1 dB Step Size DGA
Data Sheet
Dual, 35 dB Range, 1 dB Step Size DGA ADL5205
FEATURES
Dual, independent, digitally controlled gain amplifi...
Description
Data Sheet
Dual, 35 dB Range, 1 dB Step Size DGA ADL5205
FEATURES
Dual, independent, digitally controlled gain amplifier (DGA) −9 dB to +26 dB gain range 1 dB step size, ±0.2 dB accuracy at 200 MHz 100 Ω differential input resistance 10 Ω differential output resistance 1.2 dB change in noise figure for first 12 dB of gain reduction Output third-order intercept (OIP3): 48.5 dBm at 200 MHz, 5 V,
high performance mode −3 dB bandwidth: 1700 MHz typical in high performance
mode Multiple control interface options
Parallel 6-bit control interface with latch Serial peripheral interface (SPI) with fast attack Gain step up/down interface Wide input dynamic range Low power mode Power-down control Single 3.3 V or 5 V supply operation 40-lead, 6 mm × 6 mm LFCSP package
APPLICATIONS
Differential analog-to-digital converter (ADC) drivers High intermediate frequency (IF) sampling receivers High output power IF amplification Instrumentation
FUNCTIONAL BLOCK DIAGRAM
SIDE A
SPI WITH FA,
PARALLEL WITH LATCH,
UP/DOWN
PWUPA
VPOS
LOGIC
VINA+
0dB TO 23dB
100Ω
VINA–
MODE0 MODE1
PM
CONTROL CIRCUITRY
14dB TO
26dB
VOUTA–
10Ω VOUTA+
VINB+
0dB TO 23dB
100Ω
VINB–
14dB TO
26dB
VOUTB– 10Ω
VOUTB+
LOGIC
ADL5205
SIDE B
PWUPB
SPI WITH FA,
PARALLEL WITH LATCH,
UP/DOWN
Figure 1.
GND
13488-001
GENERAL DESCRIPTION
The ADL5205 is a digitally controlled, wide bandwidth, variable gain dual amplifier (DGA) that provides precise gain control, high output third-order intercept (OIP3) and...
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