Features and Benefits
- Single-chip, Low-power UHK Transmitter
- 369.5 MHz to 395.9 MHz Frequency Operation using Fractional-N PLL and Fully-integrated VCO
- 3.0 V Supply Voltage
- Data Rates Supported < 20 kbps
- Low Current Consumption 26mA at 12dBm Output at 384 MHz
- Power-down Mode (<1µA)
- 24-Lead TSSOP Package
The ADF7901 is a low power OOK/FSK UHF transmitter designed for use in RF remote control devices. The device is capable of Frequency Shift Keying (FSK) modulation on eight different channels, selectable by three external control lines. OOK modulation is performed by modulating the PA control line.
The on-chip VCO operates at 2x the output frequency. The divide by 2 at the output of the VCO reduces the amount of PA feedthrough. As a result of this, OOK modulation depths of greater than 50dB are easily achievable.
The FSK_ADJ and ASK_ADJ resistors can be adjusted in the system to optimize output power for each modulation scheme. An additional 1.5dB of output power is provided for the lower bank of channels to adjust for antenna performance.
The CE line allows the transmitter to be powered down completely. In this mode the leakage current is typically 0.1µA.
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Tools & Simulations
Analog Devices ADIsimSRD Design Studio is a very powerful tool allowing real-time simulation and optimization of many of the parameters in a typical wireless system using the ADF7xxx family of transceivers and transmitters.
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Technical Articles (6)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.