Water Sensor Interface ASICs

BA111

Name: BA111 Single-channel TDS Sensor Interface ASIC
Brand: AtomBit

Single-channel TDS Sensor Interface ASIC

Highly integrated TDS and water-temperature measurement ASIC with bipolar probe drive and UART control.

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Key Specifications

Interface: UART command control
Supply: 3.3 V
Measurement Range: 0–3000 ppm TDS

Product capabilities

Evaluate the capabilities that matter in your system

A single-channel TDS and temperature interface ASIC that integrates bipolar probe excitation, conversion, compensation and UART output. It is intended for compact appliances that need a proven 0–3000 ppm measurement core.

0–3000 ppm TDS measurement

0–3000 ppm TDS, error below 2% F.S.; 0–100 °C, ±0.5 °C.

TDS temperature correction

3.3 V supply with ripple below 20 mV and current below 3 mA.

Single-channel measurement

UART 9600 bps command interface in an SOP8 package.

Bipolar drive reduces probe polarization

Bipolar excitation reduces electrode polarization; an NTC probe enables automatic temperature correction.

Overview

Product overview

Highly integrated TDS and water-temperature measurement ASIC with bipolar probe drive and UART control. • 0–3000 ppm TDS measurement • TDS temperature correction • Single-channel measurement • Bipolar drive reduces probe polarization • Minimal external circuitry

Engineering notes

Selection and system integration

010–3000 ppm TDS, error below 2% F.S.; 0–100 °C, ±0.5 °C.
023.3 V supply with ripple below 20 mV and current below 3 mA.
03UART 9600 bps command interface in an SOP8 package.
04Bipolar excitation reduces electrode polarization; an NTC probe enables automatic temperature correction.

Technical data

Key Specifications

Use this information for initial selection; confirm final design and purchasing against the current approved datasheet and sample.

Interface: UART command control
Supply: 3.3 V
Measurement Range: 0–3000 ppm TDS
Accuracy: < 2% F.S.
Temperature: 0–100 °C, ±0.5 °C

Application readiness

Installation, calibration and validation

Validate the product with real samples, final mechanics and the intended electrical environment before production.

01
Match the external resistor to the NTC resistance used in the selected probe.
02
Keep the analog supply clean and observe 3.3 V digital input limits.
03
Perform application calibration with the final probe, cable, enclosure and representative water.

Public documents

Datasheets and product documents

Documents are based on AtomBit public product information; confirm the current revision before design release.

PDF

Product documentBA111 中文规格书Download file ↓

BA111

Single-channel TDS Sensor Interface ASIC