characteristics; 300ꢀV Max offset
and only 375ꢀA (typical at 60V) of current consumption.
The LTC6101 operates on supplies from 4V to 60V and
LTC6101HV operates on supplies from 5V to 100V.
n
Supply Range:
5V to 100V, 105V Absolute Maximum (LTC6101HV)
4V to 60V, 70V Absolute Maximum (LTC6101)
Low Offset Voltage: 300μV Max
Fast Response: 1μs Response Time (0V to 2.5V on
a 5V Output Step)
Gain Configurable with 2 Resistors
Low Input Bias Current: 170nA Max
PSRR: 118dB Min
Output Current: 1mA Max
Low Supply Current: 250ꢀA, V = 12V
Specified Temperature Range: –40°C to 125°C
Operating Temperature Range: –55°C to 125°C
Low Profile (1mm) SOT-23 (ThinSOT™) Package
n
n
n
n
n
n
n
n
n
n
The LTC6101 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. Low DC
offset allows the use of a small shunt resistor and large
gain-setting resistors. As a result, power loss in the shunt
is reduced.
S
The wide operating supply range and high accuracy make
the LTC6101 ideal for a large array of applications from
automotive to industrial and power management. A maxi-
mum input sense voltage of 500mV allows a wide range
of currents to be monitored. The fast response makes the
LTC6101 the perfect choice for load current warnings and
shutoff protection control. With very low supply current,
the LTC6101 is suitable for power sensitive applications.
APPLICATIONS
n
Current Shunt Measurement
n
Battery Monitoring
n
Remote Sensing
n
Power Management
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
The LTC6101 is available in 5-lead SOT-23 and 8-lead
MSOP packages.
TYPICAL APPLICATION
16-Bit Resolution Unidirectional Output into LTC2433 ADC
Step Response
I
V
LOAD
SENSE
+
–
–
V
SENSE
R
IN
100Ω
5V TO 105V
ΔV
SENSE
– = 100mV
+IN
–IN
5.5V
5V
L
O
A
D
–
+
+
–
V
V
T
= 25°C
+ = 12V
A
V
1μF
5V
R
R
V
= 100
= 5k
IN
OUT
V
OUT
+ = V+
V
OUT
SENSE
OUT
LTC6101HV
I
= 100μA
= 0
OUT
LTC2433-1
TO μP
0.5V
0V
R
OUT
I
OUT
4.99k
500ns/DIV
6101 TA01
6101 TA01b
R
R
OUT
V
OUT
=
• V
= 49.9V
SENSE SENSE
IN
6101fh
1
LTC6101/LTC6101HV
ABSOLUTE MAXIMUM RATINGS
(Note 1)
+
–
Total Supply Voltage (V to V )
LTC6101I/LTC6101HVI......................... –40°C to 85°C
LTC6101H/LTC6101HVH ................... –55°C to 125°C
Specified Temperature Range (Note 2)
LTC6101C/LTC6101HVC........................... 0°C to 70°C
LTC6101I/LTC6101HVI......................... –40°C to 85°C
LTC6101H/LTC6101HVH ................... –40°C to 125°C
Storage Temperature Range.................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................. 300°C
LTC6101............................................................... 70V
LTC6101HV........................................................ 105V
+
Minimum Input Voltage (–IN Pin).................... (V – 4V)
Maximum Output Voltage (Out Pin)............................9V
Input Current....................................................... 10mA
–
Output Short-Circuit Duration (to V ).............. Indefinite
Operating Temperature Range
LTC6101C/LTC6101HVC.......................–40°C to 85°C
PIN CONFIGURATION
TOP VIEW
+
TOP VIEW
–IN
NC
NC
1
2
3
4
8 +IN
7 V
OUT 1
–
5 V
+
V
2
6 NC
–
–IN 3
4 +IN
5 V
OUT
MS8 PACKAGE
8-LEAD PLASTIC MSOP
= 150°C, θ = 300°C/ W
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
= 150°C, θ = 250°C/ W
T
JMAX
JA
T
JMAX
JA
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
LTBSB
PACKAGE DESCRIPTION
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
SPECIFIED TEMPERATURE RANGE
LTC6101ACMS8#PBF
LTC6101AIMS8#PBF
LTC6101AHMS8#PBF
LTC6101HVACMS8#PBF
LTC6101HVAIMS8#PBF
LTC6101ACMS8#TRPBF
LTC6101AIMS8#TRPBF
LTC6101AHMS8#TRPBF
0°C to 70°C
LTBSB
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
LTBSB
LTC6101HVACMS8#TRPBF LTBSX
LTC6101HVAIMS8#TRPBF LTBSX
–40°C to 85°C
–40°C to 125°C
LTC6101HVAHMS8#PBF LTC6101HVAHMS8#TRPBF LTBSX
6101fh
2
LTC6101/LTC6101HV
ORDER INFORMATION
Lead Free Finish
TAPE AND REEL (MINI)
LTC6101ACS5#TRMPBF
LTC6101AIS5#TRMPBF
LTC6101AHS5#TRMPBF
LTC6101BCS5#TRMPBF
LTC6101BIS5#TRMPBF
LTC6101BHS5#TRMPBF
LTC6101CCS5#TRMPBF
LTC6101CIS5#TRMPBF
LTC6101CHS5#TRMPBF
TAPE AND REEL
PART MARKING*
LTBND
LTBND
LTBND
LTBND
LTBND
LTBND
LTBND
LTBND
LTBND
LTBSZ
PACKAGE DESCRIPTION
SPECIFIED TEMPERATURE RANGE
0°C to 70°C
LTC6101ACS5#TRPBF
LTC6101AIS5#TRPBF
LTC6101AHS5#TRPBF
LTC6101BCS5#TRPBF
LTC6101BIS5#TRPBF
LTC6101BHS5#TRPBF
LTC6101CCS5#TRPBF
LTC6101CIS5#TRPBF
LTC6101CHS5#TRPBF
