LTC6101CCS5#TRPBF_技术文档

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; 300μV Max offset

and only 375μA (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)

n

Gain Conﬁgurable with 2 Resistors

Low Input Bias Current: 170nA Max

PSRR: 118dB Min

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.

Output Current: 1mA Max

Low Supply Current: 250μA, V = 12V

S

Speciﬁed Temperature Range: –40°C to 125°C

Operating Temperature Range: –55°C to 125°C

Package Option for High Voltage Spacing

Low Proﬁle (1mm) SOT-23 (ThinSOT™) Package

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

All registered trademarks and 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

+

–

ꢘ

ꢂ

ꢖꢗꢒꢖꢗ

R

IN

100Ω

5V TO 105V

Δꢂ

ꢖꢗꢒꢖꢗ

^ꢘꢍ ꢉꢃꢃꢙꢂ

+IN

–IN

ꢀꢁꢀꢂ

ꢀꢂ

L

O

A

D

–

+

–

V

ꢊ

ꢍ ꢎꢀꢏꢐ

^ꢑꢍ ꢉꢎꢂ

ꢋ

ꢂ

1µF

5V

R

ꢂ

ꢍ ꢉꢃꢃ

ꢍ ꢀꢕ

Iꢒ

ꢓꢔꢊ

ꢂ

ꢓꢔꢊ

^ꢑꢍ ꢂ^ꢑ

V

OUT

ꢖꢗꢒꢖꢗ

OUT

LTC6101HV

I

ꢍ ꢉꢃꢃꢚꢋ

ꢍ ꢃ

ꢓꢔꢊ

LTC2433-1

TO µP

ꢃꢁꢀꢂ

ꢃꢂ

R

I

ꢓꢔꢊ

OUT

4.99k

ꢀꢃꢃꢄꢅꢆꢇIꢂ

6101 TA01

ꢈꢉꢃꢉ ꢊꢋꢃꢉꢌ

R

OUT

V

=

• V

= 49.9V

SENSE SENSE

OUT

IN

Rev I

1

Document Feedback

For more information www.analog.com

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

VHV PINOUT

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ꢌ ꢆꢝꢅ

ꢕ

ꢄIꢅ

ꢅꢆ

ꢀ

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ꢂ

ꢃ

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ꢋ ꢏ

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ꢅ

ꢋ ꢄ

ꢎ

ꢃIꢁ ꢄ

ꢀ

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ꢃ

ꢈ

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ꢇꢈꢉ

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ꢓꢔꢊ ꢐꢕꢆꢖꢕꢗꢑ

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ꢕꢖꢍꢗ

ꢊꢘꢙꢑꢕꢚ ꢐꢙꢕꢔꢉIꢆ ꢓꢔꢇꢐ

JMAX

ꢋꢐꢑꢈꢌꢒ ꢇꢑꢌꢊꢂIꢍ ꢂꢊꢀꢂꢐꢆꢓ

JMAX

T

= 150°C, θ = 300°C/ W

ꢅ

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JA

ꢕꢍ

T

= 150°C, θ = 250°C/ W

JA

ORDER INFORMATION http://www.linear.com/product/LTC6101#orderinfo

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

LTBSB

PACKAGE DESCRIPTION

8-Lead Plastic MSOP

SPECIFIED TEMPERATURE RANGE

0°C to 70°C

LTC6101ACMS8#PBF

LTC6101AIMS8#PBF

LTC6101AHMS8#PBF

LTC6101HVACMS8#PBF

LTC6101HVAIMS8#PBF

LTC6101ACMS8#TRPBF

LTC6101AIMS8#TRPBF

LTC6101AHMS8#TRPBF

LTBSB

–40°C to 85°C

LTBSB

–40°C to 125°C

0°C to 70°C

LTC6101HVACMS8#TRPBF LTBSX

LTC6101HVAIMS8#TRPBF LTBSX

–40°C to 85°C

LTC6101HVAHMS8#PBF LTC6101HVAHMS8#TRPBF LTBSX

–40°C to 125°C

Rev I

2

For more information www.analog.com

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* 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

LTBND

LTBSZ

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

–40°C to 85°C

–40°C to 125°C

0°C to 70°C

LTC6101HVAHS5#TRMPBF LTC6101HVAHS5#TRPBF

LTC6101HVBCS5#TRMPBF LTC6101HVBCS5#TRPBF

LTC6101HVBIS5#TRMPBF

LTC6101HVBIS5#TRPBF

–40°C to 85°C

–40°C to 125°C

0°C to 70°C

LTC6101HVBHS5#TRMPBF LTC6101HVBHS5#TRPBF

LTC6101HVCCS5#TRMPBF LTC6101HVCCS5#TRPBF

LTC6101HVCIS5#TRMPBF

LTC6101HVCHS5#TRMPBF LTC6101HVCHS5#TRPBF

LTC6101VHVACS5#TRMPBF LTC6101VHVACS5#TRPBF LTHHD

LTC6101VHVAIS5#TRMPBF LTC6101VHVAIS5#TRPBF LTHHD

LTC6101HVCIS5#TRPBF

–40°C to 85°C

–40°C to 125°C

5-Lead Plastic TSOT-23 HV Pinout 0°C to 70°C

5-Lead Plastic TSOT-23 HV Pinout –40°C to 85°C

5-Lead Plastic TSOT-23 HV Pinout –40°C to 125°C

5-Lead Plastic TSOT-23 HV Pinout 0°C to 70°C

5-Lead Plastic TSOT-23 HV Pinout –40°C to 85°C

5-Lead Plastic TSOT-23 HV Pinout –40°C to 125°C

5-Lead Plastic TSOT-23 HV Pinout 0°C to 70°C

5-Lead Plastic TSOT-23 HV Pinout –40°C to 85°C

5-Lead Plastic TSOT-23 HV Pinout –40°C to 125°C

LTC6101VHVAHS5#TRMPBF LTC6101VHVAHS5#TRPBF LTHHD

LTC6101VHVBCS5#TRMPBF LTC6101VHVBCS5#TRPBF LTHHD

LTC6101VHVBIS5#TRMPBF LTC6101VHVBIS5#TRPBF

LTHHD

LTC6101VHVBHS5#TRMPBF LTC6101VHVBHS5#TRPBF LTHHD

LTC6101VHVCCS5#TRMPBF LTC6101VHVCCS5#TRPBF LTHHD

LTC6101VHVCIS5#TRMPBF LTC6101VHVCIS5#TRPBF

LTHHD

LTC6101VHVCHS5#TRMPBF LTC6101VHVCHS5#TRPBF LTHHD

TRM = 500 pieces. *Temperature grades are identiﬁed by a label on the shipping container.

Consult ADI Marketing for parts speciﬁed with wider operating temperature ranges.

