Dual, 35 dB Range, 1 dB Step Size DGA
ADL5205
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
SIDE A
Dual, independent, digitally controlled gain amplifier (DGA)
−9 dB to +26 dB gain range
SPI WITH FA,
PARALLEL WITH LATCH,
UP/DOWN
PWUPA VPOS
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, 5V,
high performance mode
LOGIC
VINA+
VINA–
VOUTA–
VOUTA+
14dB
0dB TO 23dB
TO
100Ω
10Ω
26dB
−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
MODE0
MODE1
PM
CONTROL
CIRCUITRY
VINB+
VINB–
14dB
TO
26dB
VOUTB–
VOUTB+
0dB TO 23dB
LOGIC
100Ω
10Ω
ADL5205
Single 3.3 V or 5 V supply operation
40-lead, 6 mm × 6 mm LFCSP package
PWUPB
GND
SIDE B
SPI WITH FA,
PARALLEL WITH LATCH,
UP/DOWN
APPLICATIONS
Differential analog-to-digital converter (ADC) drivers
High intermediate frequency (IF) sampling receivers
High output power IF amplification
Figure 1.
Instrumentation
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 a near constant noise
figure for the first 12 dB of attenuation. The excellent OIP3
performance of 48.5 dBm (at 200 MHz, 5 V, high performance
mode, and maximum gain) makes the ADL5205 an excellent
gain control device for a variety of receiver applications.
low power mode. When disabled, the ADL5205 consumes only
14 mA and offers excellent input to output isolation. The gain
setting is preserved when the device is disabled.
Fabricated on the Analog Devices, Inc., high speed, silicon
germanium (SiGe) complementary BiCMOS process, the
ADL5205 provides precise gain adjustment capabilities with good
distortion performance. The ADL5205 amplifier comes in a
compact, thermally enhanced, 6 mm × 6 mm, 40-lead LFCSP
package and operates over the temperature range of −40°C to
+85°C.
For wide input dynamic range applications, the ADL5205
provides a broad 35 dB gain range with a 1 dB step size. The
gain is adjustable through multiple gain control and interface
options: parallel, SPI, or gain step up/down control.
Note that throughout this data sheet, multifunction pins, such
The two channels of the ADL5205 can be powered up
as
/A3, are referred to by the entire pin name or by a single
CSA
independently by applying the appropriate logic level to the
PWUPA and PWUPB pins. The quiescent current of the ADL5205
is typically 175 mA for high performance mode and 135 mA for
function of the pin, for example,
is relevant.
, when only that function
CSA
Rev. 0
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rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
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Tel: 781.329.4700
Technical Support
©2016 Analog Devices, Inc. All rights reserved.
www.analog.com
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