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
LTC6101HVACS5#TRMPBF LTC6101HVACS5#TRPBF
LTC6101HVAIS5#TRMPBF LTC6101HVAIS5#TRPBF
LTBSZ
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
LTC6101HVAHS5#TRMPBF LTC6101HVAHS5#TRPBF
LTC6101HVBCS5#TRMPBF LTC6101HVBCS5#TRPBF
LTBSZ
LTBSZ
LTC6101HVBIS5#TRMPBF
LTC6101HVBIS5#TRPBF
LTBSZ
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
LTC6101HVBHS5#TRMPBF LTC6101HVBHS5#TRPBF
LTC6101HVCCS5#TRMPBF LTC6101HVCCS5#TRPBF
LTBSZ
LTBSZ
LTC6101HVCIS5#TRMPBF
LTC6101HVCIS5#TRPBF
LTBSZ
–40°C to 85°C
–40°C to 125°C
LTC6101HVCHS5#TRMPBF LTC6101HVCHS5#TRPBF
LTBSZ
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/
6101fh
3
LTC6101/LTC6101HV
ELECTRICAL CHARACTERISTICS (LTC6101) The ● denotes the specifications which apply over the full
specified temperature range, otherwise specifications are at TA = 25°C, RIN = 100Ω, ROUT = 10k, VSENSE+ = V+ (see Figure 1 for
details), 4V ≤ VS ≤ 60V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Supply Voltage Range
Input Offset Voltage
●
4
60
V
S
V
V
SENSE
V
SENSE
V
SENSE
= 5mV, Gain = 100, LTC6101A
= 5mV, Gain = 100, LTC6101AC, LTC6101AI
= 5mV, Gain = 100, LTC6101AH
85
300
450
535
μV
μV
μV
OS
●
●
V
= 5mV, Gain = 100, LTC6101B
150
400
450
810
μV
μV
SENSE
●
●
V
= 5mV, Gain = 100, LTC6101C
800
1200
μV
μV
SENSE
ΔV /ΔT
Input Offset Voltage Drift
Input Bias Current
V
V
V
= 5mV, LTC6101A
= 5mV, LTC6101B
= 5mV, LTC6101C
●
●
●
1
3
5
μV/°C
μV/°C
μV/°C
OS
SENSE
SENSE
SENSE
I
I
R
= 1M
100
170
245
nA
nA
B
IN
●
●
●
Input Offset Current
R
= 1M
2
15
nA
OS
IN
V
Input Sense Voltage Full Scale
Power Supply Rejection Ratio
V
OS
within Specification, R = 1k (Note 3)
500
mV
SENSE(MAX)
IN
PSRR
V = 6V to 60V, V
S
= 5mV, Gain = 100
= 5mV, Gain = 100
= 88mV
118
115
140
133
dB
dB
SENSE
●
V = 4V to 60V, V
S
110
105
dB
dB
SENSE
●
V
V
Maximum Output Voltage
Minimum Output Voltage
12V ≤ V ≤ 60V, V
●
●
●
8
3
1
V
V
V
OUT
S
SENSE
V = 6V, V
= 330mV, R = 1k, R
= 550mV, R = 1k, R
= 10k
= 2k
S
SENSE
SENSE
IN
OUT
OUT
V = 4V, V
S
IN
V
SENSE
V
SENSE
V
SENSE
= 0V, Gain = 100, LTC6101A
= 0V, Gain = 100, LTC6101AC, LTC6101AI
= 0V, Gain = 100, LTC6101AH
0
30
45
53.5
mV
mV
mV
OUT (0)
●
●
V
= 0V, Gain = 100, LTC6101B
0
0
45
81
mV
mV
SENSE
●
●
V
= 0V, Gain = 100, LTC6101C
150
250
mV
mV
SENSE
I
t
Maximum Output Current
6V ≤ V ≤ 60V, R
= 2k, V = 110mV, Gain = 20
SENSE
●
●
1
0.5
mA
mA
OUT
S
OUT
V = 4V, V
= 550mV, Gain = 2, R = 2k
S
SENSE
OUT
Input Step Response
(to 2.5V on a 5V Output Step)
ΔV
= 100mV Transient, 6V ≤ V ≤ 60V, Gain = 50
1
1.5
μs
μs
r
SENSE
S
V = 4V
S
BW
Signal Bandwidth
I
I
= 200ꢀA, R = 100, R = 5k
OUT
140
200
kHz
kHz
OUT
OUT
IN
= 1mA, R = 100, R
= 5k
IN
OUT
I
Supply Current
V = 4V, I
= 0, R = 1M
220
240
250
375
450
475
μA
μA
S
S
OUT
IN
●
●
●
V = 6V, I
= 0, R = 1M
475
525
μA
μA
S
OUT
IN
V = 12V, I
S
= 0, R = 1M
500
590
μA
μA
OUT
IN
V = 60V, I
S
= 0, R = 1M
640
μA
OUT
IN
LTC6101AI, LTC6101AC, LTC6101BI, LTC6101BC,
LTC6101CI, LTC6101CC
LTC6101AH, LTC6101BH, LTC6101CH
●
●
690
720
μA
μA
6101fh
4
LTC6101/LTC6101HV
ELECTRICAL CHARACTERISTICS (LTC6101HV) The ● denotes the specifications which apply over the full
specified temperature range, otherwise specifications are at TA = 25°C, RIN = 100Ω, ROUT = 10k, VSENSE+ = V+ (see Figure 1 for
details), 5V ≤ VS ≤ 100V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Supply Voltage Range
Input Offset Voltage
●
5
100
V
S
V
V
SENSE
V
SENSE
V
SENSE
= 5mV, Gain = 100, LTC6101HVA
= 5mV, Gain = 100, LTC6101HVAC, LTC6101HVAI
= 5mV, Gain = 100, LTC6101HVAH
85
300
450
535
μV
μV
μV
OS
●
●
V
= 5mV, Gain = 100, LTC6101HVB
150
400
450
810
μV
μV
SENSE
●
●
V
= 5mV, Gain = 100, LTC6101HVC
800
1200
μV
μV
SENSE
ΔV /ΔT
Input Offset Voltage Drift
Input Bias Current
V
V
V
= 5mV, LTC6101HVA
= 5mV, LTC6101HVB
= 5mV, LTC6101HVC
●
●
●
1
3
5
μV/°C
μV/°C
μV/°C
OS
SENSE
SENSE
SENSE
I
I
R
= 1M
100
170
245
nA
nA
B
IN
●
●
●
Input Offset Current
R
= 1M
2
15
nA
OS
IN
V
Input Sense Voltage Full Scale
Power Supply Rejection Ratio
V
OS
within Specification, R = 1k (Note 3)
500
mV
SENSE(MAX)
IN
PSRR
V = 6V to 100V, V
S
= 5mV, Gain = 100
= 5mV, Gain = 100
= 88mV
118
115
140
133
dB
dB
SENSE
●
V = 5V to 100V, V
S
110
105
dB
dB
SENSE
●
V
V
Maximum Output Voltage
Minimum Output Voltage
12V ≤ V ≤ 100V, V
V = 5V, V
S
●
●
8
3
V
V
OUT
S
SENSE
= 330mV, R = 1k, R
= 10k
SENSE
IN
OUT
V
SENSE
V
SENSE
V
SENSE
= 0V, Gain = 100, LTC6101HVA
