Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsMAX2057ETX+

General Description

The MAX2057 general-purpose, high-performance vari-

able-gain amplifier (VGA) is designed to operate in the

1300MHz to 2700MHz frequency range*. This device

features 15.5dB of gain, 6dB of noise figure, and an out-

put 1dB compression point of 23.8dBm. The MAX2057

also provides an exceptionally high OIP3 level of

37dBm, which is maintained over the entire attenuation

range. In addition, the on-chip analog attenuators yield

infinite control and high attenuation accuracy over

selectable 21dB or 42dB control ranges. Each of these

features makes the MAX2057 an ideal VGA for

DCS/PCS, cdma2000™, W-CDMA, and PHS/PAS trans-

mitter and power amplifier AGC circuits.

The MAX2057 is pin compatible with the MAX2056

800MHz to 1000MHz VGA, making this family of ampli-

fiers ideal for applications where a common PC board

layout is used for both frequency bands.

The MAX2057 operates from a single +5V supply and is

available in a compact 36-pin thin QFN package (6mm

x 6mm x 0.8mm) with an exposed pad. Electrical per-

formance is guaranteed over the extended -40°C to

+85°C temperature range.

Applications

DCS 1800/PCS 1900 2G and 2.5G EDGE Base-

Station Transmitters and Power Amplifiers

cdmaOne™, cdma2000, Base-Station

Transmitters and Power Amplifiers

WCDMA, LTE, TD-SCDMA, and TD-LTE

Transmitters and Power Amplifiers

PHS/PAS Base-Station Transmitters and Power

Amplifiers

Transmitter Gain Control

Receiver Gain Control

Broadband Systems

Automatic Test Equipment

Digital and Spread-Spectrum Communication

Systems

Microwave Terrestrial Links

cdmaOne is a trademark of CDMA Development Group.

cdma2000 is a registered trademark of Telecommunications

Industry Association.

Features

o 1300MHz to 2700MHz RF Frequency Range*

o 37dBm Constant OIP3 (Over All Gain Settings)

o 23.8dBm Output 1dB Compression Point

o 15.5dB Typical Gain at Maximum Gain Setting

o 0.5dB Gain Flatness Over 100MHz Bandwidth

o 6dB Noise Figure at Maximum Gain Setting (Using

1 Attenuator)

o Two Gain-Control Ranges: 21dB and 42dB

o Analog Gain Control

o Single +5V Supply Voltage

o Pin Compatible with MAX2056, 800MHz to

1000MHz RF VGA

o External Current-Setting Resistors Provide Option

for Operating VGA in Reduced-Power/Reduced-

Performance Mode

o Lead-Free Package Available

Note: Operation beyond this range is possible, but has not been

characterized.

MAX2057

1300MHz to 2700MHz Variable-Gain

Amplifier with Analog Gain Control

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-3510; Rev 1; 12/10

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.

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE

MAX2057ETX+ -40°C to +85°C

36 Thin QFN-EP**

6mm x 6mm

MAX2057ETX+T -40°C to +85°C

36 Thin QFN-EP**

6mm x 6mm

EP = Exposed pad.

Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape-and-reel package.

Pin Configuration/Functional Diagram appear at end of data

sheet.

Summary of content (13 pages)

