SKY73090-21 SKYWORKS | Alldatasheet
Document overview
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Technical content
Features
Operating frequency range: 1700 to 2200 MHz IF frequency range: 50 to 500 MHz Conversion gain: 8.7 dB Input IP3: +24.2 dBm Output IP3: +32.8 dBm Noise figure: 9.4 dB Power-down mode Integrated LO drivers Integrated low loss RF baluns High linearity IF amplifiers On-chip SPDT LO switch (greater than 40 dB LO-to-LO isolation) Small, MCM (36-pin, 6 x 6 mm) package (MSL3, 260 C per JEDEC J-STD-020) S2027 RFA RFB IFB+ IFB– LO1 PWRDN LO2 LO_SEL (Switch Enable) IFA+ IFA– Figure 1. SKY73090-21 Block Diagram
Description
The SKY73090-21 is a fully integrated diversity mixer that includes Local Oscillator (LO) drivers, an LO switch, high linearity mixers, and large dynamic range Intermediate Frequency (IF) amplifiers. Low loss RF baluns have also been included to reduce design complications and lower system cost. The SKY73090-21 features an input IP3 of +24.2 dBm and a Noise Figure (NF) of 9.4 dB, making the device an ideal solution for high dynamic range systems such as 2G/3G base station receivers. The LO switch provides more than 40 dB of isolation between LO inputs and supports the switching time required for GSM/EDGE base stations. The SKY73090-21 is manufactured using a robust silicon BiCMOS process and has been designed for optimum long-term reliability. The SKY73090-21 diversity downconversion mixer is provided in a compact, 36-pin Multi-Chip Module (MCM). A functional block diagram is shown in Figure 1. The pin configuration and package are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1.
Figure 2. SKY73090-21 Pinout – 36-Pin MCM Table 1. SKY73090-21 Signal Descriptions
1 RFA RF channel A input 19 LO1 Local oscillator #1 input
2 N/C No connect 20 GND Ground
3 GND Ground 21 VCC5 DC supply, +5 V
4 VCC1 DC supply, +5 V 22 PWRDN Power-down mode enable
5 GND Ground 23 LO_SEL Local oscillator switch select
6 VCC2 DC supply, +5 V 24 GND Ground
7 GND Ground 25 GND Ground
8 N/C No connect 26 GND Ground
9 RFB RF channel B input 27 LO2 Local oscillator #2 input
10 VCC3 DC supply, +5 V 28 N/C No connect
11 N/C No connect 29 RIFA IF channel A bias control
12 GND Ground 30 VCC6 DC supply, +5 V
13 IFB+ IF channel B positiv e output 31 N/C No connect
14 IFB– IF channel B negative output 32 IFA+ IF channel A positive output
15 N/C No connect 33 IFA– IF channel A negative output
16 VCC4 DC supply, +5 V 34 GND Ground
17 RIFB IF channel B bias control 35 N/C No connect
18 N/C No connect 36 VCC7 DC supply, +5 V
PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201316A • Skyworks Proprietary and Confiden tial Information • Products and Product Information are Subject to Change Without Notice • June 21, 2010 3 Functional Description The SKY73090-21 is a high gain diversity mixer, optimized for base station receiver applications. The device consists of two diversity channels, each consisting of a low loss RF balun, high linearity passive mixer, and a low noise IF amplifier. The SKY73090-21 also includes a power-down feature used to lower the supply current for standby operation. LO amplifiers are also included that allow the SKY73090-21 to connect directly to the output of a Voltage Controlled Oscillator (VCO). This eliminates the extra gain stages needed by most discrete passive mixers. A Single Pole, Double Throw (SPDT) switch has been included to select between two different LO inputs for frequency hopping applications (i.e., GSM). RF Baluns and Passive Mixer The RF baluns provide a single ended input, which can easily be matched to 50 using a simple matching circuit. The RF baluns offer very low loss and excellent amplitude and phase balance. The high linearity mixer is a passive, double balanced mixer that provides a very low insertion loss, and excellent 3 rd Order Input Insertion Point (IIP3) and linearity performance. Addtionally, the balanced nature of the mixer provides for excellent port-to-port isolation. LO Buffers and SPDT LO Switch The LO buffers allow the input power of the SKY73090-21 to be programmed in the range