Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsMAX2027EUP+D

General Description

The MAX2027 high-performance, digitally controlled

variable-gain amplifier is designed for use from 50MHz

to 400MHz.

The device integrates a digitally controlled attenuator

and a high-linearity IF amplifier in one package.

Targeted for IF signal chains to adjust gain either

dynamically or as a one-time channel gain setting, the

MAX2027 is ideal for applications requiring high perfor-

mance. The attenuator provides 23dB of attenuation

range with ±0.05dB state-to-state accuracy.

The MAX2027 is available in a thermally enhanced 20-

pin TSSOP-EP package and operates over the -40°C to

+85°C temperature range.

Applications

Cellular Base Stations

Receiver Gain Control

Transmitter Gain Control

Broadband Systems

Automatic Test Equipment

Terrestrial Links

Features

♦ 50MHz to 400MHz Frequency Range

♦ Variable Gain: -8dB to +15dB

♦ Output IP3: 35dBm (at All Gain Settings)

♦ Noise Figure: 4.7dB at Maximum Gain

♦ Digitally Controlled Gain with 1dB Resolution and

±0.05dB State-to-State Accuracy

MAX2027

IF Digitally Controlled Variable-Gain Amplifier

________________________________________________________________ Maxim Integrated Products 1

MAX2027

ATTENUATION

LOGIC

CONTROL

AMP

BIAS

GND

ATTN

OUT

GND

RF_IN

GND

AMP

BIAS

SET

GND

RF_OUT

Pin Configuration/

Functional Diagram

Ordering Information

19-2601; Rev 1; 2/04

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE PIN-PACKAGE

MAX2027EUP-T -40°C to +85°C 20 TSSOP-EP*

*EP = exposed pad.

Summary of content (10 pages)

