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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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