Consult ADI 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/

Rev I

3

For more information www.analog.com

LTC6101/LTC6101HV

ELECTRICAL CHARACTERISTICS ^{(LTC6101) The}● denotes the speciﬁcations which apply over the full

speciﬁed temperature range, otherwise speciﬁcations are at T_A= 25°C, R_IN= 100Ω, R_OUT= 10k, V_SENSE⁺= V⁺(see Figure 1 for

details), 4V ≤ V_S≤ 60V unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

V

Supply Voltage Range

Input Offset Voltage

●

4

60

V

S

V

OS

V

SENSE

V

SENSE

V

SENSE

= 5mV, Gain = 100, LTC6101A

= 5mV, Gain = 100, LTC6101AC, LTC6101AI

= 5mV, Gain = 100, LTC6101AH

85

300

450

535

µV

●

V

= 5mV, Gain = 100, LTC6101B

150

400

450

810

µV

SENSE

●

V

SENSE

= 5mV, Gain = 100, LTC6101C

800

1200

µV

∆V /∆T

Input Offset Voltage Drift

Input Bias Current

V

= 5mV, LTC6101A

= 5mV, LTC6101B

= 5mV, LTC6101C

●

1

3

5

µV/°C

OS

SENSE

I

R

= 1M

100

170

245

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

= 88mV

118

115

140

133

dB

SENSE

●

V = 4V to 60V, V

S

110

105

dB

SENSE

●

V

Maximum Output Voltage

Minimum Output Voltage

12V ≤ V ≤ 60V, V

●

8

3

1

V

OUT

S

SENSE

V = 6V, V

= 330mV, R = 1k, R

= 550mV, R = 1k, R

= 10k

= 2k

S

SENSE

IN

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

OUT (0)

●

V

= 0V, Gain = 100, LTC6101B

0

45

81

mV

SENSE

●

V

SENSE

= 0V, Gain = 100, LTC6101C

150

250

mV

I

t

Maximum Output Current

6V ≤ V ≤ 60V, R

= 2k, V = 110mV, Gain = 20

SENSE

●

1

0.5

mA

OUT

S

OUT

V = 4V, V

S

= 550mV, Gain = 2, R = 2k

SENSE

OUT

Input Step Response

(to 2.5V on a 5V Output Step)

∆V

SENSE

= 100mV Transient, 6V ≤ V ≤ 60V, Gain = 50

1

1.5

µs

r

S

V = 4V

S

BW

Signal Bandwidth

I

= 200μA, R = 100, R = 5k

OUT

140

200

kHz

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

S

OUT

IN

●

V = 6V, I

S

= 0, R = 1M

475

525

µA

IN

V = 12V, I

S

= 0, R = 1M

500

590

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

Rev I

4

For more information www.analog.com

LTC6101/LTC6101HV

ELECTRICAL CHARACTERISTICS ^{(LTC6101HV) The}● denotes the speciﬁcations which apply over the full

speciﬁed temperature range, otherwise speciﬁcations are at T_A= 25°C, R_IN= 100Ω, R_OUT= 10k, V_SENSE⁺= V⁺(see Figure 1 for

details), 5V ≤ V_S≤ 100V unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

V

Supply Voltage Range

Input Offset Voltage

●

5

100

V

S

V

OS

V

SENSE

V

SENSE

V

SENSE

= 5mV, Gain = 100, LTC6101HVA

= 5mV, Gain = 100, LTC6101HVAC, LTC6101HVAI

= 5mV, Gain = 100, LTC6101HVAH

85

300

450

535

µV

●

V

= 5mV, Gain = 100, LTC6101HVB

150

400

450

810

µV

SENSE

●

V

SENSE

= 5mV, Gain = 100, LTC6101HVC

800

1200

µV

∆V /∆T

Input Offset Voltage Drift

Input Bias Current

V

= 5mV, LTC6101HVA

= 5mV, LTC6101HVB

= 5mV, LTC6101HVC

●

1

3

5

µV/°C

OS

SENSE

I

R

= 1M

100

170

245

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

= 88mV

118

115

140

133

dB

SENSE

●

V = 5V to 100V, V

S

110

105

dB

SENSE

●

V

Maximum Output Voltage

Minimum Output Voltage

12V ≤ V ≤ 100V, V

V = 5V, V

S

●

8

3

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

OUT (0)

●

V

= 0V, Gain = 100, LTC6101HVB

0

45

81

mV

SENSE

●

V

SENSE

= 0V, Gain = 100, LTC6101HVC

150

250

mV

●

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)

