SNIS146B March   2007  – October 2017 LM95214

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 Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics: Temperature-to-Digital Converter
    6. 6.6 Logic Electrical Characteristics: Digital DC Characteristics
    7. 6.7 Switching Characteristics: SMBus Digital
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Conversion Sequence
      2. 7.3.2 Power-On-Default States
      3. 7.3.3 SMBus Interface
      4. 7.3.4 Temperature Conversion Sequence
        1. 7.3.4.1 Digital Filter
      5. 7.3.5 Fault Queue
      6. 7.3.6 Temperature Data Format
      7. 7.3.7 SMBDAT Open-Drain Output
      8. 7.3.8 TCRIT1, TCRIT2, and TCRIT3 Outputs
      9. 7.3.9 TCRIT Limits and TCRIT Outputs
    4. 7.4 Device Functional Modes
      1. 7.4.1 Diode Fault Detection
      2. 7.4.2 Communicating With the LM95214
      3. 7.4.3 Serial Interface Reset
      4. 7.4.4 One-Shot Conversion
    5. 7.5 Register Maps
      1. 7.5.1 LM95214 Registers
        1. 7.5.1.1 Value Registers
          1. 7.5.1.1.1 Local Value Registers
          2. 7.5.1.1.2 Remote Temperature Value Registers With Signed Format
          3. 7.5.1.1.3 Remote Temperature Value Registers With Unsigned Format
        2. 7.5.1.2 Diode Configuration Register
          1. 7.5.1.2.1 Remote 1-4 Offset
        3. 7.5.1.3 Configuration Registers
          1. 7.5.1.3.1 Main Configuration Register
          2. 7.5.1.3.2 Conversion Rate Register
          3. 7.5.1.3.3 Channel Conversion Enable
          4. 7.5.1.3.4 Filter Setting
          5. 7.5.1.3.5 1-Shot
        4. 7.5.1.4 Status Registers
          1. 7.5.1.4.1 Common Status Register
          2. 7.5.1.4.2 Status 1 Register (Diode Fault)
          3. 7.5.1.4.3 Status 2 (TCRIT1)
          4. 7.5.1.4.4 Status 3 (TCRIT2)
          5. 7.5.1.4.5 Status 4 (TCRIT3)
        5. 7.5.1.5 Mask Registers
          1. 7.5.1.5.1 TCRIT1 Mask Register
          2. 7.5.1.5.2 TCRIT2 Mask Registers
          3. 7.5.1.5.3 TCRIT3 Mask Register
        6. 7.5.1.6 Limit Registers
          1. 7.5.1.6.1 Local Limit Register
          2. 7.5.1.6.2 Remote Limit Registers
          3. 7.5.1.6.3 Common Tcrit Hysteresis Register
        7. 7.5.1.7 Identification Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
    3. 8.3 Diode Non-Ideality
      1. 8.3.1 Diode Non-Ideality Factor Effect on Accuracy
      2. 8.3.2 Calculating Total System Accuracy
      3. 8.3.3 Compensating for Different Non-Ideality
  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 Receiving Notification of Documentation Updates
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

5 Pin Configuration and Functions

NHL Package
14-Pin WSON
Top View
LM95214 30006101.gif

Pin Functions

PIN DESCRIPTION
NO. NAME
1 NC No Connect
Not connected. May be left floating, connected to GND or VDD.
2 VDD Positive Supply Voltage Input
DC Voltage from 3.0 V to 3.6 V. VDD must be bypassed with a 0.1-µF capacitor in parallel with 100 pF. The 100-pF capacitor must be placed as close as possible to the power supply pin. Noise must be kept below 200 mVp-p, a 10-µF capacitor may be required to achieve this.
3 D4+ Diode Current Source
Fourth Diode Anode. Connected to remote discrete diode-connected transistor junction or to the diode-connected transistor junction on a remote IC whose die temperature is being sensed. A capacitor is not required between D4+ and D–. A 100 pF capacitor between D4+ and D– can be added and may improve performance in noisy systems. Float this pin if this thermal diode is not used.
4 D3+ Diode Current Source
Third Diode Anode. Connected to remote discrete diode-connected transistor junction or to the diode-connected transistor junction on a remote IC whose die temperature is being sensed. A capacitor is not required between D3+ and D–. A 100-pF capacitor between D3+ and D– can be added and may improve performance in noisy systems. Float this pin if this thermal diode is not used.
5 D− Diode Return Current Sink
All Diode Cathodes. Common D– pin for all four remote diodes.
6 D2+ Diode Current Source
Second Diode Anode. Connected to remote discrete diode-connected transistor junction or to the diode-connected transistor junction on a remote IC whose die temperature is being sensed. A capacitor is not required between D2+ and D–. A 100-pF capacitor between D2+ and D– can be added and may improve performance in noisy systems. Float this pin if this thermal diode is not used.
7 D1+ Diode Current Source
First Diode Anode. Connected to remote discrete diode-connected transistor junction or to the diode-connected transistor junction on a remote IC whose die temperature is being sensed. A capacitor is not required between D1+ and D–. A 100-pF capacitor between D1+ and D– can be added and may improve performance in noisy systems. Float this pin if this thermal diode is not used.
8 GND Power Supply Ground -- System low noise ground.
9 A0 Digital Input
SMBus slave address select pin. Selects one of three addresses. Can be tied to VDD, GND, or to the middle of a resistor divider connected between VDD and GND.
10 TCRIT1 Digital Output, Open-Drain
Critical temperature output 1. Requires pullup resistor. Active LOW.
11 TCRIT2 Digital Output, Open-Drain
Critical temperature output 2. Requires pullup resistor. Active LOW.
12 SMBDAT SMBus Bidirectional Data Line, Open-Drain Output
From and to Controller; may require an external pullup resistor
13 SMBCLK SMBus Clock Input
From Controller; may require an external pullup resistor
14 TCRIT3 Digital Output, Open-Drain
Critical temperature output 3. Requires pullup resistor. Active LOW.

Table 1. ESD Protection

PIN NO. LABEL CIRCUIT CIRCUITS FOR PIN ESD PROTECTION STRUCTURE
1 NC – LM95214 30006104.gif                
2 VDD A
3 D4+ A
4 D3+ A
5 D- A
6 D2+ A
7 D1+ A Circuit A
8 GND – LM95214 30006105.gif                   
9 A0 B
10 TCRIT1 B
11 TCRIT2 B
12 SMBDAT B
13 SMBCLK B
14 TCRIT2 B Circuit B