SBAS846 November   2017 TLA2021 , TLA2022 , TLA2024

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 I2C Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Multiplexer
      2. 8.3.2 Analog Inputs
      3. 8.3.3 Full-Scale Range (FSR) and LSB Size
      4. 8.3.4 Voltage Reference
      5. 8.3.5 Oscillator
      6. 8.3.6 Output Data Rate and Conversion Time
    4. 8.4 Device Functional Modes
      1. 8.4.1 Reset and Power-Up
      2. 8.4.2 Operating Modes
        1. 8.4.2.1 Single-Shot Conversion Mode
        2. 8.4.2.2 Continuous-Conversion Mode
    5. 8.5 Programming
      1. 8.5.1 I2C Interface
        1. 8.5.1.1 I2C Address Selection
        2. 8.5.1.2 I2C Interface Speed
        3. 8.5.1.3 Serial Clock (SCL) and Serial Data (SDA)
        4. 8.5.1.4 I2C Data Transfer Protocol
        5. 8.5.1.5 Timeout
        6. 8.5.1.6 I2C General-Call (Software Reset)
      2. 8.5.2 Reading and Writing Register Data
        1. 8.5.2.1 Reading Conversion Data or the Configuration Register
        2. 8.5.2.2 Writing the Configuration Register
      3. 8.5.3 Data Format
  9. 9 Register Maps
    1. 9.1 Conversion Data Register (RP = 00h) [reset = 0000h]
    2. 9.2 Configuration Register (RP = 01h) [reset = 8583h]
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Basic Interface Connections
      2. 10.1.2 Connecting Multiple Devices
      3. 10.1.3 Single-Ended Signal Measurements
      4. 10.1.4 Analog Input Filtering
      5. 10.1.5 Duty Cycling To Reduce Power Consumption
      6. 10.1.6 I2C Communication Sequence Example
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curve
  11. 11Power Supply Recommendations
    1. 11.1 Power-Supply Sequencing
    2. 11.2 Power-Supply Decoupling
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Related Links
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

7 Specifications

7.1 Absolute Maximum Ratings(1)

MIN MAX UNIT
Power-supply voltage VDD to GND –0.3 7 V
Analog input voltage AIN0, AIN1, AIN2, AIN3 GND – 0.3 VDD + 0.3
Digital input voltage SDA, SCL, ADDR GND – 0.3 7
Input current Continuous, any pin except power-supply pins –10 10 mA
Temperature Junction, TJ –40 125 °C
Storage, Tstg –60 125
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

7.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±500
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

7.3 Recommended Operating Conditions

over operating ambient temperature range (unless otherwise noted)
MIN NOM MAX UNIT
POWER SUPPLY
VDD to GND 2 5.5 V
ANALOG INPUTS(1)
FSR Full-scale input voltage range(2)
(VIN = VAINP – VAINN)		 ±0.256 ±6.144 V
V(AINx) Absolute input voltage GND VDD V
DIGITAL INPUTS
Digital input voltage GND 5.5 V
TEMPERATURE
TA Operating ambient temperature –40 85 °C
(1) AINP and AINN denote the selected positive and negative inputs. On the TLA2024, AINx denotes one of the four available analog inputs.
(2) This parameter expresses the full-scale range of the ADC scaling. No more than VDD + 0.3 V or 5.5 V (whichever is smaller) must be applied to this device. See the Full-Scale Range (FSR) and LSB Size section more information.

7.4 Thermal Information

THERMAL METRIC(1) TLA202x UNIT
RUG (X2QFN)
10 PINS
RθJA Junction-to-ambient thermal resistance 245.2 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 69.3 °C/W
RθJB Junction-to-board thermal resistance 172.0 °C/W
ψJT Junction-to-top characterization parameter 8.2 °C/W
ψJB Junction-to-board characterization parameter 170.8 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance N/A °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