= 0V, Gain = 100, LTC6101HVAC, LTC6101HVAI
= 0V, Gain = 100, LTC6101HVAH
0
30
45
53.5
mV
mV
mV
OUT (0)
●
●
V
= 0V, Gain = 100, LTC6101HVB
0
0
45
81
mV
mV
SENSE
●
V
= 0V, Gain = 100, LTC6101HVC
150
250
mV
mV
SENSE
●
●
I
t
Maximum Output Current
5V ≤ V ≤ 100V, R
= 2k, V = 110mV, Gain = 20
SENSE
1
mA
OUT
S
OUT
Input Step Response
(to 2.5V on a 5V Output Step)
ΔV
V = 5V
S
= 100mV Transient, 6V ≤ V ≤ 100V, Gain = 50
1
1.5
μs
μs
r
SENSE
S
BW
Signal Bandwidth
I
I
= 200ꢀA, R = 100, R = 5k
OUT
140
200
kHz
kHz
OUT
OUT
IN
= 1mA, R = 100, R
= 5k
IN
OUT
I
Supply Current
V = 5V, I
= 0, R = 1M
200
220
230
350
450
475
μA
μA
S
S
OUT
IN
●
●
●
V = 6V, I
= 0, R = 1M
475
525
μA
μA
S
OUT
IN
V = 12V, I
S
= 0, R = 1M
500
590
μA
μA
OUT
IN
V = 60V, I
= 0, R = 1M
640
690
720
μA
μA
μA
S
OUT
IN
LTC6101HVI, LTC6101HVC
LTC6101HVH
●
●
V = 100V, I
= 0, R = 1M
350
640
μA
S
OUT
IN
LTC6101HVAI, LTC6101HVAC, LTC6101HVBI,
LTC6101HVBC, LTC6101HVCI, LTC6101HVCC
LTC6101HVAH, LTC6101HVBH, LTC6101HVCH
●
●
690
720
μA
μA
6101fh
5
LTC6101/LTC6101HV
ELECTRICAL CHARACTERISTICS
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.
characterized and expected to meet specified performance from –40°C to
85°C but are not tested or QA sampled at these temperatures. LTC6101I/
LTC6101HVI are guaranteed to meet specified performance from –40°C
to 85°C. The LTC6101H/LTC6101HVH are guaranteed to meet specified
performance from –40°C to 125°C.
Note 2: The LTC6101C/LTC6101HVC are guaranteed to meet specified
performance from 0°C to 70°C. The LTC6101C/LTC6101HVC are designed,
Note 3: R
= 10k for 6V ≤ V ≤ 100V, R
= 2k for V = 4V.
OUT S
OUT
S
TYPICAL PERFORMANCE CHARACTERISTICS
Input VOS vs Temperature
Input VOS vs Supply Voltage
Input Sense Range
2.5
2
800
600
40
20
REPRESENTATIVE
T
A
= 25°C
T
= 0°C
T
A
= –40°C
A
UNITS
T
= 0°C
A
0
400
T
T
= 70°C
A
T
T
= –40°C
= 25°C
–20
–40
–60
–80
–100
–120
–140
200
A
A
1.5
1
0
= 125°C
A
–200
–400
–600
–800
–1000
T
= 85°C
A
T
T
= 85°C
A
A
R
R
V
= 100
= 5k
IN
OUT
IN
0.5
0
R
R
IN
= 100
= 5k
A GRADE
B GRADE
C GRADE
IN
OUT
R
R
= 3k
IN
= 3k
OUT
= 5mV
LTC6101
LTC6101HV
= 125°C
V
= 5mV
4
11 18 25 32 39 46 53 60
(V)
–40 –20
0
20 40 60 80 100 120
TEMPERATURE (°C)
4 10 20 30 40 50 60 70 80 90 100
(V)
V
V
SUPPLY
SUPPLY
6101 G02
6101 G05
6101 G01
LTC6101: VOUT Maximum
vs Temperature
LTC6101HV: VOUT Maximum
vs Temperature
LTC6101: IOUT Maximum
vs Temperature
12
10
8
12
10
8
7
V
S
= 60V
V
S
= 100V
S
V
= 12V
S
6
5
4
3
2
1
0
V
S
= 12V
V
= 12V
V
= 60V
S
V
V
V
= 6V
= 5V
= 4V
S
S
S
6
6
V
V
= 6V
= 4V
S
V
V
= 6V
= 4V
S
S
4
4
S
2
2
0
0
–40 –20
0
20 40 60 80 100 120
TEMPERATURE (°C)
6101 G06
–40 –20
0
20 40 60 80 100 120
TEMPERATURE (°C)
6101 G20
–40 –20
0
20 40 60 80 100 120
TEMPERATURE (°C)
6101 G07
6101fh
6
LTC6101/LTC6101HV
TYPICAL PERFORMANCE CHARACTERISTICS
LTC6101HV: IOUT Maximum
vs Temperature
Output Error Due to Input Offset
vs Input Voltage
Gain vs Frequency
100
10
1
40
35
7
6
5
4
3
2
1
0
T
= 25°C
A
GAIN =10
I
= 1mA
OUT
V
S
= 12V
T
R
R
= 25°C
= 100
OUT
A
IN
30
25
20
15
10
5
= 4.99k
V
S
= 100V
V
V
= 6V
= 5V
I
= 200μA
S
OUT
S
C GRADE
0.1
B GRADE
A GRADE
0
V
S
= 4V
–5
–10
0.01
–40 –20
0
20 40 60 80 100 120
TEMPERATURE (°C)
6101 G21
1k
10k
100k
1M
0
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
FREQUENCY (Hz)
INPUT VOLTAGE (V)
6101 G09
6101 G08
Input Bias Current
vs Temperature
LTC6101: Supply Current
vs Supply Voltage
LTC6101HV: Supply Current
vs Supply Voltage
450
400
350
300
250
200
150
100
50
600
500
400
300
200
100
0
160
140
120
100
80
70°C
85°C
125°C
70°C
85°C
V
S
= 6V TO 100V
125°C
V
S
= 4V
25°C
0°C
25°C
60
–40°C
0°C
–40°C
40
V
= 0
V
= 0
IN
IN
IN
IN
20
R
= 1M
R
= 1M
0
0
–40 –20
0
20 40 60 80 100 120
TEMPERATURE (°C)
0
4
8 12 16 20 24 28 32 36 40 44 48 52 56 60
0
10 20 30 40 50 60 70 80 90 100
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
6101 G10
6101 G11
6101 G22
Step Response 0mV to 10mV
Step Response 10mV to 20mV
–
–
V
V+-10mV
V+-20mV
SENSE
V
SENSE
V+
V+-10mV
0.5V
1V
T
= 25°C
A
T
= 25°C
V+ = 12V
A
V+ = 12V
R
R
V
= 100
IN
R
R
V
= 100
IN
= 5k
OUT
= 5k
+ = V+
OUT
+ = V+
SENSE
SENSE
0V
0.5V
V
OUT
V
OUT
TIME (10μs/DIV)
TIME (10μs/DIV)
6101 G12
6101 G13
6101fh
7
LTC6101/LTC6101HV
TYPICAL PERFORMANCE CHARACTERISTICS
Step Response Rising Edge
Step Response 100mV
Step Response 100mV
–
–
–
V
V
V
SENSE
SENSE
SENSE
V+
V+
ΔV
– =100mV
SENSE
V+-100mV
T = 25°C
A
V+-100mV
V+ = 12V
= 2200pF
C
= 10pF
LOAD
C
5V
5.5V
5V
5V
LOAD
T
= 25°C
A
R
R
V
= 100
IN
V+ = 12V
= 5k
OUT
SENSE
R
R
V
= 100
= 5k
+ = V+
T
= 25°C
IN
OUT
A
V+ = 12V
+ = V+
C
= 1000pF
R
R
V
= 100
= 5k
SENSE
LOAD
SENSE
IN
OUT
V
OUT
+ = V+
I
= 100μA
OUT
0V
0.5V
0V
I
= 0
0V
V
OUT
V
OUT
OUT
TIME (100μs/DIV)
TIME (10μs/DIV)
TIME (500ns/DIV)
6101 G15
6101 G14
6101 G16
Step Response Falling Edge
PSRR vs Frequency
160
LTC6101,
+
ΔV
– =100mV
140
120
100
80
SENSE
V
= 4V
V
OUT
5.5V
5V
T
= 25°C
A
LTC6101,
V+ = 12V
LTC6101HV,
R
R
V
= 100
+
IN
V
= 12V
= 5k
OUT
+ = V+
SENSE
60
R
R
C
= 100
IN
= 10k
= 5pF
OUT
OUT
GAIN = 100
40
I
= 100μ
OUT
LTC6101HV,
+
20
I
= 100μA
= 50mVp
V = 5V
OUTDC
0.5V
0V
I
= 0
OUT
V
INAC
0
0.1
1
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
TIME (500ns/DIV)
6101 G19
6101 G17
6101fh
8
LTC6101/LTC6101HV
PIN FUNCTIONS
OUT: Current Output. OUT will source a current that is
proportional to the sense voltage into an external resistor.
+
V : Positive Supply Pin. Supply current is drawn through
this pin. The circuit may be configured so that the
LTC6101 supply current is or is not monitored along
with the system load current. To monitor only system
–
V : Negative Supply (or Ground for Single-Supply
Operation).
+
load current, connect V to the more positive side of the
–
+
–IN:TheinternalsenseamplifierwilldriveIN tothesame
sense resistor. To monitor the total current, including the
+
–
+
potential as IN . A resistor (R ) tied from V to IN sets
LTC6101 current, connect V to the more negative side
IN
theoutputcurrentI =V
/R . V
SENSE IN SENSE
isthevoltage
(Figure 1).
of the sense resistor.
OUT
developed across the external R
SENSE
+IN: Must be tied to the system load end of the sense
resistor, either directly or through a resistor.
BLOCK DIAGRAM
I
LOAD
V
SENSE
+
–
V
BATTERY
+
V
R
SENSE
R
IN
10V
L
O
A
D
–IN
+IN
5k
5k
–
+
I
10V
OUT
R
R
OUT
OUT
V
OUT
= V
SENSE
x
–
IN
V
LTC6101/LTC6101HV
R
OUT
6101 BD
Figure 1. LTC6101/LTC6101HV Block Diagram and Typical Connection
APPLICATIONS INFORMATION
–
+
The LTC6101 high side current sense amplifier (Figure 1)
provides accurate monitoring of current through a user-
selected sense resistor. The sense voltage is amplified by
a user-selected gain and level shifted from the positive
power supply to a ground-referred output. The output
signal is analog and may be used as is or processed with
an output filter.
tor, R , between IN and V forces a potential across
IN
R
R
that is the same as the sense voltage across
. A corresponding current, V
flow through R . The high impedance inputs of the
sense amplifier will not conduct this input current,
soitwillflowthroughaninternalMOSFETtotheoutputpin.
IN
/R , will
SENSE IN
SENSE
IN
The output current can be transformed into a voltage by
adding a resistor from OUT to V . The output voltage is
–
Theory of Operation
–
then V = V + I
• R
.
–
O
OUT
OUT
An internal sense amplifier loop forces IN to have the
+
same potential as IN . Connecting an external resis-
6101fh
9
LTC6101/LTC6101HV
APPLICATIONS INFORMATION
Useful Gain Configurations
Peak dissipation is 200mW. If a 5mΩ sense resistor is
employed, then the effective current error is 30mA, while
the peak sense voltage is reduced to 10mV at 2A, dis-
sipating only 20mW.
Gain
20
R
R
V
at V
= 5V
I
at V
= 5V
IN
OUT
SENSE
OUT
OUT
OUT
499
200
100
10k
10k
10k
250mV
100mV
50mV
500μA
500μA
500μA
50
The low offset and corresponding large dynamic range of
the LTC6101 make it more flexible than other solutions in
this respect. The 150μV typical offset gives 60dB of dy-
namic range for a sense voltage that is limited to 150mV
max, and over 70dB of dynamic range if the rated input
maximum of 500mV is allowed.
100
Selection of External Current Sense Resistor
Theexternalsenseresistor,R ,hasasignificanteffect
SENSE
on the function of a current sensing system and must be
chosen with care.
Sense Resistor Connection
First, the power dissipation in the resistor should be
considered. The system load current will cause both heat
–
+
Kelvin connection of the IN and IN inputs to the sense
resistor should be used in all but the lowest power ap-
plications. Solder connections and PC board interconnec-
tions that carry high current can cause significant error
in measurement due to their relatively large resistances.
One 10mm x 10mm square trace of one-ounce copper
is approximately 0.5mΩ. A 1mV error can be caused by
as little as 2A flowing through this small interconnect.