∆V

V = 5V

S

= 100mV Transient, 6V ≤ V ≤ 100V, Gain = 50

1

1.5

µs

r

SENSE

S

BW

Signal Bandwidth

I

= 200μA, R = 100, R = 5k

OUT

140

200

kHz

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

S

OUT

IN

●

V = 6V, I

S

= 0, R = 1M

475

525

µA

IN

V = 12V, I

S

= 0, R = 1M

500

590

µA

OUT

IN

V = 60V, I

= 0, R = 1M

640

690

720

µA

S

OUT

IN

LTC6101HVI, LTC6101HVC

LTC6101HVH

●

V = 100V, I

S

= 0, R = 1M

350

640

µA

OUT

IN

LTC6101HVAI, LTC6101HVAC, LTC6101HVBI,

LTC6101HVBC, LTC6101HVCI, LTC6101HVCC

LTC6101HVAH, LTC6101HVBH, LTC6101HVCH

●

690

720

µA

Rev I

5

For more information www.analog.com

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 V_OSvs Temperature

Input V_OSvs Supply Voltage

Input Sense Range

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ꢑꢏꢍ ꢑꢐꢍ

ꢍ

ꢐꢍ ꢏꢍ ꢎꢍ ꢌꢍ ꢒꢍꢍ ꢒꢐꢍ

ꢃꢇꢔꢁꢇRꢕꢃꢂRꢇ ꢈꢖꢗꢋ

ꢀ ꢂꢁ ꢃꢁ ꢄꢁ ꢀꢁ ꢅꢁ ꢆꢁ ꢇꢁ ꢈꢁ ꢉꢁ ꢂꢁꢁ

ꢐꢊꢑ

ꢀ

ꢊ

ꢁꢂꢃꢃꢄꢅ

ꢋꢌꢍꢍꢎꢏ

ꢌꢎꢉꢎ ꢏꢉꢊ

ꢆꢂꢁꢂ ꢘꢁꢅ

ꢎꢒꢍꢒ ꢓꢍꢒ

LTC6101: V_OUTMaximum

vs Temperature

LTC6101HV: V_OUTMaximum

vs Temperature

LTC6101: I_OUTMaximum

vs Temperature

ꢊꢋ

ꢊꢌ

ꢍ

ꢊꢋ

ꢊꢌ

ꢍ

ꢊ

ꢔ

ꢕ

ꢖ ꢎꢌꢔ

ꢔ

ꢕ

ꢖ ꢊꢌꢌꢔ

ꢕ

ꢘ

ꢚ ꢐꢏꢘ

ꢙ

ꢋ

ꢌ

ꢍ

ꢎ

ꢏ

ꢐ

ꢑ

ꢔ

ꢖ ꢊꢋꢔ

ꢔ

ꢕ

ꢖ ꢊꢋꢔ

ꢘ

ꢚ ꢋꢑꢘ

ꢙ

ꢔ

ꢕ

ꢔ

ꢕ

ꢔ

ꢕ

ꢖ ꢎꢔ

ꢖ ꢗꢔ

ꢖ ꢏꢔ

ꢎ

ꢔ

ꢖ ꢎꢔ

ꢖ ꢏꢔ

ꢕ

ꢘ

ꢚ ꢋꢘ

ꢚ ꢍꢘ

ꢙ

ꢏ

ꢋ

ꢌ

ꢐꢏꢌ ꢐꢋꢌ

ꢌ

ꢋꢌ ꢏꢌ ꢎꢌ ꢍꢌ ꢊꢌꢌ ꢊꢋꢌ

ꢀꢁꢂꢃꢁRꢄꢀꢅRꢁ ꢆꢇꢈꢉ

ꢎꢊꢌꢊ ꢑꢌꢎ

ꢐꢏꢌ ꢐꢋꢌ

ꢌ

ꢋꢌ ꢏꢌ ꢎꢌ ꢍꢌ ꢊꢌꢌ ꢊꢋꢌ

ꢀꢁꢂꢃꢁRꢄꢀꢅRꢁ ꢆꢇꢈꢉ

ꢎꢊꢌꢊ ꢑꢋꢌ

ꢒꢍꢑ ꢒꢏꢑ

ꢑ

ꢏꢑ ꢍꢑ ꢋꢑ ꢓꢑ ꢐꢑꢑ ꢐꢏꢑ

ꢀꢁꢂꢃꢁRꢄꢀꢅRꢁ ꢆꢇꢈꢉ

ꢋꢐꢑꢐ ꢔꢑꢊ

Rev I

6

For more information www.analog.com

LTC6101/LTC6101HV

TYPICAL PERFORMANCE CHARACTERISTICS

LTC6101HV: I_OUTMaximum

vs Temperature

Output Error Due to Input Offset

vs Input Voltage

Gain vs Frequency

ꢎꢌꢌ

ꢎꢌ

ꢎ

ꢑꢒ

ꢓꢔ

ꢊ

ꢋ

ꢌ

ꢍ

ꢎ

ꢏ

ꢐ

ꢑ

ꢃ

ꢙ ꢐꢓꢚꢖ

ꢇ

ꢈꢇIꢀ ꢙꢎꢌ

I

ꢛ ꢏꢠꢁ

ꢝꢊꢚ

ꢘ

ꢙ

ꢚ ꢐꢏꢘ

ꢚ

R

ꢛ ꢕꢔꢜꢋ

ꢛ ꢏꢒꢒ

ꢝꢊꢚ

ꢁ

Iꢂ

ꢓꢒ

ꢕꢔ

ꢕꢒ

ꢏꢔ

ꢏꢒ

ꢔ

ꢛ ꢑꢞꢙꢙꢐ