7.5 Electrical Characteristics

minimum and maximum specifications apply from TA = –40°C to +85°C; typical specifications are at TA = 25°C; all specifications are at VDD = 3.3 V, data rate = 128 SPS, and FSR = ±2.048 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ANALOG INPUT
Common-mode input impedance FSR = ±6.144 V(1) 10 MΩ
FSR = ±4.096 V(1), FSR = ±2.048 V 6
FSR = ±1.024 V 3
FSR = ±0.512 V, FSR = ±0.256 V 100
Differential input impedance FSR = ±6.144 V(1) 22 MΩ
FSR = ±4.096 V(1) 15
FSR = ±2.048 V 4.9
FSR = ±1.024 V 2.4
FSR = ±0.512 V, ±0.256 V 710 kΩ
SYSTEM PERFORMANCE
Resolution (no missing codes) 12 Bits
DR Data rate 128, 250, 490, 920, 1600, 2400, 3300 SPS
Data rate variation All data rates –10% 10%
INL Integral nonlinearity(2) 1 LSB
Offset error ±1 LSB
Offset drift 0.01 LSB/°C
Gain error(3) 0.05%
Gain drift(3) 10 ppm/°C
PSRR Power-supply rejection ratio 85 dB
CMRR Common-mode rejection ratio 90 dB
DIGITAL INPUT/OUTPUT
VIL Logic input level, low GND 0.3 VDD V
VIH Logic input level, high 0.7 VDD 5.5 V
VOL Logic output level, low IOL = 3 mA GND 0.15 0.4 V
Input leakage current GND < VDigital Input < VDD –10 10 µA
POWER SUPPLY
IVDD Supply current Power-down 0.5 µA
Operating 150
PD Power dissipation VDD = 5 V 0.9 mW
VDD = 3.3 V 0.5
VDD = 2 V 0.3
(1) This parameter expresses the full-scale range of the ADC scaling. No more than VDD + 0.3 V or 5.5 V (whichever is smaller) must be applied to this device. See the Full-Scale Range (FSR) and LSB Size section for more information.
(2) Best-fit INL; covers 99% of full-scale.
(3) Includes all errors from onboard PGA and voltage reference.

7.6 I2C Timing Requirements

over operating ambient temperature range and VDD = 2 V to 5.5 V (unless otherwise noted)
MIN MAX UNIT
STANDARD-MODE
fSCL SCL clock frequency 10 100 kHz
tLOW Pulse duration, SCL low 4.7 µs
tHIGH Pulse duration, SCL high 4.0 µs
tHD;STA Hold time, (repeated) START condition.
After this period, the first clock pulse is generated.		 4 µs
tSU;STA Setup time, repeated START condition 4.7 µs
tHD;DAT Hold time, data 0 µs
tSU;DAT Setup time, data 250 ns
tr Rise time, SCL, SDA 1000 ns
tf Fall time, SCL, SDA 250 ns
tSU;STO Setup time, STOP condition 4.0 µs
tBUF Bus free time, between STOP and START condition 4.7 µs
tVD;DAT Valid time, data 3.45 µs
tVD;ACK Valid time, acknowledge 3.45 µs
FAST-MODE
fSCL SCL clock frequency 10 400 kHz
tLOW Pulse duration, SCL low 1.3 µs
tHIGH Pulse duration, SCL high 0.6 µs
tHD;STA Hold time, (repeated) START condition.
After this period, the first clock pulse is generated.		 0.6 µs
tSU;STA Setup time, repeated START condition 0.6 µs
tHD;DAT Hold time, data 0 µs
tSU;DAT Setup time, data 100 ns
tr Rise time, SCL, SDA 20 300 ns
tf Fall time, SCL, SDA 300 ns
tSU;STO Setup time, STOP condition 0.6 µs
tBUF Bus free time, between STOP and START condition 1.3 µs
tVD;DAT Valid time, data 0.9 µs
tVD;ACK Valid time, acknowledge 0.9 µs
TLA2021 TLA2022 TLA2024 ti_I2C_bas822.gif Figure 1. I2C Timing Requirements

7.7 Typical Characteristics

at FSR = ±2.048 V and DR = 128 SPS (unless otherwise noted)
TLA2021 TLA2022 TLA2024 D001_sbas846.gif
Figure 2. Operating Current vs Temperature
TLA2021 TLA2022 TLA2024 D003_sbas846.gif
Figure 4. Data Rate vs Temperature
TLA2021 TLA2022 TLA2024 D002_sbas846.gif
Figure 3. Power-Down Current vs Temperature