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General Description

The MAX2031 high-linearity passive upconverter or

downconverter mixer is designed to provide +36dBm

IIP3, 7dB NF, and 7dB conversion loss for a 650MHz to

1000MHz RF frequency range to support GSM/cellular

base-station transmitter or receiver applications. With a

650MHz to 1250MHz LO frequency range, this particu-

lar mixer is ideal for high-side LO injection architec-

tures. For a pin-to-pin-compatible mixer meant for

low-side LO injection, refer to the MAX2029.

In addition to offering excellent linearity and noise per-

formance, the MAX2031 also yields a high level of com-

ponent integration. This device includes a double-

balanced passive mixer core, a dual-input LO selec-

table switch, and an LO buffer. On-chip baluns are also

integrated to allow for a single-ended RF input for

downconversion (or RF output for upconversion), and

single-ended LO inputs. The MAX2031 requires a nomi-

nal LO drive of 0dBm, and supply current is guaranteed

to be below 100mA.

The MAX2031 is pin compatible with the MAX2039/

MAX2041 1700MHz to 2200MHz mixers, making this

family of passive upconverters and downconverters

ideal for applications where a common PC board layout

is used for both frequency bands.

The MAX2031 is available in a compact 20-pin thin

QFN package (5mm x 5mm) with an exposed pad.

Electrical performance is guaranteed over the extended

-40°C to +85°C temperature range.

Applications

Features

♦ 650MHz to 1000MHz RF Frequency Range

♦ 650MHz to 1250MHz LO Frequency Range

♦ 570MHz to 900MHz LO Frequency Range

(Refer to the MAX2029 Data Sheet)

♦ DC to 250MHz IF Frequency Range

♦ 7dB Conversion Loss

♦ +36dBm Input IP3

♦ +27dBm Input 1dB Compression Point

♦ 7dB Noise Figure

♦ Integrated LO Buffer

♦ Integrated RF and LO Baluns

♦ Low -3dBm to +3dBm LO Drive

♦ Built-In SPDT LO Switch with 49dB LO1 to LO2

Isolation and 50ns Switching Time

♦ Pin Compatible with the MAX2039/MAX2041

1700MHz to 2200MHz Mixers

♦ External Current-Setting Resistor Provides Option

for Operating Mixer in Reduced-Power/Reduced-

Performance Mode

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

________________________________________________________________

Maxim Integrated Products

19-0248; Rev 1; 6/09

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

cdma2000 is a registered trademark of Telecommunications

Industry Association.

iDEN is a registered trademark of Motorola, Inc.

WiMAX is a trademark of WiMAX Forum.

WCDMA/LTE and

cdma2000

Base

Stations

GSM 850/GSM 900 2G

and 2.5G EDGE Base

Stations

Integrated Digital

Enhanced Network

(iDEN

) Base Stations

WiMAX™ Base Stations

and Customer Premise

Equipment

Predistortion Receivers

Microwave and Fixed

Broadband Wireless

Access

Wireless Local Loop

Digital and Spread-

Spectrum

Communication Systems

Ordering Information

PART TEMP RANGE PIN-PACKAGE

M AX 2031E TP + - 40°C to + 85° C 20 Thi n QFN- E P *

M AX 2031E TP + T- 40°C to + 85° C 20 Thi n QFN- E P *

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

T= Tape and reel.

EP = Exposed pad.

MAX2031

TOP VIEW

LOBIAS

LOSEL

GND

IF+

GND

TAP

910

20 19 17 16

GND

LO1

IF-

LO2

E.P.

Pin Configuration/

Functional Diagram

Summary of content (20 pages)

