SNOSAR2H September   2008  – April 2016 LMP8601 , LMP8601-Q1 , LMP8602 , LMP8602-Q1 , LMP8603 , LMP8603-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings: LMP860x
    3. 6.3 ESD Ratings: LMP860x-Q1
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Thermal Information
    6. 6.6 Electrical Characteristics: VS = 3.3 V
    7. 6.7 Electrical Characteristics: VS = 5 V
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Theory of Operation
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Offset Input Pin
      2. 7.3.2 Additional Second-Order Low-Pass Filter
    4. 7.4 Device Functional Modes
      1. 7.4.1 Gain Adjustment
        1. 7.4.1.1 Reducing Gain
        2. 7.4.1.2 Increasing Gain
      2. 7.4.2 Driving Switched Capacitive Loads
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Specifying Performance
    2. 8.2 Typical Applications
      1. 8.2.1 High-Side, Current-Sensing Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Low-Side, Current-Sensing Application
      3. 8.2.3 Battery Current Monitor Application
      4. 8.2.4 Advanced Battery Charger Application
      5. 8.2.5 Current Loop Receiver Application
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
    2. 11.2 Related Links
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Gain = 20x for LMP8601 and LMP8601-Q1
  • Gain = 50x for LMP8602 and LMP8602-Q1
  • Gain = 100x for LMP8603 and LMP8603-Q1
  • TCVOS: 10 μV/°C Maximum
  • CMRR: 90-dB Minimum
  • Input Offset Voltage: 1-mV Maximum
  • CMVR at VS = 3.3 V: –4 V to 27 V
  • CMVR at VS = 5 V: –22 V to 60 V
  • Single-Supply Bidirectional Operation
  • All Minimum and Maximum Limits 100% Tested
  • Q1 Devices Qualified for Automotive Applications
  • Q1 Devices ACE-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device Temperature Grade 0: –40°C to 150°C (LMP8601EDRQ1 Only)
    • Device HBM ESD Classification Level 2
      (3A on inputs)
    • Device CDM ESD Classification Level C6
    • Device MM ESD Classification Level M2

2 Applications

  • High-Side and Low-Side Driver Configuration Current Sensing
  • Bidirectional Current Measurement
  • Current Loop to Voltage Conversion
  • Automotive Fuel Injection Control
  • Transmission Control
  • Power Steering
  • Battery Management Systems

3 Description

The LMP8601, LMP8602, LMP8603 (LMP860x) and LMP8601-Q1, LMP8602-Q1, LMP8603-Q1 (LMP860x-Q1) devices are fixed-gain, precision current-sense amplifiers (also referred to as current-shunt monitors). The input common-mode voltage range is –22 V to +60 V when operating from a single 5-V supply, or –4 V to +27 V with a 3.3-V supply. The LMP860x and LMP860x-Q1 are ideal parts for unidirectional and bidirectional current sensing applications.

These devices have a precise gain of 20x (LPM8601, LPM8601-Q1), 50x (LPM8602, LPM8602-Q1), and 100x (LPM8603, LPM8603-Q1), and are adequate in most targeted applications to drive an ADC to full-scale value. The fixed gain is achieved in two separate stages: a preamplifier with a gain of 10x and an output stage buffer amplifier with a gain of 2x (LMP8601, LMP8601-Q1), 5x (LMP8602, LMP8602-Q1), or 10x (LMP8603, LMP8603-Q1). The path between the two stages is brought out on two pins to enable the option of an additional filter network or modifying the gain.

The offset input pin enables these devices for unidirectional or bidirectional single supply voltage current sensing.

The LMP860x-Q1 devices incorporate enhanced manufacturing and support processes for the automotive market and are compliant with the AEC-Q100 standard.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LMP860x SOIC (8) 4.90 mm x 3.91 mm
LMP860x-Q1
LMP8602, LMP8603 VSSOP (8) 3.00 mm × 3.00 mm
LMP8602-Q1, LMP8603-Q1
  1. For all available packages, see the package option addendum at the end of the data sheet.

Typical Applications

LMP8601 LMP8601-Q1 LMP8602 LMP8602-Q1 LMP8603 LMP8603-Q1 20157101.gif