CC2541：2.4GHz蓝牙低功耗芯片详情与特性
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更新于2024-07-09
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CC2541数据表是一份详细介绍了TI公司生产的一款2.4GHz蓝牙低功耗模块的产品手册。这份文档涵盖了CC2541芯片的关键特性，使其在蓝牙通信领域表现出色。以下是一些主要知识点：
1. 频谱兼容性：CC2541符合蓝牙4.0低功耗规范，工作在2.4GHz ISM频段，支持蓝牙私有协议，确保了在全球范围内的无线通信兼容性。
2. 射频性能：它拥有强大的射频能力，可以实现2.4GHz下的高速数据传输，支持多种速率，如250kbps、500kbps、1Mbps、2Mbps，满足不同的应用需求。
3. 集成控制器：内置高性能8051微控制器，具备高级功能，如数据预取，确保高效运行，并支持低功耗模式，延长电池寿命。
4. 存储容量：CC2541提供可编程闪存，最大容量可达256KB，支持内部编程，减少了对外部存储的需求，便于远程操作和维护。
5. 链路预算与范围：在8-KB RAM模式下，该模块能够在长距离通信中保持稳定的性能，且支持自动链路管理和地址解析，确保可靠的数据交换。
6. 调试支持：它具备硬件调试功能，可实现高达0dBm的可编程输出功率，以及扩展的基带处理能力，包括自动确认和地址解码。
7. 外设接口：CC2541设计有强大的外设接口，支持世界范围内广泛使用的无线频率调谐系统，如ETSI EN300328和EN300440标准，以及通用定时器功能。
8. DMA支持：提供了5个直接内存访问通道，显著提高了数据传输的效率，特别是在需要大量数据交换的应用场景中。
CC2541数据表详细阐述了这款蓝牙模块的强大功能和适用范围，对于开发基于蓝牙技术的物联网设备或无线通信系统来说，是不可或缺的技术参考资源。
CC2541
ZHCS708D –JANUARY 2012–REVISED JUNE 2013
www.ti.com.cn
RF RECEIVE SECTION (continued)
Measured on Texas Instruments CC2541 EM reference design with T
A
= 25°C, VDD = 3 V, f
c
= 2440 MHz
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
1 Mbps, GFSK, 250-kHz Deviation, Bluetooth low energy Mode, 0.1% BER
High-gain mode –94
Receiver sensitivity
(3)(4)
dBm
Standard mode –88
Saturation
(4)
BER < 0.1% 5 dBm
Co-channel rejection
(4)
Wanted signal –67 dBm –6 dB
±1 MHz offset, 0.1% BER, wanted signal –67 dBm –2
±2 MHz offset, 0.1% BER, wanted signal –67 dBm 26
In-band blocking rejection
(4)
dB
±3 MHz offset, 0.1% BER, wanted signal –67 dBm 34
>6 MHz offset, 0.1% BER, wanted signal –67 dBm 33
Minimum interferer level < 2 GHz (Wanted signal –67 dBm) –21
Out-of-band blocking
Minimum interferer level [2 GHz, 3 GHz] (Wanted signal –67 dBm) –25 dBm
rejection
(4)
Minimum interferer level > 3 GHz (Wanted signal –67 dBm) –7
Intermodulation
(4)
Minimum interferer level –36 dBm
Including both initial tolerance and drift. Sensitivity better than -67dBm,
Frequency error tolerance
(5)
–250 250 kHz
250 byte payload. BER 0.1%
Symbol rate error Maximum packet length. Sensitivity better than –67 dBm, 250 byte
–80 80 ppm
tolerance
(6)
payload. BER 0.1%
1 Mbps, GFSK, 160-kHz Deviation, 0.1% BER
Receiver sensitivity
(7)
–91 dBm
Saturation BER < 0.1% 0 dBm
Co-channel rejection Wanted signal 10 dB above sensitivity level –9 dB
±1-MHz offset, 0.1% BER, wanted signal –67 dBm 2
±2-MHz offset, 0.1% BER, wanted signal –67 dBm 24
In-band blocking rejection dB
±3-MHz offset, 0.1% BER, wanted signal -–67 dBm 27
>6-MHz offset, 0.1% BER, wanted signal –67 dBm 32
Including both initial tolerance and drift. Sensitivity better than –67 dBm,
Frequency error tolerance
(5)
–200 200 kHz
250-byte payload. BER 0.1%
Symbol rate error Maximum packet length. Sensitivity better than –67 dBm, 250-byte
–80 80 ppm
tolerance
(6)
payload. BER 0.1%
500 kbps, MSK, 0.1% BER
Receiver sensitivity
(7)
–99 dBm
Saturation BER < 0.1% 0 dBm
Co-channel rejection Wanted signal –67 dBm –5 dB
±1-MHz offset, 0.1% BER, wanted signal –67 dBm 20
In-band blocking rejection ±2-MHz offset, 0.1% BER, wanted signal –67 dBm 27 dB
>2-MHz offset, 0.1% BER, wanted signal –67 dBm 28
Including both initial tolerance and drift. Sensitivity better than –67 dBm,
Frequency error tolerance –150 150 kHz
250-byte payload. BER 0.1%
Maximum packet length. Sensitivity better than –67 dBm, 250-byte
Symbol rate error tolerance –80 80 ppm
payload. BER 0.1%
(3) The receiver sensitivity setting is programmable using a TI BLE stack vendor-specific API command. The default value is standard
mode.
(4) Results based on standard-gain mode.
(5) Difference between center frequency of the received RF signal and local oscillator frequency
(6) Difference between incoming symbol rate and the internally generated symbol rate
(7) Results based on high-gain mode.
6 Copyright © 2012–2013, Texas Instruments Incorporated
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