LSC2416
Ultra-high resolution 24-bit sigma-delta ADC with integrated PGA, suitable for precision measurement and sensor appli...
Product Overview
Description
The LSC2416 is a precision 24-bit sigma-delta ADC designed for high-resolution measurement applications.
With outstanding noise performance and integrated temperature sensor, this ADC is ideal for weigh scales and temperature measurement.
The device features an I2C-compatible interface and low power consumption for battery-powered applications.
Product Series
LSC
Primary Application
Weigh scales and load cells
Key Features
- 24-bit resolution with 22-bit ENOB
- Integrated PGA with gains from 1x to 128x
- Low noise: 30nV RMS at PGA=128
- Programmable output data rate
- Internal temperature sensor
- Low power: 300µA operating current
Specifications
| Resolution | 24-bit |
|---|---|
| ENOB | 22 bits (PGA=1) |
| PGA Gain | 1x to 128x |
| Input Channels | 2 differential |
| Output Data Rate | 5 SPS to 2k SPS |
| Interface | I2C |
| Power Supply | 2.7V to 5.25V |
| Temperature Range | -40°C to +125°C |
| Package | MSOP-10, QFN-16 |
Applications
Weigh scales and load cells
Electronic system design
Temperature measurement
Data acquisition and conversion
Pressure sensors
Sensor signal conditioning
Battery monitoring
Battery and charging management
Portable instrumentation
Electronic system design
FAE Expert Insights
"The LSC2416 is an excellent choice for precision measurement applications. The integrated PGA with gains up to 128x eliminates the need for external amplification in many sensor applications. I've used this successfully in weigh scale designs where the low noise floor is critical."
Excellent noise performance and integrated PGA simplify sensor interface design
— Sarah Zhang, BeiLuo
Frequently Asked Questions
What is the effective resolution at different PGA gains?
The effective number of bits (ENOB) varies with PGA gain setting. At PGA=1x, the LSC2416 achieves 22-bit ENOB. At PGA=8x, expect approximately 21-bit ENOB. At PGA=128x, the ENOB is approximately 19 bits due to increased noise at higher gains.
Calculate required resolution based on your sensor output and noise requirements.
How do I optimize output data rate vs. noise performance?
The LSC2416 allows trade-off between output data rate and noise performance. Lower data rates (5-10 SPS) provide the best noise performance with effective filtering of 50/60Hz power line interference. Higher data rates provide faster response but with higher noise.
Use lower data rates for best noise; higher rates for faster response.
What is the input impedance of LSC2416?
The LSC2416 features very high input impedance, typically greater than 1 GΩ, which minimizes loading effects on sensors and allows direct connection to high-impedance sources. This high input impedance is maintained across all PGA gain settings.
Suitable for direct connection to high-impedance sensors without buffering.
How do I calibrate the LSC2416 for best accuracy?
The LSC2416 supports system calibration to remove offset and gain errors. Calibration is performed by applying known input voltages (typically near zero and full-scale) and calculating correction coefficients. The calibration values are stored in registers and applied to conversion results automatically.
Perform calibration at system level for best accuracy; store calibration values in non-volatile memory.
Can I use multiple LSC2416 devices on the same I2C bus?
Yes, the LSC2416 supports I2C address selection through external pins, allowing up to 4 devices on the same I2C bus. Each device can be addressed independently for multi-channel data acquisition systems.
Use address pins to configure unique addresses for each device on the bus.