Advance Data Sheet December 1999
W3020 GSM Multiband RF Transceiver
Features
n n
Applications
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2.7 V operation, low power consumption Integrated receive, transmit, and synthesizer functions IF frequency and transmit offset frequency generated from the same LO Integrated dual LNAs and mixers Minimizes PCB design work between systems Surface-mount, 64-pin TQFPT package
GSM1800/1900
GSM dual-band hand portables: — GSM900/1800 — GSM900/1900 GSM single-band hand portables: — GSM900 — GSM1800 — GSM1900
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ADC IF 270 MHz
RX I
Φ
GSM900 SAW VCO 900: 1150 MHz—1230 MHz 1800: 1530 MHz—1610 MHz 1900: 1660 MHz—1730 MHz
÷2
ADC
RX Q
900: 925 MHz—960 MHz 1800: 1805 MHz—1880 MHz 1900: 1930 MHz—1990 MHz
RF MODE & AGC CONTROL LO2 PLL
540 MHz VCO
W3000 FREQUENCY SYNTHESIZER
900: 880 MHz—915 MHz 1800: 1710 MHz—1785 MHz 1900: 1850 MHz—1910 MHz GSM1800/1900
TX IF 1800/1900: 180 MHz DAC TX I
Σ
PA GSM900 Note: shaded area is off-chip. 900: 270 MHz
Φ
÷2 ÷3
SWITCHED DIVIDER
DAC
TX Q
Figure 1. W3020 Circuit Block Diagram
W3020 GSM Multiband RF Transceiver
Advance Data Sheet December 1999
Table of Contents
Contents Page Contents Page
Features................................................................. 1 Applications ........................................................... 1 Description............................................................. 4 Detailed Block Diagram ...................................... 5 Pin Information....................................................... 6 Absolute Maximum Ratings.................................... 8 ESD Precautions.................................................... 8 Operating Range.................................................... 8 Digital Serial Inputs ................................................ 9 Digital Outputs ....................................................... 9 Enable Time........................................................... 9 Supply Currents ..................................................... 9 LNA...................................................................... 10 RF Mixer .............................................................. 11 IF/Baseband Amplifier.......................................... 12 Modulator............................................................. 15 LO2 Specification................................................. 17
LO1 Input Buffer Specification.............................. 17 Programming Information..................................... 18 Serial Bus Timing Information........................... 19 The Data Word ................................................. 20 TR Register....................................................... 21 CONFIG Register.............................................. 26 MAIN Register .................................................. 30 Filter Tune and dc Offset Correction Timing...... 31 Programming Example......................................... 33 Application Information......................................... 35 S-Parameters.................................................... 35 Outline Diagram ................................................... 43 64-Pin TQFPT .................................................. 43 Manufacturing Information.................................... 44 Evaluation Board Note.......................................... 44 Ordering Information ............................................ 44
List of Figures
Figure Page Figure Page
Figure 1. W3020 Circuit Block Diagram ................. 1 Figure 2. IC Block Diagram with Pinout .................. 5 Figure 3. IF Amplifier Gain Steps ......................... 12 Figure 4. Actual Gain vs. Requested Gain............ 12 Figure 5. IF Strip Balanced Input Matching Network ................................................ 12 Figure 6. IF Filtering Requirements for Wideband Noise Performance................................ 16
Figure 7. Diagram of W3020, W3000, and SC1 Interconnection...................................... 18 Figure 8. Serial Bus Timing Diagram .................... 19 Figure 9. IF and I/Q Gain Distribution (dB)............ 25 Figure 10. Programming the LO2 Phase Detector Slope.................................................... 29 Figure 11. GSM900 Smith Chart Noise Circles ..... 35 Figure 12. GSM1800 Smith Chart Noise Circles ... 36
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Lucent Technologies Inc.
