SKY73078-459LF

DATA SHEET SKY73078-459LF: 500-1500 MHz Quadrature Modulator Applications Description  Cellular base station systems: GSM/EDGE, CDMA2000, W-CDMA, TD-SCDMA, LTE Skyworks SKY73078-459LF is an integrated quadrature modulator for the upconversion of complex modulated baseband/IF signals directly up to RF. The device is designed for use in the 500 to 1500 MHz range. The high linearity, and excellent I/Q phase accuracy and amplitude balance of the SKY73078-459LF make it ideal for use in high performance communication systems.  WiMAX/broadband wireless access systems  Satellite modems Features  RF frequency operation range: 500 to 1500 MHz  Modulation bandwidth > 65 MHz (0.1 dB), 210 MHz (1 dB)  Side-band suppression better than –45 dBc  Carrier feedthrough of –40 dBm  Noise floor of –158 dBm/Hz  Single supply: 4.75 to 5.25 V  QFN (24-pin, 4 x 4 mm) package (MSL1, 260 C per JEDEC J-STD-020) Skyworks Pb-free products are compliant with all applicable legislation. For additional information, refer to Skyworks Definition of Lead (Pb)-Free, document number SQ04-0073. The modulator accepts two differential baseband inputs and a single-ended Local Oscillator (LO), and generates a single-ended RF output. The baseband input buffers accept an input commonmode voltage of 0.5 V and have a 0.1 dB bandwidth of >65 MHz. The LO input is broadband matched on-chip to 50 Ω, which enables a direct connection to a 50 Ω LO source. The RF output is high impedance, designed for a direct connection to a 50 Ω load. Figure 1 shows a functional block diagram for the SKY73078459LF. The device package and pinout for the 24-pin Quad Flat No-Lead (QFN) package are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1. BBIP BBIN LOP LON 0/90 Σ BBQP BBQN RFOUT S1610 Figure 1. SKY73078-459LF Functional Block Diagram Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201121I • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • October 26, 2018 1 BBQP BBQN GND GND BBIN BBIP DATA SHEET • SKY73078-459LF QUADRATURE MODULATOR 24 23 22 21 20 19 VCC 4 15 VCC VCC 5 14 VCC VCC 6 13 RFOUT 7 8 9 10 11 12 GND 16 VCC GND VCC 3 GND 17 VCC LON GND 2 LOP 18 VCC GND GND 1 S1609 Figure 2. SKY73078-459LF Pinout, 24-Pin QFN (Top View) Table 1. SKY73078-459LF Signal Descriptions Pin # 1 Name Description Pin # Name Description GND Ground 13 RFOUT RF output. Pin should be AC-coupled to the load. 2 GND Ground 14 VCC +5 VDC supply 3 VCC +5 VDC supply 15 VCC +5 VDC supply 4 VCC +5 VDC supply 16 VCC +5 VDC supply 5 VCC +5 VDC supply 17 VCC +5 VDC supply 6 VCC +5 VDC supply 18 VCC +5 VDC supply 7 GND Ground 19 BBIP High impedance positive I input. Should be externally DC-biased to 0.5 V. 8 LOP 50 Ω single-ended positive LO input. Pin must be AC-coupled to the LO. 20 BBIN High impedance negative I input. Should be externally DC-biased to 0.5 V. 9 LON 50 Ω single-ended negative LO input. Pin must be AC-coupled to ground. 21 GND Ground 10 GND Ground 22 GND Ground 11 GND Ground 23 BBQP High impedance positive Q input. Should be externally DC-biased to 0.5 V. 12 GND Ground 24 BBQN High impedance negative Q input. Should be externally DC-biased to 0.5 V. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 2 October 26, 2018 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 20112I DATA SHEET • SKY73078-459LF QUADRATURE MODULATOR Technical Description Mixers The SKY73078-459LF is comprised of four main functional areas: the LO chain, the baseband input level shifters, the mixers, and the differential to single-ended converter. The SKY73078-459LF incorporates two Gilbert-type, doublebalanced mixers for both the In-Phase (I) and Quadrature (Q) channels. The differential output currents are summed together into an on-chip passive balun, which converts the differential signal to a single-ended output. LO Chain The LO chain consists of an input linear buffer, a polyphase quadrature phase splitter, and limiting amplifiers. The input buffer provides an internal 50 Ω match while generating an amplified differential signal to the polyphase splitters. Differential to Single-Ended Converter The LO can be driven either single-ended or differentially. For single-ended LO signals, the LON signal (pin 9) should be ACgrounded using a capacitor. Each quadrature LO signal is passed through limiting amplifiers before driving the mixers. The differential to single-ended converter is an on-chip passive balun that converts the differential mixer output signal to a singleended signal. The high impedance output of the balun is designed to interface directly to a 50 Ω load. If desired, an external matching network could be used for power matching between the balun and the 50 Ω load. Baseband Input Level Shifters Electrical and Mechanical Specifications The baseband inputs present a high input impedance while providing proper DC levels for the mixer inputs. The recommended DC voltage for the baseband common-mode voltage is 500 mV. The absolute maximum ratings of the SKY73078-459LF are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Tables 4, 5, and 6. Table 2. SKY73078-459LF Absolute Maximum Ratings Parameter Symbol Minimum Maximum Units Supply voltage, +5 V VCC 5.50 V Supply current ICC 218 mA LO input power PLO +6 dBm Operating temperature TC Junction temperature TJ Storage temperature TSTG 4.75 Typical –40 –40 +85 °C +150 °C +125 °C Notes: 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. Exceeding any of the limits listed here may result in permanent damage to the device. Nominal thermal resistance (junction to case) is 5.1 °C/W. 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. The SKY73078-459LF ESD threshold level is 2500 VDC using Human Body Model (HBM) testing. This level applies to RF signal lines >100 MHz, analog and RF lines