Overview
The QN9021/D, produced by NXP USA Inc., is an ultra-low power Bluetooth Low Energy (BLE) System-on-Chip (SoC) solution. This chip integrates a Bluetooth LE v4.2 compliant radio, link controller, and host stack, making it a comprehensive single-chip solution for Bluetooth Smart applications. It is particularly suited for wearable electronics, sports and fitness devices, human interface devices, and app-enabled smart accessories. The QN9021/D is designed to operate on small capacity batteries, such as coin cell batteries, due to its very low power consumption.
Key Specifications
| Parameter | Value |
|---|---|
| Frequency Bands | 2400 MHz to 2483.5 MHz |
| Modulation Format | GFSK |
| Data Rate | 1 Mbit/s on air |
| TX Output Power | -20 dBm to +4 dBm |
| RX Sensitivity | -95 dBm (non-DC-to-DC mode), -93 dBm (DC-to-DC mode) |
| Power Supply | 2.4 V to 3.6 V |
| Package | 32-VFQFN Exposed Pad (5x5 mm) |
| Operating Temperature | -40°C to 85°C |
| Current - Receiving | 9.2 mA (with DC-to-DC converter) |
| Current - Transmitting | 8.8 mA @ 0 dBm TX power (with DC-to-DC converter) |
| MCU | 32-bit ARM Cortex-M0 |
| System Memory | 64 kB |
| ROM | 96 kB |
| Flash Memory | 128 kB |
| GPIO Pins | 31 |
| Serial Interfaces | I²C, SPI, UART |
Key Features
- Ultra-low power consumption with 2 μA deep sleep mode and 3 μA sleep mode (32 kHz RC oscillator on)
- Integrated DC-to-DC converter and LDO for efficient power management
- Supports both master and slave modes with up to eight simultaneous links in master mode
- Secure connections supported
- Excellent link budget up to 99 dB
- Integrated 32-bit ARM Cortex-M0 MCU with 64 kB system memory, 96 kB ROM, and 128 kB on-chip flash memory
- Four-channel, 10-bit general-purpose ADC and two general-purpose analog comparators
- Multiple digital serial interfaces (SPI/UART/I²C) for communication with application processors or digital sensors
- Battery monitor, low-power sleep timer, and watchdog timer
- Real-time clock with calibration and 2-channel programmable PWM
Applications
- Wearable electronics
- Sports and fitness devices
- Human interface devices
- App-enabled smart accessories
- Bluetooth Smart applications
Q & A
- What is the QN9021/D used for?
The QN9021/D is used for Bluetooth Low Energy (BLE) applications, particularly in wearable electronics, sports and fitness devices, human interface devices, and app-enabled smart accessories.
- What are the supported frequency bands for the QN9021/D?
The QN9021/D supports frequency bands from 2400 MHz to 2483.5 MHz.
- What is the modulation format used by the QN9021/D?
The QN9021/D uses GFSK (Gaussian Frequency Shift Keying) modulation format.
- What is the maximum data rate of the QN9021/D?
The maximum data rate is 1 Mbit/s on air.
- What is the power supply range for the QN9021/D?
The power supply range is from 2.4 V to 3.6 V.
- How many GPIO pins does the QN9021/D have?
The QN9021/D has 31 GPIO pins.
- What serial interfaces are supported by the QN9021/D?
The QN9021/D supports I²C, SPI, and UART interfaces.
- What is the current consumption during receiving and transmitting modes?
The current consumption is approximately 9.2 mA during receiving and 8.8 mA @ 0 dBm TX power during transmitting, both with the DC-to-DC converter enabled.
- Does the QN9021/D support secure connections?
- What is the operating temperature range for the QN9021/D?
The operating temperature range is from -40°C to 85°C.
