AN31 SILABS [Silicon Laboratories], AN31 Datasheet
AN31
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AN31 Summary of contents
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... Copyright © 2006 by Silicon Laboratories AN31 greater than 3 nH EXT printed trace discrete inductor J inductor device pad synthesizer device pad “Chip” Inductor (Equation 0.3 = external inductance = nominal value of discrete “chip” TSSOP (X ) (nH/mm) MLP TSSOP AN31 ...
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... AN31 3.2. Using a Printed Trace Inductor If the required value less than 3 nH EXT recommended that a PCB trace be used as shown in Figure 2. device pad inductor trace Figure 2. Printed Trace Inductor Table 1 lists the dimensions to be used with a micro leadframe package (MLP), and Table 2 lists the dimensions to be used with a thin shrink small outline package (TSSOP) ...
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... All the registers described in the data sheet should be re-written with normal values for proper closed-loop operation. 3. Calculate the measured center frequency for the synthesizer using Equation 7. . Note that MIN f MEAS where f = measured center frequency MEAS Rev. 1.3 AN31 . Note that MAX MIN MAX (Equation 7) ----------------------------- - = 2 3 ...
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... AN31 f = measure minimum frequency of operation MIN f = measured maximum frequency of operation MAX 4. Calculate the measured external inductance, L using Equation 8. 1 ---------------------------------------------- - – MEAS PKG 2πf MEAS NOM where L = measured external conductance MEAS f = measured center frequency MEAS C = nominal tank capacitance from NOM ...
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... During the readback, the function of the AUXOUT pin is to provide the serial data output from the device. Writing to any of the registers described in the data sheet will cause the function of AUXOUT to revert to its previously programmed function. This is illustrated in Figure 4 below. Refer to Table 3 for timing values. Rev. 1.3 AN31 5 ...
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... AN31 80% 50% 20% t SCLK SENB SDA UXOUT programmed f unc tion OD17 OD16 Parameter Read Operation SCLK to SEN Hold Time Read Operation SEN to SCLK Setup Time SCLK to AUXOUT SEN to AUXOUT 9. Summary Silicon Laboratories’ frequency synthesizers have been designed to provide robust operation over extreme conditions ...
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... N : OTES Rev. 1.3 AN31 7 ...
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... AN31 C I ONTACT NFORMATION Silicon Laboratories Inc. 4635 Boston Lane Austin, TX 78735 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Email: RFinfo@silabs.com Internet: www.silabs.com The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. ...