ꢘ

ꢙ

ꢚ ꢐꢑꢑꢘ

ꢘ

ꢚ ꢋꢘ

ꢚ ꢌꢘ

I

ꢛ ꢕꢒꢒꢟꢁ

ꢙ

ꢝꢊꢚ

ꢙ

ꢖ ꢈRꢇꢗꢉ

ꢌꢍꢎ

ꢘ ꢈRꢇꢗꢉ

ꢇ ꢈRꢇꢗꢉ

ꢒ

ꢘ

ꢙ

ꢚ ꢍꢘ

ꢖꢔ

ꢖꢏꢒ

ꢌꢍꢌꢎ

ꢒꢍꢑ ꢒꢏꢑ

ꢑ

ꢏꢑ ꢍꢑ ꢋꢑ ꢓꢑ ꢐꢑꢑ ꢐꢏꢑ

ꢀꢁꢂꢃꢁRꢄꢀꢅRꢁ ꢆꢇꢈꢉ

ꢋꢐꢑꢐ ꢔꢏꢐ

ꢏꢐ

ꢏꢒꢐ

ꢏꢒꢒꢐ

ꢏꢗ

ꢌ

ꢌꢍꢌꢓ ꢌꢍꢎ ꢌꢍꢎꢓ ꢌꢍꢐ ꢌꢍꢐꢓ ꢌꢍꢑ ꢌꢍꢑꢓ ꢌꢍꢒ ꢌꢍꢒꢓ ꢌꢍꢓ

ꢇRꢈꢉꢊꢈꢂꢋꢌ ꢃꢍꢎꢆ

Iꢀꢁꢂꢃ ꢄꢅꢆꢃꢇꢈꢉ ꢊꢄꢋ

ꢘꢏꢒꢏ ꢀꢒꢙ

ꢔꢎꢌꢎ ꢈꢌꢕ

Input Bias Current

vs Temperature

LTC6101: Supply Current

vs Supply Voltage

LTC6101HV: Supply Current

vs Supply Voltage

ꢑꢒꢍ

ꢑꢍꢍ

ꢓꢒꢍ

ꢓꢍꢍ

ꢔꢒꢍ

ꢔꢍꢍ

ꢕꢒꢍ

ꢕꢍꢍ

ꢒꢍ

ꢑꢍꢍ

ꢒꢍꢍ

ꢓꢍꢍ

ꢔꢍꢍ

ꢕꢍꢍ

ꢖꢍꢍ

ꢍ

ꢊꢋꢌ

ꢊꢍꢌ

ꢊꢎꢌ

ꢊꢌꢌ

ꢏꢌ

ꢚꢍꢙꢎ

ꢗꢒꢙꢎ

ꢕꢔꢒꢙꢎ

ꢙꢍꢛꢎ

ꢗꢒꢛꢎ

ꢔ

ꢕ

ꢖ ꢋꢔ ꢀꢗ ꢊꢌꢌꢔ

ꢖꢕꢒꢛꢎ

ꢔ

ꢕ

ꢖ ꢍꢔ

ꢔꢒꢙꢎ

ꢍꢙꢎ

ꢕꢒꢛꢎ

ꢋꢌ

ꢚꢓꢍꢛꢎ

ꢍꢛꢎ

ꢘꢑꢍꢙꢎ

ꢍꢌ

ꢅ

ꢛ ꢍ

ꢅ

R

ꢜ ꢍ

Iꢏ

ꢎꢌ

R

ꢛ ꢕꢜ

ꢜ ꢖꢝ

ꢌ

ꢍ

ꢐꢍꢌ ꢐꢎꢌ

ꢌ

ꢎꢌ ꢍꢌ ꢋꢌ ꢏꢌ ꢊꢌꢌ ꢊꢎꢌ

ꢀꢁꢂꢃꢁRꢄꢀꢅRꢁ ꢆꢇꢈꢉ

ꢍ

ꢑ

ꢗ ꢕꢔ ꢕꢖ ꢔꢍ ꢔꢑ ꢔꢗ ꢓꢔ ꢓꢖ ꢑꢍ ꢑꢑ ꢑꢗ ꢒꢔ ꢒꢖ ꢖꢍ

ꢍ

ꢖꢍ ꢕꢍ ꢔꢍ ꢓꢍ ꢒꢍ ꢑꢍ ꢙꢍ ꢗꢍ ꢘꢍ ꢖꢍꢍ

ꢀꢁꢂꢂꢃꢄ ꢅꢆꢃꢇꢈꢉꢊ ꢋꢅꢌ

ꢋꢊꢌꢊ ꢑꢊꢌ

ꢖꢕꢍꢕ ꢉꢕꢕ

ꢑꢖꢍꢖ ꢉꢕꢕ

Step Response 0mV to 10mV

Step Response 10mV to 20mV

ꢝ

ꢙ

ꢀ

ꢀ^ꢁꢂꢃꢄꢅꢀ

ꢀ^ꢁꢂꢆꢄꢅꢀ

ꢜꢊꢘꢜꢊ

ꢀ

ꢗꢋꢘꢗꢋ

ꢀ^ꢁ

ꢀ^ꢁꢂꢃꢄꢅꢀ

ꢄꢆꢇꢀ

ꢃꢀ

ꢉ

ꢛ ꢆꢈꢜꢝ

ꢚ

ꢈ

ꢕ ꢓꢇꢖꢗ

ꢀ^ꢁꢛ ꢃꢆꢀ

ꢔ

ꢀ^ꢁꢕ ꢃꢓꢀ

R

ꢀ

ꢛ ꢃꢄꢄ

Iꢘ

R

ꢀ

ꢕ ꢃꢄꢄ

Iꢘ

ꢛ ꢈꢞ

ꢕꢖꢉ

ꢕ ꢇꢛ

^ꢁꢛ ꢀ^ꢁ

ꢙꢚꢈ

^ꢁꢕ ꢀ^ꢁ

ꢗꢋꢘꢗꢋ

ꢜꢊꢘꢜꢊ

ꢄꢀ

ꢄꢇꢈꢀ

ꢀ

ꢙꢚꢈ

ꢀ

ꢕꢖꢉ

ꢈIꢉꢊ ꢋꢃꢄꢌꢍꢎꢏIꢀꢐ

ꢉIꢊꢋ ꢌꢃꢄꢍꢎꢏꢐIꢀꢑ

ꢑꢃꢄꢃ ꢒꢃꢓ

ꢒꢃꢄꢃ ꢓꢃꢔ

Rev I

7

For more information www.analog.com

LTC6101/LTC6101HV

TYPICAL PERFORMANCE CHARACTERISTICS

Step Response Rising Edge

Step Response 100mV

ꢖ

–

ꢝ

ꢀ

V

ꢀ

ꢔꢉꢕꢔꢉ

SENSE

ꢛꢉꢜꢛꢉ

ꢀ^ꢁ

ΔV

SENSE

^–=100mV

ꢀ^ꢁꢂꢃꢄꢄꢅꢀ

ꢇ ꢘ ꢙꢆꢚꢛ

ꢗ

ꢀ^ꢁꢂꢃꢄꢄꢅꢀ

ꢀ^ꢁꢘ ꢃꢙꢀ

ꢘ ꢙꢙꢄꢄꢝꢞ

ꢕ

ꢘ ꢃꢄꢙꢚ

ꢖꢓꢗꢎ

ꢛ

ꢆꢀ

5.5V

5V

ꢆꢀ

ꢜꢒꢗꢎ

ꢇ

ꢘ ꢞꢆꢟꢕ

ꢗ

R

ꢀ

ꢘ ꢃꢄꢄ

Iꢕ

ꢀ^ꢁꢘ ꢃꢞꢀ

ꢘ ꢆꢟ

ꢒꢓꢇ

ꢔꢉꢕꢔꢉ

R

ꢀ

ꢘ ꢃꢄꢄ

ꢘ ꢆꢠ

^ꢁꢘ ꢀ^ꢁ

T

= 25ꢅC

Iꢜ

ꢓꢔꢇ

A

V⁺= 12V

^ꢁꢘ ꢀ^ꢁ

ꢕ

ꢘ ꢃꢄꢄꢄꢙꢚ

R

V

= 100

= 5k

SENSE

ꢖꢓꢗꢎ

ꢛꢉꢜꢛꢉ

IN

OUT

V

OUT

⁺= V⁺

I

= 100ꢄA

OUT

ꢄꢀ

0.5V

0V

I

= 0

ꢄꢀ

ꢀ

OUT

ꢀ

ꢓꢔꢇ

ꢒꢓꢇ

ꢇIꢈꢉ ꢊꢃꢄꢄꢋꢌꢍꢎIꢀꢏ

ꢇIꢈꢉ ꢊꢃꢄꢋꢌꢍꢎIꢀꢏ

TIME (500ns/DIV)

