LMP8480 Datasheet, PDF (1/24 Pages) Texas Instruments – Precision 76V High-Side Current Sense Amplifiers with Voltage Output

LMP8480, LMP8481
www.ti.com
SNVS829A – JUNE 2012 – REVISED AUGUST 2012
LMP8480 / LMP8481 Precision 76V High-Side Current Sense Amplifiers with Voltage
Output
Check for Samples: LMP8480, LMP8481
FEATURES
1
•2 Typical values, T_A = 25°C
• Bi-Directional or Uni-Directional Sensing
• Common Mode Voltage Range 4.0V to 76V
• Supply Voltage Range 4.5V to 76V
• Fixed Gains 20, 50, 60 and 100 V/V
• Gain Accuracy ±0.1%
• Offset ±80µV
• Bandwidth (-3dB) 270KHz
• Quiescent Current <100µA
• Buffered High-Current Output >5mA
• Input Bias Current 7µA
• PSRR (DC) 122dB
• CMRR (DC) 124dB
• Temperature Range -40 to +125°C
• MSOP-8 or LLP-8 Packages
APPLICATIONS
• High-side current sense
• Vehicle current measurement
• Telecommunications
• Motor controls
• Laser or LED Drivers
• Energy Management
• Solar Panel Monitoring
DESCRIPTION
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
will accept input signals with common-mode voltage range from 4V to 76V with a bandwidth of 270 kHz.
Since 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, 50, 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 -40C to 125C 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 MSOP package and the LMP8481 is also available in a
8–pad LLP.
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated