SKY74067-21

DATA SHEET SKY74067-21: Dual-Band CDMA2000 Transmitter for Cellular CDMA and PCS Femtocell Applications Applications • Cellular CDMA and PCS femto/pico cell base stations • Cellular CDMA and PCS repeaters Description The SKY74067-21 transmitter is a highly integrated device for dual-band Code Division Multiple Access (CDMA) femtocell base station applications. The SKY74067-21 supports femtocells in the cellular CDMA and Personal Communications System (PCS) bands. The device requires a minimum number of external components to complete a CDMA2000 radio subsystem. Included on-chip are the baseband filter, direct upconversion In-Phase and Quadrature (I/Q) mixers, variable gain power amplifier (PA) drivers, a fully integrated Voltage Controlled Oscillator (VCO) with Local Oscillator (LO) generation blocks, and a dual-mode fractional-N/integer-N Phase Locked Loop (PLL). External components needed for operation include bias resistors, bypass capacitors, and passives to comprise the PLL loop filter. The signal enters the chip as an analog baseband In-Phase and Quadrature (I/Q) signal. It is filtered by the baseband filter and upconverted to the desired RF transmit frequency. The signal is amplified by one of two upconverters, depending on whether the chip is operating in cellular or PCS mode. The resulting signal is fed through the appropriate PA driver stage to provide variable output power and to drive the external PA. The signal is then filtered by an external Surface Acoustic Wave (SAW) filter and sent to the PA to obtain the final rated power. The 32-pin RF Land Grid Array (RFLGA) device package and pinout are shown in Figure 1. Figure 2 shows a functional block diagram for the SKY74067-21. Features • Low power consumption in all operating modes • Direct upconversion architecture • Device controlled using a three-wire read/write serial bus interface with independent supply voltage • Baseband RC filter to reject receive band noise • Fully integrated VCO with auto-tuning • Dual-mode fractional-N/integer-N PLL • Variable gain PA drivers • Differential cellular driver output matched to 200 Ω • Single-ended PCS driver output matched to 50 Ω • Transmit power control with >75 dB dynamic range • Low current consumption at low transmit power minimizes current consumption and noise • Hardware TX_ENABLE for gated mode operation • RFLGA™ (32-pin, 5 x 5 x 1 mm) Pb-free (MSL3, 260 °C per JEDEC J-STD-020) package with downset paddle Skyworks offers lead (Pb)-free, RoHS (Restriction of Hazardous Substances) compliant packaging. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200803A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • April 13, 2009 1 DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER VCC_CLK REF Q+ 27 Q– 32 31 30 29 28 26 25 24 23 22 21 20 19 18 17 LD_OUT VCC_PLL_1 N/C CP VCC_PLL_2 VCO_IO VCO_TUNE VCO_EXT_RES VCO_BYPASS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CS I+ I– BIAS_RES VCC_RF_4 VCC_RF_3 PCS_OUT VCC_RF_2 CELL_OUT– CELL_OUT+ TX_ENABLE VCC_RF_1 VCC_VCO_CORE VCC_INTERFACE VCC_LD CLK LATCH_ENABLE GAIN_CTRL DATA S1157 Figure 1. SKY74067-21 Transmitter Pinout – 32-Pin RFLGA (5 x 5 mm) (Top View) REF LD_OUT Fractional-N/ Integer-N PLL CP 0O Q– Q+ I– I+ PCS_OUT 90 O LO Generation VCO_IO 90O CELL_OUT– Serial I/O Integrated VCO Tank 0O CELL_OUT+ LATCH_ENABLE GAIN_CTRL CLK DATA S347 Figure 2. SKY74067-21 Transmitter Block Diagram Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 2 April 13, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 200803A DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER Technical Description Baseband Filter In voltage mode operation, the baseband section of the SKY74067-21 contains a simple RC filter to reject receive band noise from incoming I and Q signals. VCO, LO Chain, and PLL The VCO has an internal tank circuit automatically tuned to the desired frequency. The VCO is connected to an on-chip PLL and LO generation blocks. The output of the LO generation blocks drives the LO port of the