Water Sensor Interface ASICs

BA121S

Name: BA121S Low-range Conductivity Interface ASIC
Brand: AtomBit

Low-range Conductivity Interface ASIC

High-resolution low-conductivity measurement ASIC for purified-water and precision applications.

Downloads

Key Specifications

Interface: UART command control
Supply: 3.3 V
Measurement Range: 0–100 µS/cm

Product capabilities

Evaluate the capabilities that matter in your system

A low-range conductivity interface ASIC optimized for purified water and precision low-conductivity applications. The measurement core, NTC correction and UART output are integrated in SOP8.

0.1 µS/cm resolution

0–100 µS/cm range with 0.1 µS/cm resolution and error below 2% F.S.

Automatic temperature correction

0–100 °C temperature range with ±0.5 °C reference accuracy.

Single-channel conductivity measurement

3.3 V supply; ripple below 10 mV is specified for low-level measurement stability.

Bipolar drive reduces polarization

UART 9600 bps command interface and current below 3 mA.

Overview

Product overview

A low-range conductivity interface ASIC optimized for purified water and precision low-conductivity applications. The measurement core, NTC correction and UART output are integrated in SOP8.

High-resolution low-conductivity measurement ASIC for purified-water and precision applications. • 0.1 µS/cm resolution • Automatic temperature correction • Single-channel conductivity measurement • Bipolar drive reduces polarization • UART-controlled compact design

Engineering notes

Selection and system integration

010–100 µS/cm range with 0.1 µS/cm resolution and error below 2% F.S.
020–100 °C temperature range with ±0.5 °C reference accuracy.
033.3 V supply; ripple below 10 mV is specified for low-level measurement stability.
04UART 9600 bps command interface and current below 3 mA.

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: 0–100 µS/cm
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
Treat power-supply noise, board leakage and connector contamination as part of the error budget.
02
Use a probe and cell constant intended for low-conductivity water.
03
Validate zero behavior and span using freshly prepared low-conductivity standards.

Public documents

Datasheets and product documents

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

PDF

Product documentBA121S 中文规格书Download file ↓

BA121S

Low-range Conductivity Interface ASIC