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SP4304 Datasheet(PDF) 1 Page - SIPAT Co,Ltd |
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SP4304 Datasheet(HTML) 1 Page - SIPAT Co,Ltd |
1 / 10 page Page 1 of 10 The SP4304 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 SP4304 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 SP4304 exhibits very low insertion loss and low power consumption. This functionality is delivered in a 4x4 mm QFN footprint. The SP4304 is manufactured on SIPAT’s CMOS 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. Product Specification 75 Ω RF Digital Attenuator 6-bit, 31.5 dB, DC – 2.0 GHz Product Description Figure 1. Functional Schematic Diagram SP4304 Features • 75 Ω 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 Table 1. Electrical Specifications @ +25 °C, VDD = 3.0 V, Zo = 75 Ω 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 Ω system. Control Logic Interface Parallel Control Power-Up Control Serial Control RF Input RF Output Switched Attenuator Array 6 3 2 Parameter Test Conditions Frequency Minimum Typical Maximum Units Operation Frequency DC 2000 MHz Insertion Loss2 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 Compression3,4 1 MHz ≤ 1.2 GHz 30 34 - dBm Input IP31,2,4 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 µs Figure 2. Package Type 4x4 mm 20-Lead QFN Tel: +86-23-62808818 Fax: +86-23-62805284 www.sipatsaw.com / sawmkt@sipat.com |
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