DATA SHEET SKY74100-21: Dual-Band Receiver for CDMA and PCS Femtocell Applications Applications Description Dual-band femtocells The SKY74100-21 receiver is a highly integrated device for dualband Code Division Multiple Access (CDMA) femtocells. The SKY74100-21 supports femtocells in the cellular CDMA and Personal Communications System (PCS) modes. Features Supply voltage: 2.7 V to 3.0 V Low power operation: 140 mW with supply voltage @ 2.85 V Two differential mixer path inputs (800 MHz and 1.9 GHz) and common I/Q differential outputs at the baseband Two direct downconverters for CDMA and PCS bands Fully integrated UHF VCO for all operating modes. An automatic integrated tuning loop for all process variations is included Fully integrated RF PLL (except for the loop filter) Fully integrated baseband low pass filters for both I and Q channels Internal automatic tuning loop to cover all process variations for integrated filters Integrated DCOC, requiring no external stimulus or components LGA (40-pin, 6 x 6 x 1 mm) package with downset paddle (MSL3, 260 C per JEDEC J-STD-020) Skyworks offers lead (Pb)-free RoHS (Restriction of Hazardous Substances) compliant packaging. The device requires a minimum number of external components to complete a CDMA radio subsystem. Included within the package are the downconverters, baseband filters with an autotuning loop, UHF Voltage Controlled Oscillator (VCO), RF Phase Locked Loop (PLL), and DC Offset Correction (DCOC). The SKY74100-21 is designed to operate within a supply voltage range of 2.7 V to 3.0 V. External components needed for operation include matching networks for differential mixer inputs, CDMA/PCS Surface Acoustic Wave (SAW) filters, three bias resistors for accurate bias control over process variation, and two high tolerance load resistors for In-Phase and Quadrature (I/Q) baseband output. The SKY74100-21 output is a dual-channel, fully differential analog signal at the baseband. Both channels maintain a quadrature phase relationship with each other. Together with the SKY74092 dual-band, dual-mode LNA, the SKY74100-21 completes the receiver from the RF input to the I/Q baseband outputs. The 40-pin Land Grid Array (LGA) device package and pinout are shown in Figure 1. Figure 2 shows a functional block diagram for the SKY74100-21. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200762C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 22, 2010 1 VCC_UHF_PLL CP_OUT LPFILT_CTRL LD_OUT VCC_DIG 39 BIDIRECTIONAL_LO VCC_VCO 40 VCO_TUNE VCC_DIV DATA SHEET • SKY74100-21 CDMA RECEIVER 38 37 36 35 34 33 32 VCO_BYPASS 1 31 VCC_CLK VCO_BIAS_RES 2 30 REF_CLK PLL_BIAS_RES 26 CLK_AUX CELL_MIX_IN– 7 25 LE_RX VCC_RF_BIAS 8 24 DATA_RX RF_RES_BIAS 9 23 CLK_RX N/C 10 22 I_OUT+ N/C 11 21 I_OUT– 12 13 14 15 16 17 18 19 20 Q_OUT– 6 Q_OUT+ DATA_AUX CELL_MIX_IN+ Q_OFFSET 27 I_OFFSET 5 FILT_TUNE_MUX LE_AUX VCC_MIX VCC_BB2 28 VCC_BB 4 N/C 3 PCS_MIX_IN+ MIX_GAINSTEP PCS_MIX_IN– 29 S1156 38 LPFILT_CTRL VCO_TUNE BIDIRECTIONAL_LO Figure 1. SKY74100-21 Receiver Pinout – 40-Pin LGA (6 x 6 mm) (Top View) 37 37 RF PLL PCS_MIX_IN– ÷2 PCS_MIX_IN+ Serial Peripheral Interface 1 3 Auto-Tuning Blocks 4 Serial Peripheral Interface 2 I-Channel Baseband CELL_MIX_IN+ 6 ÷4 CELL_MIX_IN– 7 Baseband Bias 22 RF Bias 21 I_OUT+ I_OUT– Q-Channel Baseband Q_OUT– 20 Q_OUT+ 19 S342 Figure 2. SKY74100-21 Receiver Block Diagram Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 2 July 22, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200762C DATA SHEET • SKY74100-21 CDMA RECEIVER Technical Description LNAs Due to noise and isolation considerations, the CDMA and PCS LNAs are contained on the SKY74092 (refer to