MAX2065 Datasheet, PDF (1/27 Pages) Maxim Integrated Products – 50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA

19-3131; Rev 0; 3/08
50MHz to 1000MHz High-Linearity, Serial/
Parallel-Controlled Analog/Digital VGA
General Description
The MAX2065 high-linearity, analog/digital variable-
gain amplifier (VGA) is designed to operate in the
50MHz to 1000MHz frequency range with two indepen-
dent attenuators (see the Typical Application Circuit).
The digital attenuator is controlled as a slave peripheral
using either the SPI™-compatible interface or a parallel
bus with 31dB total adjustment range in 1dB steps. An
added feature allows “rapid-fire” gain selection
between each of four steps, preprogrammed by the
user through the SPI-compatible interface. The 2-pin
control allows the user to quickly access any one of
four customized attenuation states without reprogram-
ming the SPI bus. The analog attenuator is controlled
using an external voltage or through the SPI-compatible
interface using an on-chip 8-bit DAC.
Because each of the three stages has its own RF input
and RF output, this component can be configured to
either optimize NF (amplifier configured first), OIP3 (ampli-
fier last), or a compromise of NF and OIP3. The device’s
performance features include 22dB amplifier gain (ampli-
fier only), 6.5dB NF at maximum gain (includes attenuator
insertion losses), and a high OIP3 level of +42dBm. Each
of these features makes the MAX2065 an ideal VGA for
numerous receiver and transmitter applications.
In addition, the MAX2065 operates from a single +5V
supply with full performance, or a single +3.3V supply
with slightly reduced performance, and has an
adjustable bias to trade current consumption for linearity
performance. This device is available in a compact 40-
pin thin QFN package (6mm x 6mm) with an exposed
pad. Electrical performance is guaranteed over the
extended temperature range (T_C = -40°C to +85°C).
Applications
IF and RF Gain Stages
Temperature Compensation Circuits
Cellular Band WCDMA and cdma2000^® Base
Stations
GSM 850/GSM 900 EDGE Base Stations
WiMAX and LTE Base Stations and Customer
Premise Equipment
Fixed Broadband Wireless Access
Wireless Local Loop
Military Systems
Video-on-Demand (VOD) and DOCSIS^®-
Compliant EDGE QAM Modulation
Cable Modem Termination Systems (CMTS)
SPI is a trademark of Motorola, Inc.
Features
♦ 50MHz to 1000MHz RF Frequency Range
♦ Pin-Compatible Family Includes:
MAX2066 (Digital VGA)
MAX2067 (Analog VGA)
♦ +19.4dB (Typ) Maximum Gain
♦ 0.5dB Gain Flatness Over 100MHz Bandwidth
♦ 62dB Gain Range (31dB Analog + 31dB Digital)
♦ Built-in DAC for Analog Attenuation Control
♦ Supports Four “Rapid-Fire” Preprogrammed
Attenuator States
Quickly Access Any One of Four Customized
Attenuation States Without Reprogramming
the SPI Bus
Ideal for Fast-Attack, High-Level Blocker Protection
Prevents ADC Overdrive Condition
♦ Excellent Linearity (Configured with Amplifier
Last)
+42dBm OIP3
+63dBm OIP2
+19dBm Output 1dB Compression Point
-67dBc HD2
-83dBc HD3
♦ 6.5dB Typical Noise Figure (NF)
♦ Fast, 25ns Digital Switching
♦ Very Low Digital VGA Amplitude Overshoot/
Undershoot
♦ Single +5V Supply (Optional +3.3V Operation)
♦ External Current-Setting Resistors Provide Option
for Operating Device in Reduced-Power/
Reduced-Performance Mode
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAX2065ETL+ -40°C to +85°C 40 Thin QFN-EP*
MAX2065ETL+T -40°C to +85°C 40 Thin QFN-EP*
+Denotes a lead-free package.
*EP = Exposed pad.
T = Tape and reel.
PKG
CODE
T4066-3
T4066-3
Pin Configuration appears at end of data sheet.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
DOCSIS and CableLabs are registered trademarks of Cable
Television Laboratories, Inc. (CableLabs®).
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.