The VCO operates at twice the fundamental frequency to reduce spurious emissions and frequency pulling problems. The transmitter output power is programmable in 63 steps from −20 dBm to +13 dBm. The UHF transceiver module RF frequency, channel spacing, and modulation are programmable using a simple 3-wire interface. The RF transceiver module operates with a power supply range of 2.3 V to 3.6V and can be powered down when not in use. A low IF architecture is used in the receiver (200 kHz), minimizing power consumption and the external component count and avoiding interference problems at low frequencies. 
The RDM-A4FZ supports a wide variety of programmable features, including Rx linearity, sensitivity, and IF bandwidth, allowing the user to trade off receiver sensitivity and selectivity for current consumption, depending on the application. The receiver also features automatic frequency control (AFC) loop, allowing the PLL to compensate for frequency error in the incoming signal. An on-chip ADC provides read back of an integrated temperature sensor, an external analog input, the battery voltage, or the RSSI signal, which provides savings on an ADC in some applications. The temperature sensor is accurate to ±10°C over the full operating temperature range of −40°C to +85°C. This accuracy can be improved by doing a 1-point calibration at room temperature and storing the result in memory. Applications

• Low Cost Wireless Data Transfer
• Wireless Medical Applications
• Remote Control / Security Systems
• Wireless Sensor Networks
• Keyless Entry
• Home Automation
• Process And Building Control
• Automotive Systems
• Active RFID Solutions
• AMR – Automated Meter Reading

The VCO operates at twice the fundamental frequency to reduce spurious emissions and frequency pulling problems. The transmitter output power is programmable in 63 steps from −20 dBm to +13 dBm. The UHF transceiver module RF frequency, channel spacing, and modulation are programmable using a simple 3-wire interface. The RF transceiver module operates with a power supply range of 2.3 V to 3.6V and can be powered down when not in use. A low IF architecture is used in the receiver (200 kHz), minimizing power consumption and the external component count and avoiding interference problems at low frequencies. 
The RDM-A4FZ supports a wide variety of programmable features, including Rx linearity, sensitivity, and IF bandwidth, allowing the user to trade off receiver sensitivity and selectivity for current consumption, depending on the application. The receiver also features automatic frequency control (AFC) loop, allowing the PLL to compensate for frequency error in the incoming signal. An on-chip ADC provides read back of an integrated temperature sensor, an external analog input, the battery voltage, or the RSSI signal, which provides savings on an ADC in some applications. The temperature sensor is accurate to ±10°C over the full operating temperature range of −40°C to +85°C. This accuracy can be improved by doing a 1-point calibration at room temperature and storing the result in memory. Applications

• Low Cost Wireless Data Transfer
• Wireless Medical Applications
• Remote Control / Security Systems
• Wireless Sensor Networks
• Keyless Entry
• Home Automation
• Process And Building Control
• Automotive Systems
• Active RFID Solutions
• AMR – Automated Meter Reading