 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
EVAL-ADF4113EBZ1 Datasheet(PDF) 25 Page - Analog Devices |
|
||||||||||||||||||||||||||||||
EVAL-ADF4113EBZ1 Datasheet(HTML) 25 Page - Analog Devices |
|
|
25 / 28 page  Data Sheet ADF4110/ADF4111/ADF4112/ADF4113 Rev. F | Page 25 of 28 DIRECT CONVERSION MODULATOR In some applications, a direct conversion architecture can be used in base station transmitters. Figure 37 shows the combina- tion available from ADI to implement this solution. The circuit diagram shows the AD9761 being used with the AD8346. The use of dual integrated DACs such as the AD9761 with specified ±0.02 dB and ±0.004 dB gain and offset matching characteristics ensures minimum error contribution (over temperature) from this portion of the signal chain. The local oscillator (LO) is implemented using the ADF4113. In this case, the OSC 3B1-13M0 provides the stable 13 MHz reference frequency. The system is designed for a 200 kHz channel spacing and an output center frequency of 1960 MHz. The target application is a WCDMA base station transmitter. Typical phase noise performance from this LO is −85 dBc/Hz at a 1 kHz offset. The LO port of the AD8346 is driven in single-ended fashion. LOIN is ac-coupled to ground with the 100 pF capacitor; LOIP is driven through the ac coupling capacitor from a 50 Ω source. An LO drive level of between −6 dBm and −12 dBm is required. The circuit of Figure 37 gives a typical level of −8 dBm. The RF output is designed to drive a 50 Ω load but must be ac- coupled as shown in Figure 37. If the I and Q inputs are driven in quadrature by 2 V p-p signals, the resulting output power is around −10 dBm. RSET ADF4113 18 Ω 100pF 18 Ω REFIN 100pF RFINA RFINB CP SERIAL DIGITAL INTERFACE TCXO OSC 3B1-13M0 100pF 620pF 3.9k Ω 3.3k Ω 9.1nF 4.7k Ω 18 Ω 100pF RFOUT POWER SUPPLY CONNECTIONS AND DECOUPLING CAPACITORS ARE OMITTED FROM DIAGRAM TO INCREASE CLARITY. AD9761 TxDAC REFIO FS ADJ MODULATED DIGITAL DATA QOUTB IOUTA IOUTB QOUTA AD8346 LOIN LOIP VOUT 100pF 100pF 2k Ω 51 Ω 910pF VCO190-1960T IBBP IBBN QBBP QBBN LOW-PASS FILTER LOW-PASS FILTER Figure 37. Direct Conversion Transmitter Solution |
Similar Part No. - EVAL-ADF4113EBZ1 |
|
Similar Description - EVAL-ADF4113EBZ1 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
