Integrated Circuits (ICs)

LMP8481MM-S/NOPB

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4 TO 76V, BI-DIRECTIONAL CURRENT SENSE AMPLIFIER

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DocumentsCurrent Mode Control in Switching Power Supplies (Rev. E)Using a PCB Copper Trace as a Current-Sense Shunt Resistor +7

Integrated Circuits (ICs)

LMP8481MM-S/NOPB

Active

Texas Instruments

4 TO 76V, BI-DIRECTIONAL CURRENT SENSE AMPLIFIER

Deep-Dive with AI

DocumentsCurrent Mode Control in Switching Power Supplies (Rev. E)Using a PCB Copper Trace as a Current-Sense Shunt Resistor +7

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LMP8481MM-S/NOPB

-3db Bandwidth	270 kHz
Amplifier Type	Current Sense
Current - Input Bias	6.3 µA
Current - Supply	88 µA
Mounting Type	Surface Mount
Number of Circuits	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 °C
Package / Case	8-MSOP, 8-TSSOP
Package / Case	3 mm
Package / Case [custom]	0.118 in
Slew Rate	1 V/µs
Voltage - Input Offset	80 µV
Voltage - Supply Span (Max) [Max]	76 V
Voltage - Supply Span (Min) [Min]	4.5 V

LMP8481-Q1 Series

AEC-Q100, 4 to 76V, bi-directional current sense amplifier

Part	Current - Supply	Slew Rate	Qualification	Gain Bandwidth Product	Mounting Type	Voltage - Supply Span (Max) [Max]	Number of Circuits	Grade	Voltage - Supply Span (Min) [Min]	Current - Input Bias	Amplifier Type	Voltage - Input Offset	-3db Bandwidth	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case [custom]	Package / Case
Texas Instruments LMP8481ASQDGKRQ1	88 µA	1 V/µs	AEC-Q100	270 kHz	Surface Mount	76 V	1	Automotive	4.5 V	6.3 µA	Current Sense	80 µV	270 kHz	125 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm
Texas Instruments LMP8481MMX-S/NOPB	88 µA	1 V/µs			Surface Mount	76 V	1		4.5 V	6.3 µA	Current Sense	80 µV	270 kHz	125 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm
Texas Instruments LMP8481MM-H/NOPB	88 µA	1 V/µs			Surface Mount	76 V	1		4.5 V	6.3 µA	Current Sense	80 µV	270 kHz	125 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm
Texas Instruments LMP8481AHQDGKRQ1	88 µA	1 V/µs	AEC-Q100	270 kHz	Surface Mount	76 V	1	Automotive	4.5 V	6.3 µA	Current Sense	80 µV	270 kHz	125 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm
Texas Instruments LMP8481MMX-H/NOPB	88 µA	1 V/µs			Surface Mount	76 V	1		4.5 V	6.3 µA	Current Sense	80 µV	270 kHz	125 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm
Texas Instruments LMP8481MMX-T/NOPB	88 µA	1 V/µs			Surface Mount	76 V	1		4.5 V	6.3 µA	Current Sense	80 µV	270 kHz	125 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm
Texas Instruments LMP8481MME-S/NOPB	88 µA	1 V/µs			Surface Mount	76 V	1		4.5 V	6.3 µA	Current Sense	80 µV	270 kHz	125 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm
Texas Instruments LMP8481MM-T/NOPB	88 µA	1 V/µs			Surface Mount	76 V	1		4.5 V	6.3 µA	Current Sense	80 µV	270 kHz	125 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm
Texas Instruments LMP8481ATQDGKRQ1	88 µA	1 V/µs	AEC-Q100	270 kHz	Surface Mount	76 V	1	Automotive	4.5 V	6.3 µA	Current Sense	80 µV	270 kHz	125 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm
Texas Instruments LMP8481MM-S/NOPB	88 µA	1 V/µs			Surface Mount	76 V	1		4.5 V	6.3 µA	Current Sense	80 µV	270 kHz	125 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 3.40
		10	$ 3.05
		25	$ 2.89
		100	$ 2.50
		250	$ 2.37
		500	$ 2.13
	Digi-Reel®	1	$ 3.40
		10	$ 3.05
		25	$ 2.89
		100	$ 2.50
		250	$ 2.37
		500	$ 2.13
	Tape & Reel (TR)	1000	$ 1.80
		2000	$ 1.71
		5000	$ 1.64
Texas Instruments	LARGE T&R	1	$ 2.88
		100	$ 2.53
		250	$ 1.77
		1000	$ 1.43

Description

General part information

LMP8481-Q1 Series

The LMP8480 and LMP8481 are precision high-side current sense amplifiers that amplify a small differential voltage developed across a current sense resistor in the presence of high input common-mode voltages. These amplifiers are designed for bidirectional (LMP8481) or unidirectional (LMP8480) current applications and accept input signals with common-mode voltage range from 4 V to 76 V with a bandwidth of 270 kHz. Because the operating power supply range overlaps the input common-mode voltage range, the LMP848x can be powered by the same voltage that is being monitored. This benefit eliminates the need for an intermediate supply voltage to be routed to the point of load where the current is being monitored, resulting in reduced component count and board space.

The LMP848x family consists of fixed gains of 20, 60, and 100 for applications that demand high accuracy over temperature. The low-input offset voltage allows the use of smaller sense resistors without sacrificing system error. The wide operating temperature range of –40°C to 125°C makes the LMP848x an ideal choice for automotive, telecommunications, industrial, and consumer applications. The LMP8480 and LMP8481 are pin-for-pin replacements for the MAX4080 and MAX4081, offering improved offset voltage, wider reference adjust range and higher output drive capabilities. The LMP8480 and LMP8481 are available in a 8-pin VSSOP package.