The TH7122ENETR-ND is a high-performance, single-chip FSK/ASK transmitter manufactured by Melexis Technologies NV. It is designed for a wide range of wireless applications in the ISM (Industrial, Scientific, and Medical) frequency bands. This transmitter integrates a Phase-Locked Loop (PLL) and a power amplifier to deliver robust and reliable RF performance while maintaining low power consumption. The device supports both Frequency Shift Keying (FSK) and Amplitude Shift Keying (ASK) modulation schemes, making it versatile for different communication protocols.

Applications:

• Remote Keyless Entry (RKE) systems
• Tire Pressure Monitoring Systems (TPMS)
• Wireless sensor networks
• Alarm systems
• Home automation
• Garage door openers
• Low-power telemetry

Features:

• Single-chip FSK/ASK transmitter
• Frequency range: 300 MHz to 950 MHz
• Adjustable output power up to +10 dBm
• Low current consumption
• FSK and ASK modulation support
• Fast PLL settling time
• On-chip crystal oscillator
• Small package size

Benefits:

• Extended range: High output power enables reliable communication over a greater distance.
• Low power consumption: Minimizes battery drain, extending the operational life of battery-powered devices.
• Flexibility: Supports both FSK and ASK modulation, offering adaptability to various communication standards.
• Integration: Single-chip design reduces component count and simplifies system design, lowering BOM costs.
• Reliability: Robust RF performance ensures stable and dependable wireless links.

The TH7122ENETR-ND is typically used with a microcontroller to control the modulation and data transmission. It features an on-chip crystal oscillator which reduces the need for external components and offers precise frequency control. The adjustable output power allows designers to optimize the trade-off between range and power consumption for specific applications. The device is available in a small surface-mount package, which is suitable for compact designs.

Technical Specifications:

• Frequency Range: 300 - 950 MHz
• Modulation: FSK, ASK
• Output Power: Up to +10 dBm
• Supply Voltage: 2.1 V to 3.6 V
• Operating Temperature: -40°C to +85°C