the device Data Sheet, document number 103205, for further information). Mixers Two mixers with separate differential inputs accommodate CDMA and PCS modes of operation. frequency can be adjusted from 640 Hz to 1.91 kHz using the Auxiliary serial bus. RF PLL The RF PLL is fully integrated with the exception of the loop filter components. The pre-scalar has been designed to directly use the VCO frequency to maintain resolution without impacting settling time. A power on reset signal is generated on start-up. This is used to reset all flip-flops in the PLL and as a reference to enable on-chip tuning sequences. Serial Bus Interface The SKY74100-21 has two read/write, three-wire serial bus interfaces (Auxiliary and Receive). The Auxiliary bus is used for writing to and reading from the UHF VCO and PLL. The Receive bus is used for writing to and reading from the receive path. The Receive bus is shared with the SKY74092 LNA. Fully Integrated VCO The VCO is designed to operate at twice the frequency of the PCS receive band and four times the frequency of the CDMA receive band. The carrier frequency and quadrature are then achieved by dividing the VCO signal by either two or four. The analog tuning range is sufficient to cover frequency variations due to supply and temperature changes under normal operating conditions. This ensures that the PLL is always locked. Continuous Time Low Pass Filters The receive filter has two primary tasks: to set the receive bandwidth, and to reject adjacent and alternate channel blockers. These functions are formalized by the requirements placed on the 900 kHz and 1.25 MHz blockers for the cellular and PCS bands, respectively, with further attenuation requirements at 1.7 MHz and 2.05 MHz. There are two identical receive filters, one for the I channel and one for the Q channel. A 15 dB gain step is provided in the filter, programmed either through the three-wire bus or through the MIX_GAINSTEP signal (pin 13). DC Offset Correction (DCOC) Package and Handling Information Since the device package is sensitive to moisture absorption, it is baked and vacuum packed before shipping. Instructions on the shipping container label regarding exposure to moisture after the container seal is broken must be followed. Otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. The SKY74100-21 is rated to Moisture Sensitivity Level 3 (MSL3) at 260 C. It can be used for lead or lead-free soldering. For additional information, refer to the Skyworks Application Note, PCB Design & SMT Assembly/Rework Guidelines for RFLGA Packages, document number 103147. Care must be taken when attaching this product, whether it is done manually or in a production solder reflow environment. Production quantities of this product are shipped in a standard tape and reel format. Electrical and Mechanical Specifications Signal pin assignments and functional pin descriptions are described in Table 1. The absolute maximum ratings of the SKY74100-21 are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Tables 4 through 7. An application schematic diagram for the SKY74100-21 is shown in Figure 3. A PCB footprint drawing is provided in Figure 4, package dimensions for the 40-pin LGA are shown in Figure 5, and the tape and reel dimensions are provided in Figure 6. DCOC is provided as part of the baseband filter transfer function. A high pass cut-off is provided in the signal path. No external components are required. However, the high pass cut-off Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200762C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 22, 2010 3 DATA SHEET • SKY74100-21 CDMA RECEIVER Table 1. SKY74100-21 Signal Descriptions Pin # Name Description Pin # Name Description 1 VCO_BYPASS External bypass capacitor for VCO bias. 21 I_OUT– Negative I channel baseband output. Requires a shunt load resistor of 5 k shared with pin 22. 