SNOSD29D December 2016  – November 2017 TLV8541 , TLV8542 , TLV8544

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (continued)
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2ESD Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5Electrical Characteristics
    6. 7.6Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
    4. 8.4Device Functional Modes
      1. 8.4.1Rail-To-Rail Input
      2. 8.4.2Supply Current Changes Over Common Mode
      3. 8.4.3Design Optimization With Rail-To-Rail Input
      4. 8.4.4Design Optimization for Nanopower Operation
      5. 8.4.5Common-Mode Rejection
      6. 8.4.6Output Stage
      7. 8.4.7Driving Capacitive Load
  9. Application and Implementation
    1. 9.1Application Information
    2. 9.2Typical Application: Battery-Powered Wireless PIR Motion Detectors
      1. 9.2.1Design Requirements
      2. 9.2.2Detailed Design Procedure
        1. 9.2.2.1Calculation of the Cutoff Frequencies and Gain of Stage A:
        2. 9.2.2.2Calculation of the Cutoff Frequencies and Gain of Stage B
        3. 9.2.2.3Calculation of the Total Gain of Stages A and B
        4. 9.2.2.4Window Comparator Stage
        5. 9.2.2.5Reference Voltages
      3. 9.2.3Application Curve
    3. 9.3Typical Application: 60-Hz Twin T Notch Filter
      1. 9.3.1Design Requirements
      2. 9.3.2Detailed Design Procedure
      3. 9.3.3Application Curve
    4. 9.4Dos and Don'ts
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
  12. 12Device and Documentation Support
    1. 12.1Device Support
      1. 12.1.1Development Support
    2. 12.2Documentation Support
      1. 12.2.1Related Documentation
    3. 12.3Related Links
    4. 12.4Receiving Notification of Documentation Updates
    5. 12.5Community Resources
    6. 12.6Trademarks
    7. 12.7Electrostatic Discharge Caution
    8. 12.8Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Features

  • For Cost-Optimized Systems
  • Nanopower Supply Current: 500 nA per Channel
  • Offset Voltage: 3.1 mV (maximum)
  • TcVos: 0.8 µV/°C
  • Gain Bandwidth: 8 kHz
  • Unity-Gain Stable
  • Low Input-Bias Current: 100 fA
  • Wide Supply Range: 1.7 V to 3.6 V
  • Rail-to-Rail Input and Output (RRIO)
  • Temperature Range –40°C to +125°C
  • Industry Standard Package
    • Quad in 14-pin TSSOP and SOIC
    • Dual in 8-pin SOIC
    • Single in 5-pin SOT-23
  • Leadless Package
    • Dual in 8-Pin X2QFN

Applications

  • Motion Detectors Using PIR Sensors SNAA301
  • Motion Detectors Using Microwave Sensors
  • Gas Detectors
  • Ionization Smoke Alarms
  • Thermostats
  • Remote Sensors, IoT (Internet of Things)
  • Active RFID Readers and Tags
  • Portable Medical Equipment
  • Glucose Monitoring

Description

The TLV854x ultra-low-power operational amplifiers (op amps) are intended for cost-optimized sensing applications in wireless and low-power wired equipment. The TLV854x family of op amps minimize power consumption in equipment such as motion detecting security systems (like microwave and PIR motion sensing) where operational battery life is critical. They also have a carefully designed CMOS input stage, enabling very low, femto-ampere bias currents, thereby reducing IBIAS and IOS errors that would otherwise impact sensitive applications. Examples of these include transimpedance amplifier (TIA) configurations with megaohm feedback resistors, and high source impedance sensing applications. Additionally, built-in EMI protection reduces sensitivity to unwanted RF signals from sources such as mobile phones, WiFi, radio transmitters and tab readers.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE
TLV8544 TSSOP (14)5.00 mm × 4.40 mm
SOIC (14) Preview8.65 mm × 3.91 mm
TLV8542SOIC (8)4.9 mm × 3.90 mm
X2QFN (8) Preview1.50 mm × 1.50 mm
TLV8541SOT-23 (5)2.90 mm x 1.60 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Nanopower Amplifiers Family

FAMILY CHANNEL COUNT IQ PER CHANNELVOS (MAXIMUM) VSUPPLY
TLV854x1, 2, 4 500 nA3.1 mV1.7 to 3.6 V
TLV880x1, 2320 nA4.5 mV1.7 to 5.5 V
LPV81x 1, 2 425 nA0.3 mV1.6 to 5.5 V

Low Power PIR Motion Detector

TLV8544 TLV8542 TLV8541 MOTION-Detec-BD_SNOSD29-2.png