ꢐꢃꢄꢃ ꢑꢃꢆ

ꢐꢃꢄꢃ ꢑꢃꢒ

ꢀꢁꢂꢁ ꢃꢁꢀ

Step Response Falling Edge

PSRR vs Frequency

ꢑꢔꢏ

ꢤꢜꢅꢔꢑꢏꢑꢥ

ꢦ

Δꢂ

^ꢕꢖꢎꢃꢃꢗꢂ

ꢑꢗꢏ

ꢑꢘꢏ

ꢑꢏꢏ

ꢙꢏ

ꢓꢆꢔꢓꢆ

ꢢ

ꢚ ꢗꢢ

ꢂ

ꢑꢒꢄ

ꢀꢁꢀꢂ

ꢀꢂ

ꢄ

ꢖ ꢚꢀꢛꢜ

ꢙ

ꢤꢜꢅꢔꢑꢏꢑꢥ

ꢂ^ꢝꢖ ꢎꢚꢂ

ꢤꢜꢅꢔꢑꢏꢑꢈ ꢥ

R

ꢂ

ꢖ ꢎꢃꢃ

ꢦ

Iꢔ

ꢢ

ꢚ ꢑꢘꢢ

ꢖ ꢀꢞ

ꢑꢒꢄ

^ꢝꢖ ꢂ^ꢝ

ꢓꢆꢔꢓꢆ

ꢔꢏ

R

ꢅ

ꢚ ꢑꢏꢏ

Iꢄ

ꢚ ꢑꢏꢒ

ꢚ ꢝꢞꢀ

ꢛꢃꢜ

ꢕꢟIꢄ ꢚ ꢑꢏꢏ

ꢗꢏ

I

ꢖ ꢎꢃꢃꢘ

ꢑꢒꢄ

ꢤꢜꢅꢔꢑꢏꢑꢈ ꢥ

ꢦ

ꢘꢏ

I

ꢚ ꢑꢏꢏꢡꢟ

ꢚ ꢝꢏꢣꢢꢞ

ꢢ ꢚ ꢝꢢ

ꢛꢃꢜꢠꢅ

ꢃꢁꢀꢂ

ꢃꢂ

I

ꢖ ꢃ

ꢑꢒꢄ

ꢢ

Iꢄꢟꢅ

ꢏ

ꢏꢐꢑ

ꢑ

ꢑꢏ ꢑꢏꢏ ꢑꢒ

ꢑꢏꢒ ꢑꢏꢏꢒ ꢑꢓ

ꢄIꢅꢆ ꢇꢀꢃꢃꢈꢉꢊꢋIꢂꢌ

ꢀRꢁꢂꢃꢁꢄꢅꢆ ꢇꢈꢉꢊ

ꢔꢑꢏꢑ ꢕꢑꢖ

ꢍꢎꢃꢎ ꢏꢎꢐ

Rev I

8

For more information www.analog.com

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

ꢋꢅꢏꢊ

ꢂ

ꢀ ^{ꢒꢐꢓꢒꢐ}

ꢒꢐꢓꢒꢐ

ꢁ

ꢂ

ꢉꢏꢇꢇꢐRꢑ

ꢁ

ꢂ

R

Iꢓ

ꢃꢄꢂ

ꢋ

ꢅ

ꢏ

ꢊ

ꢀIꢓ

ꢁIꢓ

ꢖꢗ

ꢀ

ꢁ

I

ꢃꢄꢂ

ꢅꢆꢇ

R

ꢅꢆꢇ

ꢂ

ꢔ ꢂ

ꢕ

ꢒꢐꢓꢒꢐ

ꢅꢆꢇ

ꢀ

Iꢓ

ꢂ

ꢋꢇꢌꢈꢃꢄꢃꢍꢋꢇꢌꢈꢃꢄꢃꢎꢂ

R

ꢅꢆꢇ

ꢈꢃꢄꢃ ꢉꢊ

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

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

An internal sense ampliﬁer loop forces IN to have the

+

same potential as IN . Connecting an external resis-

Rev I

9

For more information www.analog.com

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

V

at V

= 5V

I

at V

= 5V

IN

OUT

SENSE

OUT

499

200

100

10k

250mV

100mV

50mV

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

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

ꢌ

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

ꢈ

R

Iꢋ

R

ꢏꢐꢋꢏꢐ

ꢌIꢋ

ꢑIꢋ

ꢑ

ꢌ

sense resistor of 7.5mΩ will set V

to 150µV. This is

SENSE

ꢀꢆꢍꢎ

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.

ꢑ

ꢌ

ꢈ

Choosinga50mΩR

willmaximizethedynamicrange

SENSE

ꢆꢇꢁ

ꢈ

ꢀꢁꢂꢃꢄꢅꢄ

ꢆꢇꢁ

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

ꢆꢇꢁ

ꢃꢄꢅꢄ ꢉꢅꢊ

Figure 2. Kelvin Input Connection Preserves

Accuracy Despite Large Load Current

Rev I

10

For more information www.analog.com

LTC6101/LTC6101HV

APPLICATIONS INFORMATION

ꢁ

Selection of External Input Resistor, R

ꢀ

IN

The external input resistor, R , controls the transconduc-

IN

tanceofthecurrentsensecircuit. SinceI =V

/R ,

R

ꢆꢇꢈꢆꢇ

ꢅ

ꢆꢇꢈꢆꢇ

OUT

SENSE IN

IN

transconductance g = 1/R . For example, if R = 100,

ꢉꢊꢋꢊ ꢌꢋꢍꢎ

m

IN

then I = V

/100 or I = 1mA for V = 100mV.

OUT

SENSE

OUT

SENSE

ꢂꢃꢄꢅ

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

RANGE

V

IN

619k

INDICATOR

(I

> 1.2A)

LOAD

OUT

HIGH CURRENT RANGE OUT

250mV/A

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

Rev I

11

For more information www.analog.com

LTC6101/LTC6101HV

APPLICATIONS INFORMATION

Selection of External Output Resistor, R

Output Error, E , Due to the Ampliﬁer DC Offset

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

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

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,

SENSE IN

B

BIAS

E

≈ –R

• I

mightdo,thenalowerR

valuemayberequiredinorder

OUT(IBIAS)

OUT BIAS

OUT

to preserve the accuracy of the output. As an example, if

For instance if I

error is 0.1mV.

is 100nA and R

is 1kΩ, the output

OUT

BIAS

theinputimpedanceofthedrivencircuitis100timesR

,

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

a voltage offset in R

I (–) and E

IN

that cancels the error due to

R

•R

SENSE

IN(DRIVEN)

OUT

V

=I

•

≈ 0. In applications where R <

OUT OUT

B

OUT(IBIAS)

SENSE

R

+R

OUT

R , the bias current error can be similarly reduced if an

100

external resistor R (+) = (R – R ) is connected as

IN

SENSE

=I

•R

•

= 0.99 •I

•R

OUT

OUT OUT

shown in Figure 4 below. Under both conditions:

101

E

=

R

• I ; I = I (+) – I (–)

OUT(IBIAS)

OUT OS OS B B

Error Sources

ꢍ

ꢈ

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.

ꢌ

R

Iꢋ

R

ꢐꢑꢋꢐꢑ

ꢍ

Iꢋ

ꢍIꢋ

ꢌIꢋ

Ideally, the circuit output is:

ꢌ

ꢍ

ꢀꢆꢎꢏ

R

ꢌ

ꢍ

OUT

ꢈ

V

= V

•

;V

=R •I

SENSE SENSE

OUT

SENSE

R

IN

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:

ꢆꢇꢁ

ꢈ

ꢀꢁꢂꢃꢄꢅꢄ

ꢆꢇꢁ

R

ꢆꢇꢁ

ꢃꢄꢅꢄ ꢉꢅꢊ

ꢍ

ꢌ

R

ꢒ

R

ꢌ R

Iꢋ ꢐꢑꢋꢐꢑ

Iꢋ

Figure 4. Second Input R Minimizes

Error Due to Input Bias Current

Rev I

12

For more information www.analog.com

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

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

= 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

= θ • P

JA TOTAL(MAX)

RISE

MAX

the error due to offset current, I is 3k x 2nA = 6µVolts

OS

= T

+ T

RISE

AMBIENT

+

–

(typical), provided R = R

.

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

Rev I

13

For more information www.analog.com

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

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).

ꢈ

ꢑꢌꢁꢁꢐRꢒ

1

f

=

–3dB

R

2 • π •R

•C

OUT

Iꢋ

OUT

R

ꢏꢐꢋꢏꢐ

ꢎIꢋ

ꢓIꢋ

ꢓ

ꢎ

Useful Equations

Input Voltage: V

ꢈ

ꢀꢆꢌꢍ

ꢓ

ꢎ

ꢈ

=I

•R

SENSE

SENSE SENSE

V

R

OUT

R

IN

OUT

Voltage Gain:

Current Gain:

=

V

SENSE

ꢆꢇꢁ

ꢈ

ꢀꢁꢂꢃꢄꢅꢄ

ꢆꢇꢁ

I

R

SENSE

R

OUT

ꢆꢇꢁ

=

I

R

ꢃꢄꢅꢄ ꢉꢅꢊ

IN

SENSE

I

1

OUT

Figure 5. V⁺Powered Separately from

Load Supply (V_BATT

Transconductance:

=

V

R

IN

SENSE

)

V

R

OUT

Transimpedance:

I

=R

•

SENSE

R

IN

SENSE

ꢍ

ꢈ

R

Iꢊ

R

ꢎꢏꢊꢎꢏ

ꢍIꢊ

ꢐIꢊ

ꢐ

ꢍ

ꢐ

ꢍ

ꢀꢆꢋꢌ

ꢈ

ꢆꢇꢁ

ꢈ

ꢆꢇꢁ

ꢀꢁꢂꢃꢄꢅꢄ

R

ꢆꢇꢁ

ꢃꢄꢅꢄ ꢉꢅꢃ

Figure 6. LTC6101 Supply Current

Monitored with Load

Rev I

14

For more information www.analog.com

LTC6101/LTC6101HV

APPLICATIONS INFORMATION

Reverse Supply Protection

sheet. Note that the curves are labeled with respect to the

initial output currents.

