 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AD8341 Datasheet(PDF) 15 Page - Analog Devices |
|
|
|||||||||||||||||||||||||||||
AD8341 Datasheet(HTML) 15 Page - Analog Devices |
|
|
15 / 20 page  Data Sheet AD8341 Rev. B | Page 15 of 20 1RM 1AVG A SPAN 10MHz 1MHz/ CENTER 1.96Hz –20 –12 –40 –50 –60 –70 –80 –90 –100 –112 MARKER 1 [T1 ] –18.47dBm 1.95999900GHz 1 RBW 30kHz VBW 100kHz SWT 500ms RF ATT 0dB UNIT dBm REF LVL –12dBm –30 0.3dB OFFSET 1 [T1] –18.47dBm 1.95999900GHz CH PWR –4.06dBm ACP UP –77.64dBm ACP LOW –76.66dBm C11 C11 C0 C0 CU1 CU1 Figure 35. Output Spectrum, 1960 MHz, Single-Carrier CDMA2000 Test Model at −4 dBm, VBBI = VBBQ = 0.353 V, Adjacent Channel Power Measured at ±2.25 MHz Carrier Offset in 1 MHz BW Input Signal Filtered Using a Cavity Tuned Filter (Pass Band = 6.8 MHz) Holding the differential I and Q control voltages steady at 0.353 V, input power was swept. Figure 36 shows variation in spurious content, again measured at ±2.25 MHz carrier offset in a 1 MHz bandwidth, as defined by the 3GPP2 specification. –70 –90 –88 –86 –84 –82 –80 –78 –76 –74 –72 –20 –18 –16 –14 –12 –10 –8 –6 –4 –2 0 OUTPUT POWER (dBm) Figure 36. Adjacent Channel Power vs. Output Power, CDMA2000 Single Carrier at 1960 MHz; ACP Measured at ±2.25 MHz Carrier Offset (1 MHz BW); VBBI = VBBQ = 0.353 V With a fixed input power of 2.4 dBm, the output power was again swept by exercising the I and Q inputs. VBBI and VBBQ were kept equal and were swept from 100 mV to 500 mV. The resulting output power and ACP are shown in Figure 37. 0 –30 –25 –20 –15 –10 –5 0 0.1 0.2 0.3 0.4 0.5 IQ CONTROL VOLTAGE –60 –65 –70 –75 –80 –85 –90 Figure 37. Output Power and ACP vs. I and Q Control Voltages, CDMA2000 Test Model, VBBI = VBBQ, ACP Measured at ±2.25 MHz Carrier Offset in 1 MHz BW Figure 37 shows that for a fixed input power, the ACP (measured in dBm) tracks the output power as the gain is changed. WCDMA APPLICATION Figure 38 shows a plot of the output spectrum of the AD8341 transmitting a single-carrier WCDMA signal (Test Model 1-64 at 2140 MHz). The carrier power is approximately −9 dBm. The differential I and Q control voltages are both equal to 0.353 V, that is, the vector is sitting on the unit circle at 45°. At this power level, an adjacent channel power ratio of −61 dBc is achieved. The alternate channel power ratio of −72 dBc is dominated by the noise floor of the AD8341. 1RM SPAN 25MHz 2.5MHz/ CENTER 2.14GHz –30 –24 –50 –60 –70 –80 –90 –100 –110 –120 –124 OFFSET 1dB –40 A MARKER 1 [T1 ] –28.39dBm 2.14050000GHz RBW 30kHz VBW 300kHz SWT 1s RF ATT 0dB UNIT dBm REF LVL –24dBm 1 [T1] –28.39dBm 2.14050000GHz CH PWR –8.95dBm ACP UP –60.78dB ACP LOW –60.82dB ALT1 UP –72.67dB ALT1 LOW –72.66dB 1 C12 C12 C11 C11 C0 C0 CU1 CU1 CU2 Figure 38. AD8341 Single-Carrier WCDMA Spectrum at 2140 MHz |
|
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | 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
