
Page 1 of 9
Document No. 70-0218-06
│ www.psemi.com
2007 Peregrine Semiconductor Corp. All rights reserved.
This product is a high linearity, 6-bit RF Digital Step Attenuator
(DSA) covering a 31.5 dB attenuation range in 0.5 dB steps.
The Peregrine 50
RF DSA provides a parallel CMOS control
interface and it operates on 3-volt to 5-volt supply. It maintains
high attenuation accuracy over frequency and temperature and
exhibits very low insertion loss and low power consumption.
This Peregrine DSA is available in a 4x4 mm 24 lead QFN
footprint with an exposed ground paddle.
The PE4309 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.
Product Specification
50
RF Digital Attenuator
6-bit, 31.5 dB, DC-4.0 GHz
Product Description
Figure 1. Functional Schematic Diagram
PE4309
Features
Best in class 2.0 kV HBM ESD tolerance
Low Insertion Loss: 1.6 dB typical
Attenuation: 0.5 dB steps to 31.5 dB
High Linearity: Typical 52 dB IP3
Best in Class Attenuation accuracy
Parallel programming interface
Single supply, 3V to 5V operation
Standard 3V or 5V CMOS control logic
independent of supply voltage
Very low power consumption
RoHS-compliant 24-lead 4x4 mm QFN
Control Logic Interface
Parallel Control
RF Input
RF Output
Switched Attenuator Array
6
Table 1. Electrical Specifications @ +25°C, VDD = 3.0 V - 5.0 V
Notes: 1. Device Linearity will begin to degrade below 5 MHz.
2. Note Absolute Maximum in Table 4.
3. See Figures 12 and 13 for typical attenuation error.
4. Measurements made in a 50 ohm system (see Figure 4, Test Circuit Block Diagram). Resistors (R2, R3, R5, R6, R7) with a
value of 10K-ohm are used to decouple the RF path from the control inputs.
Figure 2. Package Type
4x4 mm 24-Lead QFN
Parameter
Test Conditions4
Frequency
Min
Typ
Maximum
Units
Operation Frequency
DC
4000
MHz
Insertion Loss
DC - 2.2 GHz
2.2 - 4.0 GHz
-
1.6
2.2
2
3.4
dB
Attenuation Accuracy
Any Bit or Bit Combination
0.5 - 7.5 dB States 3
8.0 - 15.5 dB States 3
16.0 - 31.5 dB States3
DC
≤ 1.0 GHz
1.0 < 2.2 GHz
2.2 < 3.8 GHz
-
0.15
0.7
1.2
±(0.10 + 3% of atten setting), not to exceed +0.20 dB
±(0.15 + 3% of atten setting)
-
dB
1 dB Compression2
1 MHz - 2.2 GHz
2.2 - 4.0 GHz
30
-
32
-
dBm
Input IP31
Two-tone inputs +18 dBm
1 MHz - 2.2 GHz
2.2 - 4.0 GHz
-
52
45
-
dBm
Return Loss
DC - 2.2 GHz
2.2 - 4.0 GHz
15
10
20
-
dB
Switching Speed
50% of control voltage to
90% of final attenuation level
-
1
s