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Isolated ±10V, 4-20mA ADC

Isolated ±10V, 4-20mA ADC

This Tibbit is an isolated 24-bit ±10V and 4–20mA Sigma-Delta (Σ-Δ) analog-to-digital converter (ADC). It offers two differential ±10V channels or four 0–10V single-ended channels, as well as two single-ended current-sinking channels.

#61 2

551,84 lei

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Form: H2

Power:

  • 5V - Consumes 35mA

Mates with:

Details

This Tibbit is an isolated 24-bit ±10V and 4–20mA Sigma-Delta (Σ-Δ) analog-to-digital converter (ADC). It offers two differential ±10V channels or four 0–10V single-ended channels, as well as two single-ended current-sinking channels. All lines feature overvoltage protection (OVP), overcurrent protection (OCP), and electrostatic discharge (ESD) transients. The integrated ADC chip provides sampling rates ranging from 1.25SPS to 31.25kSPS.

The library that drives this Tibbit handles all calculations and conversion corrections without requiring any MCU integration into the Tibbit. An onboard EEPROM is included to store calibration coefficients, which are determined at the factory and cannot be modified by the user. This EEPROM is write-protected. The Tibbit interfaces with the host CPU of the Tibbo Project PCB (TPP) via a galvanically isolated SPI port and reads calibration parameters via an I2C interface to compensate for non-linearity or offset of the ADC chip.

Tibbit #61-2 operates using only a main 5V power source. To accept inputs greater than 5V, the internal ADC chip operates on a single supply, while internal DC-DC converters generate the voltage rails required for operation. Therefore, there is no need for an external dual-rail power (Tibbit #12).

This Tibbit is an H2T hybrid Tibbit that incorporates a 9-pin terminal block into the design. As a result, it does not mate with any other Tibbit. The Tibbit’s analog front-end is completely isolated from the digital interface, and the isolated ground is exposed on pin #5 of the terminal block. We recommend against connecting this line to the TPS ground to maintain isolation and ensure the Tibbit’s precision.

LEDs

Control lines A~F are each equipped with an LED. All the lines have red LEDs except MISO and SDA lines. The MISO line is equipped with a green LED, while the SDA line has a yellow LED. An LED will turn on when the state of its corresponding line is LOW.

Library Support

Tibbit #61-2 is supported by a Tibbo BASIC library, which takes care of calculations and conversions for you. In addition, Tibbit #61-2 is fully supported in AppBlocks, our no-code, flowchart-based, in-browser hardware configurator and development platform.

You can also refer to Tibbit #61's sample project for integration support.

Control Lines

This Tibbit has six control lines:

Pin Description
-CS The chip select pin of the Tibbit for SPI interface.
SCLK The clock input of the Tibbit. The host CPU uses this line to feed the clock for data transmissions.
MOSI This is the data in (DIN) of the Tibbit for SPI interface. Used by the host CPU to transfer data from the host CPU to the Tibbit.
MISO This is the data out (DOUT) of the Tibbit for SPI interface. Used by the Tibbit to transfer data from the Tibbit to the host CPU.
SCL The clock input line of the EEPROM.
SDA The data line of the EEPROM.

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Isolated ±10V, 4-20mA ADC

Isolated ±10V, 4-20mA ADC

This Tibbit is an isolated 24-bit ±10V and 4–20mA Sigma-Delta (Σ-Δ) analog-to-digital converter (ADC). It offers two differential ±10V channels or four 0–10V single-ended channels, as well as two single-ended current-sinking channels.

Write your review

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