LMP8640MK-F/NOPB National Semiconductor, LMP8640MK-F/NOPB Datasheet

LMP8640MK-F/NOPB

Manufacturer Part Number

LMP8640MK-F/NOPB

Description

IC CURRENT SENSE AMP 50V 6-TSOT

Manufacturer

National Semiconductor

Datasheet

1.LMP8640MKE-TNOPB.pdf (16 pages)

Specifications of LMP8640MK-F/NOPB

Amplifier Type

Current Sense

Number Of Circuits

Slew Rate

1.8 V/µs

Gain Bandwidth Product

450kHz

Current - Input Bias

13µA

Voltage - Input Offset

900µV

Current - Supply

2.3mA

Voltage - Supply, Single/dual (±)

2.7 V ~ 12 V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

TSOT-23-6, TSOT-6

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Output Type

Current - Output / Channel

-3db Bandwidth

Other names

LMP8640MK-F/NOPBTR

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LMP8640MK-F/NOPB

Manufacturer:

TI/德州仪器

Quantity:

20 000

Company:

H&T Electronics

Part Number:

LMP8640MK-F/NOPB

Quantity:

11 000

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Precision High Voltage Current Sense Amplifier

General Description

The LMP8640 and the LMP8640HV are precision current

sense amplifiers that detect small differential voltages across

a sense resistor in the presence of high input common mode

voltages with a supply voltage range from 2.7V to 12V.

The LMP8640 accepts input signals with common mode volt-

age range from -2V to 42V, while the LMP8640HV accepts

input signal with common mode voltage range from -2V to

76V. The LMP8640 and LMP8640HV have fixed gain for ap-

plications that demand accuracy over temperature. The

LMP8640 and LMP8640HV come out with three different

fixed gains 20V/V, 50V/V, 100V/V ensuring a gain accuracy

as low as 0.25%. The output is buffered in order to provide

low output impedance. This high side current sense amplifier

is ideal for sensing and monitoring currents in DC or battery

powered systems, excellent AC and DC specifications over

temperature, and keeps errors in the current sense loop to a

minimum. The LMP8640 and LMP8640HV are ideal choice

for industrial, automotive and consumer applications, and it is

available in TSOT-6 package.

Typical Application

LMP™ is a trademark of National Semiconductor Corporation.

300714

LMP8640/LMP8640HV

Features

Typical values, T

■

Applications

■

High common-mode voltage range

— LMP8640

— LMP8640HV

Supply voltage range

Gain options

Max gain error

Low offset voltage

Input bias current

PSRR

CMRR (2.1V to 42V)

Temperature range

6-Pin TSOT Package

High-side current sense

Vehicle current measurement

Motor controls

Battery monitoring

Remote sensing

Power management

= 25°C

30071462

20V/V; 50V/V; 100V/V

September 7, 2010

-40°C to 125°C

www.national.com

2.7V to 12V

-2V to 42V

-2V to 76V

103 dB

900µV

0.25%

13 μA

85 dB

Related parts for LMP8640MK-F/NOPB

LMP8640MK-F/NOPB Summary of contents

Page 1

... The LMP8640 and LMP8640HV are ideal choice for industrial, automotive and consumer applications, and it is available in TSOT-6 package. Typical Application LMP™ trademark of National Semiconductor Corporation. © 2010 National Semiconductor Corporation LMP8640/LMP8640HV Features Typical values, T ■ ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Human Body Model For input pins +IN, -IN For all other pins Machine Model Charge device model Supply Voltage (V ...

Page 3

Symbol Parameter R Differential Mode Input Impedance IN (Note 9) I Supply Current S V Maximum Output Voltage OUT Minimum Output Voltage C Max Output Capacitance Load LOAD (Note 9) 5V Electrical Characteristics Unless otherwise specified, all limits guaranteed for ...

Page 4

Symbol Parameter SR Slew Rate (Note 8, Note 9) R Differential Mode Input Impedance IN (Note 9) I Supply Current S Maximum Output Voltage Minimum Output Voltage V OUT C Max Output Capacitance Load LOAD (Note 9) 12V Electrical Characteristics ...

Page 5

Symbol Parameter BW Fixed Gain LMP8640-T LMP8640HV-T (Note 9) Fixed Gain LMP8640-F LMP8640HV-F (Note 9) Fixed Gain LMP8640-H LMP8640HV-H (Note 9) SR Slew Rate (Note 8, Note 9) R Differential Mode Input Impedance IN (Note 9) I Supply Current S ...

Page 6

Block Diagram Connection Diagram Pin Descriptions Pin Name 1 V OUT + www.national.com 30071430 6-Pin TSOT 30071402 Top View Description Single Ended Output Negative Supply Voltage Positive Input Negative ...

Page 7

... TSOT 20V/V LMP8640HVMK-T LMP8640HVMKE-T LMP8640HVMKX-T LMP8640MK-F LMP8640MKE-F LMP8640MKX-F 6-Pin TSOT 50V/V LMP8640HVMK-F LMP8640HVMKE-F LMP8640HVMKX-F LMP8640MK-H LMP8640MKE-H LMP8640MKX-H 6-Pin TSOT 100V/V LMP8640HVMK-H LMP8640HVMKE-H LMP8640HVMKX-H Package Marking Transport Media 1k Units Tape and Reel AA6A 250 Units Tape and Reel 3k Units Tape and Reel ...

Page 8

Typical Performance Characteristics (-IN MΩ. L Supply Curent vs. Supply Voltage Supply Current vs. V CMRR vs. V (Gain 20V/V) CM www.national.com Unless otherwise specified: T 30071425 CM 30071427 30071422 8 = 25° ...

Page 9

CMRR vs. V (Gain 100V/V) CM 30071424 Output voltage vs. V SENSE 30071416 Large Step response 30071418 Gain vs. Frequency Output voltage vs. V (ZOOM close to 0V) SENSE Small Step response 9 30071414 30071417 30071419 www.national.com ...

Page 10

Settling time (fall) Common mode step response (rise) Load regulation (Sinking) www.national.com Settling time (rise) 30071420 Common mode step response (fall) 30071411 Load regulation (Sourcing) 30071432 10 30071421 30071410 30071431 ...

Page 11

AC PSRR vs. Frequency 30071412 AC CMRR vs. Frequency 11 30071413 www.national.com ...

Page 12

Application Information GENERAL The LMP8640 and LMP8640HV are single supply high side current sense amplifiers with a fixed gain of 20V/V, 50V/V, 100V/V and a common mode voltage range of -2V to 42V or -2V to 76V depending on the ...

Page 13

Sense voltage across the shunt resistor is evaluated according the following formula (MAX Vin ADC) / Gain; SENSE hence the max V will be 205mV, 82mV, 41mV respec- SENSE tively. The shunt resistor are ...

Page 14

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted TSOT-6 NS Package Number MK06A 14 ...

Page 15

Notes 15 www.national.com ...

Page 16

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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