PAGE 1
KIT ATION EVALU E L B AVAILA 19-0248; Rev 1; 6/09 High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch Features The MAX2031 high-linearity passive upconverter or downconverter mixer is designed to provide +36dBm IIP3, 7dB NF, and 7dB conversion loss for a 650MHz to 1000MHz RF frequency range to support GSM/cellular base-station transmitter or receiver applications.
PAGE 2
MAX2031 High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +5.5V RF (RF is DC shorted to GND through a balun)..................50mA LO1, LO2 to GND ..................................................-0.3V to +0.3V IF+, IF- to GND ...........................................-0.3V to (VCC + 0.3V) TAP to GND ...........................................................-0.
PAGE 3
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch (Typical Application Circuit, optimized for the 800MHz/900MHz cellular band (see Table 1), C1 = 82pF, C5 = 2pF, L1 and C4 not used, VCC = 4.75V to 5.25V, RF and LO ports driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = 0dBm, fRF = 815MHz to 1000MHz, fLO = 960MHz to 1180MHz, fIF = 160MHz, fLO > fRF, TC = -40°C to +85°C, unless otherwise noted.
PAGE 4
MAX2031 High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch AC ELECTRICAL CHARACTERISTICS (700MHz BAND DOWNCONVERTER OPERATION) (Typical Application Circuit, optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC = 4.75V to 5.25V, RF and LO ports driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = 0dBm, fRF = 650MHz to 850MHz, fLO = 790MHz to 990MHz, fIF = 140MHz, fLO > fRF, TC = +25°C, unless otherwise noted.
PAGE 5
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch Downconverter Curves TC = +25°C 7 7 5 950 1000 800 RF FREQUENCY (MHz) TC = +85°C, +25°C 36 38 INPUT IP3 (dBm) 800 1000 34 TC = -40°C 32 TC = -25°C PRF = 0dBm/TONE PLO = +3dBm PLO = 0dBm 40 PLO = -3dBm 32 VCC = 4.75V 28 28 26 26 800 NOISE FIGURE vs. RF FREQUENCY TC = +25°C NOISE FIGURE vs. RF FREQUENCY 9 NOISE FIGURE (dB) 7 1000 NOISE FIGURE vs.
PAGE 6
Typical Operating Characteristics (continued) (Typical Application Circuit, optimized for the 800MHz/900MHz cellular band (see Table 1), C1 = 82pF, C5 = 2pF, L1 and C4 not used, VCC = 5.0V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 160MHz, TC = +25°C, unless otherwise noted.) Downconverter Curves 2LO - 2RF RESPONSE vs. RF FREQUENCY TC = +85°C 75 65 TC = -25°C TC = -40°C 850 900 950 75 PLO = +3dBm 65 55 850 900 65 VCC = 5.25V 55 950 1000 800 850 900 950 3LO - 3RF RESPONSE vs.
PAGE 7
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch Downconverter Curves TC = -40°C, -25°C 50 TC = +85°C 45 TC = +25°C 50 PLO = -3dBm, 0dBm, +3dBm 45 950 1050 1150 950 1050 1150 950 1050 1150 LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs. LO FREQUENCY -20 VCC = 5.25V TC = +85°C -50 -30 LO LEAKAGE (dBm) LO LEAKAGE (dBm) TC = +25°C -40 PLO = -3dBm, 0dBm, +3dBm -50 1010 1060 1110 VCC = 4.
PAGE 8
Typical Operating Characteristics (continued) (Typical Application Circuit, optimized for the 800MHz/900MHz cellular band (see Table 1), C1 = 82pF, C5 = 2pF, L1 and C4 not used, VCC = 5.0V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 160MHz, TC = +25°C, unless otherwise noted.) Downconverter Curves RF-TO-IF ISOLATION vs. RF FREQUENCY 50 45 TC = -40°C, -25°C 35 50 45 40 PLO = -3dBm PLO = 0dBm 35 30 850 900 950 1000 45 VCC = 4.75V, 5.0V, 5.
PAGE 9
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch Downconverter Curves 6 TC = +25°C TC = -40°C 5 8 7 PLO = -3dBm, 0dBm, +3dBm 6 800 850 650 RF FREQUENCY (MHz) INPUT IP3 vs. RF FREQUENCY MAX2031 toc39 VCC = 4.75V, 5.0V, 5.25V 6 750 800 650 850 PRF = 0dBm/TONE 38 INPUT IP3 (dBm) TC = +25°C TC = +85°C 34 36 34 750 800 850 INPUT IP3 vs. RF FREQUENCY 40 MAX2031 toc40 38 700 RF FREQUENCY (MHz) INPUT IP3 vs.
PAGE 10
Typical Operating Characteristics (continued) (Typical Application Circuit, optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC = 5V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 140MHz, TC = +25°C, unless otherwise noted.) Downconverter Curves 80 TC = +85°C 70 PRF = 0dBm TC = -40°C 80 PLO = -3dBm, 0dBm, +3dBm 70 90 PRF = 0dBm VCC = 5.25V MAX2031 toc48 90 3LO-3RF RESPONSE vs.
