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Document No. 70/0056~02D www.psemi.com ©2005 Peregrine Semiconductor Corp. All rights reserved.
4x4mm -20 Lead QFN
The PE4302 is a high linearity, 6-bit RF Digital Step Attenuator
“DSA” covering a 31.5 dB attenuation range in 0.5 dB steps.
This 50-ohm RF DSA provides both parallel 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
PE4302 exhibits very low insertion loss and low power
consumption. This functionality is delivered in a 4x4mm QFN
footprint.
The PE4302 is manufactured in Peregrine’s patented Ultra
Thin Silicon (UTSi®) CMOS process, offering the performance
of GaAs with the economy and integration of conventional
CMOS.
Product Specification
50 Ω RF Digital Attenuator
6-bit, 31.5 dB, DC – 4.0 GHz
Product Description
Figure 1. Functional Schematic Diagram
PE4302
Features
• Attenuation: 0.5 dB steps to 31.5 dB
• 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
• 50 impedance
• Packaged in a 20 lead 4x4mm QFN
Control Logic Interface
Parallel Control
Power-Up Control
Serial Control
RF Input
RF Output
Switched Attenuator Array
6
3
2
Figure 2. Package Type
Table 1. Electrical Specifications @ +25°C, V
DD
= 3.0 V
Parameter Test Conditions Frequency Minimum Typical Maximum Units
Operation Frequency DC 4000
MHz
Insertion Loss
2
DC - 2.2 GHz - 1.5 1.75
dB
Attenuation Accuracy
Any Bit or Bit
Combination
DC 1.0 GHz
1.0 < 2.2 GHz
- -
±(0.10 + 3% of atten setting)
±(0.15 + 5% of atten setting)
dB
dB
1 dB Compression
3
1 MHz - 2.2 GHz 30 34 -
dBm
Input IP3
1,2
Two-tone inputs
+18 dBm
1 MHz - 2.2 GHz - 52 - dBm
Return Loss DC - 2.2 GHz 15 20 - dB
Switching Speed
50% control to 0.5 dB
of final value
- - 1 µs
Notes: 1. Device Linearity will begin to degrade below 1 Mhz
2. See Max input rating in Table 2 & Figures on Pages 2 to 4 for data across frequency.
3. Note Absolute Maximum in Table 3.