This will cause a 1% error in a 100mV signal. A 10A load
current in the same interconnect will cause a 5% error
for the same 100mV signal. By isolating the sense traces
from the high-current paths, this error can be reduced
by orders of magnitude. A sense resistor with integrated
Kelvin sense terminals will give the best results. Figure 2
illustrates the recommended method.
and voltage loss in R
. As a result, the sense resis-
SENSE
tor should be as small as possible while still providing
the input dynamic range required by the measurement.
Note that input dynamic range is the difference between
the maximum input signal and the minimum accurately
reproduced signal, and is limited primarily by input DC
offset of the internal amplifier of the LTC6101. In addition,
R
mustbesmallenoughthatV
doesnotexceed
SENSE
SENSE
themaximuminputvoltagespecifiedbytheLTC6101,even
under peak load conditions. As an example, an application
may require that the maximum sense voltage be 100mV.
If this application is expected to draw 2A at peak load,
R
should be no more than 50mΩ.
SENSE
Once the maximum R
value is determined, the mini-
SENSE
+
mum sense resistor value will be set by the resolution or
dynamic range required. The minimum signal that can be
accurately represented by this sense amp is limited by the
input offset. As an example, the LTC6101B has a typical
input offset of 150μV. If the minimum current is 20mA, a
V
R
IN
R
SENSE
+IN
–IN
–
+
sense resistor of 7.5mΩ will set V
to 150μV. This is
SENSE
LOAD
the same value as the input offset. A larger sense resistor
will reduce the error due to offset by increasing the sense
voltage for a given load current.
–
+
V
V
Choosinga50mΩR
willmaximizethedynamicrange
SENSE
OUT
V
LTC6101
OUT
and provide a system that has 100mV across the sense
resistor at peak load (2A), while input offset causes an
error equivalent to only 3mA of load current.
R
OUT
6101 F02
Figure 2. Kelvin Input Connection Preserves
Accuracy Despite Large Load Current
6101fh
10
LTC6101/LTC6101HV
APPLICATIONS INFORMATION
+
Selection of External Input Resistor, R
V
IN
The external input resistor, R , controls the transconduc-
IN
tanceofthecurrentsensecircuit. SinceI =V
/R ,
R
SENSE
D
SENSE
OUT
SENSE IN
IN
transconductance g = 1/R . For example, if R = 100,
6101 F03a
m
IN
then I = V
/100 or I = 1mA for V = 100mV.
OUT
SENSE
OUT
SENSE
LOAD
R
should be chosen to allow the required resolution
IN
Figure 3a. Shunt Diode Limits Maximum Input Voltage to Allow
Better Low Input Resolution Without Overranging
while limiting the output current. At low supply voltage,
may be as much as 1mA. By setting R such that
I
OUT
IN
the largest expected sense voltage gives I
= 1mA, then
This approach can be helpful in cases where occasional
large burst currents may be ignored. It can also be used
in a multirange configuration where a low current circuit
is added to a high current circuit (Figure 3b). Note that
a comparator (LTC1540) is used to select the range, and
OUT
the maximum output dynamic range is available. Output
dynamic range is limited by both the maximum allowed
outputcurrentandthemaximumallowedoutputvoltage,as
wellastheminimumpracticaloutputsignal.Iflessdynamic
range is required, then R can be increased accordingly,
transistor M1 limits the voltage across R
.
IN
SENSE LO
reducing the max output current and power dissipation.
Care should be taken when designing the board layout
If low sense currents must be resolved accurately in a
for R especially for small R values. All trace and inter-
IN,
IN
system that has very wide dynamic range, a smaller R
IN
connect impedances will increase the effective R value,
IN
than the max current spec allows may be used if the max
causing a gain error. In addition, internal device resistance
current is limited in another way, such as with a Schottky
will add approximately 0.2Ω to R .
IN
diode across R
(Figure 3a). This will reduce the high
SENSE
currentmeasurementaccuracybylimitingtheresult,while
increasing the low current measurement resolution.
V
LOGIC
CMPZ4697
10k
(3.3V TO 5V)
7
3
4
M1
+
–
Si4465
V
IN
R
SENSE HI
10m
I
LOAD
8
Q1
CMPT5551
5
6
V
OUT
40.2k
R
SENSE LO
100m
301
+IN
301
–IN
301
+IN
301
–IN
4.7k
1.74M
LTC1540
2
1
HIGH
–
+
–
+
+
+
–
–
V
V
V
V
RANGE
V
IN
619k
INDICATOR
(I
> 1.2A)
LOAD
OUT
OUT
HIGH CURRENT RANGE OUT
250mV/A
LTC6101
LTC6101
7.5k
V
LOGIC
BAT54C
LOW CURRENT RANGE OUT
2.5V/A
R
5
(
V
+5V
)
≤ V ≤ 60V
LOGIC
IN
7.5k
6101 F03b
0 ≤ I
≤ 10A
LOAD
Figure 3b. Dual LTC6101s Allow High-Low Current Ranging
6101fh
11
LTC6101/LTC6101HV
APPLICATIONS INFORMATION
Selection of External Output Resistor, R
Output Error, E , Due to the Amplifier DC Offset
OUT
OUT
Voltage, V
OS
The output resistor, R , determines how the output cur-
OUT
E
= V • (R /R )
OS OUT IN
rent is converted to voltage. V
is simply I
• R
.
OUT(VOS)
OUT
OUT
OUT
The DC offset voltage of the amplifier adds directly to the
value of the sense voltage, V . This is the dominant
error of the system and it limits the available dynamic
range.Theparagraph“SelectionofExternalCurrentSense
Resistor” provides details.
In choosing an output resistor, the max output voltage
must first be considered. If the circuit that is driven by
SENSE
the output does not limit the output voltage, then R
OUT
must be chosen such that the max output voltage does
not exceed the LTC6101 max output voltage rating. If the
followingcircuitisabufferorADCwithlimitedinputrange,
Output Error, E , Due to the Bias Currents,
OUT
then R
must be chosen so that I
• R
is less
OUT
OUT(MAX)
OUT
I (+) and I (–)
B
B
than the allowed maximum input range of this circuit.
The bias current I (+) flows into the positive input of the
B
Inaddition,theoutputimpedanceisdeterminedbyR .If
OUT
internal op amp. I (–) flows into the negative input.
