ADRF6807-EVALZ

700 MHz to 1050 MHz Quadrature Demodulator with Fractional-N PLL ADRF6807 Data Sheet FEATURES GENERAL DESCRIPTION IQ demodulator with integrated fractional-N PLL LO frequency range: 700 MHz to 1050 MHz For the following specifications (LPEN = 0)/(LPEN = 1): Input P1dB: 12.8 dBm/11.7 dBm Input IP3: 26.7 dBm/24.0 dBm Noise figure (DSB): 13.1 dB/12.4 dB Voltage conversion gain: 1.0 dB/4.3 dB Quadrature demodulation accuracy Phase accuracy: 65 26.7 24.0 13.1 12.4 16 −73 dB dBm dBm dBm dBm dBm dBm dB dB dB dBm 1 dB 4.3 dB 170 135 0.35 0.05 ±8 1.65 25 0.2 3 2.4 6 MHz MHz Degrees dB mV V mV dB p-p V p-p V p-p mA p-p 1.75 1 dBm −0.75 dBm 0 50 4 dBm Ω 4 8 2800 4200 MHz ADRF6807 Parameter SYNTHESIZER SPECIFICATIONS Channel Spacing PLL Bandwidth SPURS Reference Spurs PHASE NOISE (USING 67 kHz LOOP FILTER) Integrated Phase Noise Phase Detector Frequency PHASE NOISE (USING 2.5 kHz LOOP FILTER) PLL FIGURE OF MERIT (FOM) Phase Detector Frequency REFERENCE CHARACTERISTICS REFIN Input Frequency REFIN Input Capacitance MUXOUT Output Level REFOUT Duty Cycle CHARGE PUMP Pump Current Output Compliance Range LOGIC INPUTS Input High Voltage, VINH Input Low Voltage, VINL Input Current, IINH/IINL Input Capacitance, CIN Data Sheet Test Conditions/Comments All synthesizer specifications measured with recommended settings provided in Figure 33 through Figure 40 fPFD = 26 MHz Can be adjusted with off-chip loop filter component values and RSET fLO = 900 MHz, fREF = 26 MHz, fPFD = 26 MHz, measured at baseband outputs with fBB = 50 MHz fREF = 26 MHz, fPFD = 26 MHz fREF/2 fREF × 2 fREF × 3 fLO = 900 MHz, fREF = 26 MHz, fPFD = 26 MHz, measured at baseband outputs with fBB = 50 MHz At 1 kHz offset At 10 kHz offset At 100 kHz offset At 500 kHz offset At 1 MHz offset At 5 MHz offset At 10 MHz offset 1 kHz to 10 MHz integration bandwidth Min Max kHz kHz −93 −104 −85 −97 dBc dBc dBc dBc 20 −104 −107 −111 −131 −138 −149 −152 0.13 26 40 dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz °rms MHz 20 −73 −90 −119 −135 −141 −150 −152 −215.4 −220.9 26 40 dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz/Hz dBc/Hz/Hz MHz 9 160 4 VOL (lock detect output selected) VOH (lock detect output selected) Unit 25 67 fLO = 900 MHz, fREF = 26 MHz, fPFD = 26 MHz, measured at baseband outputs with fBB = 50 MHz At 1 kHz offset At 10 kHz offset At 100 kHz offset At 500 kHz offset At 1 MHz offset At 5 MHz offset At 10 MHz offset Measured with fREF = 26 MHz, fPFD = 26 MHz Measured with fREF = 104 MHz, fPFD = 26 MHz REFIN, MUXOUT pins Usable range Typ 0.25 2.7 50 500 1 2.8 1.4 0 3.3 0.7 MHz pF V V % μA V CLK, DATA, LE pins 0.1 5 Rev. B | Page 4 of 36 V V μA pF Data Sheet ADRF6807 Parameter POWER SUPPLIES Voltage Range (3.3 V) Voltage Range (5 V) Supply Current (3.3 V) (LPEN = 0) Supply Current (5 V) (LPEN = 0) Supply Current (3.3 V) (LPEN = 1) Supply Current (5 V) (LPEN = 1) Supply Current (5 V) Supply Current (3.3 V) Test Conditions/Comments VCC1, VCC2, VCCLO, VCCBB, VCCRF pins VCC1, VCC2, VCCLO VCCBB, VCCRF Normal Rx mode Rx mode with LO buffer enabled Normal Rx mode Rx mode with LO buffer enabled Normal Rx mode Rx mode with LO buffer enabled Normal Rx mode Rx mode with LO buffer enabled Power-down mode Power-down mode Min Typ Max Unit 3.135 4.75 3.3 5 170 227 86 86 166 214 76 76 10 15 3.465 5.25 V V mA mA mA mA mA mA mA mA mA mA TIMING CHARACTERISTICS VS1 (VVCCBB and VVCCRF) = 5 V, and VS2 (VVCC1, VVCC2, and VVCCLO) = 3.3 V. Table 2. Parameter t1 t2 t3 t4 t5 t6 t7 Limit at TMIN to TMAX 20 10 10 25 25 10 20 Unit ns min ns min ns min ns min ns min ns min ns min t4 Test Conditions/Comments LE setup time DATA to CLK setup time DATA to CLK hold time CLK high duration CLK low duration CLK to LE setup time LE pulse width t5 CLK t2 DATA DB23 (MSB) t3 DB22 DB2 (CONTROL BIT C3) DB1 (CONTROL BIT C2) DB0 (LSB) (CONTROL BIT C1) t7 LE t1 09993-002 t6 LE Figure 2. Timing Diagram Rev. B | Page 5 of 36 ADRF6807 Data Sheet ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Supply Voltage, VCCBB and VCCRF (VS1) Supply Voltage, VCC1, VCC2, and VCCLO (VS2) Digital I/O, CLK, DATA, and LE RFIP and RFIN (Each Pin AC-Coupled) θJA (Exposed Paddle Soldered Down) Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Rating −0.5 V to +5.5 V −0.5 V to +3.6 V −0.3 V to +3.6 V 13 dBm 30°C/W 150°C −40°C to +85°C −65°C to +150°C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ESD CAUTION Rev. B | Page 6 of 36 Data Sheet ADRF6807 1 VCC1 2 CPOUT 3 GND VCCLO IBBP IBBN GND 35 34 33 32 31 BUFFER CTRL ADRF6807 SCALE GND PHASE DETECTOR AND CHARGE PUMP DIV ÷4, ÷6, ÷8 DIV CTRL 4 5 VCO BAND 6 ÷2 GND 7 MUXOUT 8 DECL2 9 ENABLE MUX ×2 REFIN FRACTION 10 VCO 2800MHz TO 4200MHz MUX DIV ÷2 29 DECL3 28 VCCRF 27 GND 26 RFIN 25 RFIP 24 GND 23 VOCM 22 VCCBB 21 GND QUADRATURE ÷2 6 PRESCALER ÷2 COMMONMODE LEVEL CONTROL THIRD-ORDER SDM 2.5V LDO VCC2 CURRENT CAL/SET 6 PROGRAMABLE DIVIDER ÷4 GND BLEED DIV CTRL RSET 30 MODULUS INTEGER 16 17 18 19 20 VCCLO QBBP QBBN GND 14 LE GND 13 CLK 15 12 DATA GND 11 GND SERIAL PORT NOTES 1. THE EXPOSED PADDLE SHOULD BE SOLDERED TO A LOW IMPEDANCE GROUND PLANE. 