SP43701 Datasheet, PDF (1/12 Pages) SIPAT Co,Ltd – 50 Ω RF Digital Attenuator

Product Description
The SP43701 is a HaRP™-enhanced, high linearity, 7-bit RF
Digital Step Attenuator (DSA). This highly versatile DSA
covers a 31.75 dB attenuation range in 0.25 dB steps. The
SIPAT 50 Ω RF DSA provides a parallel or serial-
addressable 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 SIPAT DSA is available in a
5x5 mm 32-lead QFN footprint.
The SP43701 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
32-lead 5x5x0.85 mm QFN Package
Product Specification
SP43701
50 Ω RF Digital Attenuator
7-bit, 31.75 dB, DC-4.0 GHz
Features
• HaRP™-enhanced CMOS device
• Attenuation: 0.25 dB steps to 31.75 dB
• High Linearity: Typical +59 dBm IIP3
• 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-Addressable: Program up to
eight addresses 000 - 111
• High-attenuation state @ power-up (PUP)
• CMOS Compatible
• No DC blocking capacitors required
• Packaged in a 32-lead 5x5x0.85 mm QFN
Figure 2. Functional Schematic Diagram
RF Input
Switched Attenuator Array
Parallel Control 7
Serial In
CLK
LE
Control Logic Interface
A0
A1
A2
P/S
RF Output
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