I/Q RF upconverter. A dual-mode fractional-N/integer-N PLL is used to lock the VCO to the desired frequency in cellular mode. A bi-directional buffer is available to measure the VCO output or to enable use of an external LO for testing purposes. I/Q RF Upconverter The I/Q RF upconverter converts the incoming I/Q signal to the desired RF output signal. The upconverter passes the output signal directly to the variable gain PA drivers. The LO for the upconverter is provided by the VCO and LO generation blocks. The upconverter block consists of two separate mixers, one for cellular mode operation and the other for PCS mode. The output of the PCS mixer is routed to the PCS PA driver and the cellular mixer output is routed to the cellular PA driver. Variable Gain PA Drivers The SKY74067-21 includes two PA drivers. These drivers control the power level of the signal provided by the PCS and cellular upconverters. The gain of both drivers is variable, yielding over 75 dB of dynamic range. The PCS driver output is single-ended, while the cellular driver is differential. Both are open collector outputs that require external matching. Serial Bus Interface A three-wire serial bus with read/write capability provides mode and bias control, and control of the PLL. The serial interface consists of three signals: a bus clock (CLK), a bus enable (LATCH_ENABLE), and the serial, bi-directional data line (DATA). 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 SKY74067-21 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. For packaging details, refer to the Skyworks Application Note Tape and Reel, document number 101568. Electrical and Mechanical Specifications Signal pin assignments and functional pin descriptions are described in Table 1. The absolute maximum ratings of the SKY74067-21 are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Table 4. An application schematic diagram for the SKY74067-21 is shown in Figure 3. The package dimensions for the 32-pin RFLGA are shown in Figure 4, and the tape and reel dimensions are provided in Figure 5. Electrostatic Discharge (ESD) Sensitivity The SKY74067-21 is a static-sensitive electronic device. Do not operate or store near strong electrostatic fields. Take proper ESD precautions. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200803A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • April 13, 2009 3 DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER Table 1. SKY74067-21 Signal Descriptions Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 LD_OUT VCC_PLL_1 N/C CP VCC_PLL_2 VCO_IO VCO_TUNE VCO_EXT_RES VCO_BYPASS VCC_VCO_CORE VCC_LO VCC_INTERFACE CLK LATCH_ENABLE DATA GAIN_CTRL Name Description Lock detect output. Open drain. Supply for the PLL. No connection Charge pump output. Supply for the PLL. Input/output port for the VCO bidirectional buffer. Loop filter input for the VCO. External bias-setting resistor for the VCO. External capacitor for VCO noise filtering. Supply for the VCO. Supply for LO generation blocks. Supply for serial bus. Clock signal for serial bus. Latch enable signal for serial bus. Data signal for serial bus. Gain control voltage. Pin # 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Name VCC_RF_1 TX_ENABLE CELL_OUT+ CELL_OUT– VCC_RF_2 PCS_OUT VCC_RF_3 VCC_RF_4 BIAS_RES CS Q+ Q– I+ I– VCC_CLK REF Description Supply for bias circuits of all drivers. Transmit enable/disable pin for all blocks, excluding VCO and PLLs. Positive cellular driver differential output. Negative cellular driver differential output. Supply for PCS and cellular output drivers. PCS driver output. Supply for bias circuits of the PCS differential driver. Supply for the mixer and associated bias blocks. External bias resistor for all blocks, excluding VCO. Current sink. Positive quadrature analog baseband input. Negative quadrature analog baseband input. Positive in-phase analog baseband input. Negative in-phase analog baseband input. Supply for the TCXO buffer. TCXO input. Table 2. SKY74067-21 Absolute Maximum Ratings Parameter Supply voltage Input voltage range Storage temperature Ambient operating temperature Note: Symbol VCC VIN TSTG TA Minimum –0.3 –0.3 –40 –30 Typical Maximum +3.6 VCC +125 +85 Units V V °C °C 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. