UMTS Digital Gain Control
Amplifier, 1.94 - 2.34 GHz
AM55
-0027

4mm FQFP-N Package Style
V 1E.00
Advanced
Features
n Digitally Controlled Gain Block
n Parallel Control Interface
n 4mm FQFP-N Package
n Single Positive Supply Voltage
n 0.25 dB Steps of Attenuation
n 10 dB Atttenuation Range

Description
M/A-COM’s AM55-0027 is a digitally controlled Variable
Gain Amplifier. Attenuation range is 10 dB with
Attenuation Steps of 0.25 dB. Attenuation is controlled
digitally through a parallel interface.
Electrical Specifications: TA = 25°C, Z0 = 50W, VS = 5V
Parameter Conditions Frequency Units Min. Typ. Max.
Gain No Attenuation 1.94 - 2.34 GHz dB 24 26 —
Attenuation Range — 1.94 - 2.34 GHz dB 10 10 —
Attenuation Step Size — 1.94 - 2.34 GHz dB 0.2 0.25 0.3
Amplitude Flatness —
All attenuation states
1.94 - 2.34 GHz
2.09 - 2.19 GHz
dB
dB
—
—
—
—
± 0.3
± 0.1
Input Return Loss — 1.94 - 2.34 GHz dB 13 18 —
Output Return Loss — 1.94 - 2.34 GHz dB 10 14 —
Output P1 dB 0 dB attenuation 1.94 - 2.34 GHz dBm 15 19 —
Output IP3 0 dB attenuation 1.94 - 2.34 GHz dBm 30 31 —
Noise Figure 0 dB attenuation 1.94 - 2.34 GHz dB — 4.7 —
Noise Figure 10 dB attenuation 1.94 - 2.34 GHz dB — 9.0 —
Supply Current — — mA — 110 120
Block Diagram
8 dB
Gain
IN
10 dB
Range
in
0.25 dB
Steps
8 dB
Gain
9 dB
Gain
OUT
Parallel
Control
Interface