Overview
A very small automatic TDS ASIC for cost- and space-sensitive products. It measures periodically and transmits the result from a Tx-only output, reducing MCU software and package footprint.
Sensor Interface ASICsCurrent model
BA311
Miniature TDS Sensor Interface ASIC | TDS sensor IC
Compact automatic TDS measurement ASIC in SOT23-6 for space-constrained smart-water products.
Original manufacturer · Factory-direct supply
Questions go straight to the source
Ask about parameters, interfaces, calibration, versions, customization or volume supply. The answer does not need to pass through layers of resellers.
- In-house R&DOptics, sensor-interface electronics, algorithms, firmware and mechanical integration are developed as one product system.
- Production capabilityFrom prototype and pilot build to assembly, functional testing and volume delivery, production follows the product team’s technical definition.
- Quality traceabilityModel, specification, firmware or hardware version and test requirements remain connected, reducing ambiguity between sales claims and delivered goods.
Overview
Why this product
Compact automatic TDS measurement ASIC in SOT23-6 for space-constrained smart-water products.
A very small automatic TDS ASIC for cost- and space-sensitive products. It measures periodically and transmits the result from a Tx-only output, reducing MCU software and package footprint.
Compact automatic TDS measurement ASIC in SOT23-6 for space-constrained smart-water products.
- ✓0–3000 ppm TDS measurement
- ✓Automatic 300 ms measurement cycle
- ✓3–5 V wide-voltage supply
- ✓Bipolar drive reduces probe polarization
- ✓BURST Tx data output and SOT23-6 package
Verified technical detail
Information to provide for selection · Calibration, validation and maintenance
Compact automatic TDS measurement ASIC in SOT23-6 for space-constrained smart-water products.
Interface / Supply
BURST data output (Tx) · 3–5 V
Measurement Range / Accuracy
0–3000 ppm TDS · < 2% F.S.
Installation and commissioning
Design the host to receive the periodic Tx-only data stream; there is no command Rx pin.
Verified technical detail
Engineering and integration
The official Chinese document is currently shared by every language version.
Engineering and integration
- 01
0–3000 ppm TDS with error below 2% F.S.
- 01
3–5 V wide supply; approximately 1.6 mA average at 3.3 V in clean water.
- 01
Automatic result output every 300 ms through UART Tx-only, 9600 bps.
- 01
SOT23-6 package and -40 to +85 °C operating temperature grade.
Installation and commissioning
- ✓
Design the host to receive the periodic Tx-only data stream; there is no command Rx pin.
- ✓
Account for supply-referenced digital output level when connecting the MCU.
- ✓
Calibrate with the final probe and mechanical arrangement because immersion geometry affects the scale factor.
Product and document views
Public documents
BA311 中文规格书Applications
Typical applications
Use the product as part of a complete measurement workflow, not as an isolated component. Confirm the water matrix, target range and decision that the data must support.
Drinking Water & Purification
Integrated TDS and conductivity components for dispensers, purifiers, filter-life estimation and quality indication.
Industrial Process Water
Digital sensors and embedded ASICs for equipment builders, automation systems and water-intensive production.
Smart Appliances
Small-footprint sensing electronics for connected water devices, pet appliances and intelligent home products.
Typical applications are reference cases, not capability limits.
Propose a new application →The applications above are common examples. If this measurement principle may solve a different problem in your field, we welcome a feasibility discussion.
Technology
From selection to reliable data
- 01
Define the measurement objective and expected range.
- 02
Match the sensor, probe or analyzer to the real sample matrix.
- 03
Complete mechanical, electrical and communication integration.
- 04
Validate results with reference samples before routine operation.
Engineered for dependable integration
Integration and installation checklist
- ✓Target parameters and expected concentration range
- ✓Water matrix, fouling risk and installation method
- ✓Communication interface and sampling frequency
- ✓Calibration, validation and maintenance strategy
- ✓Information to provide for selection: BA311 · Sensor Interface ASICs
Calibration, validation and maintenance
Validate the complete system with representative samples. Record the reference method, temperature and installation conditions. Recheck after cleaning, replacement or process changes, and define a maintenance interval from actual fouling rather than a fixed assumption.
FAQ
Frequently asked questions
Is this product ready to use in every water matrix?
The product platform is defined, but range, calibration and installation must still be confirmed against the actual water matrix and project objective.
What should be checked before integration?
Confirm power, interface, cable length, enclosure, sampling frequency, probe position and the host system data format.
How should measurement quality be verified?
Compare representative samples with an agreed reference method and document the acceptance criteria before commissioning.
Can datasheets, protocol information and engineering support be supplied?
Yes. Ask for the current ordering specification and describe your application so the correct materials can be supplied.
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