09993-003 VCC1 LOSEL LON 37 VCO LDO 36 LOP 38 39 40 DECL1 VTUNE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Figure 3. Pin Configuration Table 4. Pin Function Descriptions Pin No. 1, 2 3 4, 7, 11, 15, 16, 20, 21, 24, 27, 30, 31, 35 5 Mnemonic VCC1 CPOUT GND Description The 3.3 V Power Supply for VCO and PLL. Charge Pump Output Pin. Connect this pin to VTUNE through the loop filter. Ground. Connect these pins to a low impedance ground plane. RSET Charge Pump Current. The nominal charge pump current can be set to 250 μA, 500 μA, 750 μA, or 1 mA using DB10 and DB11 of Register 4 and by setting DB18 to 0 (internal reference current). In this mode, no external RSET is required. If DB18 is set to 1, the four nominal charge pump currents (INOMINAL) can be externally tweaked according to the following equation where the resulting value is in units of ohms. ⎡ 217 .4 × I CP ⎤ RSET = ⎢ ⎥ − 37 .8 ⎣ I NOMINAL ⎦ Rev. B | Page 7 of 36 ADRF6807 Data Sheet Pin No. 6 8 Mnemonic REFIN MUXOUT 9 10 12 13 DECL2 VCC2 DATA CLK 14 LE 17, 34 18, 19 22 23 VCCLO QBBP, QBBN VCCBB VOCM 25, 26 28 29 32, 33 36 RFIP, RFIN VCCRF DECL3 IBBN, IBBP LOSEL 37, 38 LON, LOP 39 VTUNE 40 DECL1 EP Description Reference Input. Nominal input level is 1 V p-p. Input range is 9 MHz to 160 MHz. Multiplexer Output. This output can be programmed to provide the reference output signal or the lock detect signal. The output is selected by programming the appropriate register. Connect a 0.1 μF capacitor between this pin and ground. 3.3 V Power Supply for 2.5 V LDO. Serial Data Input. The serial data is loaded MSB first with the three LSBs being the control bits. Serial Clock Input. This serial clock is used to clock in the serial data to the registers. The data is latched into the 24-bit shift register on the CLK rising edge. Maximum clock frequency is 20 MHz. Load Enable. When the LE input pin goes high, the data stored in the shift registers is loaded into one of the six registers, the relevant latch being selected by the first three control bits of the 24-bit word. 3.3 V Power Supply for LO Path Blocks. Demodulator Q-Channel Differential Baseband Outputs (Differential Output Impedance of 28 Ω). 5 V Power Supply for Demodulator Blocks. Baseband Common-Mode Reference Input; 1.65 V Nominal. It sets the dc common-mode level of the IBBx and QBBx outputs. Differential 100 Ω, Internally Biased RF Inputs. These pins must be ac-coupled. 5 V Power Supply for Demodulator Blocks. Connect a 2.2 μF capacitor between this pin and ground. Demodulator I-Channel Differential Baseband Outputs (Differential Output Impedance of 28 Ω). LO Select. Connect this pin to ground for the simplest operation and to completely control the LO path and input/output direction from the register programming of the SPI. For additional control without register reprogramming, this input pin can determine whether the LOP and LON pins operate as inputs or outputs. LOP and LON become inputs if the LOSEL pin is set low, the LDRV bit of Register 5 is set low, and the LXL bit of Register 5 is set high. The externally applied LO drive must be at M×LO frequency (where M corresponds to the main LO divider setting). LON and LOP become outputs when LOSEL is high or if the LDRV bit of Register 5 (DB3) is set high and the LXL bit of Register 5 (DB4) is set to low. The output frequency is controlled by the LO output divider bits in Register 7. This pin should not be left floating. Local Oscillator Input/Output (Differential Output Impedance of 28 Ω). When these pins are used as output pins, a differential frequency divided version of the internal VCO is available on these pins. When the internal LO generation is disabled, an external M×LO frequency signal can be applied to these pins, where M corresponds to the main divider setting. VCO Control Voltage Input. This pin is driven by the output of the loop filter. The nominal input voltage range on this pin is 1.0 V to 2.8 V. Connect a 10 μF capacitor between this pin and ground as close to the device as possible because this pin serves as the VCO supply and loop filter reference. Exposed Paddle. The exposed paddle should be soldered to a low impedance ground plane. Rev. B | Page 8 of 36 Data Sheet ADRF6807 TYPICAL PERFORMANCE CHARACTERISTICS 16 14 80 LPEN = 0 LPEN = 1 T = +85°C T = +25°C T = –40°C T = +85°C T = +25°C T = –40°C I CHANNEL Q CHANNEL 75 LPEN = 1 10 INPUT IP2 (dBm) 12 IP1dB 8 GAIN 6 70 65 LPEN = 0 60 4 55 0 700 725 750 775 800 825 850 875 900 925 950 975 1000 1050 1025 LO FREQUENCY (MHz) 50 700 725 750 40 38 800 850 900 950 1000 1050 825 875 925 975 1025 LO FREQUENCY (MHz) Figure 7. Input IP2 vs. LO Frequency Figure 4. Conversion Gain and Input P1dB vs. LO Frequency T = +85°C T = +25°C T = –40°C 775 09993-007 2 09993-004 CONVERSION GAIN (dB) AND INPUT P1dB (dBm) VS1 = 5 V, VS2 = 3.3 V, TA = 25°C, RF input balun loss is de-embedded, unless otherwise noted. LO = 700 MHz to 1050 MHz; Mini-Circuits ADTL2-18 balun on RF inputs. 17 LPEN = 0 LPEN = 1 T = +85°C T = +25°C T = –40°C 16 15 36 LPEN = 0 LPEN = 1 14 NOISE FIGURE (dB) 32 30 28 26 12 11 10 9 8 24 7 22 725 750 775 800 850 900 950 1000 1050 825 875 925 975 1025 LO FREQUENCY (MHz) 5 700 725 LPEN = 0 LPEN = 1 IQ QUADRATURE PHASE ERROR (Degrees) 0.8 2.0 T = +85°C T = +25°C T = –40°C 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 725 750 775 800 850 900 950 1000 1050 825 875 925 975 1025 LO FREQUENCY (MHz) 09993-006 IQ GAIN MISMATCH (dB) 0.6 –1.0 700 775 800 850 900 950 1000 1050 825 875 925 975 1025 LO FREQUENCY (MHz) Figure 8. Noise Figure vs. LO Frequency Figure 5. Input IP3 vs. LO Frequency 1.0 750 09993-008 6 09993-005 20 700 13 T = +85°C T = +25°C T = –40°C 1.5 LPEN = 0 LPEN = 1 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 700 725 750 775 800 850 900 950 1000 1050 825 875 925 975 1025 LO FREQUENCY (MHz) Figure 9. IQ Quadrature Phase Error vs. LO Frequency Figure 6. IQ Gain Mismatch vs. LO Frequency Rev. B | Page 9 of 36 09993-009 INPUT IP3 (dBm) 34 ADRF6807 1 LPEN = 0 LPEN = 1 NORMALIZED BASEBAND FREQUENCY RESPONSE (dB) LO-TO-RF FEEDTHROUGH (dBm) –1 –60 –65 –70 –75 –80 –2 –3 –4 –5 –6 –7 –8 –9 –10 –85 –11 725 750 775 800 850 900 950 1000 1050 825 875 925 975 1025 LO FREQUENCY (MHz) –12 09993-010 –90 700 LPEN = 0 LPEN = 1 0 –55 1 Figure 10. LO-to-RF Feedthrough vs. LO Frequency, LO Output Turned Off 80 LPEN = 0 LPEN = 1 –45 –50 –55 –60 –65 –70 –75 100 400 Figure 