RFDA2125 Datasheet, PDF (23/26 Pages) RF Micro Devices – Digital Controlled Variable Gain Amplifier 400MHz to 2700MHz, 6-Bit 0.5dB LSB Control

RFDA2125
Control Bit
D5
D4
D3
D2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
0
1
1
0
1
1
0
1
1
1
0
0
0
0
rfmd.com
Truth Table
D1
D0 ^{Gain Relative to Maximum Gain}
1
1
0dB
1
0
-0.5dB
0
1
-1dB
1
1
-2dB
1
1
-4dB
1
1
-8dB
1
1
-16dB
0
0
-31.5dB
Programming example – 6-Bit
CLK
DATA
LE
MSB
LSB
D5 D4 D3 D2
D1 D0
Power-up Programming Truth Table
PUP
Attenuator Setting
Low
Attenuation at max, 31.5dB
High
Attenuation at min, 0dB
Serial Port Interface
Logic Voltage Levels
State
Logic
Low
0V to 0.8V
High
2.0V to 5.0V
DS130326
7628 Thorndike Road, Greensboro, NC 27409-9421 ∙ For sales or technical
support, contact RFMD at ([phone] or [e-mail].
23 of 26