Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsMAX2065ETL+

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

= -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)

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

MAX2065

50MHz to 1000MHz High-Linearity, Serial/

Parallel-Controlled Analog/Digital VGA

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-3131; 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

PKG

CODE

MAX2065ETL+ -40°C to +85°C 40 Thin QFN-EP* T4066-3

M AX 2065E TL+ T -40°C to +85°C 40 Thin QFN-EP* T4066-3

SPI is a trademark of Motorola, Inc.

Pin Configuration appears at end of data sheet.

Summary of content (27 pages)

PAGE 1
9-3131; Rev 0; 3/08 50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA The MAX2065 high-linearity, analog/digital variablegain amplifier (VGA) is designed to operate in the 50MHz to 1000MHz frequency range with two independent 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.
PAGE 2
MAX2065 50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA ABSOLUTE MAXIMUM RATINGS VCC_ to GND ........................................................-0.3V to +5.5V VDD_LOGIC, DATA, CS, CLK, SER/PAR, VDAC_EN, VREF_SELECT.....................................-0.3V to (VCC_ + 0.3V) STATE_A, STATE_B, D0–D4 ....................-0.3V to (VCC_ + 0.3V) AMP_IN, AMP_OUT, VREF_IN, ANALOG_VCTRL ................................-0.3V to (VCC_ + 0.
PAGE 3
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA (Typical Application Circuit, VCC = +3.0V to +3.6V, TC = -40°C to +85°C. Typical values are at VCC = +3.3V, HC mode with attenuators set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25oC, unless otherwise noted.
PAGE 4
MAX2065 50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA +5V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, VCC = +4.75 to +5.25V, HC mode with each attenuator set for maximum gain, 50MHz ≤ fRF ≤ 1000MHz, TC = -40°C to +85°C. Typical values are at VCC = +5.0V, HC mode, PIN = -20dBm, fRF = 200MHz, and TC = +25oC, unless otherwise noted.) (Note 5) PARAMETER MIN TYP 350MHz, TC = +25°C (Note 8) 17 18.
PAGE 5
0MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA (Typical Application Circuit, VCC = +4.75 to +5.25V, HC mode with each attenuator set for maximum gain, 50MHz ≤ fRF ≤ 1000MHz, TC = -40°C to +85°C. Typical values are at VCC = +5.0V, HC mode, PIN = -20dBm, fRF = 200MHz, and TC = +25oC, unless otherwise noted.
PAGE 6
Typical Operating Characteristics (VCC = +5.0V, HC mode, both attenuators set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, internal DAC reference used, unless otherwise noted.) TC = -40°C 130 120 19 21 20 TC = +25°C GAIN (dB) TC = +25°C GAIN (dB) 18 TC = +85°C 16 TC = +85°C 5.000 5.125 5.250 250 450 650 850 50 1050 450 650 850 RF FREQUENCY (MHz) GAIN OVER DIGITAL ATTENUATOR SETTING vs. RF FREQUENCY DIGITAL ATTENUATOR RELATIVE ERROR vs.
PAGE 7
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA MAX2065 toc11 12 DAC CODE 32 7 DAC CODE 64 2 -3 10 REFERENCED TO HIGH GAIN STATE POSITIVE PHASE = ELECTRICALLY SHORTER 50 250 450 650 7 2 1000MHz 450MHz -3 DAC CODE 128 DAC CODE 256 -8 -8 -13 -13 -18 -18 50 1050 850 200MHz 250 450 650 0 1050 850 32 64 96 224 256 128 160 192 RF FREQUENCY (MHz) RF FREQUENCY (MHz) DAC CODE GAIN vs. ANALOG ATTENUATOR SETTING GAIN vs.
PAGE 8
