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BCM88335L2CUBG 参数 Datasheet PDF下载

BCM88335L2CUBG图片预览
型号: BCM88335L2CUBG
PDF下载: 下载PDF文件 查看货源
内容描述: [Telecom Circuit, 1-Func, PBGA145, WLBGA-145]
分类和应用: 电信电信集成电路
文件页数/大小: 140 页 / 2728 K
品牌: CYPRESS [ CYPRESS ]
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BCM88335 Data Sheet  
Bluetooth Radio  
Power Amplifier  
The fully integrated PA supports Class 1 or Class 2 output using a highly linearized, temperature-compensated  
design. This provides greater flexibility in front-end matching and filtering. Due to the linear nature of the PA  
combined with some integrated filtering, external filtering is required to meet the Bluetooth and regulatory  
harmonic and spurious requirements. For integrated telematics applications in which Bluetooth is integrated  
next to the cellular radio, external filtering can be applied to achieve near-thermal-noise levels for spurious and  
radiated noise emissions. The transmitter features a sophisticated on-chip transmit signal strength indicator  
(TSSI) block to keep the absolute output power variation within a tight range across process, voltage, and  
temperature.  
Receiver  
The receiver path uses a low-IF scheme to downconvert the received signal for demodulation in the digital  
demodulator and bit synchronizer. The receiver path provides a high degree of linearity, an extended dynamic  
range, and high-order on-chip channel filtering to ensure reliable operation in the noisy 2.4 GHz ISM band. The  
front-end topology, with built-in out-of-band attenuation, enables the BCM88335 to be used in most applications  
with minimal off-chip filtering. For integrated telematics operation, in which the Bluetooth function is integrated  
close to the cellular transmitter, external filtering is required to eliminate the desensitization of the receiver by  
the cellular transmit signal.  
Digital Demodulator and Bit Synchronizer  
The digital demodulator and bit synchronizer take the low-IF received signal and perform an optimal frequency  
tracking and bit synchronization algorithm.  
Receiver Signal Strength Indicator  
The radio portion of the BCM88335 provides a Receiver Signal Strength Indicator (RSSI) signal to the  
baseband, so that the controller can determine whether the transmitter should increase or decrease its output  
power.  
Local Oscillator Generation  
Local Oscillator (LO) generation provides fast frequency hopping (1600 hops/second) across the 79 maximum  
available channels. The LO generation subblock employs an architecture for high immunity to LO pulling during  
PA operation. The BCM88335 uses an internal RF and IF loop filter.  
Calibration  
The BCM88335 radio transceiver features an automated calibration scheme that is fully self contained in the  
radio. No user interaction is required during normal operation or during manufacturing to provide the optimal  
performance. Calibration optimizes the performance of all the major blocks within the radio to within 2% of  
optimal conditions, including gain and phase characteristics of filters, matching between key components, and  
key gain blocks. This takes into account process variation and temperature variation. Calibration occurs during  
normal operation during the settling time of the hops and calibrates for temperature variations as the device  
cools and heats during normal operation in its environment.  
Broadcom®  
September 23, 2015 • 88335-DS100-R  
Page 33  
BROADCOM CONFIDENTIAL  
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