SDI-12 / ANALOG Interface Module
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V1.0 TBS02B SDI-12 / ANALOG Interface Module The TBS02B SDI-12 / ANALOG module is a SDI-12 interface for A/D conversion of sensor signals. A/D conversion and configuration of TBS02B is controlled by SDI-12 commands. This is a Plug and Play module which targets cost sensitive sensor applications. It offers low current consumption, small footprint and easy integration into sensor products which require a SDI-12 interface. The user does not need to invest any time for the implementation of the SDI-12 protocoil and interface hardware, as this is an integral part of the SDI-12 / ANALOG interface module. The TB02B contains all the necessary components for a complete SDI-12 sensor interface. It includes SDI-12 front-end, controller, crystal and passive components. The TBS02B is a fully compatible replacement of theTBS02A. The TBS02B has been engineered specifically for applications where cost, performance, time to market and ease of integration are prime considerations. DATA RECORDER ■ Reference voltage input ■ Power Down Mode ■ SDI-12 Standard V1.3 ■ Plug and Play ■ 3.3V, 5V supply voltage ■ 19 mm x 18 mm SMT footprint ■ 2.3mm module thickness ■ Operating Temperature Range: - 40°C - + 85°C Target Applications ■ SDI-12 Sensors Features ■ SDI-12 / ANALOG Interface ■ 8 x 12 Bit ADC channels ■ 1 x 12 Bit DAC output ■ Integrated 12 Bit temperature sensor ■ 8 x digital output - configurable sensor power management signal for each channel ■ Configurable slope and offset for each channel ■ Configurable format for each channel ■ Integrated temperature sensor with +/- 0.5 degree accuracy © 2013 Tekbox Digital Solutions 50/11 Truong Son, F2 | Q. Tan Binh | Ho Chi Minh City | Tel +84 (83)5471340 | E-mail office@tekbox.net| www.tekb

1.1 Product Features 2 BLOCK LEVEL DIAGRAM 3 FUNCTIONAL DESCRIPTION 3.2 Power Supplies 4 PIN ASSIGNMENT AND DESCRIPTION 4.2.4 Digital Control Outputs - CTRL_[0. ..7] 4.2.5 External Reset - /RESET 4.2.8 SDI-12 Data Interface Supply Voltage - VCC_5V 4.2.9 Main Module Supply Voltage - VCC_3V3 5.1 Absolute maximum ratings 5.2 Electrical Specifications 6 MECHANICAL SPECIFICATIONS, PIN ASSIGNMENT 5.1 Package outline and recommend layout 5.1.1 Pad Dimensions Pad Dimension Table 5.1.2 Package Dimensions Pin centre Location Table

6.15 GET DEFAULT VALUE 7 APPLICATION CIRCUIT, TBS02B EVALUATION BOARD 8 ENVIRONMENTAL SPECIFICATIONS 9 SOLDERING PROFILE 10 PACKAGING 11 ESD SAFETY 12 ROHS COMPLIANCE 13 ORDERING INFORMATION 12 HISTORY Tables Table 1 - Pin list Table 2 - Absolute maximum ratings Table 3 - Electrical Specifications Table 4 - Environmental Specifications Table 5 - Pb-free process - package peak reflow temperatures Figures Figure 1 -TBS02B Block Diagram Figure 2 - Pad Dimensions Figure 3 - Package Dimensions Figure 4 - Package details Figure 5 - Standard Application Example Figure 6 - Pb-free process - package...

V1.4 Datasheet TBS02B SDI-12 / ANALOG Interface Module 1 Introduction SDI-12 is a standard for interfacing data recorders with microprocessor-based sensors. SDI-12 stands for serial/digital interface at 1200 baud. It can connect multiple sensors with a single data recorder through one cable. It supports up to 60 meters of cable between a sensor and a data logger. The SDI-12 standard is prepared by SDI-12 Support Group (Technical Committee) 165 East 500 South River Heights, Utah 435-752-4200 435-752-1691 (FAX) http://www.sdi-12.org The latest standard is version V1.3 and dates from July...

V1.4 Datasheet TBS02B SDI-12 / ANALOG Interface Module Firmware feature overview: Measurement commands to measure the voltages at the eight ADC input channels (M, C, R) Measurement commands to measure temperature Extended SDI-12 command to set sensor ID Extended SDI-12 command to define the response time of each channel Extended SDI-12 command to define the turn off delay time of each power management signal (define delay time for deactivation; the digital signal will go active after receiving a measurement command and become deactivated after a time defined by the extended...

V1.4 Datasheet TBS02B SDI-12 / ANALOG Interface Module 3 Functional Description 3.1 Interface function The SDI-12 standard defines a set of commands to configure sensors and to initiate measurements. Upon receiving specific commands, the sensor may carry out internal tasks, respond with information on conversion time or send measurement data. SDI-12 commands are typically ASCII strings generated by the data recorder/controller firmware. The TBS02B is connected to the SDI-12 interface of the data recorder controller and interpretes the command strings. Furthermore, theTBS02B module handles...

V1.4 Datasheet TBS02B SDI-12 / ANALOG Interface Module # 4.2 Module Pin Descriptions 4.2.1 V_REF ADC reference voltage input. Recommended reference voltage: 3V or 3.3V The outputs go active immediately after receiving a measurement command and go inactive upon delivery of the measurement command. Extended SDI-12 commands can be used to keep it active for a delay of up to 999 seconds after delivering the measurement result.

V1.4 Datasheet TBS02B SDI-12 / ANALOG Interface Module 4.2.5 External Reset - /RESET The /Reset pin can be left unconnected. The module has an internal Power On Reset, Power Down Reset and Brown Out Detection. 4.2.6 SDI-12_Data Bi-directional SDI-12 data interface according SDI-12 standard. 4.2.7 RESERVED Do not connect this pin. 4.2.8 SDI-12 Data Interface Supply Voltage - VCC_5V Positive 5V supply voltage for the SDI-12 data interface. Positive 3,3V supply voltage. 5 Electrical Characteristics 5.1 Absolute maximum ratings Stress above the limits listed in the following table may cause...

V1.4 Datasheet TBS02B SDI-12 / ANALOG Interface Module5.2 Electrical Specifications Temperature TA = 20°C, VCC_3V3 = 3.3V, VCC_5V = 5V, unless otherwise stated Table 3 - Electrical Specifications

V1.4 Datasheet TBS02B SDI-12 / ANALOG Interface Module6 Mechanical Specifications, Pin assignment 5.1 Package outline and recommend layout