SP4302 Datasheet, PDF (1/10 Pages) SIPAT Co,Ltd – 50 Ω RF Digital Attenuator

Product Description
The SP4302 is a high linearity, 6-bit RF Digital Step Attenuator
(DSA) covering a 31.5 dB attenuation range in 0.5 dB steps.
This 50-ohm RF DSA provides both parallel 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
SP4302 exhibits very low insertion loss and low power
consumption. This functionality is delivered in a 4x4 mm QFN
footprint.
The SP4302 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.
Product Specification
SP4302
50 Ω RF Digital Attenuator
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
• Packaged in a 20 lead 4x4mm QFN
Figure 1. Functional Schematic Diagram
RF Input
Switched Attenuator Array
Figure 2. Package Type
4x4 mm 20-Lead QFN
RF Output
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
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
1.75
±(0.10 + 3% of atten setting)
±(0.15 + 5% of atten setting)
-
-
-
1
Units
MHz
dB
dB
dB
dBm
dBm
dB
µs
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