NORA-B211

Part: NORA-B2 series — u-blox AG

Type: Stand-alone Bluetooth® Low Energy module

Description: The NORA-B2 series are stand-alone Bluetooth® Low Energy modules designed for integration into application products, supporting various data and debug interfaces.

Operating Conditions:

• Supply voltage:
• Operating temperature:

Absolute Maximum Ratings:

• Max supply voltage:
• Max continuous current:
• Max junction/storage temperature:

Key Specs:

• (No specific electrical characteristics or performance specifications are provided in the extracted text.)

Features:

• Stand-alone Bluetooth® Low Energy functionality
• Supports Universal Asynchronous Receiver/Transmitter (UART) interface
• Supports Serial Peripheral Interface (SPI)
• Supports Inter-Integrated Circuit (I2C) interface
• Supports Near Field Communication (NFC)
• Supports Pulse Width Modulation (PWM)
• Supports Quadrature Decoder (QDEC)
• Supports SWD, DAP, and SWO debug interfaces
• Open CPU software support with nRF Connect SDK

Applications:

Package:

Although the NORA-B2 series integrates a comprehensive power management system and can be powered directly from a battery, an external voltage regulator may be required to ensure a tightly controlled supply voltage. This is especially critical when interfacing with external peripherals that have strict voltage requirements for reliable operation and signal integrity.

To achieve a well-defined and stable supply voltage, power can be sourced from one of the following:

• Switching Mode Power Supply (SMPS)
• Low Dropout (LDO) Regulator

An SMPS is the preferred choice when the primary input voltage is significantly higher than the module's operating voltage. It offers superior power efficiency and minimizes current draw from the main supply-making it ideal for energy-conscious designs.

Precise voltage regulation not only optimizes the module's performance but also ensures compliance with the electrical specifications of connected peripherals, reducing the risk of communication errors or hardware instability.

• ⚠ When taking VCC supplies from an SMPS, make sure that the AC ripple voltage is kept as low as possible at the switching frequency. Design layouts should focus on minimizing the impact of any high-frequency ringing.

Use an LDO linear regulator for primary VCC supplies that have a relatively low voltage. As LDO regulators dissipate power linearly related to the step-down voltage, LDOs are not recommended for the step down of high voltages.

DC/DC efficiency should be regarded as a trade-off between the active and idle duty cycles of an application. Although some DC/DC devices achieve high efficiency at light loads, these efficiencies typically degrade as soon as the idle current drops below a few milliamps. This can have a negative impact on the life of the battery.

If decoupling capacitors are needed on the supply rails, it is best practice to position these as close as possible to the NORA-B2 series module. The power routing of some host system designs makes decoupling capacitance unnecessary.

For electrical specifications, see NORA-B2 series data sheet [2].