Advance Data Sheet December 1999
W3020 GSM Multiband RF Transceiver
List of Tables
Table Page Table Page
Table 1. Pin Assignment.........................................6 Table 2. GSM900 LNA Performance.....................10 Table 3. GSM1800/1900 LNA Performance ..........10 Table 4. RF Performance: GSM900......................11 Table 5. RF Performance: GSM1800/1900 ...........11 Table 6. IF/Baseband Amplifier Performance .......13 Table 7. Low-Pass Rejection Characteristics.........14 Table 8. Modulator Performance...........................15 Table 9. LO2 Performance ...................................17 Table 10. LO1 Performance..................................17 Table 11. Serial Bus Timing Information ...............19 Table 12. Register Addressing ..............................20 Table 13. TR Register...........................................21 Table 14. B: Band Select ......................................22 Table 15. MO[3:1]: Mode Control..........................23 Table 16. T6: LO2 Disable ....................................23 Table 17. T5: LO1 Disable ....................................23 Table 18. T4: Receive IF Duty Cycle Corrector Disable..................................................23 Table 19. T3: Divide-by-3 Duty Cycle Corrector Disable..................................................23 Table 20. FTR: LPF Tune Filter Request ..............24 Table 21. DP: dc Precharge Only .........................24 Table 22. DS: dc Correction Skip..........................24 Table 23. T2: TX IF LO Division Select Switch .....24 Table 24. T1: TX IF LO Divide-by-6 Select ...........24 Table 25. T0: TX IF Duty Cycle Corrector Disable.24 Table 26. G[0:6]: Digital Gain Control ...................25 Table 27. CONFIG Register..................................26 Table 28. C10: LO2 PLL Enable ...........................27 Table 29. OLD: Overload Output Disable..............27 Table 30. C9: RF Mixer On During Settling...........27 Table 31. VO: LO1 Buffer Mode ...........................27 Table 32. C8: LO2 Charge Pump Off....................27 Table 33. LD2: Lock Detect Enable.......................28
Table 34. C7: dc Coarse/Fine Correction ............. 28 Table 35. C6: Filter Tune Disable......................... 28 Table 36. C5: dc Correction Disable..................... 28 Table 37. C4: Low-Pass Filter Bandwidth ............. 28 Table 38. C3: Receive LO1 Buffer Mode During dc Calibration............................................ 29 Table 39. C2: LNA Mode During dc Calibration .... 29 Table 40. C1: 540 MHz LO2 Phase Detector Polarity................................................. 29 Table 41. DT[2:0]: dc Correction Time ................. 30 Table 42. RS: Reset Bit Content .......................... 30 Table 43. Initialize CONFIG Register (Reset W3020) ..................................... 33 Table 44. Initialize TR Register ............................ 33 Table 45. Settle PLL to GSM1800 Band for Receive Mode (W3020/W3000) ......................... 33 Table 46. Perform Receive (W3020).................... 34 Table 47. Settle PLL in GSM1800 Band for Transmit Mode (W3020/W3000) .......... 34 Table 48. Basic GSM1800 Transmit Burst (W3020) ............................................... 34 Table 49. GSM900 LNA S-Parameters................. 37 Table 50. GSM1800/GSM1900 LNA S-Parameters ....................................... 38 Table 51. Receive IF Amplifier Input (0 dB Setting) ....................................... 39 Table 52. Receive IF Amplifier Input (32 dB Setting) ..................................... 39 Table 53. Transmit Modulator IF Output............... 40 Table 54. Transmit IF Input to Up-Conversion Mixer.................................................... 41 Table 55. Transmit RF Output from Up-Conversion Mixer.................................................... 42
Lucent Technologies Inc.
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W3020 GSM Multiband RF Transceiver
Advance Data Sheet December 1999
passed through another external filter to attenuate the image frequency to an acceptable level. The signal passes through the RF down-conversion mixer to the IF frequency. It is then filtered by an external surface acoustic wave (SAW) filter to bring the in-band blocking signals to an acceptable level. The signal is amplified in the IF strip of the receiver. The IF strip contains digital gain control (DGC) amplifiers at both the IF and baseband frequencies and precision lowpass filters. This allows the signal to be amplified while in-band blocking signals are removed. The precision I/Q demodulator splits the signal into its inphase and quadrature signals. The I/Q signals are lowpass filtered and further amplified. The I/Q amplifier contains integrated dc offset calibration circuitry. The outputs (I/Q) are fed to the ADC for further signal processing. The second local oscillator (LO2), comprising a buffer for the external voltage-controlled oscillator (VCO) and a phase-locked loop (PLL), feeds the IF portions of both the modulator and the receiver. An external reference source, voltage-controlled crystal oscillator (VCXO), is divided from 13 MHz to 1 MHz through a counter. The 1 MHz is called the comparison frequency. The VCO frequency of 540 MHz is also divided down to 1 MHz. Both signals are fed into a phase detector, and the resultant error signal is fed through an external low-pass filter to the control input of the VCO. The RF receive and transmit mixers are driven by two band-switchable external VCO modules and buffered internally on the IC. The VCOs are both controlled by a single W3000 PLL synthes
