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Product Specification PE4304

75 RF Digital Attenuator 6-bit, 31.5 dB, DC – 2.0 GHz

Product Description

The PE4304 is a 75-ohm high-linearity, 6-bit RF Digital Step Attenuator (DSA) covering a 31.5 dB attenuation range in 0.5 dB steps. The PE4304 provides both a parallel (latched or direct mode) and serial CMOS control interface, operates on a single 3-volt supply and maintains high attenuation accuracy over frequency and temperature. It also has a unique control interface that allows the user to select an initial attenuation state at power-up. The PE4304 exhibits very low insertion loss and low power consumption. This functionality is delivered in a 4x4 mm QFN footprint. The PE4304 is manufactured on Peregrine’s UltraCMOS™ process, a patented variation of silicon-on-insulator (SOI) technology on a sapphire substrate, offering the performance of GaAs with the economy and integration of conventional CMOS. Features ? 75 impedance ? Attenuation: 0.5 dB steps to 31.5 dB ? Low distortion for CATV and multi-carrier applications ? Flexible parallel and serial programming interfaces ? Unique power-up state selection ? Positive CMOS control logic ? High attenuation accuracy and linearity over temperature and frequency ? Very low power consumption ? Single-supply operation ? Packaged in a 20 lead 4x4 mm QFN Figure 1. Functional Schematic Diagram Figure 2. Package Type

Switched Attenuator Array

4x4 mm 20-Lead QFN

Parallel ControlPower-Up ControlSerial ControlRF InputRF Output

63 2

Control Logic Interface

Table 1. Electrical Specifications @ +25 °C, V

DD

= 3.0 V, Z

o

= 75

Parameter Test Conditions Frequency Minimum Typical Maximum Units

Operation Frequency DC 2000 MHz Insertion Loss
2 DC 1.2 GHz - 1.4 1.8 dB Attenuation Accuracy Any Bit or Bit Combination DC 1.2 GHz - - ±(0.15 + 4% of attenuation setting) dB 1 dB Compression
3,4 1 MHz 1.2 GHz 30 34 - dBm Input IP3
1,2,4 Two-tone inputs up to +18 dBm 1 MHz 1.2 GHz - 52 - dBm Return Loss DC 1.2 GHz 10 13 - dB Switching Speed 50% control to 0.5 dB of final value -- 1 µ s Notes: 1. Device Linearity will begin to degrade below 1Mhz 2. Max input rating in Table 3 & Figures on Pages 4 to 6 for data across frequency. 3. Note Absolute Maximum in Table 3. 4. Measured in a 50 system. Document No. 70-0066-04 www.psemi.com ©2003-2006 Peregrine Semiconductor Corp. All rights reserved. Page 1 of 11