LTC6101BHS5#TRM_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; 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

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

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

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

APPLICATIONS

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.

n

Current Shunt Measurement

n

Battery Monitoring

n

Remote Sensing

n

Power Management

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

ThinSOT is a trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

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

T

= 25°C

⁺= 12V

A

V

1μF

5V

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

OUT

V

OUT

=

• V

= 49.9V

SENSE

IN

6101fg

1

LTC6101/LTC6101HV

ABSOLUTE MAXIMUM RATINGS

(Note 1)

+

–

Total Supply Voltage (V to V )

LTC6101I/LTC6101HVI......................... –40°C to 85°C

LTC6101H/LTC6101HVH ................... –40°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

PACKAGE/ORDER INFORMATION

TOP VIEW

+

TOP VIEW

–IN

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 PART NUMBER

MS8 PART MARKING*

ORDER PART NUMBER

S5 PART MARKING*

LTC6101ACMS8

LTC6101AIMS8

LTC6101AHMS8

LTC6101HVACMS8

LTC6101HVAIMS8

LTC6101HVAHMS8

LTBSB

LTBSX

LTC6101ACS5

LTC6101AIS5

LTBND

LTBSZ

LTC6101AHS5

LTC6101BCS5

LTC6101CCS5

LTC6101BIS5

LTC6101CIS5

LTC6101BHS5

LTC6101CHS5

LTC6101HVACS5

LTC6101HVAIS5

LTC6101HVAHS5

LTC6101HVBCS5

LTC6101HVCCS5

LTC6101HVBIS5

LTC6101HVCIS5

LTC6101HVBHS5

LTC6101HVCHS5

Order Options Tape and Reel: Add #TR

Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marketing: http://www.linear.com/leadfree/

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

*The temperature grades and parametric grades are identiﬁed by a label on the shipping container.

6101fg

2

LTC6101/LTC6101HV

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

operating 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

SENSE

V

SENSE

V

SENSE

= 5mV, Gain = 100, LTC6101A

= 5mV, Gain = 100, LTC6101AC, LTC6101AI

= 5mV, Gain = 100, LTC6101AH

85

300

450

535

μV

OS

●

V

= 5mV, Gain = 100, LTC6101B

150

400

450

810

μV

SENSE

●

V

= 5mV, Gain = 100, LTC6101C

800

1200

μV

SENSE

ΔV /ΔT

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

= 0V, Gain = 100, LTC6101C

150

250

mV

SENSE

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

= 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

r

SENSE

S

V = 4V

S

BW

Signal Bandwidth

I

= 200ꢀA, 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

6101fg

3

LTC6101/LTC6101HV

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

operating 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

SENSE

V

SENSE

V

SENSE

= 5mV, Gain = 100, LTC6101HVA

= 5mV, Gain = 100, LTC6101HVAC, LTC6101HVAI

= 5mV, Gain = 100, LTC6101HVAH

85

300

450

535

μV

OS

●

V

= 5mV, Gain = 100, LTC6101HVB

150

400

450

810

μV

SENSE

●

V

= 5mV, Gain = 100, LTC6101HVC

800

1200

μV

SENSE

ΔV /ΔT

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

= 0V, Gain = 100, LTC6101HVC

150

250

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 25V on a 5V Output Step)

ΔV

V = 5V

S

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

1

1.5

μs

r

SENSE

S

BW

Signal Bandwidth

I

= 200ꢀA, 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

6101fg

4

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

40

20

2.5

2

800

600

REPRESENTATIVE

UNITS

T

A

= 25°C

T

= 0°C

T

A

= –40°C

A

T

= 0°C

A

0

400

T

= 70°C

A

T

= –40°C

= 45°C

–20

–40

–60

–80

–100

–120

–140

200

A

1.5

1

0

= 125°C

A

–200

–400

–600

–800

–1000

T

= 85°C

A

T

= 85°C

A

R

IN

= 100

OUT

= 5mV

IN

0.5

0

R

IN

= 100

OUT

= 5mV

A GRADE

B GRADE

C GRADE

IN

= 5k

R

= 3k

IN

OUT

V

LTC6101

LTC6101HV

= 125°C

V

= 3k

–40 –20

0

20 40 60 80 100 120

TEMPERATURE (°C)

4

11 18 25 32 39 46 53 60

(V)

4 10 20 30 40 50 60 70 80 90 100

(V)