13. Normalized BB Frequency Response INPUT P1dB (dBm), INPUT IP2 (dBm), AND INPUT IP3 (dBm) LO-TO-BB FEEDTHROUGH (dBV rms) –40 10 BASEBAND FREQUENCY (MHz) 09993-013 –50 Data Sheet LPEN = 1 IIP2 70 LPEN = 0 60 TA = +85°C TA = +25°C TA = –40°C 50 I CHANNEL Q CHANNEL 40 LPEN = 0 IIP3 30 20 LPEN = 1 LPEN = 0 IP1dB 10 800 850 900 950 1000 1050 LO FREQUENCY (MHz) 09993-111 750 0 Figure 11. LO-to-BB Feedthrough vs. LO Frequency, LO Output Turned Off –30 30 28 15 20 25 30 35 40 BASEBAND FREQUENCY (MHz) 45 50 LPEN = 0 LPEN = 1 26 –40 NOISE FIGURE (dB) 24 –45 –50 –55 22 20 18 16 14 –60 12 –65 10 750 800 850 900 950 RF FREQUENCY (MHz) 1000 1050 Figure 12. RF-to-BB Feedthrough vs. RF Frequency 8 –30 –25 –20 –15 –10 –5 0 5 INPUT BLOCKER POWER (dBm) Figure 15. Noise Figure vs. Input Blocker Power, fLO = 900 MHz (RF Blocker 5 MHz Offset) Rev. B | Page 10 of 36 10 09993-115 –70 700 09993-112 RF-TO-BB FEEDTHROUGH (dBc) 10 Figure 14. Input P1dB, Input IP2, and Input IP3 vs. BB Frequency LPEN = 0 LPEN = 1 –35 5 09993-014 LPEN = 1 –80 700 Data Sheet ADRF6807 0 2.0 –2 1.9 –4 LPEN = 0 LPEN = 1 1.8 –8 VPTAT VOLTAGE (V) RF RETURN LOSS (dB) –6 –10 –12 –14 –16 –18 –20 –22 1.7 1.6 1.5 1.4 –24 –26 1.3 725 750 800 775 850 900 950 1000 1050 825 875 925 975 1025 RF FREQUENCY (MHz) 1.2 –40 09993-016 –30 700 20 40 60 80 Figure 19. VPTAT Voltage vs. Temperature 0 3.5 –2 –4 3.0 –6 TA = +85°C TA = +25°C TA = –40°C –8 VTUNE VOLTAGE (V) –10 –12 –14 –16 –18 –20 –22 2.5 2.0 1.5 –24 1.0 –26 400 450 500 550 650 750 850 950 1050 600 700 800 900 1000 LO OUTPUT FREQUENCY (MHz) Figure 17. LO Output Return Loss vs. LO Output Frequency, LO Output Enabled (350 MHz to 1050 MHz) 260 235 210 0.5 350 09993-017 –28 –30 350 LPEN = 0 LPEN = 1 3.3V SUPPLY 160 135 5V SUPPLY 750 775 800 850 900 950 1000 1050 825 875 925 975 1025 LO FREQUENCY (MHz) 09993-018 85 725 410 430 450 470 490 510 Figure 20. VTUNE Voltage vs. LO Frequency, Measured at the LO Output Pins with LO Output in Divide-by-8 Mode 185 60 700 390 LO FREQUENCY (MHz) T = +85°C T = +25°C T = –40°C 110 370 09993-020 LO OUTPUT RETURN LOSS (dB) 0 TEMPERATURE (°C) Figure 16. RF Input Return Loss vs. RF Frequency, Measured Through ADTL2-18 2-to-1 Input Balun CURRENT (mA) –20 09993-019 –28 Figure 18. 5 V and 3.3 V Supply Currents vs. LO Frequency, LO Output Disabled Rev. B | Page 11 of 36 ADRF6807 Data Sheet SYNTHESIZER/PLL VS1 = 5 V, VS2 = 3.3 V, see the Register Structure section for recommended settings used. External loop filter bandwidth of ~67 kHz, fREF = fPFD = 26 MHz, measured at BB output, fBB = 50 MHz, unless otherwise noted. –60 1.8 INTEGRATED PHASE NOISE (°rms) –70 2.0 TA = +85°C TA = +25°C TA = –40°C 2.5kHz LOOP FILTER –90 –100 –110 67kHz LOOP FILTER –120 –130 –140 –150 1.0 0.8 0.6 0.4 10k 100k 1M OFFSET FREQUENCY (Hz) 10M 0 700 –75 TA = +85°C TA = +25°C TA = –40°C –70 950 1000 1050 1kHz OFFSET –80 PHASE NOISE (dBc/Hz) –95 –100 –90 –110 850 900 950 1000 –130 LO FREQUENCY (MHz) Figure 22. PLL Reference Spurs vs. LO Frequency TA = +85°C TA = +25°C TA = –40°C TA = +85°C TA = +25°C TA = –40°C 67kHz LOOP FILTER BANDWIDTH 2.5kHz LOOP FILTER BANDWIDTH 5MHz OFFSET 1050 –160 700 09993-022 800 10kHz OFFSET –120 –150 0.5× PFD FREQUENCY 750 10kHz OFFSET 1kHz OFFSET –100 –140 –105 750 800 850 900 950 1000 1050 LO FREQUENCY (MHz) Figure 25. Phase Noise vs. LO Frequency (1 kHz, 10 kHz, and 5 MHz Offsets) –80 2× PFD FREQUENCY 4× PFD FREQUENCY –90 PHASE NOISE (dBc/Hz) –80 –85 –90 –95 –100 –105 TA = +85°C TA = +25°C TA = –40°C –100 67kHz LOOP FILTER BANDWIDTH 2.5kHz LOOP FILTER BANDWIDTH 100kHz OFFSET –110 –120 100kHz OFFSET 1MHz OFFSET –130 –140 –150 750 800 850 900 950 1000 LO FREQUENCY (MHz) Figure 23. PLL Reference Spurs vs. LO Frequency 1050 –160 700 09993-023 –110 700 900 –60 1× PFD FREQUENCY 3× PFD FREQUENCY –90 –75 850 Figure 24. Integrated Phase Noise vs. LO Frequency (Spurs Omitted) –85 –70 800 LO FREQUENCY (MHz) –80 –110 700 750 09993-025 –70 PLL REFERENCE SPURS (dBc) 1.2 09993-024 1k Figure 21. Phase Noise vs. Offset Frequency, fLO = 900 MHz PLL REFERENCE SPURS (dBc) 1.4 0.2 09993-021 –160 1.6 750 800 850 900 LO FREQUENCY (MHz) 950 1000 1050 09993-026 PHASE NOISE (dBc/Hz) –80 TA = +85°C TA = +25°C TA = –40°C Figure 26. Phase Noise vs. LO Frequency (100 kHz and 1 MHz Offsets) Rev. B | Page 12 of 36 Data Sheet ADRF6807 COMPLEMENTARY CUMULATIVE DISTRIBUTION FUNCTIONS (CCDF) 70 60 GAIN 50 IP1dB 40 30 20 10 0 0 2 4 6 8 10 12 14 GAIN (dB) AND INPUT P1dB (dBm) 90 80 LPEN = 1 70 LPEN = 0 60 50 40 30 20 10 0 50 55 60 80 I CHANNEL Q CHANNEL CUMULATIVE DISTRIBUTION PERCENTAGE (%) 90 T = +85°C T = +25°C T = –40°C 70 60 50 LPEN = 1 LPEN = 0 40 30 20 10 0 20 21 22 23 24 25 26 27 28 29 30 INPUT IP3 (dBm) 80 LPEN = 0 LPEN = 1 70 60 50 40 30 20 10 6 7 8 9 LPEN = 0 LPEN = 1 70 60 50 40 30 20 10 –0.8 –0.6 –0.4 –0.2 0 0.2 11 12 13 14 15 16 17 18 19 2.0 Figure 31. Noise Figure 80 0 –1.0 10 NOISE FIGURE (dB) CUMULATIVE DISTRIBUTION PERCENTAGE (%) T = +85°C T = +25°C T = –40°C 80 T = +85°C T = +25°C T = –40°C 90 0 0.4 IQ GAIN MISMATCH (dB) 0.6 0.8 1.0 09993-129 CUMULATIVE DISTRIBUTION PERCENTAGE (%) 90 75 100 Figure 28. Input IP3 100 70 Figure 30. Input IP2 09993-028 CUMULATIVE DISTRIBUTION PERCENTAGE (%) Figure 27. Gain and Input P1dB 100 65 INPUT IP2 (dBm) 09993-030 80 100 09993-029 90 LPEN = 0 LPEN = 1 09993-132 T = +85°C T = +25°C T = –40°C CUMULATIVE DISTRIBUTION PERCENTAGE (%) 100 09993-027 CUMULATIVE DISTRIBUTION PERCENTAGE (%) VS1 = 5 V, VS2 = 3.3 V, fLO = 900 MHz, fBB = 4.5 MHz. Figure 29. IQ Gain Mismatch 100 90 T = +85°C T = +25°C T = –40°C LPEN = 0 LPEN = 1 80 70 60 50 40 30 20 10 0 –2.0 –1.5 –1.0 –0.5 0 0.5 1.0 IQ QUADRATURE PHASE ERROR (Degrees) Figure 32. IQ Quadrature Phase Error Rev. B | Page 13 of 36 1.5 ADRF6807 Data Sheet CIRCUIT DESCRIPTION The ADRF6807 