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DATA SHEET
SKY73013-306: Direct Quadrature Demodulator 4.9-5.925 GHz Featuring "No-Pull" LO Architecture
Applications

Functional Block Diagram
Baseband Output I+ I-
WiMAX, WLAN receivers UNII Band OFDM receivers RFID, DSRC applications Proprietary radio links
Features

RF is non-integer multiple of LO frequency Broadband RF: 4.9-5.925 GHz, LO: 3.268-3.952 GHz, IF: DC-100 MHz Single 3.3 V supply Very low LO drive level (-15 dBm) High dynamic range, low noise figure Excellent linearity and quadrature accuracy--suitable for 64-QAM OFDM Low current consumption Small 4 x 4 mm 16-lead QFN package Available lead (Pb)-free and RoHS-compliant
RF Input
LNA
x 3/2 Frequency Multiplier
2/3 FRF Local Oscillator
Gain Control (on/off) Q+ Q-
Baseband Output
Description
The Skyworks SKY73013-306 is an integrated receiver downconverter subsystem for the 4.9-5.925 GHz band. Its exceptional dynamic range and quadrature accuracy make this device an ideal solution for direct conversion and low-IF OFDM and singlecarrier communications systems (including 64-QAM WiMax and WLAN). The SKY73013-306 employs an innovative "no-pull" local oscillator (LO) architecture which offsets the required synthesizer frequency from that of the receiver center frequency by the non-integer factor of 3/2. This greatly improves the performance of direct conversion receiver architecture by eliminating dynamic DC offsets (caused by LO-RF leakage) and VCO pulling. This receiver frequency plan is compatible with the 3/2 "no-pull" modulator frequency plan. The SKY73013-306 contains a low noise amplifier at the RF input, the gain of which can be set to a high or low value via the gain control input. This LNA drives a highly linear quadrature mixer pair. The quadrature local oscillator signals to these mixer stages are provided by the 3/2 frequency conversion stage. The nominal supply voltage for SKY73013-306 is 3.3 V. This part can operate over the temperature range of -40 C to 85 C. An evaluation board is available upon request.
NEW
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
200508 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * August 18, 2006
1
PRELIMINARY DATA SHEET * SKY73013-306
Electrical Specifications
VCC = 3.3 V, T = 25 C, LO Input Power = -15 dBm, ZOUT = 1000 Differential unless otherwise noted
Parameter Condition Min. 3 Typ. 3.3 33 4.9 3.268 -20 Differential Differential -15 100 100 0.15 2 Direct conversion measurement (no image), LNA Gain control voltage = VCC Direct conversion measurement (no image), LNA Gain control voltage = 0 V LNA gain control voltage = VCC LNA gain control voltage = 0 V LNA gain control voltage = VCC LNA gain control voltage = 0 V LNA gain control voltage = VCC LNA gain control voltage = 0 V LNA gain control voltage = VCC LNA gain control voltage = 0 V Differential 500 || 15 1.55 Differential DC 61 1.65 10 1.75 20 2 100 22.5 0 -17 -16 6.5 25 24.5 2 -15 -14 28 32 0 3 0.25 3 7.5 26 26 4 dB Deg dB dB dB dB dBm dBm dBm dBm dBm dBm || pF V mV Vpp MHz dB 5.925 3.952 -10 Max. 3.6 Unit V mA GHz GHz dBm
DC Operating Conditions
Supply voltage DC current
RF Performance
RF input frequency LO input frequency LO drive level RF input impedance LO input impedance IQ amplitude imbalance IQ phase error Noise figure
Voltage conversion gain(1) Input 1 dB compression point Input IP2 Input IP3 BB load impedance IF output common mode voltage IF DC offset IF output linear signal swing IF frequency range LO-to-RF isolation
1. Voltage conversion gain = 20 log10 (VOUTrms/VINrms), independent of impedance.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 2
August 18, 2006 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200508 Rev. B
PRELIMINARY DATA SHEET * SKY73013-306
Typical Performance Data
VCC = 3.3 V, T = 25 C, LO Input Power = -15 dBm, ZOUT = 1000 Differential unless otherwise noted
30 25 30 25 LNA Gain Control = VCC
Voltage Gain (dB)
20 15 10 5 0 -5 4600 4800 5000
Noise Figure (dB)
LNA Gain Control = 0 V 20 15 10 5
LNA Gain Control = 0 V
LNA Gain Control = VCC
