APN2014
APN2014 is 6 Bit 63 dB RF Digital Attenuator manufactured by Skyworks Solutions.
APPLICATION NOTE
APN2014: 6 Bit 63 d B RF Digital Attenuator Solution 500- 2000 MHz
High dynamic range systems often require an attenuator with a very wide attenuation range. It is possible to achieve 63 d B attenuation range by cascading two low cost digital attenuators, AA101-80 and AA104-73. It is effectively impossible to achieve such high attenuation range with a single package device.
AA101-80 is a 5-bit attenuator with a 1 d B least significant bit (LSB). Full-scale attenuation for this attenuator is 31 d B. AA104-73 is a 1-bit digital attenuator that produces 32 d B attenuation. When these two attenuators are cascaded on a standard FR4 printed circuit board, 63 d B total attenuation range with 1 d B step size is produced within the frequency range 500 MHz to 2 GHz.
VS V1
V5
R1
AA101-80 C1
V6 V7
AA104-73 C2
C3
R1: 10 kΩ C1, C3: 47 p F C2: 12 p F
Figure 1. Block Diagram, 6 Bit Attenuator, 900 MHz
The AA104-73 offers unique design flexibility in a miniature SOT-6 package....
