LR1121
The component under discussion is designed for advanced electronic systems, targeting applications that require reliable connectivity and precise data acquisition. Engineered by SEMTECH, a leader in high-performance analog and mixed-signal semiconductors and advanced algorithms, this module showcases its prowess in the realm of wireless technology. It incorporates the LR112x series chips, specifically mentioning the LR1120 and LR1121, which are notable for their low power consumption and robustness in communication capabilities. These chips cater to a variety of frequency bands, with explicit mentions of R915 and R868, indicating their suitability for a broad range of geographical regions and regulatory requirements. This module is particularly designed with an eye towards innovation in the domain of Internet of Things (IoT) applications, offering features that ensure seamless integration into existing technology with an emphasis on ease of deployment and operational efficiency. Key features highlighted include multiple onboard antennae options such as ANT_GNSS and ANT_WIFI, ensuring comprehensive connectivity solutions for different environmental and application requirements. Also notable is the mention of a VOD_RADIO and the inclusion of interfaces like SPI and BUSY signaling, underscoring the component's flexibility in system integration and communication protocol support. Furthermore, SEMTECH references specific considerations for design and regulatory compliance, indicating the component's targeted use in professional grade equipment and scenarios. The datasheet also hints at an evaluation-focused approach, with designations like "For evaluation only" and remarks on FCC approval status, suggesting that this component is positioned for development and testing in cutting-edge wireless applications. This focus on flexibility, regulatory compliance, and advanced connectivity options positions SEMTECH's component as a crucial asset for designers and engineers looking to innovate in the IoT and wireless communication sectors.... show more24 Comments
Bidirectional DC-DC Energy Storage Manager
Bidirectional DC-DC converter management system PCB for energy storage applications. The design targets bidirectional charge and discharge control, dynamic power regulation, energy optimization, and overload protection for storage systems. It integrates a control section with MCU-class supervision, 16-bit ADC measurement, PWM-based power-stage control, and industrial CAN/RS485 communication, while planning practical PCB partitioning for high-current power paths, mixed-signal control, and protected interfaces. Target conversion efficiency is 98% or higher, with CMOS-oriented high-integration design intent adapted into a manufacturable mixed-signal PCB implementation.... show morePortable Potentiostat
Portable potentiostat PCB with low-noise analog front end, dual 3.3 V rails, and 4-layer mixed-signal layout for heavy-metal voltammetry.... show moreHybrid EEG BCI for Pluto X v1.1
Hybrid EEG BCI for Pluto X v1.1 using ESP32-WROOM-32 and ADS1299-6PAG with LiPo charging, 5V boost, -5V analog rail, split 3.3V analog/digital regulators, six EEG channels, RC electrode protection, and 80x60mm mixed-signal PCB constraints.... show moreFlowState Headband EVT1
FlowState Headband EVT1 — 4-Channel EEG Calibration Device Closed-loop EEG neurofeedback headband for theta/beta baseline calibration. 4-layer mixed-signal PCB, 40x30mm. Core ICs: - ADS1299-4PAG (TI) — 4-channel 24-bit EEG analog front end, SPI interface, 250 SPS - nRF5340 (Nordic) — Dual-core BLE 5.3 SoC, 128 MHz app core + 64 MHz network core Key requirements: - Separate analog and digital power domains (dual LDO: LP5907 for AVDD, AP2112 for DVDD) - Split analog/digital ground planes with single-point connection - 6 electrode inputs (4 active + 1 reference + 1 DRL) with individual TVS ESD protection on each - LIS2DH12 accelerometer (I2C) for motion artifact detection - MCP73831 USB-C battery charging (300-500 mAh LiPo) - 2.4 GHz chip antenna or PCB trace antenna at board edge with 10mm keepout - Conformal coating for sweat/moisture protection Reference designs: - Analog front-end: TI ADS1299 EVM (SBAS499) - Digital/BLE: Nordic nRF5340 DK reference schematic Critical constraint: Microvolt-level EEG signals — analog input routing and power supply filtering are the highest-priority layout concerns.... show more