2 VCO_BIAS_RES External resistor to set VCO bias. 22 I_OUT+ Positive I channel baseband output. Shunt load shared with pin 21. 3 PCS_MIX_IN– Negative RF input for PCS mixer. Requires external match. 23 CLK_RX Clock for receive serial I/O. 4 PCS_MIX_IN+ Positive RF input for PCS mixer. Requires external match. 24 DATA_RX Data for receive serial I/O. 5 VCC_MIX Supply for RF mixer bias. 25 LE_RX Latch enable for receive serial I/O. 6 CELL_MIX_IN+ Positive RF input for CDMA mixer. Requires external match. 26 CLK_AUX Clock for auxiliary serial I/O. 7 CELL_MIX_IN– Negative RF input for CDMA mixer. Requires external match. 27 DATA_AUX Data for auxiliary serial I/O. 8 VCC_RF_BIAS Supply for RF bias block. 28 LE_AUX Latch enable for auxiliary serial I/O. 9 RF_RES_BIAS External resistor to set RF bias for LNA and mixers. 29 PLL_BIAS_RES External resistor for PLL bias.. 10 N/C No connection 30 REF_CLK Reference clock input (TCXO). 11 N/C No connection 31 VCC_CLK Supply for TCXO reference buffer. 12 N/C No connection 32 VCC_DIG Digital supply. 13 MIX_GAINSTEP Control pin used to switch the mixer and baseband gain. 33 LD_OUT Lock detect output for PLL. This is an open drain output. Requires a 10 k pullup for VCC. 14 VCC_BB Supply for baseband block. 34 LPFILT_CTRL Provides a bit from internal serial I/O to switch between external loop filter components. This is an open drain output. 15 VCC_BB2 Supply for baseband. 35 CP_OUT Charge pump output. Connected to external loop filter. 16 FILT_TUNE_MIX Ground 36 VCC_UHF_PLL Supply for RF PLL. 17 I_OFFSET No connection 37 VCO_TUNE VCO tuning voltage. Tuning range is 0.5 V to 2.5 V. 18 Q_OFFSET No connection 38 BIDIRECTIONAL_LO No connection 19 Q_OUT+ Positive Q channel baseband output. Requires a 5 k shunt load resistor shared with pin 20. 39 VCC_VCO Supply for VCO core. 20 Q_OUT– Negative Q channel baseband output. Shunt load shared with pin 19. 40 VCC_DIV Supply for LO dividers. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 July 22, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200762C DATA SHEET • SKY74100-21 CDMA RECEIVER Table 2. SKY74100-21 Absolute Maximum Ratings Parameter Symbol Minimum Typical Maximum Units V Supply voltage VCC –0.3 +3.6 Input voltage range VIN –0.3 VCC V +5 dBm LNA input power Power dissipation 600 mW Storage temperature TSTG –40 +125 C Ambient operating temperature TA –30 +85 C Note: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set at or below their nominal value. CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times. Table 3. SKY74100-21 Recommended Operating Conditions Minimum Typical Maximum Units Supply voltage Parameter VCC Symbol 2.7 2.85 3.0 V Operating temperature range TA –30 +25 +85 C ZIN of logic control inputs 50 k Logic level high VCC – 0.5 VCC V Logic level low 0 0.5 V Table 4. SKY74100-21 Electrical Specifications (Note 1) (1 of 2) (TA = +25 C, VCC = 2.85 V Unless Otherwise Noted) Parameter Symbol Test Condition Min Typical Max Units 0.65 MHz CDMA 800 MHz Downconverter and Filter – High Gain Mode Output frequency range 0 Voltage gain 49 Noise figure NF Third Order Input Intercept Point IIP3 Second Order Input Intercept Point IIP2 P1dB @ input dB Mixer and filters 13.5 3 High gain dB dBm 40 dBm –15 dBm RF input impedance (differential) 100 RF input return loss (differential) –10 dB LO leakage at mixer input –68 dBm Total supply current (adjustable) 70 mA CDMA 800 MHz Downconverter and Filter – Low Gain Mode Gain