LSC1604
High-precision 16-bit SAR ADC with 4 differential channels, 1MSPS sampling rate, and low power consumption for indust...
Product Overview
Description
The LSC1604 is a high-performance 16-bit SAR ADC featuring four differential input channels with programmable gain amplifier.
With a sampling rate of 1 MSPS and excellent DC accuracy, this ADC is ideal for multi-channel data acquisition systems.
The device operates from a single 5V supply and supports SPI interface for easy integration.
Product Series
LSC
Primary Application
Industrial process control
Key Features
- 16-bit resolution with no missing codes
- 1 MSPS sampling rate per channel
- Programmable gain amplifier (1x, 2x, 4x, 8x)
- Internal 4.096V precision reference
- Low power consumption: 15mW at 1MSPS
Specifications
| Resolution | 16-bit |
|---|---|
| Sampling Rate | 1 MSPS |
| Channels | 4 differential / 8 single-ended |
| INL | +/- 1 LSB |
| DNL | +/- 0.5 LSB |
| SNR | 93 dB |
| Interface | SPI |
| Temperature Range | -40°C to +125°C |
| Package | TSSOP-20, QFN-24 |
Applications
Industrial process control
Industrial automation and control
Battery management systems
Battery and charging management
Motor control and drives
Motor drive and control systems
Test and measurement equipment
Data acquisition and conversion
FAE Expert Insights
"The LSC1604 has been my go-to recommendation for industrial data acquisition applications. The combination of 16-bit resolution and 1 MSPS sampling rate hits the sweet spot for most control systems. The integrated PGA eliminates the need for external signal conditioning in many applications, saving BOM cost and board space."
Excellent balance of resolution, speed, and integration for industrial applications
— Michael Chen, BeiLuo
Frequently Asked Questions
What is the maximum input voltage for LSC1604?
The LSC1604 accepts input voltages from 0V to VREF (typically 4.096V) for unipolar operation, or +/- VREF/2 for bipolar operation when configured for differential inputs. The analog input pins can tolerate voltages from -0.3V to AVDD + 0.3V without damage. For inputs beyond the reference voltage, external attenuation or signal conditioning is required.
Use external attenuation for signals exceeding VREF; consider the PGA gain settings.
How do I calculate the effective resolution with PGA gain?
When using the programmable gain amplifier (PGA), the effective resolution depends on the gain setting. With PGA gain of 1x, you get full 16-bit resolution on the +/- VREF input range. At 2x gain, the input range is halved but you still get 16-bit resolution on the smaller range, effectively giving higher resolution for small signals.
Use lowest gain setting that accommodates your signal; consider noise vs. resolution trade-off.
What is the power consumption in various operating modes?
The LSC1604 features multiple power modes to optimize energy consumption. In full-speed operation at 1 MSPS, power consumption is approximately 15mW. At reduced sampling rates, power scales proportionally. In standby mode, consumption drops to 2mW while maintaining register settings. Shutdown mode reduces consumption to less than 10µW.
Use shutdown mode for battery applications with long idle periods; standby for quick wake-up.
How do I interface LSC1604 with my microcontroller?
The LSC1604 uses a standard SPI interface with CS (chip select), SCLK (serial clock), DIN (data input), and DOUT (data output) pins. The interface supports SPI modes 0 and 3 (CPOL=0/1, CPHA=0). Conversion is initiated by bringing CS low and clocking in the channel selection and configuration bits.
Use provided reference code; ensure SPI mode matches (0 or 3); check clock polarity.
What is the recommended PCB layout for LSC1604?
For optimal performance, place decoupling capacitors (0.1µF ceramic) as close as possible to AVDD and DVDD pins. Use a solid ground plane under the ADC and minimize ground loops. Keep analog input traces short and away from digital switching signals. Use star grounding with a single connection point between analog and digital grounds near the ADC.
Follow evaluation board layout; use solid ground plane; keep analog traces short.