V

SUPPLY

6101 G02

6101 G05

6101 G01

LTC6101: V_OUTMaximum

vs Temperature

LTC6101HV: V_OUTMaximum

vs Temperature

LTC6101: I_OUTMaximum

vs Temperature

12

10

8

12

10

8

7

6

5

4

3

2

1

0

V

S

= 60V

V

S

= 100V

S

V

= 12V

S

V

S

= 12V

V

= 12V

V

= 60V

S

V

= 6V

= 5V

= 4V

S

6

V

= 6V

= 4V

S

V

= 6V

= 4V

S

4

S

2

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

6101fg

5

LTC6101/LTC6101HV

TYPICAL PERFORMANCE CHARATERISTICS

LTC6101HV: I_OUTMaximum

vs Temperature

Output Error Due to Input Offset

vs Input Voltage

Gain vs Frequency

100

10

1

40

35

30

25

20

15

10

5

7

6

5

4

3

2

1

0

T

= 25°C

A

GAIN =10

I

= 1mA

OUT

V

S

= 12V

T

R

= 25°C

= 100

OUT

A

IN

= 4.99k

V

S

= 100V

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

20

R

= 1M

R

= 1M

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)

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

V

= 100

IN

R

V

= 100

IN

= 5k

OUT

= 5k

⁺= V⁺

OUT

⁺= V⁺

SENSE

0V

0.5V

V

OUT

V

OUT

TIME (10μs/DIV)

6101 G12

6101 G13

6101fg

6

LTC6101/LTC6101HV

TYPICAL PERFORMANCE CHARATERISTICS

Step Response Rising Edge

Step Response 100mV

–

V

SENSE

V⁺

ΔV

^–=100mV

SENSE

V⁺-100mV

T = 25°C

A

V⁺-100mV

V⁺= 12V

= 2200pF

C

= 10pF

LOAD

C

5V

5.5V

5V

LOAD

T

= 25°C

A

R

V

= 100

IN

V⁺= 12V

= 5k

OUT

SENSE

R

V

= 100

= 5k

⁺= V⁺

T

= 25°C

IN

OUT

A

V⁺= 12V

⁺= V⁺

C

= 1000pF

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

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

V

= 100

+

IN

V

= 12V

= 5k

OUT

⁺= V⁺

SENSE

60

R

C

= 100

IN

= 10k

= 5pF

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

6101fg

7

LTC6101/LTC6101HV

PIN FUNCTIONS

OUT: Current Output. OUT will source a current that is pro-

portional 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

–

+

I

10V

OUT

R

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

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,

so it will ﬂow through an internal MOSFET to the output

pin.

IN

/R , will

SENSE IN

SENSE

IN

The output current can be transformed into a voltage by

Theory of Operation

–

adding a resistor from OUT to V . The output voltage is

–

An internal sense ampliﬁer loop forces IN to have the

same potential as IN . Connecting an external resis-

–

then V = V + I

• R

.

+

O

OUT

6101fg

8

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

+

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

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

6101fg

9

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

transconductanceg =1/R .Forexample,ifR =100,then

6101 F03a

m

IN

OUT

IN

I

= V

/100 or I

= 1mA for V

= 100mV.

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

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

6101fg

10

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 the

SENSE

outputdoesnotlimittheoutputvoltage,thenR mustbe

OUT

chosen such that the max output voltage does not exceed

the LTC6101 max output voltage rating. If the following

circuit is a buffer or ADC with limited input range, then

Output Error, E , Due to the Bias Currents,

OUT

R

must be chosen so that I

• R

is less than

OUT

OUT(MAX)

OUT

I (+) and I (–)

B

the allowed maximum input range of this circuit.

The bias current I (+) ﬂows into the positive input of the

B

In addition, the output impedance is determined by R

.

OUT

internal op amp. I (–) ﬂows into the negative input.