integrates a high performance IQ demodulator with a state-of-the-art fractional-N PLL. The PLL also integrates a low noise VCO. The SPI port allows the user to control the fractional-N PLL functions, the demodulator LO divider functions, and optimization functions, as well as allowing for an externally applied LO. The common-mode dc output levels of the emitter follower outputs are set by the voltage applied to the VOCM pin. The VOCM pin must be driven with a voltage (typically 1.65 V) for the emitter follower buffers to function. If the VOCM pin is left open, the emitter follower outputs do not bias up properly. The ADRF6807 uses a high performance mixer core that results in an exceptional input IP3 and input P1dB, with a very low output noise floor for excellent dynamic range. There are several band gap reference circuits and two low dropout regulators (LDOs) in the ADRF6807 that generate the reference currents and voltages used by different sections. One of the LDOs is the 2.5V_LDO, which is always active and provides the 2.5 V supply rail used by the internal digital logic blocks. The 2.5V_LDO output is connected to the DECL2 pin (Pin 9) for the user to provide external decoupling. The other LDO is the VCO_LDO, which acts as the positive supply rail for the internal VCO. The VCO_LDO output is connected to the DECL1 pin (Pin 40) for the user to provide external decoupling. The VCO_LDO can be powered down by setting Register 6, DB18 = 0, which allows the user to save power when not using the VCO. Additionally, the bias current for the mixer V-to-I stage, which drives the mixer core, can be reduced by putting the device in low power mode (setting LPEN = 1 by setting Register 5, DB5 = 1). LO QUADRATURE DRIVE A signal at 2× the desired mixer LO frequency is delivered to a divide-by-2 quadrature phase splitter followed by limiting amplifiers, which then drive the I and Q mixers, respectively. V-TO-I CONVERTER The differential RF input signal is applied to a V-to-I converter that converts the differential input voltage to output currents. The V-to-I converter provides a differential 100 Ω input impedance. The V-to-I bias current can be reduced by putting the device in low power mode (setting LPEN = 1 by setting Register 5, DB5 = 1). Generally with LPEN = 1, input IP3 and input P1dB degrade, but the noise figure is slightly better. Overall, the dynamic range is reduced by setting LPEN = 1. MIXERS The ADRF6807 has two double-balanced mixers: one for the inphase channel (I channel) and one for the quadrature channel (Q channel). These mixers are based on the Gilbert cell design of four cross-connected transistors. The output currents from the two mixers are summed together in the resistive loads that then feed into the subsequent emitter follower buffers. When the part is put into its low power mode (LPEN = 1), the mixer core load resistors are increased, which does increase the gain by roughly 3 dB; however, as previously stated in the V-to-I Converter section, the overall dynamic range does decrease slightly. EMITTER FOLLOWER BUFFERS The output emitter followers drive the differential I and Q signals off chip. The output impedance is set by on-chip 14 Ω series resistors that yield a 28 Ω differential output impedance for each baseband port. The fixed output impedance forms a voltage divider with the load impedance that reduces the effective gain. For example, a 500 Ω differential load has ~0.5 dB lower effective gain than a high (10 kΩ) differential load impedance. BIAS CIRCUITRY REGISTER STRUCTURE The ADRF6807 provides access to its many programmable features through a 3-wire SPI control interface that is used to program the seven internal registers. The minimum delay and hold times are shown in the timing diagram (see Figure 2). The SPI provides digital control of the internal PLL/VCO as well as several other features related to the demodulator core, on-chip referencing, and available system monitoring functions. The MUXOUT pin provides a convenient, single-pin monitor output signal that can be used to deliver a PLL lock-detect signal or an internal voltage proportional to the local junction temperature. Note that internal calibration for the PLL must run when the ADRF6807 is initialized at a given frequency. This calibration is run automatically whenever Register 0, Register 1, or Register 2 is programmed. Because the other registers affect PLL performance, Register 0, Register 1, and Register 2 must always be programmed last. For ease of use, starting the initial programming with Register 7 and then programming the registers in descending order ending with Register 0 is recommended. Once the PLL and other settings are programmed, the user can change the PLL frequency simply by programming Register 0, Register 1, or Register 2 as necessary. Rev. B | Page 14 of 36 Data Sheet ADRF6807 DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 0 0 0 0 0 0 0 0 0 0 0 0 0 DM INTEGER DIVIDE RATIO CONTROL BITS DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 ID6 ID4 ID3 ID2 ID1 ID0 C3(0) C2(0) C1(0) ID5 DM DIVIDE MODE 0 1 FRACTIONAL (DEFAULT) INTEGER DIVIDE RATIO ID6 ID5 ID4 ID3 ID2 ID1 ID0 0 0 1 0 1 0 1 21 (INTEGER MODE ONLY) 0 0 1 0 1 1 0 22 (INTEGER MODE ONLY) 0 0 1 0 1 1 1 23 (INTEGER MODE ONLY) 0 0 1 1 0 0 0 24 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0 1 1 1 0 0 0 56 (DEFAULT) ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 1 1 1 0 1 1 1 119 1 1 1 1 0 0 0 120 (INTEGER MODE ONLY) 1 1 1 1 0 0 1 121 (INTEGER MODE ONLY) 1 1 1 1 0 1 0 122 (INTEGER MODE ONLY) 1 1 1 1 0 1 1 123 (INTEGER MODE ONLY) 09993-031 DIVIDE MODE Figure 33. Integer Divide Control Register (R0) Register 0—Integer Divide Control With R0[2:0] set to 000, the on-chip integer