DATA SHEET
SKY73032-11: 700 – 1000 MHz High Gain and Linearity Single Downconversion Mixer
Applications
x 2G/3G base station transceivers: GSM/EDGE, CDMA, UMTS/WCDMA, iDEN
x Land mobile radio x ISM band transceivers x High performance radio links x RF identification
Features
x Operating frequency range: 700 to 1000 MHz x IF frequency range: 40 to 300 MHz x Conversion gain: 9.5 dB x Input IP3: +27.0 dBm x Output IP3: +36.5 dBm x Noise figure: 8.3 dB x Integrated LO drivers x Integrated low loss RF baluns x High linearity IF amplifiers x On-chip SPDT LO switch (greater than 40 dB LO-to-LO isolation) x Small, MCM (20-pin, 5 x 5 mm) Pb-free package (MSL3, 260 qC
per JEDEC J-STD-020)
RXIF IFA+ IFA– VCC_IFRF
Description
The SKY73032-11 is a fully integrated single 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 SKY73032-11 features an input IP3 of +27.0 dBm and a Noise Figure (NF) of 8.3 dB, making the device an ideal solution for high dynamic range systems such as 2G/3G base station transceivers. 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 SKY73032-11 is manufactured using a robust silicon BiCMOS process and has been designed for optimum long-term reliability. The SKY73032-11 single downconversion mixer is provided in a compact, 20-pin 5 x 5 mm 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.
Skyworks offers lead (Pb)-free RoHS (Restriction of Hazardous Substances) compliant packaging.
RF
LO1
LO2 LO_SEL
VCC_LO Figure 1. SKY73032-11 Block Diagram
S937
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 •
[email protected] • www.skyworksinc.com 200625E • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • August 24. 2009
1
DATA SHEET • SKY73032-11 DOWNCONVERSION MIXER
VCC_LO RXIF N/C IF+
VCC_LOSW IF– LO_SEL GND GND N/C
VCC_IFRF 1 RF 2 N/C 3
GND 4 GND 5
20 19 18 17 16
15 LO2 14 GND 13 GND 12 N/C 11 LO1
6 7 8 9 10
Figure 2. SKY73032-11 Pinout – 20-Pin MCM
S938
Table 1. SKY73032-11 Signal Descriptions
Pin # Name
Description
1 VCC_IFRF
IF and RF DC supply, +5V
2 RF
RF input
3 N/C
No connection
4 GND
Ground
5 GND
Ground
6 VCC_LO
LO DC supply, +5V
7 N/C
No connection
8 VCC_LOSW
LO switch DC supply, +5V
9 LO_SEL
LO select switch control
10 GND
Ground
Pin # 11 12 13 14 15 16 17 18 19 20
Name LO1 N/C GND GND LO2 N/C GND IF– IF+ RXIF
Description LO1 input No connection Ground Ground LO2 input No connection Ground Negative IF output Positive IF output IF bias adjust
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 •
[email protected] • www.skyworksinc.com 2 August 24. 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200625E
DATA SHEET • SKY73032-11 DOWNCONVERSION MIXER
Functional Description
The SKY73032-11 is a high gain single mixer, optimized for base station receiver applications. The device consists of a low loss RF balun, high linearity passive mixer, and a low noise IF amplifier.
An LO amplifier is also included that allow the SKY73032-11 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 (LO1 and LO2) for frequency hopping applications such as GSM.
RF Baluns and Passive Mixer
The RF baluns provide a single ended input, which can easily be matched to 50 : using a simple external matching circuit. The RF baluns offer very low loss, and excellent amplitude and phase balance.
The high linearity SKY73032-11 is a passive, double balanced mixer that provides a very low conversion loss, and excellent 3rd Order Input Insertion Point (IIP3).
Addtionally, the balanced nature of the mixer provides for high port-to-port isolation.
LO Buffers and SPDT LO Switch
The LO buffers allow the input power of the SKY73032-11 to be in the range of r6 dBm. The LO section is optimized for high-side LO injection. However, each of the two LOs can be driven over a wide frequency range with only slight degradation in performance.
A high isolation SPDT switch allows the SKY73032-11 to be used for frequency hopping applications. This switch provides greater than 40 dB of LO1 to LO2 isolation:
LO_SEL Input High Low
LO Path Selected LO1 (pin 11) enabled LO2 (pin 15) enabled
For applications that do not require frequency hopping, LO_SEL is fixed to one state and the appropriate LO.