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

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 cur-

–

rent ﬂowing through R and the internal FET. This current

be added in series with V (Figure 7). This will limit the

IN

slew rate will be determined by the ampliﬁer and FET

reverse current through the LTC6101. Note that this diode

will limit the low voltage performance of the LTC6101 by

effectively reducing the supply voltage to the part by V .

characteristics as well as the input resistor, R . Using a

IN

smaller R will allow the output current to increase more

IN

D

quickly, decreasing the response time at the output. This

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).

will also have the effect of increasing the maximum output

current. Using a larger R

will decrease the response

OUT

time, since V

= I

• R . Reducing R and increas-

OUT OUT OUT IN

ing R

will both have the effect of increasing the voltage

OUT

gain of the circuit.

Response Time

High Voltage Spacing

The LTC6101 isdesignedto exhibitfastresponseto inputs

forthepurposeofcircuitprotectionorsignaltransmission.

This response time will be affected by the external circuit

in two ways, delay and speed.

For applications with higher voltage, the TSOT-23 HV

pinout of the LTC6101HV eases the printed circuit board

(PCB) layout burden. In the typical high side current

sense conﬁguration, the sense voltages will be at or very

near the supply; normally the sense difference voltage is

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

+

small. Therefore V , +IN and –IN will be roughly the same

voltage. The TSOT-23 HV pinout provides connection for

these three pins on the left side (Top View). Because volt-

age differences between these high side pins and the OUT

R

or decreasing R . The effect of increased output

SENSE

IN

–

and V pin may be high, the OUT and V pin lie separately,

on the right side of the package.

current is illustrated in the step response curves in the

Typical Performance Characteristics section of this data

R

ꢒꢓꢔꢒꢓ

ꢑꢒꢓꢑꢒ

Rꢁ

ꢁꢂꢂ

Rꢁ

ꢁꢂꢂ

ꢏ

ꢐꢅꢉꢉ

ꢖIꢓ

ꢕIꢓ

ꢗIꢔ

ꢖIꢔ

ꢕ

ꢖ

ꢗ

ꢅ

ꢔ

ꢐ

ꢍ

ꢕ

ꢎ

ꢗ

ꢖ

ꢈ

ꢕ

ꢅ

ꢆ

ꢏ

ꢎ

ꢏꢐꢆꢆ

Rꢑ

ꢁꢎ

ꢕꢘꢉ

ꢔꢗꢆ

ꢈꢉꢇꢀꢁꢂꢁ

ꢆꢁ

ꢅꢆꢇ

ꢅꢆꢇꢀꢁꢂꢁ

Rꢊ

ꢋꢌꢍꢍꢎ

ꢍꢁ

Rꢈ

ꢉꢊꢋꢋꢌ

ꢀꢁꢂꢁ ꢃꢂꢄ

Figure 8. Additional Resistor R3 Protects Output During

Supply Reversal

Figure 7. Schottky Prevents Damage During Supply Reversal

Rev I

15

For more information www.analog.com

LTC6101/LTC6101HV

TYPICAL APPLICATIONS

Bidirectional Current Sense Circuit with Separate Charge/Discharge Output

I

CHARGE

DISCHARGE

R

SENSE

CHARGER

R

IN C

R

IN D

100

R

IN C

100

IN D

100

+IN

–IN

+IN

V

BATT

–

+

–

+

–

V

L

O

A

D

OUT

LTC6101

+

OUT D

–

+

R

OUT C

4.99k

OUT D

4.99k

V

OUT C

–

6101 TA02

R

OUT D

DISCHARGING: V

CHARGING: V

= I

• R

WHEN I

≥ 0

OUT D DISCHARGE

SENSE

DISCHARGE

(

)

IN D

R

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

ꢀꢁꢂꢃ

R

ꢓꢔꢕꢓꢔ

CMPZ4697*

(10V)