divide control register is programmed as shown in Figure 33. The internal VCO frequency (fVCO) equation is fVCO = fPFD × (INT + (FRAC/MOD)) × 2 (1) where: fVCO is the output frequency of the internal VCO. INT is the preset integer divide ratio value (21 to 123 for integer mode, 24 to 119 for fractional mode). FRAC is the preset fractional divider ratio value (0 to MOD − 1). MOD is the preset fractional modulus (1 to 2047). The integer divide ratio sets the INT value in Equation 1. The INT, FRAC, and MOD values make it possible to generate output frequencies that are spaced by fractions of the PFD frequency. Note that the demodulator LO frequency is given by fLO = fVCO/M, where M is the programmed LO main divider (see Table 5). Divide Mode Divide mode determines whether fractional mode or integer mode is used. In integer mode, the VCO output frequency, fVCO, is calculated by Rev. B | Page 15 of 36 fVCO = fPFD × (INT) × 2 (2) ADRF6807 Data Sheet Register 1—Modulus Divide Control With R1[2:0] set to 001, the on-chip modulus divide control register is programmed as shown in Figure 34. The MOD value is the preset fractional modulus ranging from 1 to 2047. CONTROL BITS MODULUS DIVIDE RATIO 0 0 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 0 0 0 MD10 MD9 MD8 MD7 MD6 MD5 MD4 MD3 MD2 MD1 MD0 C3(0) C2(0) C1(1) MD10 MD9 MD8 MD7 MD6 MD5 MD4 MD3 MD2 MD1 MD0 MODULUS VALUE 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 1 0 2 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 1 1 0 0 0 0 0 0 0 0 0 1536 (DEFAULT) ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 1 1 1 1 1 1 1 1 1 1 1 2047 09993-032 DB23 DB22 Figure 34. Modulus Divide Control Register (R1) Register 2—Fractional Divide Control With R2[2:0] set to 010, the on-chip fractional divide control register is programmed as shown in Figure 35. The FRAC value is the preset fractional modulus ranging from 0 to MOD − 1. CONTROL BITS FRACTIONAL DIVIDE RATIO DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 0 0 0 0 0 FD10 FD9 FD8 FD7 FD6 FD5 FD4 FD3 FD2 FD1 FD0 C3(0) C2(1) C1(0) FD9 FD8 FD7 FD6 FD5 FD4 FD3 FD2 FD1 FD0 FRACTIONAL VALUE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0 1 1 0 0 0 0 0 0 0 0 768 (DEFAULT) ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 09993-033 FD10 ~fPLL/(fPFD × 2 × 2), or 8.8 MHz A lock detect signal is available as one of the selectable outputs through the MUXOUT pin, with logic high signifying that the loop is locked. REGISTER PROGRAMMING Because Register 6 controls the powering of the VCO and charge pump, it must be programmed once before programming the PLL frequency (Register 0, Register 1, and Register 2). The registers should be programmed starting with the highest register (Register 7) first and then sequentially down to Register 0 last. When Register 0, Register 1, or Register 2 is programmed, an internal VCO calibration is initiated that must execute when the other registers are set. Therefore, the order must be Register 7, Register 6, Register 5, Register 4, Register 3, Register 2, Register 1, and then Register 0. Whenever Register 0, Register 1, or Register 2 is written to, it initializes the VCO calibration (even if the value in these registers does not change). After the device has been powered up and the registers configured for the desired mode of operation, only Register 0, Register 1, or Register 2 must be programmed to change the LO frequency. If none of the register values are changing from their defaults, there is no need to program them. Rev. B | Page 23 of 36 ADRF6807 Data Sheet EVM is a measure used to quantify the performance of a digital radio transmitter or receiver. A signal received by a receiver has all constellation points at their ideal locations; however, various imperfections in the implementation (such as magnitude imbalance, noise floor, and phase imbalance) cause the actual constellation points to deviate from their ideal locations. In general, a demodulator exhibits three distinct EVM limitations vs. received input signal power. As signal power increases, the distortion components increase. At large signal levels, where the distortion components due to the harmonic nonlinearities in the device are falling in-band, EVM degrades as signal levels increase. At medium signal levels, where the demodulator behaves in a linear manner and the signal is well above any notable noise contributions, the EVM has a tendency to reach an optimal level determined dominantly by either quadrature accuracy and I/Q gain match of the demodulator or the precision of the test equipment. As signal levels decrease, such that the noise is a major contribution, the EVM performance vs. the signal level exhibits a decibel-for-decibel degradation with decreasing signal level. At lower signal levels, where noise proves to be the dominant limitation, the decibel EVM proves to be directly proportional to the SNR. Figure 42 shows the excellent EVM of the ADRF6807 being better than −40 dB over an RF input range of about 40 dB for a 4 QAM modulated signal, at a 5 MHz symbol rate and at a 0 Hz IF. The roll-off, or alpha, of the pulse shaping filter was set to 0.35. The reported RF input power is the power integrated across the bandwidth of BW = (1 + α) × (Symbol Rate) EVM was tested for both power modes: low power mode disabled (LPEN = 0) and low power mode enabled (LPEN = 1). When the low power mode is enabled, the EVM is better at lower RF input signal levels due to less noise while running in the low power mode. 0 –5 LPEN = 0 LPEN = 1 –10 –15 EVM (dB) EVM MEASUREMENTS –20 –25 –30 –35 –40 –50 –60 –50 –40 –30 –20 –10 RF INPUT POWER (dBm) 0 10 20 09993-040 –45 The basic test setup for testing the EVM of the ADRF6807 consisted of an Agilent E4438C, which