B
the circuit to be driven has high enough input impedance,
then almost any useful output impedance will be accept-
able. However, if the driven circuit has relatively low input
impedance, or draws spikes of current, such as an ADC
E
= R ((I (+) • (R
/R ) – I (–))
SENSE IN B
OUT(IBIAS)
OUT
B
Since I (+) ≈ I (–) = I
, if R << R then,
BIAS SENSE IN
B
B
E
≈ –R
• I
mightdo,thenalowerR
valuemayberequiredinorder
OUT(IBIAS)
OUT BIAS
OUT
to preserve the accuracy of the output. As an example, if
theinputimpedanceofthedrivencircuitis100timesR
For instance if I
error is 0.1mV.
is 100nA and R
is 1kΩ, the output
OUT
BIAS
,
OUT
then the accuracy of V
will be reduced by 1% since:
OUT
Note that in applications where R
≈ R , I (+) causes
IN B
SENSE
ROUT •RIN(DRIVEN)
a voltage offset in R
that cancels the error due to
VOUT =IOUT •
SENSE
R
OUT +RIN(DRIVEN)
I (–) and E
B
≈ 0. In applications where R
<
OUT(IBIAS)
SENSE
R , the bias current error can be similarly reduced if an
IN
100
101
=IOUT •ROUT
•
=0.99 •IOUT •ROUT
external resistor R (+) = (R – R ) is connected as
IN
IN
SENSE
shown in Figure 4 below. Under both conditions:
Error Sources
E
=
R • I ; I = I (+) – I (–)
OUT OS OS B B
OUT(IBIAS)
The current sense system uses an amplifier and resistors
to apply gain and level shift the result. The output is then
dependent on the characteristics of the amplifier, such as
gain and input offset, as well as resistor matching.
+
V
–
R
R
IN
R
SENSE
+
IN
Ideally, the circuit output is:
+IN
–IN
–
+
R
RIN
VOUT = VSENSE
•
OUT ;VSENSE =RSENSE •ISENSE
LOAD
–
+
V
V
In this case, the only error is due to resistor mismatch,
which provides an error in gain only. However, offset
voltage, bias current and finite gain in the amplifier cause
additional errors:
OUT
V
LTC6101
OUT
R
OUT
6101 F04
+
–
R
=
R
– R
IN SENSE
IN
Figure 4. Second Input R Minimizes
Error Due to Input Bias Current
6101fh
12
LTC6101/LTC6101HV
APPLICATIONS INFORMATION
If the offset current, I , of the LTC6101 amplifier is 2nA,
The total power dissipated is the output dissipation plus
the quiescent dissipation:
OS
the 100 microvolt error above is reduced to 2 microvolts.
+
Adding R
as described will maximize the dynamic
IN
P
TOTAL
= P + P
OUT Q
+
range of the circuit. For less sensitive designs, R is
not necessary.
IN
At maximum supply and maximum output current, the
total power dissipation can exceed 100mW. This will
cause significant heating of the LTC6101 die. In order to
prevent damage to the LTC6101, the maximum expected
dissipation in each application should be calculated. This
Example:
If an I
3V/1A
range = (1A to 1mA) and (V /I
) =
SENSE
OUT SENSE
number can be multiplied by the θ value listed in the
JA
Then, from the Electrical Characteristics of the LTC6101,
≈ V (max) / I (max) = 500mV/1A =
package section on page 2 to find the maximum expected
dietemperature.Thismustnotbeallowedtoexceed150°C,
or performance may be degraded.
R
SENSE
500mΩ
SENSE
SENSE
Gain = R /R = V
(max) / V
(max) =
SENSE
OUT IN
3V/500mV = 6
OUT
As an example, if an LTC6101 in the S5 package is to be
run at 55V 5V supply with 1mA output current at 80°C:
If the maximum output current, I , is limited to 1mA,
OUT
+
P
P
= I
• V
= 41.4mW
(MAX)
Q(MAX)
DD(MAX)
R
equals 3V/1mA ≈ 3.01 kΩ (1% value) and R =
OUT
IN
+
3kΩ/6 ≈ 499Ω (1% value).
= I
• V
= 60mW
(MAX)
OUT(MAX)
OUT
The output error due to DC offset is 900μVolts (typ) and
T
T
T
= θ • P
JA TOTAL(MAX)
RISE
MAX
MAX
the error due to offset current, I is 3k x 2nA = 6μVolts
OS
= T
+ T
RISE
AMBIENT
+
–
(typical), provided R = R
.
IN
IN
must be < 150°C
≈ 96mW and the max die temp
Themaximumoutputerrorcanthereforereach 906μVolts
or 0.03% (–70dB) of the output full scale. Considering
P
TOTAL(MAX)
will be 104°C
the system input 60dB dynamic range (I
= 1mA to
SENSE
1A), the 70dB performance of the LTC6101 makes this
application feasible.
If this same circuit must run at 125°C, the max die
temp will increase to 150°C. (Note that supply current,
and therefore P , is proportional to temperature. Refer
Q
Output Error, E , Due to the Finite DC Open Loop
OUT
to Typical Performance Characteristics section.) In this
condition,themaximumoutputcurrentshouldbereduced
to avoid device damage. Note that the MSOP package
Gain, A , of the LTC6101 Amplifier
OL
This error is inconsequential as the A of the LTC6101
OL
is very large.
has a larger θ than the S5, so additional care must be
JA
taken when operating the LTC6101A/LTC6101HVA at high
Output Current Limitations Due to Power Dissipation
temperatures and high output currents.
The LTC6101 can deliver up to 1mA continuous current to
The LTC6101HV can be used at voltages up to 105V. This
additional voltage requires that more power be dissipated
foragivenlevelofcurrent.Thiswillfurtherlimittheallowed
output current at high ambient temperatures.
theoutputpin.ThiscurrentflowsthroughR andentersthe
IN
current sense amp via the IN(–) pin. The power dissipated
in the LTC6101 due to the output signal is:
P
= (V – V ) • I
–IN OUT OUT
OUT
It is important to note that the LTC6101 has been designed
to provide at least 1mA to the output when required, and
can deliver more depending on the conditions. Care must
be taken to limit the maximum output current by proper
choice of sense resistor and, if input fault conditions exist,
+
+
Since V ≈ V , P
≈ (V – V ) • I
OUT OUT
–IN
OUT
There is also power dissipated due to the quiescent sup-
ply current:
+
external clamps.
P = I • V
Q
DD
6101fh
13
LTC6101/LTC6101HV
APPLICATIONS INFORMATION
Output Filtering
Input Common Mode Range
The output voltage, V , is simply I
• Z . This
The inputs of the LTC6101 can function from 1.5V below
the positive supply to 0.5V above it. Not only does this
OUT
OUT
OUT
makes filtering straightforward. Any circuit may be used
which generates the required Z to get the desired filter
allow a wide V
range, it also allows the input refer-
OUT
SENSE
response. For example, a capacitor in parallel with R
ence to be separate from the positive supply (Figure 5).