5200
5400
5600
5800
6000
4600
4800
5000
5200
5400
5600
5800
6000
Frequency (MHz)
Frequency (MHz)
Voltage Conversion Gain vs. Frequency
0.25 LNA Gain Control = VCC 3.0
Noise Figure vs. Frequency
Phase Error (Degrees)
0.20
2.5 2.0 1.5 1.0 0.5 0
I/Q Imbalance (dB)
0.15 0.10 0.05 0 4600 4800 5000 5200 5400 5600 5800 6000 LNA Gain Control = 0 V
4600
4800
5000
5200
5400
5600
5800
6000
Frequency (MHz)
Frequency (MHz)
I/Q Imbalance vs. Frequency
-10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 4600 4800 5000 5200 5400 5600 5800 6000 LNA Gain Control = VCC LNA Gain Control = 0 V
Phase Error vs. Frequency
IP1 dB (dBm)
Frequency (MHz)
Input 1 dB Compression Point vs. Frequency
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
200508 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * August 18, 2006
3
PRELIMINARY DATA SHEET * SKY73013-306
Pin Out
EN
16
Pin Descriptions
Gain C
15
I14
I+
13 12 N/C 11 LO10 LO+ 9 CTR2
Pin # 1 2 3 4 5 6 7 8 9 10
Name RBIAS LNA+ LNA1 GND VCC Q+ QCTR1 CTR2 LO+ LON/C I+ IGainC EN RF input + RF input Ground Supply voltage
Description Bias resistor. Nominal value = 1.2 k, 1%
RBIAS LNA+ LNAGND
1 2 3 4 5 6 7 8
BB/IF Q+ output BB/IF Q- output Debug pin; connect to ground Debug pin; connect to ground Local oscillator input + Local oscillator input No connection BB/IF I+ output BB/IF I- output Gain control; LNA is ON with VCC applied to this pin, off when grounded Chip enable; chip is enabled with VCC applied to this pin and disabled when this pin is grounded Must be connected via lowest possible impedance to ground for proper electrical and thermal performance
VCC
Q+
Q-
CTR
Evaluation Board
The SKY73013 Evaluation Board is used to test the performance of the SKY73013 Direct Quadrature Demodulator. The evaluation board BOM is as shown in the table below. The evaluation board for SKY73013 allows the part to be fully exercised. The board is populated with several components which are not required for normal operation but facilitate special testing of the SKY73013, such as two high gain, differential baseband amplifiers which are well-suited for differential-tosingle-ended conversion, and are included for noise figure measurements. The evaluation board requires a power supply voltage of 3.3 V nominal, that is capable of sourcing 50 mA.
11 12 13 14 15 16
Paddle
Absolute Maximum Ratings Evaluation Circuit PCB
VCC VGC (LNA On/Off) IF Outputs: [I-, I+, Q+, Q-]
Characteristic RF Input Power Supply voltage Supply current LO input power Operating temperature
Value 0 dBm 4.5 V 60 mA 0 dBm -40 C to +85 C -65 C to +85 C
RF+
LO+
Storage temperature
Performance is guaranteed only under the conditions listed in the specifications table and is not guaranteed under the full range(s) described by the Absolute Maximum specifications. Exceeding any of the absolute maximum/minimum specifications may result in permanent damage to the device and will void the warranty. RFLOOp-Amp IF Outputs: [I-, I+, Q+, Q-] Op-Amp Power Header [+5 V, +1.5 V, GND, -5 V] High Gain Op-Amps to Observe very Small Signals on an Oscilloscope
CAUTION: Although this device is designed to be as robust as possible, ESD (Electrostatic Discharge) 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 must be employed at all times.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 4
August 18, 2006 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200508 Rev. B
PRELIMINARY DATA SHEET * SKY73013-306
Evaluation Circuit Schematic
VGAIN CONTROL VCC Ground Ground H2 Enable C22 C23 VOCM } "I" R8 U1 16 R1 C1 C2 RF Input + C4 RF Input C3 3 LNA4 GND VCC 5 L5 VCC C7 C6 C20 R2 VP VOCM Ground VN H4 C30 VN VP VOCM VOCM R4 U3 AD8138ARM VP } "I" BB Out } "Q" BB Out VN R6 2 LNA+ SKY73013 LO+ 10 CTR2 CTR1 8 9 C8 C19 C27 LO- 11 L6 EN 1 R BIAS 15 GainC 14 I13 I+ N/C 12 L8 C10 LO Input + LO Input R9 VN } "Q" BB Out BB Out U2 AD8138ARM R7 VCC R5 C25 VP H1 C25
Q+ 6
Q7
R3
H3
C1, C3, C8, C10 not installed. Zero resistors installed in positions L5, L6, and L8. U2, U3, and associated components are installed to facilitate nosie figure measurements.