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 4 April 13, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 200803A DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER Table 3. SKY74067-21 Recommended Operating Conditions Parameter Supply voltage Logic level: high low ZIN of logic control inputs Supply current: Cellular CDMA mode @ 5 dBm PCS mode @ 5 dBm Supply current in sleep mode VCC Symbol Minimum 2.70 VCC – 0.5 0 50 71 76 100 Typical 2.85 Maximum 3.00 VCC 0.5 Units V V V kΩ mA mA µA Table 4. SKY74067-21 Electrical Specifications (1 of 3) (TA = +25 °C, VCC = 2.85 V, CDMA2000 Waveform Used Unless Otherwise Noted) Parameter Baseband Filter Cutoff frequency Amplitude ripple Amplitude imbalance between I and Q chains Phase imbalance between I and Q chains Rejection: @ 45 MHz (cellular CDMA) @ 80 MHz (PCS) I/Q RF Upconverter, Voltage Mode Input signal level Input common mode voltage Input impedance I/Q Upconverter, Current Mode Input signal level Current sink I/Q RF Upconverter and Driver, Cellular CDMA I/Q frequency range –1 dB bandwidth RF output frequency range Maximum RF output power Dynamic range Control voltage range Slope of RF AGC ACPR: 750 kHz offset @ +4 dBm 1.98 MHz offset @ +0 dBm 0.2 30 50 –55 –70 800 0.63 5 880 +5 72 2.7 75 950 2.5 MHz MHz MHz dBm dB V dB/V dBc dBc 20 1 ± 0.6 200 mA µA 1.3 1 1.5 50 1.9 Vp-p differential V kΩ 3 0.5 0.20 1 20 25 0.25 MHz dB dB degrees dB dB Symbol Test Condition Min Typical Max Units Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200803A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • April 13, 2009 5 DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER Table 4. SKY74067-21 Electrical Specifications (2 of 3) (TA = +25 °C, VCC = 2.85 V, CDMA2000 Waveform Used Unless Otherwise Noted) Parameter Symbol Test Condition Min Typical Max Units I/Q RF Upconverter and Driver, Cellular CDMA (continued) Residual sideband suppression Carrier suppression (Note 1) Gain variation over the frequency band Output return loss @ maximum power Receive band noise @ maximum gain, Po = +8 dBm Noise floor @ minimum controlled output power = –81 dBm/1.23 MHz Supply current including LO chain: Current mode @ minimum power Current mode @ –30 dBm Current mode @ +8 dBm Supply current including LO chain: Voltage mode @ minimum power Voltage mode @ –20 dBm Voltage mode @ +8 dBm Settling time for output power to reach ±1 dB of final value I/Q RF Upconverter and Driver, PCS I/Q frequency range –1 dB bandwidth RF output frequency range Maximum RF output power RF dynamic range Control voltage range Slope of RF AGC ACPR: 885 kHz @ +1 dBm 1.25 MHz offset @ +1 dBm 1.98 MHz offset @ +2 dBm Residual sideband suppression Carrier suppression (Note 1) Output return loss @ maximum power Receive band noise @ maximum gain, Po = +5 dBm Noise floor @ minimum controlled output power = –79 dBm/1.23 MHz 0.2 30 50 –52 –55 –70 –35 –35 –12 –134 –165 –160 –35 –32 –10 1700 0.63 5 1960 +5 72 2.7 80 2000 2.5 MHz MHz MHz dBm dB V dB/V dBc dBc dBc dBc dBc dB dBm/Hz dBm/Hz 869 MHz to 895 MHz –38 –35 0.5 –12 –137 –165 –35 –32 1.0 –10 –135 –160 dBc dBc dB dB dBm/Hz dBm/Hz 26 40 60 22 35 60 5 30 46 69 25 40 69 mA mA mA mA mA mA µs Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 6 April 13, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 200803A DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER Table 4. SKY74067-21 Electrical Specifications (3 of 3) (TA = +25 °C, VCC = 2.85 V, CDMA2000 Waveform Used Unless Otherwise Noted) Parameter I/Q RF Upconverter and Driver, PCS (continued) Supply current including LO chain: Current mode @ minimum power Current mode @ –30 dBm Current mode @ +9 dBm Supply current including LO chain: Voltage mode @ minimum power Voltage mode @ –30 dBm Voltage mode @ +5 dBm Settling time for output power to reach ±1 dB of final value VCO/PLL in Cellular CDMA Mode Phase noise: @ 100 kHz offset @ 885 kHz offset @ 1.98 MHz offset Total supply current Fractional-N PLL Reference range Reference input sensitivity Charge pump current, RF (sel 1) Charge pump current, RF (sel 2) Charge pump current, RF (sel 3) Charge pump current, RF (sel 4) Charge pump leakage current PLL phase noise integrated from 1 kHz to 630 kHz at carrier: Cellular CDMA (FCOMP = 9.6 MHz) PCS (FCOMP = 9.6 MHz) Supply current Integer-N PLL Input frequency minimum range Reference range Phase detector frequency minimum range Reference input sensitivity Charge pump current, RF (sel 1) Charge pump current, RF (sel 2) Charge pump current, RF (sel 3) Charge pump current, RF (sel 4) Charge pump output voltage compliance, minimum range Supply current Note 1: Minimum of –20 dBc at minimum power. Symbol Test Condition Min Typical Max Units 23 40 64 19 40 66 5 26 46 72 23 46 76 mA mA mA mA mA mA µs –100 –120 –130 5.5 –95 –110 –120 dBc/Hz dBc/Hz dBc/Hz mA 1.0 200 0.032 0.08 0.16 0.32 19.2 500 0.040 0.10 0.20 0.40 40.0 MHz mVp-p 0.048 0.12 0.24 0.48 0.10 mA mA mA mA nA Unity gain loop bandwidth = 25 kHz 2 2 4 degrees rms degrees rms mA 500 1.0 10 200 0.22 0.56 1.12 2.24 0.5 3.5 500 0.28 0.70 1.40 2.80 19.2 2500 40.0 1000 MHz MHz kHz mVp-p 0.34 0.84 1.68 3.36 VDD – 0.5 mA mA mA mA V mA Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200803A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • April 13, 2009 7 I– Q– CS REF Q+ PLL_VCC I+ LD_OUT 2 VCC_CLK GND N/C PCS_OUT 22 VCC_RF_3 C2 8.2 pF L2 15 nH 2 4 4 GND GND GND VCO_TUNE VCO_EXT_RES VCO_BYPASS CELL_OUT+ In– R6 1.5 kΩ 8 C4 33 pF 1 3 5 C22 470 pF 9 L3 15 nH GND VCC_VCO_CORE VCC_LD VCC_INTERFACE CLK LATCH_ENABLE DATA GAIN_CTRL 8 TX_Q– C9 330 pF R3 10 Ω C13 100 pF C8 330 pF TX_I+ TX_I– TX_Q+ CURRENT_SINK TCXO R20 10 kΩ 32 31 30 29 28 27 26 BIAS_RES 25 R2 30 kΩ L1 12 nH 1 LD_OUT VCC_PLL_1 23 DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER TX_VCC PLL_VCC C1 1 nF C15 33 pF R1 5.1 Ω VCC_RF_4 24 PCS RF SAW 1 In Out 3 × 3 PCS_OUT CP VCC_PLL_2 VCO_IO TX_VCC 21 20 19 C20 470 pF 5 X 7 6 SKY74067 VCC_RF_2 CELL_OUT– C3 33 pF 6 4 R8 2.2 kΩ Cellular RF SAW In+ Out 2 CELL_OUT TX_VCC TX_ENABLE VCC_RF_1 18 17 C18 10 nF PA_ON TX_VCC C7 8.2 pF C6 33 pF C5 0.1 μF Figure 3. SKY74067-21 Application Schematic 10 11 12 13 14 15 16 PLL_VCC C17 1 nF R4 5.1 Ω C14 1 nF R5 10 Ω C10 0.33 μF TX_AGC DATA LE INTERFACE_VCC C12 1 nF C11 100 pF CLK S1210 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com April 13, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 200803A DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER 5.04 ± 0.05 Pin #1 Solder Mask ∅0.300 ∅0.150 Pin #1 Mark Downset Paddle 0.500 5.04 ± 0.05 0.500 Detail A ∅2.000 Top View Bottom View Solder Mask Exposed Metal 1.00 ± 0.10 0.38 ± 0.05 (32x) Side View All measurements are in millimeters 0.300 ± 0.02 (32x) 0.050 Ref. Package Edge 0.400 ± 0.05 (32x) Detail A C1285a Figure 4. SKY74067-21 32-Pin RFLGA Package Dimension Drawing 8.00 ± 0.02 ∅1.55 ± 0.05 0.30 ± 0.05 4.00 ± 0.02 2.00 ± 0.05 B Pin #1 Indicator 1.75 ± 0.10 5.50 ± 0.05 A 5.35 A 5o Max. 1.70 B ∅1.50 Min. 5.35 B Notes: 1. Carrier tape: black conductive polystyrene 2. Cover tape material: transparent conductive PSA 3. Cover tape size: 9.3 mm width 4. All dimensions are in millimeters 5o Max. A S461 Figure 5. SKY74067-21 Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200803A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • April 13, 2009 9 12.00 ± 0.30 DATA SHEET • SKY74067-21 CDMA2000 TRANSMITTER Ordering Information Model Name SKY74067-21 CDMA2000 Transmitter Manufacturing Part Number SKY74067-21 (Pb-free package) Evaluation Kit Part Number TW17-D215-001 Copyright © 2009 Skyworks Solutions, Inc. All Rights Reserved. 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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 10 April 13, 2009 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 200803A