DATA SHEET SKY74092-11: Dual-Band LNA for CDMA, Femtocell, and PCS Mobile Handset Applications Applications Description Femtocell systems The SKY74092-11 is a dual-band Low Noise Amplifier (LNA) intended for use in Code Division Multiple Access (CDMA) portable phones in both cellular and Personal Communications Service (PCS) bands. The device provides low noise amplification with high linearity to achieve high dynamic range. PCS band IS95/IS2000 LNA with four gain steps and programmable current Three-wire serial bus for device programming LGA (16-pin, 3 x 3 x 1 mm) package (MSL3, 260 C per JEDEC J-STD-020) The device package and pinout for the 16-pin LGA are shown in Figure 1 and a block diagram of the SKY74092-11 is shown in Figure 2. Skyworks offers lead (Pb)-free RoHS (Restriction of Hazardous Substances) compliant packaging. PCS_LNA_IN Four-step gain control for CDMA and PCS bands Different modes, currents, and gain steps of low noise amplification are controlled by a serial three-wire bus interface. The device requires external supply filtering capacitors, one bias resistor, and various external components to match input and output impedance to 50 . The SKY74092-11 is provided in a 3 x 3 mm Land Grid Array (LGA) package. 16 15 14 LNA_RANGE0 1 13 N/C LNA_RANGE1 2 12 VCC_BIAS CLK 3 11 BIAS_RES DATA 4 10 VCC_DIG LE 5 9 N/C 6 7 8 PCS_LNA_OUT Cellular band IS95/IS2000 LNA with four gain steps and programmable current N/C Wide voltage range for both digital and analog supply voltages, 2.7 V to 3.3 V Together with Skyworks SKY74100 direct conversion receiver, the SKY74092-11 offers a cost effective, high performance RF-tobaseband radio solution. By cascading the SKY74092-11 with the SKY74100 DCR™, Printed Circuit Board (PCB) layout can easily be optimized for small areas and easy routing. N/C Features CELL_LNA_IN CDMA and PCS phones CELL_LNA_OUT Dual-band cellular handsets S322 Figure 1. SKY74092-11 Pinout – 16-Pin LGA Package (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 103205E • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • July 23, 2010 1 DATA SHEET • SKY74092-11 LNA Bias Resistor VCC VCC Bias Reference PCS_LNA_IN CELL_LNA_IN + + 4-Step PCS LNA + 4-Step Cell LNA + PCS_LNA_OUT CELL_LNA_OUT 3-Wire Serial Bus LE CLK VCC DATA S323 Figure 2. SKY74092-11 LNA Block Diagram Technical Description Bias Reference (pins 3, 4, and 5, respectively) provide the control inputs. The SKY74092-11 provides the following control and test registers: LNA bias currents are derived from an on-chip bandgap voltage reference. The voltage reference requires a 10 k external resistor. Mode Selection Gain Control Current Selection Cellular Band LNA The SKY74092-11 supports two types of fixed-length data transfers: 9-bit and 27-bit. Data is latched starting from the second high-to-low transition on the CLK signal after LE goes low. The first high-to-low transition of the CLK signal is ignored. The cellular band LNA requires an off-chip matching network at input and output terminals. The LNA is designed to provide a low Noise Figure (NF) and high 3rd order Input Intercept Point (IIP3) to achieve the maximum dynamic range. The cellular LNA has four gain steps to optimize gain, linearity, and noise at various input signal levels: high gain, mid-gain, bypass, and high attenuation. PCS Band LNA The PCS band LNA requires an off-chip matching network at input and output terminals. The PCS LNA is designed to provide a low NF and high IIP3 to achieve the maximum dynamic range. The PCS LNA has four gain steps to optimize gain, linearity, and noise at various input signal levels: high gain, mid-gain, bypass, and high attenuation. Serial Interface A three-wire serial bus is used to control the operation mode, gain, and current of the LNAs. The CLK, DATA, and LE signals 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 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. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 2 July 23, 2010 • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • 103205E DATA SHEET • SKY74092-11 LNA Electrical and Mechanical Specifications An application schematic diagram for the SKY74092-11 is shown in Figure 3. The package dimensions for the 16-pin LGA are shown in Figure 4, and the tape and reel dimensions are provided in Figure 5. Signal pin assignments and functional pin descriptions are described in Table 1. The absolute maximum ratings of the SKY74092-11 are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Tables 4 and 5. Tables 6 through 8 provide the control logic for the SKY74092-11. Table 1. SKY74092-11 Pin Assignments and Signal Descriptions Pin # Name Description 1 LNA_RANGE0 LNA gain control input (bit 0). Hardware control disabled. Needs to be grounded with software control. 