SP4306 Datasheet, PDF (1/10 Pages) SIPAT Co,Ltd – 50 Ω RF Digital Attenuator

Product Description
The PE4306 is a high linearity, 5-bit RF Digital Step Attenuator
(DSA) covering a 31 dB attenuation range in 1dB steps, and is
pin compatible with the SP430x series. This 50-ohm RF DSA
provides both 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
SP4306 exhibits very low insertion loss and low power
consumption. This functionality is delivered in a 4x4 mm QFN
footprint.
The SP4306 is manufactured on SIPAT’s CMOS
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
Product Specification
SP4306
50 Ω RF Digital Attenuator
5-bit, 31 dB, DC – 4.0 GHz
Features
• Attenuation: 1 dB steps to 31 dB
• Flexible parallel and serial programming
interfaces
• Latched or direct mode
• 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
• Pin compatible with SP430x series
• Packaged in a 20 Lead 4x4 mm QFN
Figure 2. Package Type
4x4 mm 20-Lead QFN
Parallel Control 5
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
Minimum Typical
Operation Frequency
Insertion Loss²
DC
DC - 2.2 GHz
-
1.5
Attenuation Accuracy
1 dB Compression³
Input IP3^{1, 2}
Return Loss
Any Bit or Bit
Combination
DC ≤ 1.0 GHz
1.0 < 2.2 GHz
-
-
1 MHz - 2.2 GHz
30
34
Two-tone inputs
+18 dBm
1 MHz - 2.2 GHz
-
52
DC - 2.2 GHz
15
20
Switching Speed
50% control to 0.5 dB
of final value
-
-
Notes: 1. Device Linearity will begin to degrade below 1 MHz
2. See Max input rating in Table 3 & Figures on Pages 2 to 4 for data across frequency.
3. Note Absolute Maximum in Table 3.
Maximum
4000
2.25
±(0.3 + 3% of atten setting)
±(0.3 + 5% of atten setting)
-
-
-
1
Units
MHz
dB
dB
dB
dBm
dBm
dB
µs
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