Product Specification
PE4304
Product Description
The PE4304 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 PE4304 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 PE4304 exhibits very low insertion loss
and low power consumption. This functionality is delivered in a
4x4 mm QFN footprint.
The PE4304 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.
Figure 1. Functional Schematic Diagram
Switched Attenuator Array
RF Input
RF Output
75
Ω
RF Digital Attenuator
6-bit, 31.5 dB, DC – 2.0 GHz
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
Figure 2. Package Type
4x4 mm -20 Lead QFN
Parallel Control
Serial Control
Power-Up Control
6
3
Control Logic Interface
2
Table 1. Electrical Specifications @ +25 °C, V
DD
= 3.0 V, Z
o
= 75
Ω
Parameter
Operation Frequency
Insertion Loss
2
Attenuation Accuracy
1 dB Compression
3,4
Input IP3
1,2,4
Return Loss
Switching Speed
Notes: 1.
2.
3.
4.
50% control to 0.5 dB
of final value
Two-tone inputs up to
+18 dBm
Any Bit or Bit
Combination
DC
≤
1.2 GHz
DC
≤
1.2 GHz
1 MHz
≤
1.2 GHz
1 MHz
≤
1.2 GHz
DC
≤
1.2 GHz
Test Conditions
Frequency
Minimum
DC
-
-
30
-
10
-
Typical
Maximum
2000
Units
MHz
dB
dB
dBm
dBm
dB
µs
1.4
-
34
52
13
-
1.8
±(0.15 + 4% of attenuation
setting)
-
-
-
1
Device Linearity will begin to degrade below 1Mhz
Max input rating in Table 2 & Figures on Pages 4 to 6 for data across frequency.
Note Absolute Maximum in Table 3.
Measured in a 50
Ω
system.
©2005 Peregrine Semiconductor Corp. All rights reserved.
Page 1 of 11
Document No. 70-0066-03
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