LASER MONITOR

PHOTODIODE

i

PD

I

Rꢇ

ꢇꢈꢈ

ꢓꢑꢚꢚꢀꢛ

ꢅIꢕ

ꢄIꢕ

4.75k

10k

+IN

–IN

ꢀ

ꢁ

ꢂ

ꢃ

ꢄ

ꢅ

ꢄ

ꢐ

–

+

–

V

ꢐ

ꢒꢂꢉꢉ

ꢁꢑꢉ

ꢀꢉꢖꢆꢇꢈꢇ

ꢅ

ꢄ

OUT

Rꢋ

ꢌꢍꢎꢎꢏ

ꢐ

LTC6101

ꢁꢑꢉ

V

O

R

L

ꢆꢇꢈꢇ ꢉꢂꢈꢊ

V

= I • R

L

6101 TA04

O

PD

ꢐ

ꢁꢑꢉ

ꢗ ꢌꢎꢍꢎ ꢘ R

ꢙ

I

ꢅ I

ꢜ

*V SETS PHOTODIODE BIAS

ꢓꢔꢕꢓꢔ ꢀꢁꢂꢃ ꢓꢑꢚꢚꢀꢛ

Z

V

+ 4 ≤ V ≤ V + 60

S Z

Z

Rev I

16

For more information www.analog.com

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

1µF

5V

2

1

+

V

REF

OUT

V

CC

OUT

4

5

9

8

7

+

LTC6101

IN

SCK

SDD

LTC2433-1

TO µP

R

OUT

–

IN

C

4.99k

–

F

REF GND

O

3

6

10

R

OUT

6101 TA06

V

=

• V

SENSE

= 49.9V

SENSE

ADC FULL-SCALE = 2.5V

OUT

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

Rev I

17

For more information www.analog.com

LTC6101/LTC6101HV

TYPICAL APPLICATIONS

48V Supply Current Monitor with Isolated Output with 105V Survivability

I

ꢉ

ꢌꢍꢊꢌꢍ

ꢐ

ꢋ

ꢉ

ꢆꢎꢄꢏ

ꢌ

R

ꢌꢍꢊꢌꢍ

R

Iꢊ

ꢋIꢊ

ꢐIꢊ

ꢐ

ꢋ

ꢐ

ꢉ

ꢋ

ꢉ

ꢆꢃꢇꢀꢁꢂꢁꢈꢉ

ꢆꢎꢓIꢇ

ꢎꢑꢃ

ꢉ

R

ꢎꢑꢃ

ꢉ

ꢎꢑꢃ

ꢄꢊꢖ ꢎꢕꢃꢎIꢌꢎꢆꢄꢃꢎR

ꢋ

ꢉ

ꢊ ꢒ ꢎꢕꢃꢎIꢌꢎꢆꢄꢃꢎR ꢇꢑRRꢍꢊꢃ ꢓꢄIꢊ

R

ꢌꢍꢊꢌꢍ

ꢉ

ꢎꢑꢃ

ꢒ ꢉ

I

ꢔ

ꢔ ꢊ ꢔ R

ꢎꢑꢃ

ꢆꢎꢓIꢇ ꢋ ꢌꢍꢊꢌꢍ

ꢀꢁꢂꢁ ꢃꢄꢂꢅ

R

Iꢊ

Simple 500V Current Monitor

DANGER! Lethal Potentials Present — Use Caution

I

V

SENSE

500V

SENSE

–

+

R

SENSE

R

IN

100Ω

+IN

–IN

L

O

A

D

–

+

DANGER!!

HIGH VOLTAGE!!

+

–

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

Rev I

18

For more information www.analog.com

LTC6101/LTC6101HV

PACKAGE DESCRIPTION

Please refer to http://www.linear.com/product/LTC6101#packaging for the most recent package drawings.

