PE94302 Datasheet, PDF (1/5 Pages) Peregrine Semiconductor Corp. – 50 Ω 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 which operate on a single 3-volt
supply. It also has a unique control interface that allows the
user to select an initial attenuation state at power-up. The PE
94302 maintains high attenuation accuracy over frequency and
temperature and exhibits very low insertion loss and power
consumption.
The PE94302 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.
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
• 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 Ω impedance
Figure 1. Functional Schematic Diagram
RF Input
Switched Attenuator Array
RF Output
Figure 2. Package Type
28-lead CQFP
Parallel Control 6
Serial Control ³
Power-Up Control ²
Control Logic Interface
Table 1. Electrical Specifications @ +25°C, V_DD = 3.0 V
Parameter
Test Conditions
Frequency
Operation Frequency³
Insertion Loss
Attenuation Accuracy
1 dB Compression^1,2
Any Bit or Bit Combination
0.5 dB - 23.5 dB Attenuation
24 dB - 31.5 dB Attenuation
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
Input IP3¹
Two-tone inputs
1 MHz - 2.2 GHz
Return Loss
RF Input Power (50 Ω)
DC - 2.2 GHz
Switching Speed
50% control to 0.5 dB of final
value
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. 70/0186-01 │ www.psemi.com
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
©2005 Peregrine Semiconductor Corp. All rights reserved.
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