700 - 1000 MHz High Gain and Linearity SingleSource: Skyworks Solutions, Inc.
The SKY73070 is a fully integrated single mixer that includes a Local Oscillator (LO) driver, high linearity mixer, and large dynamic range Intermediate Frequency (IF) amplifier. A low loss RF balun has also been included to reduce design complications and lower system cost. The SKY73070 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 SKY73070 is manufactured using a robust silicon BiCMOS process and has been designed for optimum long-term reliability. The SKY73070 single downconversion mixer is provided in a compact, 20-pin 5 x 5 mm Multi-Chip Module (MCM)..Request Information
The SKY73070 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 SKY73070 to connect directly to the output of a Voltage Controlled Oscillator (VCO). This eliminates the extra gain stages needed by most discrete passive mixers. RF Balun and Passive Mixer The RF balun provides a single ended input, which can easily be matched to 50 Ù using a simple external matching circuit. The RF balun offers very low loss, and excellent amplitude and phase balance. The high linearity SKY73070 is a passive, double balanced mixer that provides a very low conversion loss, and excellent 3rd Order Input Insertion Point (IIP3). Additionally, the balanced nature of the mixer provides for high port-to-port isolation. LO Buffer An LO buffer allows the input power of the SKY73070 to be in the range of ±6 dBm. The LO section is optimized for high-side LO injection. However, the LO can be driven over a wide frequency range with only slight degradation in performance. IF Amplifier The SKY73070 includes a high dynamic range IF amplifier that follows the passive mixer 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 Ù impedance. The IF amplifier is optimized for IF frequencies between 40 and 300 MHz. The IF amplifier can be operated outside of this range, but with a slight degradation in performance.