PE94302_07 Datasheet, PDF (1/6 Pages) Peregrine Semiconductor Corp. – 50 ohm RF Digital Step Attenuator For Rad-Hard Space Applications 6-bit, 31.5 dB, DC - 4.0 GHz

Product Description
The PE94302 is a high linearity, 6-bit UltraCMOS™ RF Digital
Step Attenuator (DSA) specifically optimized for rad-hard space
applications. This 50-ohm RF DSA covers a 31.5 dB
attenuation range in 0.5 dB steps. It provides both parallel and
serial CMOS control interface. The PE 94302 maintains high
attenuation accuracy over frequency and temperature and
exhibits very low insertion loss and power consumption.
The PE94302 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.
Advance Information
PE94302
50 Ω RF Digital Step Attenuator
For Rad-Hard Space Applications
6-bit, 31.5 dB, DC – 4.0 GHz
Features
• Attenuation: 0.5 dB steps to 31.5 dB
• Flexible parallel and serial programming
interfaces
• 100 Krads (Si) Total Dose
• Positive CMOS control logic
• High attenuation accuracy and linearity
over temperature and frequency
• Very low power consumption
• 50 Ω impedance
Figure 1. Functional Schematic Diagram
RF Input
Switched Attenuator Array
Parallel Control 6
Serial Control ³
Control Logic Interface
RF Output
Figure 2. Package Type
28-lead CQFP
Table 1. Electrical Specifications @ +25°C, V_DD = 3.0 V
Parameter
Test Conditions
Frequency
Operation Frequency³
DC-4000
Insertion Loss
DC - 2.2 GHz
Attenuation Accuracy
Any Bit or Bit Combination
0.5 dB - 23.5 dB Attenuation
24 dB - 31.5 dB Attenuation
DC ≤ 1.0 GHz
1.0 GHz ≤ 2.2 GHz
1.0 GHz ≤ 2.2 GHz
1 dB Compression^1,2
1 MHz - 2.2 GHz
Input IP3¹
Two-tone inputs
1 MHz - 2.2 GHz
Return Loss
DC - 2.2 GHz
RF Input Power (50 Ω)
Switching Speed
50% of control voltage to 90% of final
attenuation level
Notes: 1. Device Linearity will begin to degrade below 1 MHz
2. Maximum Operating Power = +12 dBm
3. Specs are guaranteed to 2.2 GHz, Characterized to 4.0 GHz
Typical
1.5
+/-(0.25 + 3% of attenuation setting)
+/-(0.25 + 5% of attenuation setting)
+/-(11% of attenuation setting)
34
52
20
1
Max
12
Units
MHz
dB
dB
dBm
dBm
dB
dBm
µs
Document No. 70/0186-02 │ www.psemi.com
©2005-2007 Peregrine Semiconductor Corp. All rights reserved.
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