B

If the circuit to be driven has high enough input imped-

ance, then almost any useful output impedance will be

acceptable. However, if the driven circuit has relatively low

input impedance, or draws spikes of current, such as an

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

E

≈ –R

• I

ADC might do, then a lower R

value may be required

OUT(IBIAS)

OUT BIAS

OUT

in order to preserve the accuracy of the output. As an

example, if the input impedance of the driven circuit is

For instance if I

error is 0.1mV.

is 100nA and R

is 1kΩ, the output

OUT

BIAS

100 times R , then the accuracy of V

will be reduced

OUT

Note that in applications where R

≈ R , I (+) causes

IN B

SENSE

by 1% since:

a voltage offset in R

I (–) and E

that cancels the error due to

SENSE

R_OUT•R_IN(DRIVEN)

≈ 0. In applications where R <

V_OUT=I_OUT•

B

OUT(IBIAS)

SENSE

R

_OUT+R_IN(DRIVEN)

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

IN

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

IN

SENSE

100

101

=I_OUT•R_OUT

•

=0.99 •I_OUT•R_OUT

shown in Figure 4 below. Under both conditions:

E

=

R

• I ; I = I (+) – I (–)

OUT OS OS B B

OUT(IBIAS)

Error Sources

+

V

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.

–

R

IN

R

SENSE

+

IN

+IN

–IN

Ideally, the circuit output is:

–

+

LOAD

–

+

V

R

V_OUT= V_SENSE

•

^OUT;V_SENSE=R_SENSE•I_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:

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

6101fg

11

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

temperatures and high output currents.

Output Current Limitations Due to Power Dissipation

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

6101fg

12

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).

V

BATTERY

1

f_–3dB

=

R

2• π •R_OUT•C_OUT

IN

R

SENSE

+IN

–IN

–

+

Useful Equations

V

LOAD

–

+

V

Input Voltage: V_SENSE=I_SENSE•R_SENSE

V_OUTR_OUT

V_SENSER_IN

Voltage Gain:

Current Gain:

=

OUT

V

LTC6101

OUT

I_OUTR_SENSE

R

OUT

=

I_SENSE

R_IN

6101 F05

I_OUT

1

Figure 5. V⁺Powered Separately from

Load Supply (V_BATT

Transconductance:

=

V_SENSER_IN

V_OUT

)

R_OUT

R_IN

Transimpedance:

=R_SENSE

•

I_SENSE

+

V

R

IN

R

SENSE

+IN

–IN

–

+

–

+

LOAD

V

OUT

V

LTC6101

OUT

R

OUT

6101 F06

Figure 6. LTC6101 Supply Current

Monitored with Load

6101fg

13

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 voltage begins changing. This can be improved

by increasing the minimum output current, either by in-

Some applications may be tested with reverse-polarity

supplies due to an expectation of the type of fault during

operation. The LTC6101 is not protected internally from

external reversal of supply polarity. To prevent damage

that may occur during this condition, a Schottky diode

creasingR

ordecreasingR . Theeffectofincreased

SENSE

IN

output current is illustrated in the step response curves

in the Typical Performance Characteristics section of this

datasheet. Note that the curves are labeled with respect

to the initial output currents.

–

should 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 effectively reducing the supply voltage to the

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

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

more quickly, decreasing the response time at the output.

Response Time

This will also have the effect of increasing the maximum

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.

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

O

A

D

V

BATT

R3

1k

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

6101fg

14

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

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

10k

+IN

–IN

L

O

A

D

–

+

–

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

6101fg

15

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

OUT

REF

V

OUT

4

5

CC

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

= 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

6101fg

16

LTC6101/LTC6101HV

TYPICAL APPLICATIONS

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

I

V

R

SENSE

–

+

V

S

LOAD

SENSE

R

IN

–IN

+IN

+

–

+

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

LOGIC – SENSE

6101 TA08

R

IN

Simple 500V Current Monitor

DANGER! Lethal Potentials Present — Use Caution

I

V

SENSE

500V

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

6101fg

17

LTC6101/LTC6101HV

PACKAGE DESCRIPTION

MS8 Package

8-Lead Plastic MSOP

(Reference LTC DWG # 05-08-1660 Rev F)

0.889 ± 0.127

(.035 ± .005)

5.23

(.206)

MIN

3.20 – 3.45

(.126 – .136)

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

6101fg

18

LTC6101/LTC6101HV

PACKAGE DESCRIPTION

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

1.50 – 1.75

(NOTE 4)

2.80 BSC

1.4 MIN

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

6101fg

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.

19

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 D

IN C

+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

Extends 44V above V , 55μA Supply Current,

LT1636

Rail-to-Rail Input/Output, Micropower Op Amp

V

CM

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

6101fg

LT 0108 REV G • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

20

●

(408) 432-1900 FAX: (408) 434-0507 www.linear.com


型号：	LTC6101BHS5#TRM
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 125°C 光电二极管
文件：	总20页 (文件大小：241K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LTC6101BHS5#TRM [Linear]

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