SP43503 Datasheet, PDF (1/10 Pages) SIPAT Co,Ltd – SP43503

Product Description
The SP43503 is a HaRP™-enhanced, high linearity, 5-bit RF
Digital Step Attenuator (DSA) covering a 31 dB attenuation
range in 1 dB steps. The Peregrine 50Ω RF DSA provides a
serial CMOS control interface. It maintains high attenuation
accuracy over frequency and temperature and exhibits very low
insertion loss and low power consumption. Performance does
not change with Vdd due to on-board regulator. This next
generation Peregrine DSA is available in a 4x4 mm 24-lead
QFN footprint.
The SP43503 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. Package Type
24-lead 4x4x0.85 mm QFN Package
Product Specification
SP43503
50 Ω RF Digital Attenuator
5-bit, 31 dB, 9 kHz - 6.0 GHz
Features
• HaRP™-enhanced UltraCMOS™ device
• Attenuation: 1 dB steps to 31 dB
• High Linearity: Typical +58 dBm IP3
• Excellent low-frequency performance
• 3.3 V or 5.0 V Power Supply Voltage
• Fast switch settling time
• Programming Modes:
• Direct Parallel
• Latched Parallel
• Serial
• High-attenuation state @ power-up (PUP)
• CMOS Compatible
• No DC blocking capacitors required
• Packaged in a 24-lead 4x4x0.85 mm QFN
Figure 2. Functional Schematic Diagram
Switched Attenuator Array
RF Input
RF Output
Parallel Control 5
Serial In
CLK
LE
Control Logic Interface
A0
A1
A2
P/S
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