PAGE 11
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch Downconverter Curves TC = +85°C TC = +25°C -30 PLO = -3dBm -25 PLO = 0dBm 840 890 940 990 790 840 940 790 990 840 890 940 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY 2LO LEAKAGE AT RF PORT vs.
PAGE 12
Typical Operating Characteristics (continued) (Typical Application Circuit, optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC = 5V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 140MHz, TC = +25°C, unless otherwise noted.) Downconverter Curves RF PORT RETURN LOSS vs. RF FREQUENCY 10 15 10 15 VCC = 4.75V, 5.0V, 5.25V 20 PLO = -3dBm, 0dBm, +3dBm 700 800 50 1000 900 100 150 200 30 250 300 350 600 750 100 VCC = 5.
PAGE 13
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch Upconverter Curves TC = -40°C 5 5 800 850 900 950 1000 1050 7 VCC = 4.75V, 5.0V, 5.25V 6 5 4 3 3 750 750 800 850 900 950 1000 750 1050 800 850 900 950 1000 1050 INPUT IP3 vs. RF FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY) INPUT IP3 vs. RF FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY) INPUT IP3 vs.
PAGE 14
Typical Operating Characteristics (continued) (Typical Application Circuit, L1 = 4.7nH, C4 = 6pF, C5 not used, VCC = 5.0V, PLO = 0dBm, PIF = 0dBm, fRF = fLO + fIF, fIF = 160MHz, TC = +25°C, unless otherwise noted.) Upconverter Curves 80 80 80 75 65 TC = +25°C 60 55 60 PLO = -3dBm PLO = 0dBm 960 1010 1060 1110 1160 1210 VCC = 5.25V 70 VCC = 5.0V 65 60 VCC = 4.75V 55 50 910 50 910 960 1010 1060 1110 1160 910 1210 960 1010 1060 1110 1160 1210 LO + 3IF REJECTION vs.
PAGE 15
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch Upconverter Curves -20 TC = -40°C, -25°C -25 TC = +85°C -30 TC = +25°C -20 -25 PLO = -3dBm, 0dBm, +3dBm -30 LO LEAKAGE AT RF PORT vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY) -15 -20 910 960 1010 1060 1110 1160 VCC = 4.75V -30 VCC = 5.0V -35 910 1210 VCC = 5.
PAGE 16
MAX2031 High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch Pin Description PIN NAME FUNCTION 1, 6, 8, 14 VCC 2 RF 3 TAP Center Tap of the Internal RF Balun. Connect to ground. 4, 5, 10, 12, 13, 16, 17, 20 GND Ground Power-Supply Connection. Bypass each VCC pin to GND with capacitors as shown in the Typical Application Circuit. Single-Ended 50Ω RF Input/Output. This port is internally matched and DC shorted to GND through a balun.
PAGE 17
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch High-Linearity Mixer The core of the MAX2031 is a double-balanced, highperformance passive mixer. Exceptional linearity is provided by the large LO swing from the on-chip LO buffer. Differential IF The MAX2031 mixer has a DC to 250MHz IF frequency range. Note that these differential ports are ideal for providing enhanced IIP2 performance.
PAGE 18
MAX2031 High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch expense of performance, contact the factory for details. If the ±1% bias resistor values are not readily available, substitute standard ±5% values. Layout Considerations A properly designed PC board is an essential part of any RF/microwave circuit. Keep RF signal lines as short as possible to reduce losses, radiation, and inductance.
PAGE 19
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch T1 1 4 3 5 IF C3 RF RF C4 L1 19 17 GND IF18 16 C12 VCC C1 20 + C2 IF+ GND VCC GND C5 TAP GND GND 15 1 MAX2031 2 14 3 13 4 12 E.P. 11 5 LO2 LO2 VCC VCC C11 GND GND LO1 LO1 C10 GND 10 LOSEL 9 VCC 8 LOBIAS 7 VCC 6 R1 VCC LOSEL C6 C7 C8 VCC NOTE: L1 AND C4 USED ONLY FOR UPCONVERTER OPERATION. C5 USED ONLY FOR DOWNCONVERTER OPERATION.
PAGE 20
MAX2031 High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch Revision History REVISION NUMBER REVISION DATE DESCRIPTION 0 7/05 Initial release 1 6/09 Added new Electrical Characteristics tables and Typical Operating Characteristics PAGES CHANGED — 1–16 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.