SNAS633A March   2014  – September  2014 LMP93601

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Thermopile Array System Diagram
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Recommended Operating Conditions
    3. 7.3 Thermal Information
    4. 7.4 Electrical Characteristics
    5. 7.5 Timing Requirements
    6. 7.6 Noise Performance
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Data Format
      2. 8.3.2  Transfer Function
      3. 8.3.3  Input Routing Mux
      4. 8.3.4  Programmable Gain Amplifier
      5. 8.3.5  PGA Bypass Mode
      6. 8.3.6  Over-Range Detection
      7. 8.3.7  Analog-To-Digital Converter (ADC)
      8. 8.3.8  Programmable Digital Filters
      9. 8.3.9  Common Mode Voltage Generator
      10. 8.3.10 Low Drop-Out Regulator (LDO)
      11. 8.3.11 External Clock
      12. 8.3.12 Operating Modes
      13. 8.3.13 Data Ready Function (DRDYB)
      14. 8.3.14 Synchronous Serial Peripheral Interface (SPI)
      15. 8.3.15 Power Management Mode; Standby, Conversion and Shutdown
      16. 8.3.16 Power-On Sequence and Reset (POR) Function
      17. 8.3.17 Brown-Out Detection Function
      18. 8.3.18 Reset Function
    4. 8.4 Device Functional Modes
      1. 8.4.1 Single-Shot Mode
      2. 8.4.2 Continuous Mode
    5. 8.5 Programming
      1. 8.5.1 Window to Capture Data and Status
      2. 8.5.2 Single Byte Access
    6. 8.6 Register Maps
    7. 8.7 Multi Byte Access (Auto Increment) Mode
    8. 8.8 Multi-Channel Data Read
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • High Gain, Programmable up to 4096
  • Low Gain Error Drift, <10 ppm/°C
  • Low Offset Voltage and Drift; 1 uV, 50 nV/°C
  • Low Input Bias Current, 1.3 nA
  • Low Input Offset Current, 120 pA
  • VCM Output Signal for Level Shifting, AVDD/3
  • Three Differential EMI Hardened Inputs
  • 16-bit Δ∑ Analog-to-Digital Converter
  • Low Noise Performance, ENOB 15.3 bits
  • Four Output Data Rates, up to 1.3 kSPS
  • Internal Voltage Reference for ADC
  • SPI Interface Transfer Rate, 20 MHz
  • Brown-Out Detect
  • PGA Over-Range Detect
  • Separate Analog and Digital Supplies, 2.7 to 5.5 V
  • Low Current Consumption, 1.1 mA
  • Low Power Shutdown Mode, < 0.1µA
  • Operating Temp. –25 to 85 °C

2 Applications

  • Thermopile Array Measurement
  • Thermopile Flow Measurements
  • Bridge Sensor Interface
  • Gesture Recognition

3 Description

The LMP93601 is an optimized Analog-Front-End (AFE) for occupancy detecting thermopile arrays up to 16 x 16 and thermopile mass flow sensors. The AFE combines excellent noise performance, low offset voltage, high gain, and low-power consumption at sampling rates ideal for monitoring thermopile sensors.

The LMP93601 is a precision, 16-bit, analog-to-digital converter (ADC) offered in a leadless WQFN-24 package. The device features three differential EMI hardened inputs, a low-noise, high-gain programmable gain amplifier (PGA), a level shifting voltage source, an internal reference, and a programmable sampling rate. The many integrated features and the simple control of the LMP93601 through an SPI-compatible interface ease precision measurements of thermopile sensor signals.

Device Information

PART NUMBER PACKAGE BODY SIZE
LMP93601 WQFN (24) 5.00 mm x 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Simplified Thermopile Array System Diagram

app_diag_snas633.gif

Analog Supply Vs. Offset Voltage Plot

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