OUT
+
will give a low pass response. This will reduce unwanted
noise from the output, and may also be useful as a charge
reservoir to keep the output steady while driving a switch-
ing circuit such as a mux or ADC. This output capacitor
in parallel with an output resistor will create a pole in the
output response at:
Note that the difference between V
and V must be no
BATT
more than the common mode range listed in the Electrical
Characteristics table. If the maximum V is less than
SENSE
500mV, the LTC6101 may monitor its own supply current,
as well as that of the load (Figure 6).
V
BATTERY
1
f–3dB
=
R
2• π •ROUT •COUT
IN
R
SENSE
+IN
–IN
–
+
+
Useful Equations
V
LOAD
–
+
V
V
Input Voltage: V
=I
•R
SENSE SENSE SENSE
V
R
OUT
OUT
Voltage Gain:
=
V
R
IN
OUT
SENSE
V
LTC6101
OUT
I
R
SENSE
R
OUT
OUT
Current Gain:
I
=
R
6101 F05
SENSE
IN
I
1
OUT
Figure 5. V+ Powered Separately from
Load Supply (VBATT
Transconductance:
=
V
R
IN
SENSE
)
V
R
OUT
OUT
Transimpedance:
=R
•
SENSE
I
R
IN
SENSE
+
V
R
IN
R
SENSE
+IN
–IN
–
+
–
+
LOAD
V
V
OUT
V
LTC6101
OUT
R
OUT
6101 F06
Figure 6. LTC6101 Supply Current
Monitored with Load
6101fh
14
LTC6101/LTC6101HV
APPLICATIONS INFORMATION
Reverse Supply Protection
If the output current is very low and an input transient
occurs, there may be an increased delay before the output
voltagebeginschanging.Thiscanbeimprovedbyincreas-
ing the minimum output current, either by increasing
Some applications may be tested with reverse-polarity
supplies due to an expectation of this type of fault during
operation. The LTC6101 is not protected internally from
externalreversalofsupplypolarity.Topreventdamagethat
may occur during this condition, a Schottky diode should
R
or decreasing R . The effect of increased output
SENSE
IN
current is illustrated in the step response curves in the
Typical Performance Characteristics section of this data
sheet. Note that the curves are labeled with respect to the
initial output currents.
–
be added in series with V (Figure 7). This will limit the
reverse current through the LTC6101. Note that this diode
will limit the low voltage performance of the LTC6101 by
The speed is also affected by the external circuit. In this
case, if the input changes very quickly, the internal ampli-
fier will slew the gate of the internal output FET (Figure
1) in order to maintain the internal loop. This results in
effectively reducing the supply voltage to the part by V .
D
Inaddition, iftheoutputoftheLTC6101iswiredtoadevice
thatwilleffectivelyshortittohighvoltage(suchasthrough
an ESD protection clamp) during a reverse supply condi-
tion, the LTC6101’s output should be connected through
a resistor or Schottky diode (Figure 8).
current flowing through R and the internal FET. This
IN
current slew rate will be determined by the amplifier and
FET characteristics as well as the input resistor, R . Us-
IN
ing a smaller R will allow the output current to increase
IN
Response Time
more quickly, decreasing the response time at the output.
The LTC6101 is designed to exhibit fast response to inputs
forthepurposeofcircuitprotectionorsignaltransmission.
This response time will be affected by the external circuit
in two ways, delay and speed.
This will also have the effect of increasing the maximum
output current. Using a larger R
will decrease the re-
OUT
sponse time, since V
= I
• R . Reducing R and
OUT OUT OUT IN
increasing R
will both have the effect of increasing the
OUT
voltage gain of the circuit.
R
SENSE
R
SENSE
R1
100
R1
100
V
BATT
+IN
–IN
+IN
–IN
–
+
–
+
+
L
O
A
D
+
L
–
V
V
–
V
V
O
A
D
V
BATT
R3
1k
OUT
OUT
LTC6101
D1
ADC
LTC6101
R2
4.99k
D1
R2
4.99k
6101 F08
6101 F07
Figure 8. Additional Resistor R3 Protects
Output During Supply Reversal
Figure 7. Schottky Prevents Damage During Supply Reversal
6101fh
15
LTC6101/LTC6101HV
TYPICAL APPLICATIONS
Bidirectional Current Sense Circuit with Separate Charge/Discharge Output
I
I
CHARGE
DISCHARGE
R
SENSE
CHARGER
R
IN C
R
IN D
100
100
R
R
IN C
100
IN D
100
+IN
–IN
–IN
+IN
V
BATT
–
+
+
–
+
+
–
–
V
V
V
V
L
O
A
D
OUT
OUT
LTC6101
LTC6101
+
OUT D
–
+
R
R
OUT C
4.99k
OUT D
4.99k
V
V
OUT C
–
6101 TA02
R
R
OUT D
DISCHARGING: V
CHARGING: V
= I
• R
WHEN I
≥ 0
OUT D DISCHARGE
SENSE
R
DISCHARGE
(
)
IN D
OUT C
= I
• R
WHEN I
≥ 0
OUT C CHARGE
SENSE
CHARGE
R
IN C
LTC6101 Monitors Its Own Supply Current
High-Side-Input Transimpedance Amplifier
V
S
I
LOAD
R
SENSE
CMPZ4697*
(10V)
LASER MONITOR
PHOTODIODE
i
PD
I
R1
100
SUPPLY
+IN
–IN
4.75k
4.75k
10k
+IN
–IN
L
O
A
D
–
+
+
–
V
V
–
+
+
–
V
V
V
BATT
OUT
LTC6101
+
–
OUT
R2
4.99k
V
LTC6101
OUT
V
O
R
L
6101 TA03
V
= I • R
L
6101 TA04
O
PD
V
= 49.9 • R
(
I
+ I
)
*V SETS PHOTODIODE BIAS
OUT
SENSE LOAD SUPPLY
Z
V
+ 4 ≤ V ≤ V + 60
S Z
Z
6101fh
16
LTC6101/LTC6101HV
TYPICAL APPLICATIONS
16-Bit Resolution Unidirectional Output into LTC2433 ADC
I
V
LOAD
SENSE
+
–
R
IN
4V TO 60V
100Ω
+IN
–IN
L
O
A
D
–
+
+
–
V
V
1μF
5V
2
1
+
V
OUT
REF
V
OUT
4
5
CC
9
8
7
+
LTC6101
IN
SCK
SDD
LTC2433-1
TO μP
R
OUT
–
IN
C
C
4.99k
–
F
REF GND
O
3
6
10
R
R
OUT
6101 TA06
V
=
• V
= 49.9V
SENSE
ADC FULL-SCALE = 2.5V
OUT
SENSE
IN
Intelligent High-Side Switch with Current Monitor
10μF
63V
V
LOGIC
14V
47k
+
V
100Ω
1%
3
FAULT
8
6
–IN
+IN
OUT
4
2
R
S
LT1910
1
LTC6101
V
O
OFF ON
1μF
100Ω
4.99k
–
V
5
SUB85N06-5
V
= 49.9 • R • I
S L
O
L
O
A
D
I
L
FOR R = 5mΩ,
V
S
= 2.5V AT I = 10A (FULL SCALE)
L
O
6101 TA07
6101fh
17
LTC6101/LTC6101HV
TYPICAL APPLICATIONS
48V Supply Current Monitor with Isolated Output with 105V Survivability
I
V
R
SENSE
SENSE
–
+
V
S
LOAD
SENSE
R
IN
–IN
+IN
+
–
–
+
V
V
–
V
LTC6101HV
LOGIC
OUT
V
R
OUT
V
OUT
ANY OPTOISOLATOR
–
V
N = OPTOISOLATOR CURRENT GAIN
R
SENSE
V
= V
I
•
• N • R
OUT
OUT
LOGIC – SENSE
6101 TA08
R
IN
Simple 500V Current Monitor
DANGER! Lethal Potentials Present — Use Caution
I
V
SENSE
500V
SENSE
SENSE
+
–
R
R
IN
100Ω
+IN
–IN
L
O
A
D
–
+
DANGER!!
