Overview
The ADF7021BCPZ-RL is a highly integrated, low-power RF transceiver IC designed by Analog Devices Inc. for wireless connectivity applications in the narrow-band, license-free ISM bands and licensed frequency bands. This device is particularly suited for applications requiring high spectral efficiency and compliance with various regulatory standards such as European ETSI EN 300 220, Japanese ARIB STD-T67, Chinese short range device regulations, and North American FCC Part 15, Part 90, and Part 95.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Temperature | -40°C | +85°C | |||
| Power Supply Range | 2.3 V | 3.6 V | |||
| Data Rate (2FSK, 3FSK) | 0.05 kbps | 251 kbps | IF_BW = 25 kHz | ||
| Data Rate (4FSK) | 0.05 kbps | 32.82 kbps | IF_BW = 25 kHz | ||
| Frequency Deviation (fDEV) | 0.056 kHz | 156 kHz | PFD = 3.625 MHz to 20 MHz | ||
| Transmit Power | -16 dBm | +13 dBm | VDD = 3.0 V, TA = 25°C | ||
| IF Filter Bandwidth | 12.5 kHz | 25 kHz | Programmable |
Key Features
- Dual voltage-controlled oscillators (VCOs) with internal and external inductor options, allowing dual-band operation and frequency hopping spread spectrum (FHSS) capabilities.
- Support for 2FSK, 3FSK, and 4FSK modulation schemes with programmable frequency deviation and data filtering options (Gaussian and raised cosine filters).
- Low IF architecture with programmable IF bandwidths to minimize power consumption and external component count.
- Automatic frequency control (AFC) loop with programmable pull-in range and image rejection performance of 56 dB using a patent-pending IR calibration scheme.
- On-chip ADC for temperature sensor, external analog input, battery voltage, and RSSI signal readback.
- Programmable transmitter output power in 63 steps and automatic power ramp control to prevent spectral splatter.
- Simple 3-wire interface for RF frequency and modulation programming.
Applications
The ADF7021BCPZ-RL is suitable for a variety of wireless connectivity applications, including:
- Narrow-band, license-free ISM bands.
- Licensed frequency bands.
- Wireless sensor networks.
- Industrial control systems.
- Remote meter reading and smart grid applications.
- Medical devices and health monitoring systems.
Q & A
- What is the operating temperature range of the ADF7021BCPZ-RL?
The operating temperature range is from -40°C to +85°C. - What are the supported modulation schemes for the ADF7021BCPZ-RL?
The device supports 2FSK, 3FSK, and 4FSK modulation schemes. - What is the power supply range for the ADF7021BCPZ-RL?
The power supply range is from 2.3 V to 3.6 V. - How many steps can the transmitter output power be programmed in?
The transmitter output power can be programmed in 63 steps. - What is the maximum transmit power of the ADF7021BCPZ-RL?
The maximum transmit power is +13 dBm at VDD = 3.0 V and TA = 25°C. - Does the ADF7021BCPZ-RL support frequency hopping spread spectrum (FHSS) systems?
Yes, it supports FHSS systems due to its frequency agile PLL. - What is the image rejection performance of the ADF7021BCPZ-RL?
The image rejection performance is 56 dB using a patent-pending IR calibration scheme. - Can the ADF7021BCPZ-RL be powered down when not in use?
Yes, the device can be powered down when not in use. - What types of filters are available for transmit data filtering?
The device offers Gaussian and raised cosine transmit data filtering options. - How does the ADF7021BCPZ-RL minimize power consumption and external component count?
It uses a low IF architecture with programmable IF bandwidths.