Typical Operating Characteristics (continued) (VCC = +5.0V, HC mode, both attenuators set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, internal DAC reference used, unless otherwise noted.) 8 7 6 VCC = 5.00V 7 VCC = 5.25V 6 TC = -40°C 5 450 650 1050 850 50 250 RF FREQUENCY (MHz) OUTPUT P1dB vs. RF FREQUENCY 650 850 50 1050 250 MAX2065 toc22 50 POUT = 0dBm/TONE 17 VCC = 4.75V 850 1050 POUT = 0dBm/TONE 45 OUTPUT IP3 (dBm) OUTPUT IP3 (dBm) 18 650 OUTPUT IP3 vs.
PAGE 9
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA VCC = 4.75V 70 TC = +25°C TC = +85°C 65 50 TC = +25°C 70 65 TC = +85°C 250 50 450 650 0 1050 4 8 16 20 24 28 0 32 64 96 128 160 192 224 256 DAC CODE 3rd HARMONIC vs. RF FREQUENCY 3rd HARMONIC vs. RF FREQUENCY 3rd HARMONIC vs. DIGITAL ATTENUATOR STATE 80 70 60 MAX2065 toc32 VCC = 5.25V VCC = 5.00V 90 80 70 TC = -40°C 100 VCC = 4.
PAGE 10
Typical Operating Characteristics (continued) (VCC = +5.0V, HC mode, both attenuators set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, internal DAC reference used, unless otherwise noted.) POUT = -3dBm/TONE RF = 200MHz TC = +25°C MAX2065 toc37 TC = -40°C 70 OIP2 vs. ANALOG ATTENUATOR STATE 75 70 TC = +25°C 65 OIP2 (dBm) OIP2 (dBm) 65 60 55 POUT = -3dBm/TONE RF = 200MHz TC = -40°C MAX2065 toc38 OIP2 vs.
PAGE 11
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA GAIN vs. RF FREQUENCY (DIGITAL ATTENUATOR ONLY) MAXIMUM GAIN SETTING MAXIMUM GAIN SETTING -1 TC = -40°C VCC = 5.25V TC = +25°C -2 GAIN (dB) GAIN (dB) -1 0 MAX2065 toc43 0 MAX2065 toc44 GAIN vs. RF FREQUENCY (DIGITAL ATTENUATOR ONLY) -3 -2 -3 VCC = 5.00V -4 -4 VCC = 4.75V TC = +85°C -5 250 450 650 850 1050 450 650 850 GAIN vs. RF FREQUENCY (ANALOG ATTENUATOR ONLY) GAIN vs.
PAGE 12
Typical Operating Characteristics (continued) (VCC = +5.0V, LC mode, both attenuators set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, internal reference used, unless otherwise noted.) TC = -40°C TC = +25°C TC = +85°C TC = +85°C 16 15 5.000 5.125 50 250 450 650 850 50 1050 250 450 650 850 1050 RF FREQUENCY (MHz) RF FREQUENCY (MHz) INPUT MATCH OVER DIGITAL ATTENUATOR SETTING vs. RF FREQUENCY OUTPUT MATCH OVER DIGITAL ATTENUATOR SETTING vs.
PAGE 13
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA 15 14 TC = +25°C VCC = 5.00V 40 OUTPUT IP3 (dBm) 16 VCC = 5.25V 17 OUTPUT P1dB (dBm) TC = +25°C 45 MAX2065 toc57 TC = -40°C OUTPUT P1dB (dBm) 18 MAX2065 toc56 18 17 OUTPUT IP3 vs. RF FREQUENCY (LOW CURRENT MODE) OUTPUT P1dB vs. RF FREQUENCY (LOW CURRENT MODE) MAX2065 toc58 OUTPUT P1dB vs. RF FREQUENCY (LOW CURRENT MODE) VCC = 4.
PAGE 14
Typical Operating Characteristics (continued) (VCC = +5.0V, LC mode, both attenuators set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, internal reference used, unless otherwise noted.) 65 TC = +25°C 80 70 64 96 80 VCC = 4.75V 60 32 VCC = 5.00V TC = +85°C 60 0 VCC = 5.25V 90 70 TC = -40°C TC = +85°C 128 160 192 224 256 60 250 50 450 650 850 1050 250 50 450 650 RF FREQUENCY (MHz) RF FREQUENCY (MHz) 3rd HARMONIC vs.
PAGE 15
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA GAIN vs. RF FREQUENCY TC = -40°C 20 VCC = 3.6V 19 19 VCC = 3.0V TC = +25°C 18 GAIN (dB) 17 TC = +25°C TC = +85°C TC = +85°C 14 13 3.00 3.15 3.30 3.45 3.60 VCC = 3.3V 15 14 45 17 16 16 55 18 13 50 250 450 650 850 1050 50 250 450 650 850 1050 VCC (V) RF FREQUENCY (MHz) RF FREQUENCY (MHz) INPUT MATCH OVER DIGITAL ATTENUATOR SETTING vs.
PAGE 16
Typical Operating Characteristics (continued) (VCC = +3.3V, HC mode, both attenuators set for maximum gain, PIN = -20dBm, fRF = 200MHz, and TC = +25°C, internal DAC reference used, unless otherwise noted.) OUTPUT P1dB vs. RF FREQUENCY 13 TC = +85°C 14 13 12 11 10 10 9 9 250 450 650 850 1050 TC = -40°C 35 30 VCC = 3.0V 25 TC = +85°C 20 250 50 450 650 850 1050 50 250 450 650 OUTPUT IP3 vs. DIGITAL ATTENUATOR STATE OUTPUT IP3 vs.