step 15 P1dB @ input Low gain LO leakage @ mixer input 17 –15 dB dBm –68 dBm Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200762C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 22, 2010 5 DATA SHEET • SKY74100-21 CDMA RECEIVER Table 4. SKY74100-21 Electrical Specifications (Note 1) (2 of 2) (TA = +25 C, VCC = 2.85 V Unless Otherwise Noted) Parameter Symbol Test Condition Min Typical Max Units 0.65 MHz PCS 1900 MHz Downconverter and Filter – High Gain Mode Output frequency range 0 Voltage gain 49 Noise figure NF Mixer and filters dB 10.0 13.5 dB Third Order Input Intercept Point IIP3 2 dBm Mixer Second Order Input Intercept Point IIP2 40 dBm –15 dBm P1dB @ input High gain RF input impedance (differential) 100 RF input return loss (differential) –10 dB LO leakage at mixer input –72 dBm Total supply current (adjustable) 64 mA 17 dB –72 dBm Max Units 3576 3980 MHz MHz @ VCO frequency integrated at 900 630 kHz offset –63 dBc @ carrier frequency integrated at 900 630 kHz offset –75 dBc @ VCO frequency integrated at 1250 630 kHz offset –67 dBc @ carrier frequency integrated at 1250 630 kHz offset –73 dBc 19 mA PCS 1900 MHz Downconverter and Filter – Low Gain Mode Gain step 15 P1dB @ input Low gain –15 dBm LO leakage @ mixer input Note 1: Performance is guaranteed only under the conditions listed in this Table. Table 5. SKY74100-21 UHF VCO Specifications (Note 1) (TA = +25 C, VCC = 2.85 V Unless Otherwise Noted) Parameter Symbol Test Condition VCO frequency: CDMA PCS Min 3298 3702 Phase noise, CDMA Phase noise, PCS Current consumption (PCS/CDMA) Typical Note 1: Performance is guaranteed only under the conditions listed in this Table. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 July 22, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200762C DATA SHEET • SKY74100-21 CDMA RECEIVER Table 6. SKY74100-21 PLL Specifications (Note 1) (TA = +25 C, VCC = 2.85 V Unless Otherwise Noted) Parameter Symbol Test Condition Min Reference range Typical Max 19.2 Phase detector frequency minimum range 10 Reference input sensitivity 300 Charge pump current: RF (sel 1) RF (sel 2) RF (sel 3) RF (sel 4) MHz 1000 0.5 PLL phase noise: integrated from 1 kHz to 630 kHz at carrier CDMA, FCOMP = 120 kHz PCS, FCOMP = 100 kHz kHz mVp-p mA mA mA mA 0.8 1.5 2.7 3.6 Charge pump output voltage compliance, minimum range Units VDD – 0.5 2.5 Supply current V degrees rms (Note 2) 6 mA Max Units Note 1: Performance is guaranteed only under the conditions listed in this Table. Note 2: Equivalent to –27 dBc. Table 7. SKY74100-21 Output Interface Specifications (Note 1) (TA = +25 C, VCC = 2.85 V Unless Otherwise Noted) Parameter Symbol Test Condition Min Typical Nominal CDMA and PCS output signal level Input level = –100 dBm Input level = –113 dBm Output common mode voltage DC offset at CDMA and PCS output –57 –56 dBV dBV VCC/2 V 15 Blocker rejection @ CDMA and PCS output Blocker frequency from carrier 900 kHz Inband ripple CDMA and PCS (peak-to-peak) 10 kHz < frequency offset < 615 kHz I/Q amplitude imbalance I/Q phase imbalance 40 mV dB 1.5 dB 0.5 dB 3 degrees Note 1: Performance is guaranteed only under the conditions listed in this Table. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200762C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 22, 2010 7 July 22, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200762C VCC Baseband Receive Mixer Gain 1 In B7838 In 2 2 C30 33 pF 5 C27 33 pF 5 3 Out– Out+ 4 3 Out– 4 Out+ C32 2.2 pF C31 DNI C28 2.2 pF C25 1 pF C23 1 μF L10 2.2 nH L9 2.2 nH L8 2.2 nH L7 2.2 nH R19 39 kΩ R16 15 kΩ X VCC RF Receive PLL RF SAW VCC RF Receive PCS RF SAW 1 B7834 GND GND C20 1 pF C18 1 μF 9 8 7 6 5 4 3 2 1 11 10 C21 1 nF C42 1 μF C41 1000 pF N/C N/C RF_RES_BIAS VCC_RF_BIAS CELL_MIX_IN– CELL_MIX_IN+ VCC_MIX PCS_MIX_IN+ PCS_MIX_IN– 12 VCO_BIAS_RES VCO_BYPASS 40 VCC_DIV X N/C VCC Baseband Receive 13 39 VCC_VCO MIX_GAINSTEP C15 33 pF 37 36 35 R7 24 kΩ 34 14 15 16 17 X 18 SKY74100-21 38 BIDIRECTIONAL_LO VCC_BB VCC PLL Receive VCO_TUNE VCC_BB2 X 19 33 C12 3.9 nF LPFILT_CTRL Q_OFFSET C13 220 pF VCC_UHF_PLL FILT_TUNE_MUX GND GND CP_OUT I_OFFSET 20 32 C14 220 pF REF_CLK VCC_CLK I_OUT– I_OUT+ CLK_RX DATA_RX LE_RX CLK_AUX DATA_AUX LE_AUX PLL_BIAS_RES VCC_DIG R6 10 kΩ LD_OUT Q_OUT+ 8 Q_OUT– R24 51 Ω 21 22 23 24 25 26 27 28 29 30 31 R22 5.1 kΩ R23 100 kΩ R20 5.1 kΩ R17 24 kΩ C19 1 μF + C17 4.7 μF S1154 Positive Quadrature Negative Quadrature Negative In-Phase Positive In-Phase Clock Data Latch Enable Auxiliary Clock Auxiliary Data Auxiliary Latch Enable TCXO VCC Receive Digital Lock Detect VCC PLL Receive DATA SHEET • SKY74100-21 CDMA RECEIVER X Figure 3. SKY74100-21 Application Schematic Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com DATA SHEET • SKY74100-21 CDMA RECEIVER Stencil aperture 50% of exposed solder mask opening center pad 0.77 2.50 6.04 2.27 0.77 0.30 0.30 2.50 2.50 6.04 6.04 0.50 pitch 0.60 pitch 2.27 0.50 pitch Component Outline Component Outline 6.04 Stencil Aperture Top View (Approach 1) Stencil aperture grid area = 50% of exposed solder mask opening center pad with 0.25 – 0.30 mm web Metallization Top View 0.77 2.50 Thermal Via Array under ground pad areas. ∅0.3 mm on 0.6 mm pitch. Additional vias will improve thermal performance. NOTE: thermal vias should be tented and filled with solder mask, 30-35 μm Cu plating recommended. 0.60 pitch 6.04 2.45 0.30 0.50 pitch 2.45 2.50 6.04 6.04 0.50 pitch 0.50 pitch 0.50 Component Outline All measurements are in millimeters 6.04 Stencil Aperture Top View (Approach 2) Component Outline 0.87 Solder Mask Opening Top View S671 Figure 4. Phone Board Layout Footprint For The SKY74100-21 6 x 6 LGA Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200762C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 22, 2010 9 DATA SHEET • SKY74100-21 CDMA RECEIVER 6.04 ± 0.10 Solder Mask Pin 1 Indicator Pin 1 Indicator 0.500 Exposed Metal R1.500 6.04 ± 0.10 0.30 ± 0.05 Detail A 0.38 ± 0.08 Top View Bottom View Solder Mask Exposed Metal 0.38 ±0.05 Package Edge 1.00 ± 0.10 0.040 Ref 0.30 ±0.020 0.40 ±0.050 Side View Detail A S311 All dimensions are in millimeters Figure 5. SKY74100-21 40-Pin LGA Package Dimension Drawing ∅1.50 ± 0.10 0.25 ± 0.02 (T) 4.00 ± 0.10 2.00 ± 0.10 1.75 ± 0.10 6.35 ± 0.10 (Bo) A A B 1.30 ± 0.10 (Ko) 12.00 ± 0.20 B 5.50 ± 0.10 Pin #1 Indicator (see Notes) ∅1.55 ± 0.05 8.00 ± 0.10 B 6.35 ± 0.10 (Ao) Notes: 1. Carrier tape: black conductive polycarbonate 2. Cover tape material: transparent conductive PSA 3. Cover tape size: 9.3 mm width 4. All dimensions are in millimeters 5. Pin 1 orientation is in top left corner for the following Skyworks products: A SKY73022-21, -31 SKY73023-21, -31 For all other 6 x 6 mm MCM/RFLGA products, pin 1 orientation is in top right corner. S1850 Figure 6. SKY74100-21 Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 10 July 22, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200762C DATA SHEET • SKY74100-21 CDMA RECEIVER Ordering Information Model Name SKY74100-21 CDMA Receiver Manufacturing Part Number SKY74100-21 Evaluation Board Part Number *** TBD *** Copyright © 2007, 2008, 2010 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. 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Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200762C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 22, 2010 11