was used as a signal source. The 900 MHz modulated signal was driven single ended into the RFIN SMA connector of the ADRF6807 evaluation board. The IQ baseband outputs were taken differentially into a pair of AD8130 difference amplifiers to convert the differential signals to single ended. The output impedance that the ADRF6807 drove was set to 450 Ω differential. The single-ended I and Q signals were then sampled by an Agilent DSO7104B oscilloscope. The Agilent 89400 VSA software was used to calculate the EVM of the signal. The signal source that was used for the reference input was a Wenzel 100 MHz quarts oscillator set at an amptude of 1 V p-p. The reference path was set to a divide-by-four, thus making the PFD frequency 25 MHz. Figure 42. EVM Measurements at 900 MHz 4 QAM, Symbol Rate = 5 MHz, Baseband Frequency = 0 Hz IF Rev. B | Page 24 of 36 C4 10µF Figure 43. Evaluation Board Schematic LEGEND SMA INPUT/OUTPUT TEST POINT NET NAME 2P5V 0Ω R16 1nF C31 C11 0.1µF R37 0Ω GND2 GND1 GND R27 0Ω C17 0.1µF 2P5V_LDO R26 49.9Ω C3 10µF VCC2 C27 10µF REFOUT REFIN C10 100pF R7 0Ω C9 0.1µF 0Ω 3P3V2 R15 0Ω R13 39 36 35 34 33 31 C7 0.1µF JP1 VCC_LO R31 0Ω 0Ω R17 C19 0.1µF 0Ω R18 0Ω R8 DIG_GND C18 100pF C16 100pF R2 R1 OPEN R12 0Ω 40 RSET GND C33 OPEN DATA DATA 10 VCC2 C32 OPEN CLK R51 OPEN 12 11 9 DECL2 8 MUXOUT 7 GND 6 REFIN 5 4 3 CPOUT 2 VCC1 1 VCC1 C1 C2 100pF 0.1µF OPEN C12 100pF C35 10µF C15 6.2nF VCO_LDO R49 OPEN R11 OPEN C14 300pF 1 C6 1nF 38 3 ADRF6807 14 CLK 15 LE R50 OPEN C34 OPEN 13 37 C5 1nF T1 R57 0Ω 17 18 C21 100pF R52 OPEN LE 16 32 0Ω R24 19 20 R14 0Ω C20 0.1µF GND 21 VCCBB 22 VOCM 23 GND 24 RFIP 25 RFIN 26 GND 27 VCCRF 28 DECL3 29 GND 30 C37 10µF R34 0Ω VCC_LO 0Ω R48 0Ω R47 C40 0.1µF 1000pF 3.3V_FORCE R22 0Ω P3 R21 0Ω 0Ω C23 0.1µF 3.3V_SENSE VCC3 6 1 4 T4 3 C36 10µF R5 0Ω P2 R4 0Ω T3 2 4 5 VCC_BB C29 0.1µF 3 1 C25 0.1µF VCC_RF VCC_RF VCC DECL3 2 5 3 T2 4 1 C30 0.1µF VCC R32 0Ω VCC_BB VCC_BB1 R25 R44 OPEN VCC_LO1 C22 100pF VOCM C39 1000pF 0Ω C24 100pF R28 R41 C28 10µF C26 100pF OPEN R29 0Ω C38 0Ω R46 0Ω LOP CLK C13 62pF LON LE VCC3 VCC_LO C8 100pF R6 0Ω 3P3V_FORCE R45 GND DECL1 5 2 GND 4 GND R9 LOSEL 5.6kΩ QBBP R10 1.6kΩ IBBP 0Ω LO 10kΩ R56 S1 VCCLO VCCLO GND R38 10kΩ R55 IBBN QBBN 3P3V1 CP VCC VTUNE GND Rev. B | Page 25 of 36 DATA R42 OPEN 0Ω R43 R23 OPEN R63 4.99kΩ R62 4.99kΩ RFIN R39 OPEN 0Ω R40 R3 OPEN QBBN QOUT_SE QBBP P1 3P3V_FORCE IBBN IOUT_SE IBBP VOCM An evaluation board is available for testing the ADRF6807. The evaluation board schematic is shown in Figure 43. GND VCC_RF Data Sheet ADRF6807 EVALUATION BOARD LAYOUT AND THERMAL GROUNDING Table 7 provides the component values and suggestions for modifying the component values for the various modes of operation. 09993-042 Figure 44. Evaluation Board USB Section Schematic C43 0.1µF 3V3_USB C41 0.1µF C53 0.1µF 3V3_USB 3V3_USB U2 24LC64-I_SN C42 0.1µF C55 0.1µF C44 0.1µF C46 0.1µF 4 GND VCC 8 WC_N 7 SCL 6 2 A1 3 A2 SDA 5 1 A0 16 SCL 15 R19 2kΩ 17 3V3_USB SDA 14 RESERVED 13 IFCLK 12 GND 11 VCC 10 AGND G3 G4 9 DMINUS 5 G1 G2 8 DPLUS 18 21 C57 0.1µF C56 10pF 20 C52 1.0µF 3V3_USB R60 2kΩ 19 R70 140kΩ 25 27 3V3_USB 26 R69 78.7kΩ C50 1000pF 24 23 3V3_USB 22 4 NC 3 FB 2 OUT2 1 OUT1 28 SD IN1 IN2 GND U3 ADP3334 CTL0_FLAGA 29 CTL1_FLAGB 30 CTL2_FLAGC 31 VCC 32 PA0_INT0_N 33 PA1_INT1_N 34 PA2_SLOE 35 PA3_WU2 36 PA5_FIFOARD1 38 PA6_PKTEND 39 PA7_FLAGD_SCLS_N 40 GND 41 PA4_FIFOARD0 37 PB2_FD2 7 AVCC PB3_FD3 6 AGND CY7C68013A-56LTXC U4 3V3_USB RESET_N 42 43 44 45 46 47 48 49 50 51 52 53 54 PB4_FD4 3 4 3V3_USB 5 XTALIN 4 XTALOUT 3 AVCC 2 RDY1_SLWR 1 RDY0_SLRD 55 VCC 56 GND CLKOUT C45 0.1µF PD7_FD15 PB5_FD5 P5 1 2 C49 0.1µF 2 PD6_FD14 PB0_FD0 GND R62 100kΩ PD5_FD13 3V3_USB PD3_FD11 PD4_FD12 GND C51 22pF PD2_FD10 VCC C48 10pF 4 1 PD1_FD9 VCC PD0_FD8 PB1_FD1 WAKEUP PB7_FD7 VCC PB6_FD6 Rev. B | Page 26 of 36 GND 5V_USB C54 22pF 3 Y1 24MHz 5 6 7 8 R64 100kΩ DGND C47 1.0µF CR2 R61 2kΩ C58 0.1µF CR1 R65 2kΩ 5V_USB 3V3_USB DATA CLK LE ADRF6807 Data Sheet 09993-144 Data Sheet ADRF6807 The package for the ADRF6807 features an exposed paddle on the underside that should be well soldered to an exposed opening in the solder mask on the evaluation board. Figure 45 illustrates the dimensions used in the layout of the ADRF6807 footprint on the ADRF6807 evaluation board (1 mil = 0.0254 mm). Note the use of nine via holes on the exposed paddle. These ground vias should be connected to all other ground layers on the evaluation board to maximize heat dissipation from the device package. Under these conditions, the thermal impedance of the ADRF6807 was measured to be approximately 30°C/W in still air. 09993-044 0.012 0.035 0.050 Figure 46. ADRF6807 Evaluation Board Top Layer 0.168 0.177 0.232 09993-043 0.020 09993-045 0.025 Figure 45. Evaluation Board Layout Dimensions for the ADRF6807 Package Rev. B | Page 27 of 36 Figure 47. ADRF6807 Evaluation Board Bottom Layer ADRF6807 Data Sheet Table 7. Evaluation Board Configuration Options Component VCC, VCC2, VCC_LDO, VCC_LO, VCC_LO1, VCC_RF, VCC_BB1, 3P3V1, 3P3V2, 3P3V_FORCE, 2P5V, CLK, DATA, LE, CP, DIG_GND, GND, GND1, GND2 Function Power supply, ground and other test points. Connect a 5 V supply to VCC. Connect a 3.3 V supply to 3P3V_FORCE. R1, R6, R7, R8, R13, R14, R15, R17, R18, R24, R25, R27, R28, R29, R31, R32, R34, R36, R49 Power supply decoupling. Shorts or power supply decoupling resistors. C1, C2, C3, C4, C7, C8, C9, C10, C11, C12, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26, C27, C28, C35, C36, C37, C40 The capacitors provide the required decoupling of the supply-related pins. T1, C5, C6 External LO path. The T1 transformer provides single-ended-to-differential conversion. C5 and C6 provide the necessary ac coupling. REFIN input path. R26 provides a broadband 50 Ω