HIGH VOLTAGE!!
+
–
V
V
OUT
62V
CMZ5944B
LTC6101
M1
V
OUT
M2
R
OUT
M1 AND M2 ARE FQD3P50 TM
2M
4.99k
R
OUT
V
=
• V
= 49.9 V
SENSE SENSE
OUT
R
IN
6101 TA09
6101fh
18
LTC6101/LTC6101HV
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660 Rev F)
0.889 0.127
(.035 .005)
5.23
3.20 – 3.45
(.206)
(.126 – .136)
MIN
3.00 0.102
(.118 .004)
(NOTE 3)
0.52
(.0205)
REF
0.65
(.0256)
BSC
0.42 0.038
(.0165 .0015)
TYP
8
7 6
5
RECOMMENDED SOLDER PAD LAYOUT
3.00 0.102
(.118 .004)
(NOTE 4)
4.90 0.152
(.193 .006)
DETAIL “A”
0.254
(.010)
0° – 6° TYP
GAUGE PLANE
1
2
3
4
0.53 0.152
(.021 .006)
1.10
(.043)
MAX
0.86
(.034)
REF
DETAIL “A”
0.18
(.007)
SEATING
PLANE
0.22 – 0.38
0.1016 0.0508
(.009 – .015)
(.004 .002)
0.65
(.0256)
BSC
TYP
MSOP (MS8) 0307 REV F
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
6101fh
19
LTC6101/LTC6101HV
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
S5 Package
5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
0.62
MAX
0.95
REF
2.90 BSC
(NOTE 4)
1.22 REF
1.4 MIN
1.50 – 1.75
(NOTE 4)
2.80 BSC
3.85 MAX 2.62 REF
PIN ONE
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45 TYP
5 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
DATUM ‘A’
0.01 – 0.10
1.00 MAX
0.30 – 0.50 REF
1.90 BSC
0.09 – 0.20
(NOTE 3)
NOTE:
S5 TSOT-23 0302 REV B
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
6101fh
20
LTC6101/LTC6101HV
REVISION HISTORY (Revision history begins at Rev H)
REV
DATE
03/12 Updated Features
Updated Absolute Maximum Ratings and changed Order Information
Changed operating temperature range to specified temperature range in Electrical Characteristics header
Changed T value in curve G02 from 45°C to 25°C
DESCRIPTION
PAGE NUMBER
H
1
2
4, 5
6
A
6101fh
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.
21
LTC6101/LTC6101HV
TYPICAL APPLICATION
Bidirectional Current Sense Circuit with Combined Charge/Discharge Output
I
I
CHARGE
DISCHARGE
R
SENSE
CHARGER
R
IN C
R
IN D
R
R
IN D
IN C
+IN
–IN
–IN
+IN
V
BATT
–
+
+
–
+
+
–
–
V
V
V
V
L
O
A
D
OUT
OUT
LTC6101
LTC6101
+
OUT
V
R
OUT
–
6101 TA05
R
R
OUT
IN D
DISCHARGING: V
CHARGING: V
= I
• R
WHEN I
≥ 0
OUT DISCHARGE
SENSE
DISCHARGE
(
)
R
OUT
IN C
= I
• R
WHEN I
≥ 0
OUT CHARGE
SENSE
CHARGE
R
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
V Extends 44V above V , 55μA Supply Current,
CM
LT1636
Rail-to-Rail Input/Output, Micropower Op Amp
EE
Shutdown Function
LT1637/LT1638/
LT1639
Single/Dual/Quad, Rail-to-Rail, Micropower Op Amp
V
CM
Extends 44V above V , 0.4V/μs Slew Rate, >1MHz
EE
Bandwidth, <250μA Supply Current per Amplifier
LT1787/LT1787HV Precision, Bidirectional, High Side Current Sense Amplifier 2.7V to 60V Operation, 75μV Offset, 60μA Current Draw
LTC1921
LT1990
LT1991
Dual –48V Supply and Fuse Monitor
200V Transient Protection, Drives Three Optoisolators for Status
250V Common Mode, Micropower, Pin Selectable Gain = 1, 10
2.7V to 18V, Micropower, Pin Selectable Gain = –13 to 14
3μV Offset, 30nV/°C Drift, Input Extends Down to V–
High Voltage, Gain Selectable Difference Amplifier
Precision, Gain Selectable Difference Amplifier
LTC2050/LTC2051/ Single/Dual/Quad Zero-Drift Op Amp
LTC2052
LTC4150
LT6100
Coulomb Counter/Battery Gas Gauge
Indicates Charge Quantity and Polarity
Gain-Selectable High-Side Current Sense Amplifier
4.1V to 48V Operation, Pin-Selectable Gain: 10, 12.5, 20, 25, 40, 50V/V
6101fh
LT 0312 REV H • PRINTED IN USA
LinearTechnology Corporation
22 1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
© LINEAR TECHNOLOGY CORPORATION 2005
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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