SNOSCX9A March   2015  – November 2015 LPV542

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
    3. 6.3 Recommended Operating Ratings
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics 1.8 V
    6. 6.6 Electrical Characteristics 3.3 V
    7. 6.7 Electrical Characteristics 5 V
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Rail-To-Rail Input
      2. 7.4.2 Supply Current Changes over Common Mode
      3. 7.4.3 Design Optimization With Rail-To-Rail Input
      4. 7.4.4 Design Optimization for Nanopower Operation
      5. 7.4.5 Common-Mode Rejection
      6. 7.4.6 Output Stage
      7. 7.4.7 Driving Capacitive Load
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application: 60 Hz Twin "T" Notch Filter
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
    3. 8.3 Do's and Don'ts
  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 Documentation Support
      1. 11.2.1 Related Documentation
    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

  • Wide Supply Range: 1.6 V to 5.5 V
  • Low Supply Current: 490 nA (typical/channel)
  • Good Offset Voltage: 3 mV (maximum/room)
  • Good TcVos: 1µV/°C (typical)
  • Gain-Bandwidth: 8 kHz (typical)
  • Rail-to-Rail Input and Output
  • Unity-Gain Stable
  • Low Input Bias Current : 1 pA (typ)
  • EMI Hardened
  • Temperature Range: -40°C to 125°C
  • Thin 3 mm x 3 mm x 0.45 mm X1SON package

2 Applications

  • Wearables
  • Personal Health Monitors
  • Battery Packs
  • Mobile Phones and Tablets
  • Solar-Powered or Energy Harvested Systems
  • PIR, Smoke, Gas, and Fire Detection Systems
  • Battery Powered Internet of Things (IoT) Devices
  • Remote Sensors
  • Micropower Reference Buffer

3 Description

The LPV542 is an ultra-low-power, dual operational amplifier that provides 8kHz of bandwidth from 490nA of quiescent current making it well suited for battery-powered applications such as health and fitness wearables, building automation, and remote sensing nodes.

Each amplifier has a CMOS input stage with pico-amp bias currents which reduces errors commonly introduced in megaohm feedback resistance topologies such as photodiode and charge sense applications. In addition, the input common-mode range extends to the power supply rails and the output swings to within 3 mV of the rails, maintaining the widest dynamic range possible. Likewise, EMI protection is designed into the LPV542 in order to reduce system sensitivity to unwanted RF signals from mobile phones, WiFi, radio transmitters, and tag readers.

The LPV542 operates on a supply voltage as low as 1.6 V, ensuring continuous superior performance in low battery situations. The device is available in an 8-pad, low-profile, leadless 3 mm x 3 mm x 0.45 mm X1SON package and a standard 8 pin VSSOP.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LPV542 X1SON (8) 3.00 mm x 3.00 mm
VSSOP (8) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

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Nanopower Oxygen Sensor Amplifier

LPV542 Prec_Oxy_Sens.gif

Supply Current vs. Supply Voltage

LPV542 IsVs_LowVcm.png