Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsMAX2066ETL+

General Description

The MAX2066 high-linearity digital variable-gain amplifi-

er (VGA) is a monolithic SiGe BiCMOS attenuator and

amplifier designed to interface with 50Ω systems oper-

ating in the 50MHz to 1000MHz frequency range (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 attenua-

tion states without reprogramming the SPI bus.

Because each stage has its own RF input and RF output,

this component can be configured to either optimize NF

(amplifier configured first), or OIP3 (amplifier last). The

device’s performance features include 22dB amplifier

gain (amplifier only), 5.2dB NF at maximum gain (includes

attenuator insertion loss), and a high OIP3 level of

+42.4dBm. Each of these features makes the MAX2066

an ideal VGA for numerous receiver and transmitter

applications.

In addition, the MAX2066 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

= -40°C to +85°C).

Applications

IF and RF Gain Stages

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)

RFID Handheld and Portal Readers

Features

♦ 50MHz to 1000MHz RF Frequency Range

♦ Pin-Compatible Family Includes

MAX2065 (Analog/Digital VGA)

MAX2067 (Analog VGA)

♦ 20.5dB (typ) Maximum Gain

♦ 0.4dB Gain Flatness Over 100MHz Bandwidth

♦ 31dB Gain Range

♦ 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)

+42.4dBm OIP3

+65dBm OIP2

+19dBm Output 1dB Compression Point

-68dBc HD2

-88dBc HD3

♦ 5.2dB 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

MAX2066

50MHz to 1000MHz High-Linearity,

Serial/Parallel-Controlled Digital VGA

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-4057; Rev 0; 3/08

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.

Denotes a lead-free package.

EP = Exposed pad.

T = Tape and reel.

cdma2000 is a registered trademark of Telecommunications

Industry Association.

DOCSIS and CableLabs are registered trademarks of Cable

Television Laboratories, Inc. (CableLabs®).

PART TEMP RANGE

PIN-

PACKAGE

MAX2066ETL+ -40°C to +85°C 40 Thin QFN-EP*

MAX2066ETL+T -40°C to +85°C 40 Thin QFN-EP*

SPI is a trademark of Motorola, Inc.

Pin Configuration appears at end of data sheet.

Summary of content (23 pages)

