Maxim 公司的MAX2062是高度线性的 50MHz-1000MHz双路模/数可变增益放大器（VGA），最大增益19.4dB ，100MHz带宽的增益平坦度为0.34dB，200MHz时的通路隔离为56dB，内置的8位DAC用不来模拟衰减控制，单电源5V工作，具有极好的线性，200MHz的OIP3为41dBm，OIP2为 56dBm，1dB压缩点为19dBm，主要用在IF和RF增益级，温度补偿电路，GSM/EDGE，WCDMA，TD-SCDMA和CDMA2000基站，WiMAXK，LTE和TD-LTE基站以及CPE，无线局部回路和军用系统等。本文介绍了MAX2062主要特性，典型应用电路及所用材料清单。

 The MAX2062 high-linearity， dual analog/digital variablegain amplifier (VGA) operates in the 50MHz to 1000MHz frequency range with two independent attenuators in each signal path. Each digital attenuator is controlled as a slave peripheral using either the SPIK-compatible interface， or a 5-bit parallel bus with 31dB total adjustment range in 1dB steps. An added feature allows rapid-fire gain selection among each of the four steps， preprogrammed by the user through the SPI-compatible interface. A separate 2-pin control lets the user quickly access any one of four customized attenuation states without reprogramming the SPI bus. Each analog attenuator is controlled using an external voltage or through the SPI-compatible interface using an on-chip 8-bit DAC.

 Since each of the stages has its own external RF input and RF output， this component can be configured to either optimize noise figure (NF) (amplifier configured first)， OIP3 (amplifier last)， or a compromise of NF and OIP3. The device’s performance features include 24dB amplifier gain (amplifier only)， 7.3dB NF at maximum gain (includes attenuator insertion losses)， and a high OIP3 level of +41dBm. Each of these features makes the device an ideal VGA for multipath receiver and transmitter applications.

 In addition， the device operates from a single +5V supply with full performance or a +3.3V supply for an enhanced power-savings mode with lower performance.

 The device is available in a compact 48-pin TQFN package (7mm x 7mm) with an exposed pad. Electrical performance is guaranteed over the extended temperature range， from TC = -40NC to +85NC.

 MAX2062主要特性：

Independently Controlled Dual Paths

50MHz to 1000MHz RF Frequency Range

Pin-Compatible Family Includes

MAX2063 (Digital-Only VGA)

MAX2064 (Analog-Only VGA)

19.4dB (typ) Maximum Gain

0.34dB Gain Flatness Over 100MHz Bandwidth

64dB Gain Range (33dB Analog Plus 31dB Digital)

56dB Path Isolation (at 200MHz)

Built-In 8-Bit DACs for Analog Attenuation Control

Supports Four Rapid-Fire Preprogrammed

Attenuator States

Quickly Access Any One of Four Customized

Attenuator States

Ideal for Fast-Attack， High-Level Blocker

Protection

Protects ADC Overdrive Condition

Excellent Linearity (Configured with Amp Last at 200MHz)

+41dBm OIP3

+56dBm OIP2

+19dBm Output 1dB Compression Point

7.3dB Typical Noise Figure (at 200MHz)

Fast， 25ns Digital Switching

Very Low Digital VGA Amplitude Overshoot/ Undershoot

Single +5V Supply (or +3.3V Operation)

Amplifier Power-Down Mode for TDD Applications

MAX2062应用：

IF and RF Gain Stages

Temperature-Compensation Circuits

GSM/EDGE Base Stations

WCDMA， TD-SCDMA， and cdma2000M Base Stations

WiMAXK， LTE， and TD-LTE Base Stations and Customer-Premise Equipment

Fixed Broadband Wireless Access

Wireless Local Loop

Military Systems

Typical Application Circuit
Typical Application Circuit Component Values