PAGE 17
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA 3rd HARMONIC vs. RF FREQUENCY TC = +85°C 40 80 70 64 96 128 160 192 224 256 50 250 450 650 850 3rd HARMONIC vs. DIGITAL ATTENUATOR STATE 3rd HARMONIC vs. ANALOG ATTENUATOR STATE MAX2065 toc95 75 60 80 16 20 24 28 TC = -40°C 32 64 96 128 160 192 224 256 50 250 DAC CODE 70 MAX2065 toc98 POUT = 0dBm/TONE POUT = 0dBm/TONE RF = 200MHz TC = +85°C VCC = 3.
PAGE 18
MAX2065 50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA Pin Description PIN NAME 1, 16, 19, 22, 24–28, 30, 31, 33–36 GND 2 VREF_SELECT 3 VDAC_EN 4 DATA 5 CLK SPI Clock Digital Input 6 CS SPI Chip-Select Digital Input 7 VDD_LOGIC 8 SER/PAR Digital Attenuator SPI or Parallel Control Selection Logic Input. Logic 0 = parallel control, Logic 1 = serial control.
PAGE 19
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA The MAX2065 high-linearity analog/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 MAX2065 integrates one digital attenuator and one analog attenuator to provide 62dB of total gain control, as well as a driver amplifier optimized to provide high gain, high IP3, low noise figure, and low power consumption.
PAGE 20
MAX2065 50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA MSB LSB DN DATA D(N-1) D1 D0 CLOCK tCW tCS tCH CS tES tEWS tEW Figure 1. MAX2065 SPI Timing Diagram Table 2.
PAGE 21
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA MAX2065 Table 2.
PAGE 22
MAX2065 50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA The user can employ the STATE_A and STATE_B logicinput pins to apply each step as required (Table 4). Toggling just the STATE_A pin (one control bit) yields two preprogrammed attenuation states; toggling both the STATE_A and STATE_B pins together (two control bits) yield four preprogrammed attenuation states.
PAGE 23
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA DESIGNATION VALUE SIZE VENDOR DESCRIPTION C1, C2, C7, C11 10nF 0402 Murata Mfg. Co., Ltd. X7R C3, C4, C6, C8, C9, C10 1000pF 0402 Murata Mfg. Co., Ltd. C0G ceramic capacitor C12, C13 150pF 0402 Murata Mfg. Co., Ltd. C0G ceramic capacitor L1 470nH 1008 Coilcraft, Inc. 1008CS-471XJLC R1 24Ω 0402 Vishay 1% R1A 0.01µF 0402 Murata Mfg. Co., Ltd. X7R R2 (+3.
PAGE 24
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA MAX2065 Typical Application Circuit VCC C11 C12 R4 RF INPUT + STATE_B GND ATTEN1_OUT GND GND GND GND 28 DIGITAL ATTENUATOR VREF 4 5 DAC 6 7 8 27 26 25 24 23 DRIVER AMP EP 9 22 10 21 D4 11 12 13 14 15 16 17 18 19 GND ATTEN2_IN C9 GND GND GND GND GND ATTEN2_OUT C8 GND VCC VCC_AMP 20 AMP_IN STATE_A 31 30 GND SER/PAR 32 RSET C1 33 3 AMP_OUT VDD_LOGIC 34 GND CS VDD 35 29 D0 CL
PAGE 25
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA VREF_IN ANALOG_VCTRL VCC_ANALOG ATTEN1_IN GND GND GND GND ATTEN1_OUT GND 40 39 38 37 36 35 34 33 32 31 TOP VIEW + GND 1 30 GND ANALOG ATTENUATOR VREF_SELECT 2 29 ATTEN2_IN VDAC_EN 3 28 GND DATA 4 DIGITAL ATTENUATOR VREF CLK 5 DAC SPI INTERFACE CS 6 VDD_LOGIC 7 SER/PAR 8 27 GND 26 GND 25 GND 24 GND 23 ATTEN2_OUT DRIVER AMP STATE_A 9 22 GND 15 16 17 18 19 20 AMP_OUT RSET GND AMP_IN D
PAGE 26
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) QFN THIN.
PAGE 27
50MHz to 1000MHz High-Linearity, Serial/ Parallel-Controlled Analog/Digital VGA 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.