2 LNA_RANGE1 LNA gain control input (bit 1). Hardware control disabled. Needs to be grounded with software control. 3 CLK Clock for the three-wire bus 4 DATA Data for the three-wire bus 5 LE Latch enable for the three-wire bus 6 CELL_LNA_OUT Externally matched cellular LNA output 7 N/C No connection 8 PCS_LNA_OUT Externally matched PCS LNA output 9 N/C No connection 10 VCC_DIG Supply voltage for digital circuitry 11 BIAS_RES External 10 k bias resistor 12 VCC_BIAS Supply voltage for bias circuitry 13 N/C No connection 14 PCS_LNA_IN Externally matched PCS LNA input 15 N/C No connection 16 CELL_LNA_IN Externally matched cellular LNA input Table 2. Absolute Maximum Ratings Parameter Symbol Minimum Typical Maximum Units Supply voltage VDD 0 5.0 V DC voltage at control ports VCNTL 0 0.3 + VDD V Power into LNA inputs PIN, LNA –5.0 dBm Operating temperature TA –30 +85 C Storage temperature TSTG –40 +125 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 values. 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. With the exception of the input pins, the SKY74092-11 ESD threshold level, with respect to ground, is ±2.0 kV using Human Body Model (HBM) testing. The HBM ESD withstand threshold value for input pins is 900 V. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 103205E • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • July 23, 2010 3 DATA SHEET • SKY74092-11 LNA Table 3. Recommended Operating Conditions (@ +25 °C, VCC = 2.85 V) Parameter Symbol Supply voltage Minimum Typical Maximum Units 2.7 2.85 3.3 V RF frequency range (cellular band) 869 894 MHz RF frequency range (PCS) 1930 1990 MHz Operating temperature range –30 +85 C +25 Table 4. Electrical Characteristics: Cellular LNA Mode Settings (869-894 MHz) (Note 1) (TA = +25 C, VCC = 2.85 V, Unless Otherwise Noted) Parameter Symbol Test Conditions Minimum Typical Maximum Units 15 16 16.8 dB 1.2 1.5 dB LNA High Gain Gain Noise Figure IIP3 7.5 9.0 dBm 1 dB compression point at input –8 –7 dBm Input/output return loss (Note 2) ZS/L = 50 –12 –10 dB Reverse isolation 20 21 dB Current 8 9 12 mA 6.5 7.5 8.5 dB 4.2 5.2 dB LNA Mid-Gain Gain Noise Figure IIP3 9.5 1 dB compression point at input Input/output return loss (Note 2) –2 ZS/L = 50 11 dBm –1 –10 dBm –8 dB Reverse isolation 15 16 Current 6 8 10 mA dB –4 –3 –2 dB 3 4 IIP3 18.5 20.0 dBm 1 dB compression point at input 2.5 3.5 dBm LNA Bypass Gain Noise Figure Input/output return loss (Note 2) Zs/l = 50 Reverse isolation –8 2 Current –7 3 dB dB dB A 200 240 –17 –16 dB 17 18 dB LNA High Attenuation Gain –18 Noise Figure IIP3 1 dB compression point at input Input/output return loss (Note 2) 20.5 22.0 dBm 4 5 dBm ZS/L = 50 Reverse isolation –12 16 Current –10 dB 240 A 17 200 dB Note 1: Performance is guaranteed only under the conditions listed in this Table. Note 2: Input and output externally matched to 50 . Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 July 23, 2010 • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • 103205E DATA SHEET • SKY74092-11 LNA Table 5. Electrical Characteristics: PCS LNA Mode Settings (1930-1990 MHz) (Note 1) (TA = +25 C, VCC = 2.85 V, Unless Otherwise Noted) Parameter Symbol Test Conditions Minimum Typical Maximum Units 16 16.8 dB 1.3 1.6 dB LNA High Gain Gain 15 Noise Figure IIP3 1 dB compression point at input Input/output return loss (Note 2) 7.0 8.5 –12.0 –10.5 ZS/L = 50 –11.5 dBm dBm –10.0 dB Reverse isolation 20.0 21.5 dB Current 9.0 11.1 13.0 mA 6.0 7.0 7.8 dB 4.3 5.3 IIP3 7.5 9.0 dBm 1 dB compression point at input –4.5 –3.0 dBm Reverse isolation 14.0 15.5 Current 7.0 8.5 11 mA –5 –4 –3 dB 4 5 dB LNA Mid-Gain Gain Noise Figure Input/output return loss (Note 2) ZS/L = 50 –7 –6 dB dB dB LNA Bypass Gain Noise Figure IIP3 20.5 1 dB compression point at input Input/output return loss (Note 2) 3.0 ZS/L = 50 Reverse isolation 22.0 dBm 4.5 –10 dBm –8 dB 200 240 A –18 –17 –16 dB 17 18 23.5 25.0 dBm 4 5 dBm 3 Current 4 LNA High Attenuation Gain Noise Figure IIP3 1 dB compression point at input Input/output return loss (Note 2) ZS/L = 50 Reverse isolation –9 16 Current –7 17 200 dB dB dB 240 A Note 1: Performance is guaranteed only under the conditions listed in this Table. Note 2: Input and output externally matched to 50 . Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 103205E • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • July 23, 2010 5 DATA SHEET • SKY74092-11 LNA Table 6. Mode Selection Register Bit Range Description [2:0] Bits [2:0]: Not configurable – must be set to 1 1 1 [4:3] Bits [4:3]: LNA mode control 0 0 = Cellular mode 0 1 = Not used 1 0 = Not used 1 1 = PCS mode [7:5] [8] Bits [7:5]: Not configurable – must be set to 1 0 0 Bit [8]: LNA enable 0 = LNA off 1 = LNA on [26:9] Bits [26:9]: Not configurable – must be set to 0 1 0 0 0 1 0 1 1 0 0 0 0 0 0 1 0 0 Table 7. Gain Control Register Bit Range Description [3:0] Bits [3:0]: Not configurable – must be set to 0 0 0 0 [5:4] Bits [5:4]: LNA gain control: 0 0 = High gain 0 1 = Mid-gain 1 0 = Bypass 1 1 = High attenuation [8:6] Bits [8:6]: Not configurable – must be set to 0 0 1 Table 8. Current Selection Register Bit Range [0] [3:1] Description Bit [0]: Not configurable – must be set to 1 Bits [3:1]: CDMA LNA current selection (high gain setting only) 0 0 0 = 5.862 mA 0 0 1 = 7.159 mA 0 1 0 = 8.427 mA 0 1 1 = 9.735 mA 1 0 0 = 10.944 mA 1 0 1 = 12.246 mA 1 1 0 = 13.503 mA 1 1 1 = 14.795 mA Note that the current can also be adjusted with the external bias resistor. [6:4] Bits [6:4]: PCS LNA current selection (high gain setting only) 0 0 0 = 5.590 mA 0 0 1 = 6.990 mA 0 1 0 = 8.360 mA 0 1 1 = 9.736 mA 1 0 0 = 11.030 mA 1 0 1 = 12.146 mA 1 1 0 = 12.749 mA 1 1 1 = 13.098 mA Note that the current can also be adjusted with the external bias resistor. [26:7] Bits [26:7]: Not configurable – must be set to 0 1 0 0 0 1 0 1 1 0 0 0 0 0 1 0 1 0 0 1 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 July 23, 2010 • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • 103205E DATA SHEET • SKY74092-11 LNA C303 0.1 μF C301 0.1 μF Cellular LNA Input R301 0Ω PCS LNA Input 50 Ω 50 Ω L72 DNI L73 100 nH × LNA_Range1 PCS_LNA_IN 2 LNA_Range0 14 NC 1 15 CELL_LNA_IN 16 NC 13 R305 10 Ω × L75 5.6 nH VCC RF Bias VCC_BIAS 12 C70 33 pF 3 Clock SKY74092 CLK BIAS_RES 11 R202 C214 10 kΩ 1 nF 6 7 9 C67 1 μF Digital VCC R306 10 Ω 8 C76 5.6 pF × 50 Ω Cellular LNA Output NC 10 × PCS_LNA_OUT LE L76 8.2 nH C304 0.1 μF VCC_DIG NC 5 Latch Enable DATA CELL_LNA_OUT 4 Data 50 Ω PCS LNA Output C305 DNI R307 10 Ω L74 27 nH L22 2.2 nH Cellular LNA VCC C66 1 μF C306 1 μF C78 DNI R200 10 Ω PCS LNA VCC C199 1 μF C65 1 μF S718 Figure 3. SKY74092-11 Schematic Diagram Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 103205E • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • July 23, 2010 7 DATA SHEET • SKY74092-11 LNA 1.355 ± 0.05 3.0 ± 0.05 1.205 ± 0.05 Pin 1 Indicator Metal Pad -- Pin 1 0.5 ± 0.05 1.355 ± 0.05 3.0 ± 0.05 Top View Solder Mask Opening (R0.5 ± 0.05) A 1.0 ± 0.075 0.5 ± 0.05 Side View Bottom View Solder Mask Edges R0.05 Metal Pad Edge 0.38 ± 0.05 0.04 ± 0.05 0.3 ± 0.05 0.4 ± 0.05 S141 Detail A All measurements are in millimeters Figure 4. SKY74092-11 16-Pin LGA Package Dimensions 0.25 ± 0.05 (T) ∅1.50 +0.10/–0 1.75 ± 0.10 4.00 ± 0.10 2.00 ± 0.05 B A ∅1.00 ± 0.10 1.40 ± 0.10 (Ko) Pin #1 Indicator B 8.00 ± 0.10 B Notes: 1. Carrier tape: black conductive polycarbonate or polystyrene. 2. Cover tape material: transparent conductive PSA. 3. ESD-surface resistivity shall be ≤1 x 1010 Ohms/square per EIA, JEDEC TNR Specification. 4. 10 sprocket hole pitch cumulative tolerance: ±0.20 mm. 5. Ao and Bo measured on plane 0.30 mm from bottom pocket. 6. All measurements are in millimeters. 12.00 ± 0.20 A 5.50 ± 0.05 3.20 ± 0.10 (Bo) 5° Max. 5° Max. 3.20 ± 0.10 (Ao) A S2086a Figure 5. SKY74092-11 Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 8 July 23, 2010 • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • 103205E DATA SHEET • SKY74092-11 LNA Ordering Information Model Name SKY74092-11 LNA Manufacturing Part Number SKY74092-11 Evaluation Board Part Number *** TBD *** Copyright © 2003, 2005, 2006, 2007, 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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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 103205E • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • July 23, 2010 9