Features and Benefits
- 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
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.
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.
The two channels of the ADL5205 can be powered up 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 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.
Note that throughout this data sheet, multifunction pins, such as CSA/A3, are referred to by the entire pin name or by a single function of the pin, for example, CSA, when only that function is relevant.
- Differential analog-to-digital converter (ADC) drivers
- High intermediate frequency (IF) sampling receivers
- High output power IF amplification
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
The ADL5205-EVALZ evaluation board provides interfaces to the ADL5205 Dual DGA through serial and the parallel interface ports, as well as through the USB port on a Microsoft® Windows® PC via the system demonstration platform (SDP) interface board. Additionally, toggle switches allow the manually control of all the digital functions for the Dual DGA.
A 3.3 V low dropout (LDO) voltage regulator supplies the logic circuits when the device is running on a 5 V supply. On-board baluns convert single-ended input signals to differential form for input to the device and convert the differential output signals of the device to single-ended form for output.
The ADL5205-EVALZ evaluation board is built on a 4-layer 370HR (FR4) Printed Circuit Board.
Tools & Simulations
Sys-Parameter models contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.