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    • CC1xxx /CC25xx/CC430/CC85xx se

    For customers designing Texas Instruments
    CC1xxx, CC25xx, CC430, CC85xx series series Low Power RF applications

    The following provides a basic explanation of design considerations for the external oscillation circuit using quartz crystal for 'Low Power RF' technology including ZigBee,IEEE802.15.4 and sub 1 GHz band wireless applications. "Please refer to Texas Instrument ZigBee/IEEE802.15.4 and sub 1 GHz band solution below."

    Clock solution recommendations

    In realizing low power consumption RF designs, the following factors should be taken into consideration.

    1. Oscillation start-up time

    2. Frequency tuning

    3. Lower BER(Bit Error Rate) over operating temperature

    No.

    Oscillation Circuit Factor

    2.4GHz , sub 1GHz

    sub 1GHz(narrow band)

    AT crystal unit spec.

    TCXO spec.

    1

    Quick oscillation start-up time
    - High oscillation allowance
    - Boost inverter

    Lower ESR(R1)
    High drive level

    Quick start-up time

    2

    Easy frequency control
    - inner frequency tuning capacitor

    proper frequency sensitivity
    low parameters' variation

    High frequency stability

    3

    Lower BER
    - temperature compensation

    High frequency stability

    High frequency stability

    MHz Crystal equivalent circuit

    Oscillation start-up time
    → Lower ESR (R1) , Higher C1
    → Higher drive level

    Suitable Frequency Tuning
    → Lower parameters variation(C0,C1,L1,ESR)

    Suitable Frequency Tuning
    → Proper Sensitivity (CL,C0)

    Higher Frequency Stability
    → Stable fSTA

    Texas Instruments MSP430 clock solution Here

    For CC1xxx Series, CC430 Family

    sub 1GHz band

    IC name

    StrongFirst products

    Product name

    Frequency [MHz]

    CL [pF]

    Product code

    CC1101, CC1110,
    CC1111, CC1100E

    S3225

    26

    10

    S3225-26.000M-10-10-10-A

    S2016

    26

    9

    S2016-26.000M-9-10-10-E

    CC1120,CC1200,
    CC1121
    (narrow band system)

    S2016

    32

    10

    S2016-32.000M-10-10-20-E

    S2520

    32

    10

    S2520-32.000M-10-10-20-E

    TCXO2520

    32

    -

    TCXO2520-32.000M-2-1.8V-E

    CC1125
    (narrow band system),
    CC1175

    S2016

    40

    10

    S2016-40.000M-10-10-20-E

    S2016

    32

    10

    S2016-32.000M-10-10-20-E

    S2520

    40

    10

    S2520-40.000M-10-10-20-E

    S2520

    32

    10

    S2520-32.000M-10-10-20-E

    CC430

    S3225

    26

    10

    S3225-26.000M-10-10-10-A

    S3225

    48

    16

    S3225-48.000M-16-10-10-A

    Notes:  Above recommendations are based on actual evaluation results and intended to support users in picking the right components. And the results are only according to the sample set that received from our customers, so it is not including the dispersion trend of IC and the external parts.
    As the actual board layout and choice of external components influences the best suitable crystal load capacitance, We do not assume any responsibility and grant warranty for above recommendations.
    Users design must be verified and decided by own and individual evaluation.

    For CC2xxx and CC85xx Series

    2.4 GHz band

    ZigBee IEEE802.15.4
    Proprietary
    2400MHz~2483.5MHz

    StrongFirst products

    Product name

    Frequency [MHz]

    CL [pF]

    Product code

    CC2500

    S2016

    26

    10

    S2016-26.000M-10-10-20-E

    CC2510

    S2016

    26

    9

    S2016-26.000M-9-10-20-E

    CC2511

    S3225

    40

    16

    S3225-40.000M-16-10-10-A

    CC2520

    S3225

    32

    16

    S3225-32.000M-16-10-20-E

    CC2530, CC2531

    S2520

    32

    16

    S2520-32.000M-16-10-10-E

    S2520

    32

    12

    S2520-32.000M-12-10-10-E

    S2016

    32

    12

    S2016-32.000M-12-6-30-G

    S3225

    32

    16

    S3225-32.000M-16-10-20-E

    CC2533

    S2016

    32

    12

    S2016-32.000M-12-10-10-A

    CC2538

    S2016

    32

    10

    S2016-32.000M-10-20-20-A

    CC2540
    (Bluetooth Low Energy)

    S2520

    32

    16

    S2520-32.000M-16-10-10-E

    CC2540, CC2541
    (Bluetooth Low Energy)

    S2016

    32

    10

    S2016-32.000M-10-10-20-E

    CC2541
    (Bluetooth Low Energy)

    S2520

    32

    10

    S2520-32.000M-10-10-20-E

    CC2550

    S3225

    26

    16

    S3225-26.000M-16-10-10-E

    CC256x
    (Bluetooth BR/EDR/LE)

    S2016

    26

    9

    S2016-26.000M-9-10-10-E

    S2520

    26

    9

    S2520-26.000M-9-10-18-E

    CC2570, CC2571
    (ANT RF network processor)

    S3225

    32

    10

    S3225-32.000M-10-10-20-E

    CC85xx
    (Wireless Audio Streeming)

    S3225

    48

    12

    S3225-48.000M-12-10-10-A

    S3225

    48

    16

    S3225-48.000M-16-10-10-A

    S2016

    48

    16

    S2016-48.000M-16-15-18-E

    S2016

    48

    10

    S2016-48.000M-10-10-20-E

    refer to:Crystal Selection Guide for CC253x,CC254x link to Texas Instruments site.

    Notes: Above recommendations are based on actual evaluation results and intended to support users in picking the right components. And the results are only according to the sample set that received from our customers, so it is not including the dispersion trend of IC and the external parts.
    As the actual board layout and choice of external components influences the best suitable crystal load capacitance, We do not assume any responsibility and grant warranty for above recommendations.
    Users design must be verified and decided by own and individual evaluation.
    Please refer to Texas Instruments CC2xxx manual for designing.

    *ZigBee is a registered trademark of Koninklijke Philips Electronics N.V.

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