Evaluation Board Test Procedure for Gain, Quadrature Accuracy, and Input Compression
Use the following testing procedure to set up the SKY73013 evaluation board for testing. 1. Connect a 3.3 V DC power supply to VCC and either 3.3 V or 0 V to VGAIN CONTROL (for high or low gain). 2. Connect a 100 balun (recommended: Krytar 4020080 180 Hybrid, with the Summing port terminated with 50 ) to the RF input input. Connect a vector signal generator to the input of the balun. Alternatively, at the expense of 3 dB signal loss, it is possible to drive the RF input single-ended with a 50 source, as long as the opposite input is terminated with 50 . Set this source to -20 dBm. 3. Connect a CW sine wave source, at 2/3 the RF frequency, to the LO. It is less critical to use a balun on this port, although it is still recommended. Set this source to -15 dBm . 4. Connect oscilloscope probes on the I+, I-, Q+ and Q- pins of header 1 5. Enable power supply. 6. Enable RF (set to CW) and LO power sources. 7. Observe quadrature amplitude balance and phase accuracy. 8. Adjust RF drive level to observe signal compression.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
200508 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * August 18, 2006
5
PRELIMINARY DATA SHEET * SKY73013-306
Evaluation Board Test Procedure for Evaluating Noise Floor
This is procedure assumes that circuit is set up according to the procedure described above. 1. Reduce the input RF level to -60 dBm 2. Connect 5 V to the 5 V pin on header 4 to power the differential amplifiers U2 and U3. 3. Move the Oscilloscope probes to the I+, I-, Q+ and Q- pins of header 3. The differential amplifiers are included in the signal path because the IF output signals directly from the I and Q baseband outputs of the SKY73013 are smaller than the minimum required by most oscilloscopes to make a reasonable measurement, although these signal levels are well within the dynamic range of almost any op amp or variable gain amplifier. 4. Adjust RF signal generator level until demodulated noise is approximately equal to that of the downconverted sinusoid output level. This input signal level corresponds to the inputreferred noise floor, the input level at which the output SNR is 0 dB.
Evaluation Board Components
Component C1, C3, C8, C12, C17 C2, C4 C6 C7, C23 C10, C25, C26, C27 C13, C14 C15, C18, C22, C24 C20 C21 C28, C29, C30 H1, H3 H2, H4 L5, L6, L8 R1 R2 R3, R5, R6, R9 R4, R7, R8 RFC1, RFC2, RFC3 U1 U2, U3 Description Do not place 0.5 pF 10 pF 100 pF 5 pF 2.7 pF 1000 pF 1 pF 0 0.1 F 8-pin SMT header 4-pin header 0 1.2 k 1% 500 39k 500 SMA connector SKY73013 AD8318ARM 0402 0402 0402 0402 0402 0201 0804 0603 0201 0402 0402 0402 0402 0402 Default
Circuit Design Considerations
The following design considerations are general in nature and must be followed regardless of final use or configuration. 1. Paths to ground should be made as short as possible, with lowest possible impedance. 2. The ground pad of the SKY73013 direct quadrature demodulator has special electrical and thermal grounding requirements. This pad is the main thermal conduit for heat flow from the die to the circuit board. As such, design the printed circuit board ground pad to dissipate the maximum heat produced by the SKY73013 and ensure that the method used to electrically and mechanically connect the SKY73010 package to this ground pad is adequate to allow for this heat flow. 3. Two external bypass capacitors on the Vcc pin are recommended. One larger-value capacitor should be used for low frequency bypassing and the other, smaller value capacitor for high frequency bypassing. The smaller capacitor should be physically located as near as possible to the SKY73013 VCC pin. Special attention should be given to ensure that the selected smaller capacitor does not go into parallel self resonance at the RF frequency. 4. The RF and LO inputs must be driven differentially for optimal performance. A 1:1 impedance balun is recommended for each with a center tap on the secondary side that is DC grounded. Special attention should be paid to ensure that the center tap has access to as "clean" a ground as possible.
QFN-16 (4 X 4mm)
0.157 (4.00 mm) Pin 1 Indicator 0.157 (4.00 mm) 0.008 (0.20 mm) Seating Plane 0.0008 (0.02 mm) +0.001 (0.03 mm) -0.0008 (0.02 mm) 0.035 (0.90 mm) 0.004 (0.10 mm)
0.085 (2.15 mm) + 0.004 (0.10 mm) - 0.006 (0.15 mm) Exposed Pad 0.077 (1.950 mm)
0.042 (1.075 mm)
0.085 (2.15 mm) + 0.004 (0.10 mm) - 0.006 (0.15 mm)
0.077 (1.950 mm)
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 6
August 18, 2006 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200508 Rev. B
PRELIMINARY DATA SHEET * SKY73013-306
Copyright (c) 2002, 2003, 2004, 2005, 2006, Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. ("Skyworks") products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes. No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided hereunder, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale. THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. 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 * sales@skyworksinc.com * www.skyworksinc.com
200508 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * August 18, 2006
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