ADC Achieves True 18-bit Performance
June 9, 2015 | Linear Technology CorporationEstimated reading time: 1 minute
Linear Technology Corporation introduces the LTC2348-18, an 18-bit, 8-channel simultaneous sampling successive approximation register (SAR) ADC with industry-leading performance and flexibility. While converting eight channels at 200ksps per channel throughput, each SoftSpan input can be independently configured on a conversion-by-conversion basis to accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals. The differential analog inputs operate over a wide 34V input common mode range, allowing the ADC to directly digitize a variety of signals to simplify the signal-chain design. The input signal flexibility, combined with unrivaled ±3LSB maximum INL, no missing codes at 18 bits, and 96.7dB SNR, makes the LTC2348-18 ideal for high performance industrial process control, test and measurement, power line monitoring, instrumentation and automatic test equipment applications.
The LTC2348-18 features a precision internal reference with 20ppm/°C maximum temperature coefficient and an integrated reference buffer capable of accurate one-shot measurements, providing space savings in densely packed circuit boards. Optionally, an external 5V reference can be used to expand the analog input range to ±12.5V. The device dissipates 140mW when converting eight channels simultaneously at 200ksps per channel, and features nap and power-down modes to reduce power dissipation at slower throughputs.
In addition to its unique analog characteristics, the LTC2348-18 offers unmatched digital flexibility, featuring pin-selectable SPI CMOS and LVDS serial interfaces. The wide digital output supply range allows the device to communicate with any CMOS logic between 1.8V and 5V. In CMOS mode, applications can employ between one and eight lanes of serial output data, enabling the user to optimize bus width and data throughput. LVDS mode offers low noise, high speed communications over greater distances using differential signaling. Together, these I/O interface options allow the LTC2348-18 to communicate equally well with legacy microcontrollers and modern FPGAs.
The LTC2348-18 is the first in a family of multichannel 18-/16-bit simultaneous sampling SAR ADCs. All specifications are guaranteed over the extended -40°C to 125°C temperature range. The LTC2348-18 is available now in a 48-lead, 7mm x 7mm LQFP package, priced starting at $23.35 each in 1,000-piece quantities. Samples and demo boards may be requested at www.linear.com/product/LTC2348-18, or by contacting your local Linear Technology sales office.
Suggested Items
Epirus Receives $43.5 Million Contract from U.S. Army for IFPC-HPM Generation II Systems
07/18/2025 | PRNewswireEpirus announced a $43,551,060 contract from the U.S. Army's Rapid Capabilities and Critical Technologies Office (RCCTO).
Eaton Signs Agreement to Acquire Resilient Power Systems
07/16/2025 | BUSINESS WIREIntelligent power management company Eaton announced it has signed an agreement to acquire Resilient Power Systems Inc., a leading North American developer and manufacturer of innovative energy solutions, including solid-state transformer-based technology.
Beyond Design: Refining Design Constraints
07/17/2025 | Barry Olney -- Column: Beyond DesignBefore starting any project, it is crucial to develop a thorough plan that encompasses all essential requirements. This ensures that the final product not only aligns with the design concept but is also manufacturable, reliable, and meets performance expectations. High-speed PCB design requires us to not only push technological boundaries but also consider various factors related to higher frequencies, faster transition times, and increased bandwidths during the design process.
Copper Price Surge Raises Alarms for Electronics
07/15/2025 | Global Electronics Association Advocacy and Government Relations TeamThe copper market is experiencing major turbulence in the wake of U.S. President Donald Trump’s announcement of a 50% tariff on imported copper effective Aug. 1. Recent news reports, including from the New York Times, sent U.S. copper futures soaring to record highs, climbing nearly 13% in a single day as manufacturers braced for supply shocks and surging costs.
Global Citizenship: The Global Push for Digital Inclusion
07/16/2025 | Tom Yang -- Column: Global CitizenshipIt can be too easy to take the technology at our fingertips for granted: high-speed internet, cloud-based collaboration, and instant video calls across continents. Yet, for billions of people, access to these digital tools is a distant dream. As a global community, we must ensure that technology is available to all. Here is how technology is bridging physical, economic, and educational gaps in underserved regions and profoundly reshaping lives.