termination followed by C31, which provides the ac coupling into REFIN. R16 provides an external connectivity to the MUXOUT feature described in Register 4. R58 provides option for connectivity to the P1-6 line of a 9-pin D-sub connector for dc measurements. Loop filter component options. A variety of loop filter topologies is supported using component placements, C13, C14, C15, R9, and R10. R38 and R59 provide connectivity options to numerous test points for engineering evaluation purposes. R2 provides resistor programmability of the charge pump current (see the Register 4—Charge Pump, PFD, and Reference Path Control section). R37 connects the charge pump output to the loop filter. R12 references the loop filter to the VCO_LDO. IF I/Q output paths. The T2 and T3 baluns provide a 9:1 impedance transformation; therefore, with a 50 Ω load on the single-ended IOUT/QOUT side, the center tap side of the balun presents a differential 450 Ω to the ADRF6807. The center taps of the baluns are ac grounded through C29 and C30. The baluns create a differential-to-single-ended conversion for ease of testing and use, but an option to have straight differential outputs is achieved by populating R3, R39, R23, and R42 with 0 Ω resistors and removing R4, R5, R21, and R22. P2 and P3 are differential measurement test points (not to be used as jumpers). RF input interface. T4 provides the single-endedto-differential conversion required to drive RFIP and RFIN. T4 provides a 2:1 impedance transformation. A single-ended 50 Ω load on the RFIN SMA connector transforms to a differential 100 Ω presented across the RFIP (Pin 25) and RFIN (Pin 26) pins. C38 and C39 are ac coupling capacitors. R16, R26, R58, C31 R2, R9, R10, R11, R12, R37, R38, R59, C14, C15, C13 R3, R4, R5, R21, R22, R23, R39, R40, R41, R42, R43, R44, R45, R46, R47, R48, C29, C30, T2, T3, P2, P3 C38, C39, T4 Rev. B | Page 28 of 36 Default Condition VCC, VCC2, VCC_LO, VCC_RF, VCC_BB1, VCC_LO1, VCO_LDO, 3P3V1, 3P3V2, 2P5V = Components Corporation TP-104-01-02, CP, LE, CLK, DATA, 3P3V_FORCE = Components Corporation TP-104-01-06, GND, GND1, GND2, DIG_GND = Components Corporation TP-104-01-00 R1, R6, R7, R8 = 0 Ω (0402), R13, R14, R15, R17 = 0 Ω (0402), R18, R24, R25, R27 = 0 Ω (0402), R28, R29, R31, R32 = 0 Ω (0402), R34, R36 = 0 Ω (0402), R49 = open (0402) C1, C8, C10, C12 = 100 pF (0402), C16, C18, C21, C22 = 100 pF (0402), C24, C26 = 100 pF (0402), C2, C7, C9, C11 = 0.1 μF (0402), C17, C19, C20, C23 = 0.1 μF (0402), C25, C40 = 0.1 μF (0402), C3, C4, C27, C35 = 10 μF (0603), C36, C37 = 10 μF (0603), C28 = 10 μF (3216) C5, C6 = 1 nF (0603), T1 = TC1-1-13+ Mini-Circuits R26 = 49.9 Ω (0402), R16 = 0 Ω (0402), R58 = open (0402), C31 = 1 nF (0603) R12, R37, R38 = 0 Ω (0402), R59 = open (0402), R9 = 5.6 kΩ (0402), R10 = 1.6 kΩ (0402), R2, R11 = open (0402), C13 = 62 pF (0402), C14 = 300 pF (0402), C15 = 6.2 nF (1206) R4, R5, R21, R22, = 0 Ω (0402), R40, R43, R45, R46 = 0 Ω (0402), R47, R48 = 0 Ω (0402), R3, R23, R39, R41, R42, R44 = open (0402), C29, C30, = 0.1 μF (0402), T2, T3 = TCM9-1+ Mini-Circuits, P2, P3 = Samtec SSW-102-01-G-S C38, C39 = 1000 pF (0402), T4 = ADTL2-18+ Mini-Circuits Data Sheet Component R50, R51, R52, C32, C33, C34 R33, R55, R56, S1 J1, P1, R62, R63 U2, U3, U4, P5 C41, C42, C43, C44, C46, C53, C55 C48, C49, C45, C56, C57, C58, R19, R60, R61, R62, R64, CR2 ADRF6807 Function Serial port interface. Optional RC filters can be installed on the CLK, DATA, and LE lines to filter the PC signals through R50 to R52 and C32 to C34. CLK, DATA, and LE signals can be observed via test points for debug purposes. LO select interface. The LOSEL pin, in combination with the LDRV and LXL bits in Register 5, controls whether the LOP and LON pins operate as inputs or outputs. A detailed description of how the LOSEL pin, LDRV bit, and the LXL bit work together to control the LOP and LON pins is found in Table 4 under the LOSEL pin description. Using the S1 switch, the user can pull LOSEL to a logic high (VCC/2) or a logic low (ground). Resistors R55 and R56 form a resistor divider to provide a logic high of VCC/2. LO select can also be controlled through Pin 9 of J1. The 0 Ω jumper, R33, must be installed to control LOSEL via J1. Engineering test points and external control. J1 is a 10-pin connector connected to various important points on the evaluation board that the user can measure or force voltages upon. R62 and R63 form a voltage divider to force a voltage of 1.65 V on VOCM. Note that Jumper P5 must be connected to drive VOCM with the resistor divider. Cypress microcontroller, EEPROM and LDO. 3.3 V supply decoupling. Several capacitors are used for decoupling on the 3.3 V supply. Cypress and EEPROM components. C47, C50, C52, R65, R69, R70, CR1 LDO components. Y1, C51, C54 Crystal oscillator and components. 24 MHz crystal oscillator. Rev. B | Page 29 of 36 Default Condition R50, R51, R52 = open (0402), C32, C33, C34 = open (0402) R33 = 0 Ω (0402), R55, R56 = 10 kΩ (0402), S1 = Samtec TSW-103-08-G-S R62 = R63 = 4.99 kΩ (0402), P1 = Samtec SSW-102-01-G-S, J1 = Molex Connector Corp. 10-89-7102 U2 = Microchip MICRO24LC64 U3 = Analog Devices ADP3334ACPZ U4 = Cypress Semiconductor CY7C68013A-56LTXC P5 = Mini USB connector C41, C42, C43, C44, C46, C53, C55 = 0.1 μF (0402) C48, C56 = 10 pF (0402) C45, C49, C57, C58 = 0.1 μF (0402) R19, R60, R61 = 2 kΩ (0402) R62, R64 = 100 kΩ (0402) CR2 = ROHM SML-21OMTT86 C47, C52 = 1 μF (0402) C50 = 1000 pF (0402) R65 = 2 kΩ (0402) R69 = 78.7 kΩ (0402) R70 = 140 kΩ (0402) CR1 = ROHM SML-21OMTT86 Y1 = NDK NX3225SA-24 MHz C51, C54 = 22 pF (0402) ADRF6807 Data Sheet ADRF6807 SOFTWARE The ADRF6807 evaluation board can be controlled from PCs using a USB adapter board, which is also available from Analog Devices, Inc. The USB adapter evaluation documentation and ordering information can be found on the EVAL-ADF4XXXZ-USB product page. The basic user interfaces are shown in Figure 48 and Figure 49. 