MS8 Package

8-Lead Plastic MSOP

ꢄReꢪeꢫeꢬꢭe ꢔꢒꢘ ꢖꢚꢍ ꢮ ꢇꢏꢯꢇꢅꢯꢉꢐꢐꢇ Rev ꢍꢆ

ꢇꢎꢅꢅꢦ ꢇꢎꢉꢈꢤ

ꢄꢎꢇꢊꢏ ꢎꢇꢇꢏꢆ

ꢏꢎꢉꢇ

ꢊꢎꢈꢇ ꢥ ꢊꢎꢢꢏ

ꢄꢎꢈꢇꢉꢆ

ꢄꢎꢉꢈꢐ ꢥ ꢎꢉꢊꢐꢆ

ꢀIꢓ

ꢊꢎꢇꢇ ꢇꢎꢉꢇꢈ

ꢄꢎꢉꢉꢅ ꢎꢇꢇꢢꢆ

ꢄꢓꢂꢒꢋ ꢊꢆ

ꢇꢎꢏꢈ

ꢄꢎꢇꢈꢇꢏꢆ

Rꢋꢜ

ꢇꢎꢐꢏ

ꢄꢎꢇꢈꢏꢐꢆ

ꢞꢁꢘ

ꢇꢎꢢꢈ ꢇꢎꢇꢊꢅ

ꢄꢎꢇꢉꢐꢏ ꢎꢇꢇꢉꢏꢆ

ꢒꢣꢃ

ꢅ

ꢤ ꢐ ꢏ

Rꢋꢘꢂꢀꢀꢋꢓꢖꢋꢖ ꢁꢂꢔꢖꢋR ꢃꢑꢖ ꢔꢑꢣꢂꢛꢒ

ꢊꢎꢇꢇ ꢇꢎꢉꢇꢈ

ꢄꢎꢉꢉꢅ ꢎꢇꢇꢢꢆ

ꢄꢓꢂꢒꢋ ꢢꢆ

ꢢꢎꢦꢇ ꢇꢎꢉꢏꢈ

ꢄꢎꢉꢦꢊ ꢎꢇꢇꢐꢆ

ꢖꢋꢒꢑIꢔ ꢨꢑꢩ

ꢇꢎꢈꢏꢢ

ꢄꢎꢇꢉꢇꢆ

ꢇꢧ ꢥ ꢐꢧ ꢒꢣꢃ

ꢍꢑꢛꢍꢋ ꢃꢔꢑꢓꢋ

ꢉ

ꢈ

ꢊ

ꢢ

ꢇꢎꢏꢊ ꢇꢎꢉꢏꢈ

ꢄꢎꢇꢈꢉ ꢎꢇꢇꢐꢆ

ꢉꢎꢉꢇ

ꢄꢎꢇꢢꢊꢆ

ꢀꢑꢟ

ꢇꢎꢅꢐ

ꢄꢎꢇꢊꢢꢆ

Rꢋꢜ

ꢖꢋꢒꢑIꢔ ꢨꢑꢩ

ꢇꢎꢉꢅ

ꢄꢎꢇꢇꢤꢆ

ꢁꢋꢑꢒIꢓꢍ

ꢃꢔꢑꢓꢋ

ꢇꢎꢈꢈ ꢥ ꢇꢎꢊꢅ

ꢇꢎꢉꢇꢉꢐ ꢇꢎꢇꢏꢇꢅ

ꢄꢎꢇꢇꢦ ꢥ ꢎꢇꢉꢏꢆ

ꢄꢎꢇꢇꢢ ꢎꢇꢇꢈꢆ

ꢇꢎꢐꢏ

ꢄꢎꢇꢈꢏꢐꢆ

ꢞꢁꢘ

ꢒꢣꢃ

ꢀꢁꢂꢃ ꢄꢀꢁꢅꢆ ꢇꢈꢉꢊ Rꢋꢌ ꢍ

ꢓꢂꢒꢋꢕ

ꢉꢎ ꢖIꢀꢋꢓꢁIꢂꢓꢁ Iꢓ ꢀIꢔꢔIꢀꢋꢒꢋRꢗꢄIꢓꢘꢙꢆ

ꢈꢎ ꢖRꢑꢚIꢓꢍ ꢓꢂꢒ ꢒꢂ ꢁꢘꢑꢔꢋ

ꢊꢎ ꢖIꢀꢋꢓꢁIꢂꢓ ꢖꢂꢋꢁ ꢓꢂꢒ Iꢓꢘꢔꢛꢖꢋ ꢀꢂꢔꢖ ꢜꢔꢑꢁꢙꢝ ꢃRꢂꢒRꢛꢁIꢂꢓꢁ ꢂR ꢍꢑꢒꢋ ꢞꢛRRꢁꢎ

ꢀꢂꢔꢖ ꢜꢔꢑꢁꢙꢝ ꢃRꢂꢒRꢛꢁIꢂꢓꢁ ꢂR ꢍꢑꢒꢋ ꢞꢛRRꢁ ꢁꢙꢑꢔꢔ ꢓꢂꢒ ꢋꢟꢘꢋꢋꢖ ꢇꢎꢉꢏꢈꢠꢠ ꢄꢎꢇꢇꢐꢡꢆ ꢃꢋR ꢁIꢖꢋ

ꢢꢎ ꢖIꢀꢋꢓꢁIꢂꢓ ꢖꢂꢋꢁ ꢓꢂꢒ Iꢓꢘꢔꢛꢖꢋ IꢓꢒꢋRꢔꢋꢑꢖ ꢜꢔꢑꢁꢙ ꢂR ꢃRꢂꢒRꢛꢁIꢂꢓꢁꢎ

IꢓꢒꢋRꢔꢋꢑꢖ ꢜꢔꢑꢁꢙ ꢂR ꢃRꢂꢒRꢛꢁIꢂꢓꢁ ꢁꢙꢑꢔꢔ ꢓꢂꢒ ꢋꢟꢘꢋꢋꢖ ꢇꢎꢉꢏꢈꢠꢠ ꢄꢎꢇꢇꢐꢡꢆ ꢃꢋR ꢁIꢖꢋ

ꢏꢎ ꢔꢋꢑꢖ ꢘꢂꢃꢔꢑꢓꢑRIꢒꢣ ꢄꢞꢂꢒꢒꢂꢀ ꢂꢜ ꢔꢋꢑꢖꢁ ꢑꢜꢒꢋR ꢜꢂRꢀIꢓꢍꢆ ꢁꢙꢑꢔꢔ ꢞꢋ ꢇꢎꢉꢇꢈꢠꢠ ꢄꢎꢇꢇꢢꢡꢆ ꢀꢑꢟ

Rev I

19

For more information www.analog.com

LTC6101/LTC6101HV

PACKAGE DESCRIPTION

Please refer to http://www.linear.com/product/LTC6101#packaging for the most recent package drawings.

S5 Package

5-Lead Plastic TSOT-23

ꢆReꢩeꢪeꢫꢬe ꢕꢉꢑ ꢖꢢꢣ ꢭ ꢃꢂꢝꢃꢎꢝꢀꢦꢒꢂ Rev ꢏꢌ

ꢃꢁꢦꢍ

ꢙꢗꢟ

ꢃꢁꢜꢂ

Rꢊꢠ

ꢍꢁꢜꢃ ꢏꢐꢑ

ꢆꢇꢈꢉꢊ ꢋꢌ

ꢀꢁꢍꢍ Rꢊꢠ

ꢀꢁꢋ ꢙIꢇ

ꢀꢁꢂꢃ ꢄ ꢀꢁꢅꢂ

ꢆꢇꢈꢉꢊ ꢋꢌ

ꢍꢁꢎꢃ ꢏꢐꢑ

ꢒꢁꢎꢂ ꢙꢗꢟ ꢍꢁꢦꢍ Rꢊꢠ

ꢔIꢇ ꢈꢇꢊ

Rꢊꢑꢈꢙꢙꢊꢇꢖꢊꢖ ꢐꢈꢕꢖꢊR ꢔꢗꢖ ꢕꢗꢓꢈꢘꢉ

ꢔꢊR Iꢔꢑ ꢑꢗꢕꢑꢘꢕꢗꢉꢈR

ꢃꢁꢒꢃ ꢄ ꢃꢁꢋꢂ ꢉꢓꢔ

ꢂ ꢔꢕꢑꢐ ꢆꢇꢈꢉꢊ ꢒꢌ

ꢃꢁꢜꢂ ꢏꢐꢑ

ꢃꢁꢎꢃ ꢄ ꢃꢁꢜꢃ

ꢃꢁꢍꢃ ꢏꢐꢑ

ꢖꢗꢉꢘꢙ ꢚꢗꢛ

ꢃꢁꢃꢀ ꢄ ꢃꢁꢀꢃ

ꢀꢁꢃꢃ ꢙꢗꢟ

ꢃꢁꢒꢃ ꢄ ꢃꢁꢂꢃ Rꢊꢠ

ꢀꢁꢜꢃ ꢏꢐꢑ

ꢃꢁꢃꢜ ꢄ ꢃꢁꢍꢃ

ꢆꢇꢈꢉꢊ ꢒꢌ

ꢇꢈꢉꢊꢡ

ꢐꢂ ꢉꢐꢈꢉꢝꢍꢒ ꢃꢒꢃꢍ Rꢊꢞ ꢏ

ꢀꢁ ꢖIꢙꢊꢇꢐIꢈꢇꢐ ꢗRꢊ Iꢇ ꢙIꢕꢕIꢙꢊꢉꢊRꢐ

ꢍꢁ ꢖRꢗꢢIꢇꢣ ꢇꢈꢉ ꢉꢈ ꢐꢑꢗꢕꢊ

ꢒꢁ ꢖIꢙꢊꢇꢐIꢈꢇꢐ ꢗRꢊ IꢇꢑꢕꢘꢐIꢞꢊ ꢈꢠ ꢔꢕꢗꢉIꢇꢣ

ꢋꢁ ꢖIꢙꢊꢇꢐIꢈꢇꢐ ꢗRꢊ ꢊꢟꢑꢕꢘꢐIꢞꢊ ꢈꢠ ꢙꢈꢕꢖ ꢠꢕꢗꢐꢤ ꢗꢇꢖ ꢙꢊꢉꢗꢕ ꢏꢘRR

ꢂꢁ ꢙꢈꢕꢖ ꢠꢕꢗꢐꢤ ꢐꢤꢗꢕꢕ ꢇꢈꢉ ꢊꢟꢑꢊꢊꢖ ꢃꢁꢍꢂꢋꢥꢥ

ꢦꢁ ꢧꢊꢖꢊꢑ ꢔꢗꢑꢨꢗꢣꢊ RꢊꢠꢊRꢊꢇꢑꢊ Iꢐ ꢙꢈꢝꢀꢜꢒ

Rev I

20

For more information www.analog.com

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

DESCRIPTION

PAGE NUMBER

H

1

2

4, 5

6

Changed T value in curve G02 from 45°C to 25°C

A

I

05/18 Adding new TSOT package option

1 to 3, 5 to 9,

13, 15, 18, 21

Rev I

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog

Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Speciﬁcations

subject to change without notice. No license i rant licat r oth selo any patent or patent rights of Analog Devices.

21

s g ed by imp ion o erwi under

For more information www.ana g.com

LTC6101/LTC6101HV

TYPICAL APPLICATION

Bidirectional Current Sense Circuit with Combined Charge/Discharge Output

I

CHARGE

DISCHARGE

R

SENSE

CHARGER

R

IN C

R

IN D

R

IN C

IN D

+IN

–IN

+IN

V

BATT

–

+

–

+

–

V

L

O

A

D

OUT

LTC6101

+

OUT

V

R

OUT

–

6101 TA05

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

V Extends 44V above V , 0.4V/µs Slew Rate, >1MHz

CM

Bandwidth, <250µA Supply Current per Ampliﬁer

LT1637/LT1638/

LT1639

Single/Dual/Quad, Rail-to-Rail, Micropower Op Amp

EE

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

Rev I

D16879-0-5/18(I)

www.analog.com

22

 ANALOG DEVICES, INC. 2005-2018

For more information www.analog.com


型号：	LTC6101CCS5#TRPBF
厂家：	Linear
描述：	LTC6101 - High Voltage, High-Side Current Sense Amplifier in SOT-23; Package: SOT; Pins: 5; Temperature Range: 0°C to 70°C 光电二极管
文件：	总22页 (文件大小：500K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LTC6101CCS5#TRPBF [Linear]

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