Advance Information
PE94302
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.
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
Switched Attenuator Array
RF Input
RF Output
Figure 2. Package Type
28-lead CQFP
Parallel Control
Serial Control
6
3
Control Logic Interface
Table 1. Electrical Specifications @ +25°C, V
DD
= 3.0 V
Parameter
Operation Frequency
3
Insertion Loss
Any Bit or Bit Combination
0.5 dB - 23.5 dB Attenuation
24 dB - 31.5 dB Attenuation
Test Conditions
Frequency
DC-4000
DC - 2.2 GHz
DC
≤
1.0 GHz
1.0 GHz
≤
2.2 GHz
1.0 GHz
≤
2.2 GHz
1 MHz - 2.2 GHz
Typical
Max
Units
MHz
1.5
+/-(0.25 + 3% of attenuation setting)
+/-(0.25 + 5% of attenuation setting)
+/-(11% of attenuation setting)
34
52
20
12
dB
Attenuation Accuracy
dB
1 dB Compression
1,2
Input IP3
1
Return Loss
RF Input Power (50
Ω)
Switching Speed
50% of control voltage to 90% of final
attenuation level
Two-tone inputs
dBm
dBm
dB
dBm
µs
1 MHz - 2.2 GHz
DC - 2.2 GHz
1
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
Document No. 70/0186-02
│
www.psemi.com
©2005-2007 Peregrine Semiconductor Corp. All rights reserved.
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