PAGE 1
9-3510; Rev 1; 12/10 KIT ATION EVALU E L B AVAILA 1300MHz to 2700MHz Variable-Gain Amplifier with Analog Gain Control The MAX2057 general-purpose, high-performance variable-gain amplifier (VGA) is designed to operate in the 1300MHz to 2700MHz frequency range*. This device features 15.5dB of gain, 6dB of noise figure, and an output 1dB compression point of 23.8dBm. The MAX2057 also provides an exceptionally high OIP3 level of 37dBm, which is maintained over the entire attenuation range.
PAGE 2
MAX2057 1300MHz to 2700MHz Variable-Gain Amplifier with Analog Gain Control ABSOLUTE MAXIMUM RATINGS θJA (2.5m/s airflow) ..........................................................29°C/W θJC (junction to exposed pad) .........................................10°C/W Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ......................................................
PAGE 3
1300MHz to 2700MHz Variable-Gain Amplifier with Analog Gain Control (Typical Operating Circuit with one attenuator connected, VCC = +4.75V to +5.25V, TA = -40°C to +85°C, fIN = 1700MHz to 2500MHz, unless otherwise noted. Typical values are at VCC = +5.0V, R1 = 1.2kΩ, R2 = 2kΩ, POUT = +5dBm, fIN = 2100MHz, VCNTL = 1V, 50Ω system impedance, second attenuator is not connected, TA = +25°C, unless otherwise noted.
PAGE 4
Typical Operating Characteristics One Attenuator Configuration (Typical Application Circuit with one attenuator connected, VCC = +5.0V, R1 = 1.2kΩ, R2 = 2kΩ, fIN = 2100MHz, maximum gain setting, POUT = +5dBm, linearity measured at POUT = +5dBm/tone, TA = +25°C, unless otherwise noted.) OUTPUT RETURN LOSS INPUT RETURN LOSS SUPPLY CURRENT vs. RF FREQUENCY vs. RF FREQUENCY vs. SUPPLY VOLTAGE TA = +25°C 160 TA = -40°C 20 25 30 TA = +25°C 5.000 5.250 5.
PAGE 5
1300MHz to 2700MHz Variable-Gain Amplifier with Analog Gain Control One Attenuator Configuration (Typical Application Circuit with one attenuator connected, VCC = +5.0V, R1 = 1.2kΩ, R2 = 2kΩ, fIN = 2100MHz, maximum gain setting, POUT = +5dBm, linearity measured at POUT = +5dBm/tone, TA = +25°C, unless otherwise noted.) REVERSE ISOLATION vs. RF FREQUENCY 7.5 7.0 35 MAXIMUM GAIN 6.5 6.0 TA = +25°C 5.5 30 5.0 25 4.5 2100 2300 1700 OUTPUT IP3 vs.
PAGE 6
Typical Operating Characteristics (continued) One Attenuator Configuration (Typical Application Circuit with one attenuator connected, VCC = +5.0V, R1 = 1.2kΩ, R2 = 2kΩ, fIN = 2100MHz, maximum gain setting, POUT = +5dBm, linearity measured at POUT = +5dBm/tone, TA = +25°C, unless otherwise noted.) 70 MAX2057 toc20 MAX2057 toc19 VCC = 4.75V VCC = 5.00V 70 OUTPUT IP2 vs. ATTENUATION INPUT IP2 vs. ATTENUATION 70 65 MAX2057 toc21 OUTPUT IP2 vs.
PAGE 7
1300MHz to 2700MHz Variable-Gain Amplifier with Analog Gain Control Two Attenuator Configuration (Typical Application Circuit with two attenuators connected, VCC = +5.0V, R1 = 1.2kΩ, R2 = 2kΩ, fIN = 2100MHz, maximum gain setting, POUT = +5dBm, linearity measured at POUT = +5dBm/tone, TA = +25°C, unless otherwise noted.) INPUT RETURN LOSS vs. RF FREQUENCY OUTPUT RETURN LOSS vs.
PAGE 8
Typical Operating Characteristics (continued) Two Attenuator Configuration (Typical Application Circuit with two attenuators connected, VCC = +5.0V, R1 = 1.2kΩ, R2 = 2kΩ, fIN = 2100MHz, maximum gain setting, POUT = +5dBm, linearity measured at POUT = +5dBm/tone, TA = +25°C, unless otherwise noted.) TA = -40°C TA = +25°C MAXIMUM GAIN 6dB GAIN REDUCTION 10 15 20 25 30 12dB, 18dB, 24dB, 30dB GAIN REDUCTION 35 30 5 2100 2500 2300 1500 1700 1900 2100 RF FREQUENCY (MHz) GAIN vs.
PAGE 9
1300MHz to 2700MHz Variable-Gain Amplifier with Analog Gain Control PIN NAME FUNCTION 1, 3, 4, 6, 7, 9, 10, 12, 14, 18, 19, 21–24, 27, 28, 30, 31, 33, 34, 36 GND 2 OUT_A 5, 13, 16, 25, 32 VCC Power Supply. Bypass each pin to GND with capacitors as shown in the Typical Application Circuit. Place capacitors as close to the pin as possible. 8 IN_A Second-Attenuator Input. Internally matched to 50 over the operating frequency band.
PAGE 10
MAX2057 1300MHz to 2700MHz Variable-Gain Amplifier with Analog Gain Control VCC GND GND C1 IN_A GND GND GND GND VCC GND 26 EP 3 25 MAX2057 4 24 5 23 6 22 ATTENUATION CONTROL CIRCUITRY 7 21 8 20 9 19 11 GND VCNTL 10 12 13 14 15 16 17 GND AMP_IN VCC VCC C6 C13 GND GND GND GND C7 RF OUTPUT OUT GND 0.
PAGE 11
1300MHz to 2700MHz Variable-Gain Amplifier with Analog Gain Control DESIGNATION VALUE TYPE C1, C3, C5, C7, C10 22pF Microwave capacitors (0402) C2, C4, C6, C8, C9 1000pF Microwave capacitors (0402) C13, C14, C15 0.1µF Microwave capacitors (0603) C17 0.75pF Microwave capacitor (0402) R1 1.2kΩ ±1% resistor (0402) R2 2kΩ ±1% resistor (0402) Applications Information Analog Attenuation Control A single input voltage at the VCNTL pin adjusts the gain of the MAX2057.
PAGE 12
Pin Configuration/ Functional Diagram GND 1 OUT_A 2 GND GND IN GND GND VCC GND GND ATTN_OUT GND 36 35 34 33 32 31 30 29 28 27 GND 26 AMP_IN EP 3 25 VCC MAX2057 GND 4 24 GND VCC 5 23 GND GND 6 GND PROCESS: BiCMOS For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only.
PAGE 13
00MHz to 2700MHz Variable-Gain Amplifier with Analog Gain Control REVISION NUMBER REVISION DATE 0 1/05 Initial release 12/10 Updated General Description, Features, Applications, Ordering Information, DC Electrical Characteristics, AC Electrical Characteristics, Detailed Description, and Analog Attenuation Control sections, and added Recommended AC Operating Conditions section 1 DESCRIPTION PAGES CHANGED — 1, 2, 3, 10, 11 Maxim cannot assume responsibility for use of any circuitry other than cir