PAGE 1
9-4057; Rev 0; 3/08 50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA The MAX2066 high-linearity digital variable-gain amplifier (VGA) is a monolithic SiGe BiCMOS attenuator and amplifier designed to interface with 50Ω systems operating in the 50MHz to 1000MHz frequency range (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.
PAGE 2
MAX2066 50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA ABSOLUTE MAXIMUM RATINGS VCC_ to GND ........................................................-0.3V to +5.5V VDD_LOGIC, DATA, CS, CLK, SER/PAR..............................................-0.3V to (VCC_ + 0.3V) STATE_A, STATE_B, D0–D4 ....................-0.3V to (VCC_ + 0.3V) AMP_IN, AMP_OUT .................................-0.3V to (VCC_ + 0.3V) ATTEN_IN, ATTEN_OUT........................................-1.2V to +1.
PAGE 3
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA (Typical Application Circuit, VCC = VDD = +3.0V to +3.6V, TC = -40°C to +85°C. Typical values are at VCC = VDD = +3.3V, HC mode with attenuator set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, unless otherwise noted.
PAGE 4
MAX2066 50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA +5V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, VCC = VDD = +4.75 to +5.25V, HC mode with attenuator set for maximum gain, 50MHz ≤ fRF ≤ 1000MHz, TC = -40°C to +85°C. Typical values are at VCC = VDD = +5.0V, HC mode, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, unless otherwise noted.) (Note 6) PARAMETER MIN TYP fRF = 350MHz, TC = +25°C (Note 5, 8) 17 18.
PAGE 5
0MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA 22 20 19 18 TC = +85°C 5.000 5.125 17 16 16 15 50 250 450 650 850 50 1050 250 450 650 850 VCC (V) RF FREQUENCY (MHz) RF FREQUENCY (MHz) GAIN OVER ATTENUATOR SETTING vs. RF FREQUENCY ATTENUATOR RELATIVE ERROR vs. RF FREQUENCY ATTENUATOR ABSOLUTE ERROR vs. RF FREQUENCY 5 0.50 0.25 0 -0.25 -0.50 450 650 850 50 1050 -0.25 -0.50 -0.75 -1.00 -1.25 -1.75 -2.00 -1.00 250 0.25 0 -1.50 -0.
PAGE 6
Typical Operating Characteristics (continued) (VCC = VDD = +5.0V, HC mode, digital attenuator set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, unless otherwise noted.) 20 10 -10 MAX2066 toc11 7 8 VCC = 4.75V, 5.00V, 5.25V 6 5 TC = +25°C 50 250 450 650 TC = -40°C 3 REFERENCED TO HIGH GAIN STATE POSITIVE PHASE = ELECTRICALLY SHORTER 250 450 650 50 1050 850 250 OUTPUT P1dB vs. RF FREQUENCY 21 MAX2066 toc13 TC = +85°C 20 VCC = 5.25V TC = -40°C 19 VCC = 5.
PAGE 7
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA 2nd HARMONIC vs. ATTENUATOR STATE VCC = 4.75V 50 69 68 TC = +25°C 67 100 65 40 450 650 850 4 8 24 28 32 50 TC = -40°C 85 TC = +25°C 55 50 TC = +85°C 45 40 0 1050 60 TC = +25°C 80 TC = -40°C 850 4 8 12 16 20 24 28 32 50 250 ATTENUATOR STATE (dB) RF FREQUENCY (MHz) MAX2066 toc25 68 VCC = 5.25V 60 55 POUT = 0dBm/TONE fRF = 200MHz TC = -40°C 66 OIP2 (dBm) VCC = 5.00V 650 850 1050 OIP2 vs.
PAGE 8
Typical Operating Characteristics (continued) (VCC = VDD = +5.0V, digital attenuator only, maximum gain, PIN = -20dBm and TC = +25°C, unless otherwise noted.) GAIN vs. RF FREQUENCY (ATTENUATOR ONLY) GAIN vs. RF FREQUENCY (ATTENUATOR ONLY) -1 MAX2066 toc28 0 MAX2066 toc27 0 -1 TC = -40°C -2 VCC = 4.75V, 5.00V, 5.
PAGE 9
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA 20 19 17 TC = +25°C 16 55 4.750 5.000 5.125 250 450 650 850 50 1050 250 450 650 INPUT MATCH OVER ATTENUATOR SETTING vs. RF FREQUENCY (LOW-CURRENT MODE) OUTPUT MATCH OVER ATTENUATOR SETTING vs. RF FREQUENCY (LOW-CURRENT MODE) NOISE FIGURE vs.
PAGE 10
Typical Operating Characteristics (continued) (VCC = VDD = +5.0V, LC mode, digital attenuator set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, unless otherwise noted.) VCC = 5.00V 40 OUTPUT IP3 (dBm) TC = -40°C 35 TC = +85°C 43 35 VCC = 4.75V 30 30 250 450 850 650 39 TC = +25°C USB TC = +85°C USB TC = +85°C LSB 250 450 650 850 0 1050 4 8 12 16 20 24 28 32 RF FREQUENCY (MHz) RF FREQUENCY (MHz) ATTENUATOR STATE (dB) 2nd HARMONIC vs.
PAGE 11
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA OIP2 vs. RF FREQUENCY (LOW-CURRENT MODE) 70 75 POUT = 0dBm/TONE 70 POUT = 0dBm/TONE fRF = 200MHz TC = -40°C 68 65 TC = -40°C 60 TC = +25°C 55 50 VCC = 5.25V 60 VCC = 5.00V 55 66 64 VCC = 4.75V 50 TC = +85°C OIP2 (dBm) OIP2 (dBm) 65 OIP2 (dBm) 70 MAX2066 toc49 POUT = 0dBm/TONE MAX2066 toc47 75 OIP2 vs. ATTENUATOR STATE (LOW-CURRENT MODE) MAX2066 toc48 OIP2 vs.
PAGE 12
Typical Operating Characteristics (continued) (VCC = VDD = +3.3V, HC mode, digital attenuator set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. SUPPLY VOLTAGE TC = -40°C 19 3.30 3.45 3.60 15 50 250 650 850 1050 VCC (V) RF FREQUENCY (MHz) INPUT MATCH OVER ATTENUATOR SETTING vs. RF FREQUENCY OUTPUT MATCH OVER ATTENUATOR SETTING vs.
