●The LMX5251 is a high performance, monolithic, radio transceiver optimized for Bluetooth™ communications systems. When used in conjunction with a Bluetooth baseband controller, a complete Bluetooth node with a Host Control Interface (HCI) can be implemented.
●The LMX5251 radio architecture allows for minimal external components. The highly integrated design includes the Low Noise Amplifier (LNA), mixer, on-chip filters, 2.5 GHz delta-sigma phase-lock loop (ΔΣ PLL), voltage controlled oscillator, modem functions, and dual power supply regulators. Digital modulation and demodulation techniques are utilized for a robust manufacturable design. Power management includes control over individual chip functions and internal voltage regulation for optimum performance.
●The LMX5251 modem circuitry provides the data communication link to the Bluetooth baseband controller. The interface is flexible and works with solutions that require a standalone Bluetooth radio. The LMX5251 can be placed in Sleep mode (reducing system current consumption) and is optimized for low power operation. It operates from a single 2.85V to 3.6V power supply.
●The LMX5251 is manufactured using a CMOS process and is available in a 48-pin WQFN (Thin Quad Flatpack, No lead) package. Die processing is also available through Texas Instruments Die Products Group.
●The LMX5251 is the most recent revision of the LMX5250 and is completely interoperable with the LMX5100 Bluetooth Baseband Controller.
● Bluetooth Version 1.1 Qualified
● Flexible Radio Frequency (RF) to Baseband (BB) Interface
●LOW POWER
● Low Current Consumption
● Power Management Control Functions
●HIGH PERFORMANCE
● < 82 dBm Sensitivity
● Class 2/3 Operation
● ± 1/12 Bit Sampling Resolution
● Closed Loop ΔΣ Modulation
●HIGH INTEGRATION
● Low IF (Intermediate Frequency) Architecture with
●Digital Demodulation
● Integrated Radio Frequency Voltage Controlled Oscillator
●(RFVCO)
● Dual on-chip Voltage Regulators:)Input Voltages
●2.85V–3.6VOutput Nominally 2.5V
● 48-pin WQFN (Thin Quad Flatpack No lead) Package
● No Pb Leadframe – LMX5251SQ NOPB