of –6 to +6 dBm. The LO section has been optimized for low-side LO injection. However, the LO can be driven over a wide frequency range with only slight degradation in performance. A high isolation SPDT switch allows the SKY73090-21 to be used for frequency hopping applications. This switch provides greater than 55 dB of LO1 to LO2 isolation: LO_SEL Logic: State: High LO1 enabled Low LO2 enabled For applications that do not require frequency hopping, LO_SEL is fixed to one state and the appropriate LO input is used. IF Amplifier The SKY73090-21 includes high dynamic range IF amplifiers that follow the passive mixers in the signal path. The outputs require a supply voltage connection using inductive chokes. These choke inductors should be high-Q and have the ability to handle 200 mA or greater. A simple matching network allows the output ports to be matched to a balanced 200 impedance. The IF amplifiers are optimized for IF frequencies between 40 and 250 MHz. The IF amplifiers can be operated outside of this range, but with a slight degradation in performance. Power-Down Mode The SKY73090-21 also includes a low current power-down mode controlled by pin 22 (PWRDN). When this pin is at a logic high level, the power-down function is enabled with the total mixer current under 1 μA. Electrical and Mechanical Specifications The absolute maximum ratings of the SKY73090-21 are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Table 4.
Table 2. SKY73090-21 Absolute Maximum Ratings parameters set at or below their nominal value. Nominal thermal resistance (junction to center ground pad) is 5.1 C/W. or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times. Table 3. SKY73090-21 Recommended Operating Conditions Note 1: The SKY73090-21 has been optimized for high side LO injection. However, the LO can be used outside of the specified frequency range with degraded performance.
Table 4. SKY73090-21 Electrical Specifications (Note 1) Note 1: Performance is guaranteed only under the conditions listed in this Table. Note 2: Characterized and guaranteed by design; not tested in production. Note 3: Power-down functionality tested in production. Power-down current (IOFF) production-tested to be < 1 mA.
of the SKY73090-21 Evaluation Board is shown in Figure 5.
- Paths to ground should be made as short as possible.
- The ground pad of the SKY73090-21 has special electrical
- Skyworks recommends including external bypass capacitors
on the VCC voltage inputs of the device.
- Components L5, L6, L14, and L15 (see Figure 5) are high-Q
currents in excess of 200 mA DC.
- Components R1 and R2 (see Figure 5) set the bias current for
Evaluation Board to operate as specified in Tables 3 and 4. Figure 6. Figure 7 shows the package dimensions for the 36-pin MCM and Figure 8 provides the tape and reel dimensions. subjected to high temperature during solder assembly. Packages, document number 101752. done manually or in a production solder reflow environment.
Figure 3. SKY73090-21 Evaluation Board Assembly Diagram
Figure 4. SKY73090-21 Evaluation Board Layer Detail
corresponding component symbol shown here. Figure 5. SKY73090-21 Evaluation Board Schematic
mask opening of the package. planes for optimum electrical performance.
0.25 Typ
Figure 6. PCB Layout Footprint for the SKY73090-21 6 x 6 mm MCM
0.15 A B C
0.2 A B C
Figure 7. SKY73090-21 36-Pin MCM Package Dimensions
- Carrier tape: black conductive polycarbonate
- Cover tape material: transparent conductive PSA
- Cover tape size: 9.3 mm width
- All dimensions are in millimeters
- Pin 1 orientation is in top left corner for the following Skyworks products:
Figure 8. SKY73090-21 Tape and Reel Dimensions
PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201316A • Skyworks Proprietary and Confiden tial Information • Products and Product Information are Subject to Change Without Notice • June 21, 2010 13
Ordering Information
Model Name Manufacturing Part Number Evaluation Board Part Number SKY73090-21 1700 – 2200 MHz Downconversion Mixer with Power-Down Mode Copyright © 2010 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.