Overview
The ADF7021-NBCPZ is a high-performance narrow-band transceiver IC produced by Analog Devices Inc. It is designed to operate in both narrow-band, license-free ISM bands and licensed bands, covering frequency ranges of 80 MHz to 650 MHz and 842 MHz to 916 MHz. This transceiver is particularly suited for worldwide narrowband standards, including those that stipulate 12.5 kHz channel separation. It offers a range of on-chip FSK modulation and data filtering options, including Gaussian and raised cosine filtering, to meet tight spectral efficiency requirements. The device is ideal for applications requiring flexibility in modulation schemes and compliance with various regulatory standards such as ETSI EN 300 220, ARIB STD-T67, and FCC Part 15, Part 90, and Part 95.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Frequency Range | 80 MHz to 650 MHz, 842 MHz to 916 MHz | Dual VCO operation | |||
| Modulation Schemes | 2FSK, 3FSK, 4FSK, MSK | ||||
| Data Rates | 0.05 kbps | 24 kbps | |||
| Power Supply | 2.3 V | 3.6 V | V | ||
| Output Power | -16 dBm | +13 dBm | dBm | Programmable in 63 steps | |
| Receiver Sensitivity | -130 dBm | dBm | At 100 bps, 2FSK | ||
| Image Rejection | 56 dB | dB | Using IR calibration scheme | ||
| Temperature Range | -40°C | +85°C | °C | ||
| Package Type | 48-Lead Lead Frame Chip Scale Package (LFCSP) |
Key Features
- On-chip FSK modulation and data filtering options (Gaussian and raised cosine filtering)
- Dual VCO design for dual-band operation (80 MHz to 650 MHz and 842 MHz to 916 MHz)
- Automatic power amplifier (PA) ramp control and fully automatic frequency control loop (AFC)
- On-chip image rejection calibration and VCO with fractional-N PLL
- Digital received signal strength indication (RSSI) and integrated Tx/Rx switch
- Programmable IF filter bandwidths (9 kHz, 13.5 kHz, and 18.5 kHz)
- Low power consumption with 0.1µA leakage current in power-down mode
- On-chip 7-bit ADC and temperature sensor
Applications
- Narrow-band, short-range device (SRD) standards
- Wireless data transfer and remote control/security systems
- Wireless metering and medical telemetry service (WMTS)
- Home automation, process, and building control
- Pagers and other low-cost wireless applications
Q & A
- What are the frequency ranges supported by the ADF7021-NBCPZ?
The ADF7021-NBCPZ supports frequency ranges of 80 MHz to 650 MHz and 842 MHz to 916 MHz.
- What modulation schemes are supported by the ADF7021-NBCPZ?
The device supports 2FSK, 3FSK, 4FSK, and MSK modulation schemes.
- What is the power supply range for the ADF7021-NBCPZ?
The power supply range is from 2.3 V to 3.6 V.
- What is the maximum transmit power of the ADF7021-NBCPZ?
The maximum transmit power is +13 dBm, programmable in 63 steps.
- How does the ADF7021-NBCPZ achieve image rejection?
The device achieves an image rejection performance of 56 dB using a patent-pending IR calibration scheme that does not require an external RF source.
- What is the temperature range for the ADF7021-NBCPZ?
The operating temperature range is from -40°C to +85°C.
- What type of package does the ADF7021-NBCPZ come in?
The device is packaged in a 48-Lead Lead Frame Chip Scale Package (LFCSP).
- What are some of the key applications for the ADF7021-NBCPZ?
Key applications include narrow-band SRD standards, wireless data transfer, remote control/security systems, wireless metering, and medical telemetry service (WMTS).
- Does the ADF7021-NBCPZ support frequency-hopping spread spectrum (FHSS) systems?
Yes, the device supports FHSS systems due to its frequency-agile PLL.
- What is the receiver sensitivity of the ADF7021-NBCPZ?
The receiver sensitivity is -130 dBm at 100 bps, 2FSK.