09993-148 The software allows the user to configure the ADRF6807 for various modes of operation. The internal synthesizer is controlled by clicking any of the numeric values listed in RF Section. Attempting to program Ref Input Frequency, PFD Frequency, VCO Frequency (2×LO), LO Frequency, or other values in RF Section launches the Synth Form window shown in Figure 49. Using Synth Form, the user can specify values for Local Oscillator Frequency (MHz) and External Reference Frequency (MHz). The user can also enable the LO output buffer and divider options from this menu. After setting the desired values, it is important to click Upload all registers for the new setting to take effect. Figure 48. Evaluation Board Software Main Window Rev. B | Page 30 of 36 ADRF6807 09993-149 Data Sheet Figure 49. Evaluation Board Software Synth Form Window Rev. B | Page 31 of 36 ADRF6807 Data Sheet CHARACTERIZATION SETUPS Figure 50 to Figure 52 show the general characterization bench setups used extensively for the ADRF6807. The setup shown in Figure 50 was used to perform the bulk of the testing. An automated Agilent VEE program was used to control the equipment over the IEEE bus. This setup was used to measure gain, input P1dB, output P1dB, input IP2, input IP3, IQ gain mismatch, IQ quadrature accuracy, and supply current. The evaluation board was used to perform the characterization with a Mini-Circuits TCM9-1+ balun on each of the I and Q outputs. When using the TCM9-1+ balun below 5 MHz (the specified 1 dB low frequency corner of the balun), distortion performance degrades; however, this is not the ADRF6807 degrading, merely the low frequency corner of the balun introducing distortion effects. Through this balun, the 9-to-1 impedance transformation effectively presented a 450 Ω differential load at each of the I and Q channels. The use of the broadband Mini-Circuits ADTL2-18+ balun on the input provided a differential balanced RF input. The losses of both the input and output baluns were de-embedded from all measurements. To perform phase noise and reference spur measurements, the setup shown in Figure 52 was used. Phase noise was measured at the baseband output (I or Q) at a baseband carrier frequency of 50 MHz. The baseband carrier of 50 MHz was chosen to allow phase noise measurements to be taken at frequencies of up to 20 MHz offset from the carrier. The noise figure was measured using the setup shown in Figure 51 at a baseband frequency of 10 MHz. Rev. B | Page 32 of 36 Data Sheet ADRF6807 IEEE R&S SMA100 SIGNAL GENERATOR IEEE 3dB RF1 R&S SMT03 SIGNAL GENERATOR AGILENT 11636A POWER DIVIDER (USED AS COMBINER) REF 3dB RF2 IEEE MINI CIRCUITS ZHL-42W AMPLIFIER (SUPPLIED WITH +15VDC FOR OPERATION) 3dB 3dB R&S SMT03 SIGNAL GENERATOR RF IEEE CH A RF SWITCH MATRIX CH B HP 8508A VECTOR VOLTMETER IEEE AGILENT MXA SPECTRUM ANALYZER I CH RF Q CH 6dB 3dB 6dB IE EE IEEE AGILENT 34980A MULTIFUNCTION SWITCH (WITH 34950 AND 2× 34921 MODULES) AGILENT DMM (FOR I-5V VP1 MEAS.) IEEE AGILENT E3631A POWER SUPPLY AGILENT DMM (FOR I 3.3V VP2 MEAS.) IEEE IEEE I E IEEE ADRF6807 EVALUATION BOARD 10-PIN CONNECTION (+5V VPOS1, +3.3V VPOS2, DC MEASURE) 6dB 9-PIN D-SUB CONNECTION (VCO AND PLL PROGRAMMING) REF IEEE 09993-048 IEEE Figure 50. General Characterization Setup Rev. B | Page 33 of 36 ADRF6807 Data Sheet IEEE AGILENT 8665B LOW NOISE SYN SIGNAL GENERATOR REF RF1 AGILENT 346B NOISESOURCE 3dB RF RF SWITCH MATRIX 10MHz LOW-PASS FILTER IEEE AGILENT N8974A NOISE FIGURE ANALYZER I CH RF Q CH 6dB 3dB 6dB AGILENT DMM (FOR I-5V VP1 MEAS.) E IEEE AGILENT 34980A MULTIFUNCTION SWITCH (WITH 34950 AND 2× 34921 MODULES) IEEE I E IEEE AGILENT DMM (FOR I 3.3V VP2 MEAS.) IEEE IEEE AGILENT E3631A POWER SUPPLY ADRF6807 EVALUATION BOARD 10-PIN CONNECTION (+5V VPOS1, +3.3V VPOS2, DC MEASURE) 6dB 9-PIN D-SUB CONNECTION (VCO AND PLL PROGRAMMING) REF IEEE 09993-049 IEEE Figure 51. Noise Figure Characterization Setup Rev. B | Page 34 of 36 Data Sheet ADRF6807 IEEE R&S SMA100 SIGNAL GENERATOR IEEE REF RF1 R&S SMA100 SIGNAL GENERATOR IEEE 100MHz LOW-PASS FILTER 3dB AGILENT E5052 SIGNAL SOURCE ANALYZER RF RF SWITCH MATRIX IEEE AGILENT MXA SPECTRUM ANALYZER I CH RF Q CH 6dB 3dB 6dB AGILENT DMM (FOR I-5V VP1 MEAS.) E IEEE AGILENT 34980A MULTIFUNCTION SWITCH (WITH 34950 AND 2× 34921 MODULES) IEEE AGILENT E3631A POWER SUPPLY AGILENT DMM (FOR I 3.3V VP2 MEAS.) IEEE IEEE I E IEEE ADRF6807 EVALUATION BOARD 10-PIN CONNECTION (+5V VPOS1, +3.3V VPOS2, DC MEASURE) 6dB 9-PIN D-SUB CONNECTION (VCO AND PLL PROGRAMMING) REF IEEE 09993-050 IEEE Figure 52. Phase Noise Characterization Setup Rev. B | Page 35 of 36 ADRF6807 Data Sheet OUTLINE DIMENSIONS 6.00 BSC SQ TOP VIEW 5.75 BSC SQ 0.50 BSC 29 28 40 1 4.45 4.30 SQ 4.15 EXPOSED PAD (BOT TOM VIEW) 0.50 0.40 0.30 1.00 0.85 0.80 0.05 MAX 0.02 NOM COPLANARITY 0.08 0.20 REF 0.30 0.23 0.18 SEATING PLANE 11 10 0.25 MIN 4.50 REF 0.80 MAX 0.65 TYP 12° MAX 20 19 PIN 1 INDICATOR FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET. COMPLIANT TO JEDEC STANDARDS MO-220-VJJD-2 122107-A PIN 1 INDICATOR 0.60 MAX 0.60 MAX Figure 53. 40-Lead Lead Frame Chip Scale Package [LFCSP_VQ] 6 mm × 6 mm Body, Very Thin Quad (CP-40-4) Dimensions shown in millimeters ORDERING GUIDE Model 1 ADRF6807ACPZ-R7 ADRF6807-EVALZ 1 Temperature Range −40°C to +85°C Package Description 40-Lead Lead Frame Chip Scale Package [LFCSP_VQ] Evaluation Board Z = RoHS Compliant Part. ©2011–2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09993-0-2/12(B) Rev. B | Page 36 of 36 Package Option CP-40-4 Ordering Quantity 750