PAGE 1
9-2601; Rev 1; 2/04 IF Digitally Controlled Variable-Gain Amplifier Features The MAX2027 high-performance, digitally controlled variable-gain amplifier is designed for use from 50MHz to 400MHz. ♦ 50MHz to 400MHz Frequency Range The device integrates a digitally controlled attenuator and a high-linearity IF amplifier in one package. Targeted for IF signal chains to adjust gain either dynamically or as a one-time channel gain setting, the MAX2027 is ideal for applications requiring high performance.
PAGE 2
MAX2027 IF Digitally Controlled Variable-Gain Amplifier ABSOLUTE MAXIMUM RATINGS All Pins Input Voltage (except AMPIN, IBIAS, and ISET) to GND................................................................-0.3V to +5.5V Input Voltage Levels (B0–B4).....................-0.3V to (VCC + 0.5V) Input Voltage Levels (AMPIN and IBIAS)................-0.3V to +1.5V Input Voltage Levels (ISET) ....................................-0.3V to +1.0V RF Input Signal .......................................................
PAGE 3
IF Digitally Controlled Variable-Gain Amplifier (Typical application circuit without matching, VCC = +4.75V to +5.25V, GND = 0V, max gain (B0 = B1 = B2 = B3 = B4 = 0), R1 = 825Ω, POUT = 5dBm, fIN = 50MHz, 50Ω RF system impedance. Typical values are at VCC = +5V and TA = +25°C, unless otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL Frequency Range fR Gain G Noise Figure NF Minimum Reverse Isolation CONDITIONS MIN TYP 50 No attenuation 15.5 MAX UNITS 400 MHz dB Max gain 4.
PAGE 4
Typical Operating Characteristics (Typical application circuit, VCC = 5.0V, max gain (B0 = B1 = B2 = B3 = B4 = 0), POUT = 5dBm, R1 = 825Ω, TA = +25°C, unless otherwise noted.) VCC = 5.25V 58 56 VCC = 4.
PAGE 5
IF Digitally Controlled Variable-Gain Amplifier 0.8 0.4 0.2 0 -0.2 -0.4 0.6 6.5 0.4 0.2 0 -0.2 -0.4 5.0 4.5 4.0 -0.6 3.0 -0.8 2.5 -1.0 -1.0 200 250 300 350 400 2.0 50 100 FREQUENCY (MHz) 150 200 250 300 350 50 100 200 250 300 350 400 OUTPUT P-1dB vs. FREQUENCY 22 OUTPUT P-1dB (dBm) TA = +85°C TA = +25°C 20 19 MAX2027 toc12 23 MAX2027 toc11 22 21 150 FREQUENCY (MHz) OUTPUT P-1dB vs. FREQUENCY 23 OUTPUT P-1dB (dBm) 400 FREQUENCY (MHz) 21 VCC = +5.25V 20 VCC= +4.
PAGE 6
Typical Operating Characteristics (continued) (Typical application circuit, VCC = 5.0V, max gain (B0 = B1 = B2 = B3 = B4 = 0), POUT = 5dBm, R1 = 825Ω, TA = +25°C, unless otherwise noted.) 2ND HARMONIC vs. FREQUENCY fIN = 400MHz fIN = 50MHz fIN = 200MHz TA = +25°C -45 -50 -55 15 8 12 16 20 24 100 150 200 250 300 350 400 VCC = +5V 50 100 MAX2027 toc18 49 TA = -40°C TA = +25°C PRF1 = PRF2 = 5dBm AT OUTPUT, ∆f = 1MHz 49 O1P2 (dBm) 45 43 200 VCC = +4.75V 47 VCC = +5.
PAGE 7
IF Digitally Controlled Variable-Gain Amplifier PIN NAME FUNCTION Power Supply. Bypass to GND with capacitors as close to the pin as possible as shown in the typical application circuit (Figure 1). 1, 2, 11 VCC 3 RF_IN Signal Input. See the typical application circuit for recommended component values. Requires an external DC-blocking capacitor. 4, 5, 16, 17, 19, 20, EP GND Ground. Use low-inductance layout techniques on PC board. Solder the exposed pad evenly to the board ground plane.
PAGE 8
MAX2027 IF Digitally Controlled Variable-Gain Amplifier VCC 1 C7 C1 C2 2 20 MAX2027 19 L3* 3 C8* VCC 18 EXPOSED PADDLE 4 R6 R5 C9* L4* RF IN R4 R3 R2 ATTNOUT 17 5 16 6 15 C3 L1 B4 B3 CONTROL INPUTS B2 B1 B0 7 8 9 10 ATTENUATION LOGIC CONTROL AMP BIAS 14 13 AMPIN IBIAS ISET C10 R1 12 RF OUT C4 11 L2 VCC *OPTIONAL COMPONENTS: USE TO IMPROVE HIGHER FREQUENCY MATCHING C5 C6 Figure 1.
PAGE 9
IF Digitally Controlled Variable-Gain Amplifier ATTENUATION (dB) B4 B3* (16dB) (8dB) Chip Information TRANSISTOR COUNT: 325 B2 (4dB) B1 (2dB) B0 (1dB) 0 0 0 0 0 0 1 0 0 0 0 1 2 0 0 0 1 0 3 0 0 0 1 1 4 0 0 1 0 0 5 0 0 1 0 1 6 0 0 1 1 0 7 0 0 1 1 1 8 0 1 0 0 0 9 0 1 0 0 1 10 0 1 0 1 0 11 0 1 0 1 1 12 0 1 1 0 0 13 0 1 1 0 1 14 0 1 1 1 0 15 0 1 1 1 1 16 1 X 0 0 0 17 1 X 0 0 1 18 1 X 0 1 0 19
PAGE 10
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.) TSSOP 4.4mm BODY.EPS MAX2027 IF Digitally Controlled Variable-Gain Amplifier PACKAGE OUTLINE, TSSOP, 4.40 MM BODY EXPOSED PAD 21-0108 D 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.