PAGE 13
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA OUTPUT IP3 vs. RF FREQUENCY 30 40 VCC = 3.3V VCC = 3.6V 35 30 TC = +25°C LSB 39 38 37 36 TC = -40°C LSB TC = -40°C USB TC = +85°C USB VCC = 3.0V 25 TC = +85°C LSB 35 25 TC = +85°C 34 20 20 450 650 850 50 1050 250 2nd HARMONIC vs. RF FREQUENCY 1050 0 TC = +25°C 60 50 70 30 VCC = 3.6V 60 50 650 850 1050 28 32 VCC = 3.
PAGE 14
Typical Operating Characteristics (continued) (VCC = VDD = +3.3V, HC mode, digital attenuator set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, unless otherwise noted.) 3rd HARMONIC vs. ATTENUATOR STATE VCC = 3.3V POUT = 0dBm/TONE TC = +85°C 60 MAX2068 toc68 VCC = 3.3V fRF = 200MHz POUT = 3dBm 80 TC = +85°C TC = +25°C OIP2 (dBm) 50 75 TC = -40°C 40 TC = -40°C TC = +25°C 30 70 0 4 8 12 16 20 24 28 32 50 250 450 ATTENUATOR STATE (dB) OIP2 vs.
PAGE 15
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA PIN NAME 1, 16, 19, 22, 24–28, 30, 31, 33–36 GND Ground 2, 3, 32, 37–40 GND Ground. See the Pin-Compatibility Considerations section. 4 DATA SPI Data Digital Input 5 CLK SPI Clock Digital Input 6 CS SPI Chip-Select Digital Input 7 VDD_LOGIC 8 SER/PAR 9 STATE_A 10 STATE_B DESCRIPTION Digital Logic Supply Input. Connect to the digital logic power supply, VDD.
PAGE 16
MAX2066 50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA Detailed Description The MAX2066 high-linearity digital variable-gain amplifier is a general-purpose, high-performance amplifier designed to interface with 50Ω systems operating in the 50MHz to 1000MHz frequency range. The MAX2066 integrates a digital attenuator to provide 31dB of gain control, as well as a driver amplifier optimized to provide high gain, high IP3, low noise figure, and low power consumption.
PAGE 17
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA MAX2066 MSB LSB DN DATA D(N - 1) D1 D0 CLOCK tCW tCS tCH CS tES tEWS tEW Figure 1. SPI Timing Diagram Table 2.
PAGE 18
MAX2066 50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA Table 2. SPI Data Format (continued) FUNCTION BIT DESCRIPTION D7 D6 D5 Reserved D4 Bits D[7:0] are reserved. Set to logic 0. D3 D2 D1 D0 (LSB) Digital Attenuator Settings Using the Parallel Control Bus To capitalize on its fast 25ns switching capability, the MAX2066 offers a supplemental 5-bit parallel control interface. The digital logic attenuator-control pins (D0–D4) enable the attenuator stages (Table 3).
PAGE 19
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA Table 4. Preprogrammed Attenuation State Settings STATE_A STATE_B DIGITAL ATTENUATOR 0 0 Preprogrammed attenuation state 1 1 0 Preprogrammed attenuation state 2 0 1 Preprogrammed attenuation state 3 1 1 Preprogrammed attenuation state 4 Layout Considerations The pin configuration of the MAX2066 has been optimized to facilitate a very compact physical layout of the device and its associated discrete components.
PAGE 20
MAX2066 50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA Table 6. Typical Application Circuit Component Values (HC Mode) DESIGNATION VALUE SIZE VENDOR DESCRIPTION C1, C2, C7 10nF 0402 Murata Mfg. Co., Ltd. X7R C3, C4, C6, C8, C9 1000pF 0402 Murata Mfg. Co., Ltd. C0G ceramic capacitors L1 470nH 1008 Coilcraft, Inc. 1008CS-471XJLC R1, R1A 10Ω 0402 Vishay 1% R2 (+3.3V applications only) 1kΩ 0402 Panasonic Corp. 1% R3 (+3.
PAGE 21
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA GND GND GND GND GND GND GND GND DIGITAL ATTENUATOR MAX2066 4 5 6 7 8 27 26 25 24 23 DRIVER AMP 9 22 10 21 12 13 14 15 16 17 18 19 GND ATTEN_IN C9 RF INPUT GND GND GND GND GND ATTEN_OUT C8 GND VCC VCC_AMP 20 AMP_IN 11 GND STATE_B 31 28 RSET STATE_A 32 3 AMP_OUT SER/PAR 33 29 D4 C1 34 GND VDD_LOGIC 35 2 D0 CS VDD 36 30 D1 CLK 37 EP D2 DATA 38 39 SPI INTERFACE GND 40 1 D3
PAGE 22
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA MAX2066 Pin Configuration/Functional Block Diagram GND GND GND GND GND GND GND GND GND + GND TOP VIEW 40 39 38 37 36 35 34 33 32 31 GND 1 30 GND GND 2 29 ATTEN_IN GND 3 28 GND DATA 4 DIGITAL ATTENUATOR MAX2066 CLK 5 SPI INTERFACE CS 6 VDD_LOGIC 7 SER/PAR 8 27 GND 26 GND 25 GND 24 GND 23 ATTEN_OUT DRIVER AMP STATE_A 9 22 GND 15 16 17 18 19 20 AMP_OUT RSET GND AMP_IN D2 14 GND 13 D0 12
PAGE 23
50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA MAX2066 Package Information For the latest package outline information, go to www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 40 Thin QFN-EP T4066-3 21-0141 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.