Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsMAX19995AETX+

General Description

The MAX19995A dual-channel downconverter is

designed to provide 8.7dB of conversion gain,

+24.8dBm input IP3, +13.5dBm 1dB input compression

point, and a noise figure of 9.2dB for 1700MHz to

2200MHz diversity receiver applications. With an opti-

mized LO frequency range of 1750MHz to 2700MHz, this

mixer is ideal for high-side LO injection architectures.

Low-side LO injection is supported by the MAX19995,

which is pin-pin and functionally compatible with the

MAX19995A.

In addition to offering excellent linearity and noise per-

formance, the MAX19995A also yields a high level of

component integration. This device includes two double-

balanced passive mixer cores, two LO buffers, a dual-

input LO selectable switch, and a pair of differential IF

output amplifiers. Integrated on-chip baluns allow for sin-

gle-ended RF and LO inputs. The MAX19995A requires a

nominal LO drive of 0dBm and a typical supply current of

350mA at V

= 5.0V, or 242mA at V

= 3.3V.

The MAX19995/MAX19995A are pin compatible with the

MAX19985/MAX19985A series of 700MHz to 1000MHz

mixers and pin similar to the MAX19997A/MAX19999

series of 1800MHz to 4000MHz mixers, making this

entire family of downconverters ideal for applications

where a common PCB layout is used across multiple

frequency bands.

The MAX19995A is available in a 6mm x 6mm, 36-pin

thin QFN package with an exposed pad. Electrical per-

formance is guaranteed over the extended temperature

range (T

= -40°C to +85°C).

Applications

UMTS/WCDMA Base Stations

LTE/WiMAX

™

Base Stations

TD-SCDMA Base Stations

DCS1800/PCS1900 and GSM/EDGE Base

Stations

cdma2000

Base Stations

Fixed Broadband Wireless Access

Wireless Local Loop

Private Mobile Radios

Military Systems

Features

♦ 1700MHz to 2200MHz RF Frequency Range

♦ 1750MHz to 2700MHz LO Frequency Range

♦ 50MHz to 500MHz IF Frequency Range

♦ 8.7dB Typical Conversion Gain

♦ 9.2dB Typical Noise Figure

♦ +24.8dBm Typical Input IP3

♦ +13.5dBm Typical Input 1dB Compression Point

♦ 64dBc Typical 2LO-2RF Spurious Rejection at

= -10dBm

♦ Dual Channels Ideal for Diversity Receiver

Applications

♦ 48dB Typical Channel-to-Channel Isolation

♦ Low -3dBm to +3dBm LO Drive

♦ Integrated LO Buffer

♦ Internal RF and LO Baluns for Single-Ended

Inputs

♦ Built-In SPDT LO Switch with 48dB LO-to-LO

Isolation and 50ns Switching Time

♦ Pin Compatible with the MAX19985/MAX19985A/

MAX19995 Series of 700MHz to 2200MHz Mixers

♦ Pin Similar to the MAX19997A/MAX19999 Series

of 1800MHz to 4000MHz Mixers

♦ Single 5.0V or 3.3V Supply

♦ External Current-Setting Resistors Provide Option

for Operating Device in Reduced-Power/Reduced-

Performance Mode

MAX19995A

Dual, SiGe, High-Linearity, 1700MHz to 2200MHz

Downconversion Mixer with LO Buffer/Switch

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-4419; Rev 0; 1/09

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.

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

EP = Exposed pad.

T = Tape and reel.

WiMAX is a trademark of WiMAX Forum.

cdma2000 is a registered trademark of Telecommunications

Industry Association.

PART TEMP RANGE PIN-PACKAGE

MAX19995AETX+

-40°C to +85°C 36 Thin QFN-EP*

MAX19995AETX+T

-40°C to +85°C 36 Thin QFN-EP*

Pin Configuration/Functional Diagram appears at end of

data sheet.

Summary of content (23 pages)

PAGE 1
9-4419; Rev 0; 1/09 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch The MAX19995A dual-channel downconverter is designed to provide 8.7dB of conversion gain, +24.8dBm input IP3, +13.5dBm 1dB input compression point, and a noise figure of 9.2dB for 1700MHz to 2200MHz diversity receiver applications. With an optimized LO frequency range of 1750MHz to 2700MHz, this mixer is ideal for high-side LO injection architectures.
PAGE 2
MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch ABSOLUTE MAXIMUM RATINGS θJA (Notes 2, 3)..............................................................+38°C/W θJC (Notes 1, 3)...............................................................7.4°C/W Operating Case Temperature Range (Note 4) ....-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................
PAGE 3
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch MAX UNITS RF Frequency PARAMETER fRF (Note 5) 1700 2200 MHz LO Frequency fLO (Note 5) 1750 2700 MHz Using Mini-Circuits TC4-1W-17 4:1 transformer as defined in the Typical Application Circuit, IF matching components affect the IF frequency range (Note 5) 100 500 IF Frequency SYMBOL fIF LO Drive Level CONDITIONS MIN TYP MHz Using alternative Mini-Circuits TC4-1W-7A 4:1 transformer as defined in
PAGE 4
MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 4.75V to 5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 1700MHz to 2000MHz, fLO = 2050MHz to 2350MHz, fIF = 350MHz, fRF < fLO, TC = -40°C to +85°C. Typical values are at VCC = 5.
PAGE 5
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 4.75V to 5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 1700MHz to 2000MHz, fLO = 2050MHz to 2350MHz, fIF = 350MHz, fRF < fLO, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C.
PAGE 6
MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 1kΩ. Typical values are at VCC = 3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.
PAGE 7
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch CONVERSION GAIN vs. RF FREQUENCY TC = +85°C 8 PLO = -3dBm, 0dBm, +3dBm 7 TC = +25°C 6 6 1900 2000 2100 1800 INPUT IP3 vs. RF FREQUENCY 2100 2200 PLO = +3dBm TC = +25°C TC = -30°C 23 24 PLO = -3dBm PLO = 0dBm 22 2000 2100 2200 25 1800 1900 2000 2100 2200 NOISE FIGURE (dB) 9 8 2000 RF FREQUENCY (MHz) 2100 2200 2200 10 9 8 VCC = 4.75V, 5.0V, 5.
PAGE 8
Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) 60 TC = -30°C 70 60 PLO = -3dBm 40 2000 2100 2200 1700 1800 2100 1700 2200 75 65 PRF = -5dBm 1900 2000 2100 65 PLO = -3dBm, 0dBm, +3dBm 2200 1800 1900 2000 2100 TC = -30°C 11 2100 2200 1900 2000 2100 16 PLO = -3dBm, 0dBm, +3dBm VCC = 5.
PAGE 9
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 45 50 45 PLO = -3dBm, 0dBm, +3dBm TC = -30°C, +25°C, +85°C 40 40 1800 1900 2000 2100 VCC = 4.75V, 5.0V, 5.25V 40 1700 1800 1900 2000 2100 2200 1700 1800 1900 2000 2100 LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs. LO FREQUENCY -35 TC = +25°C -30 -35 -25 VCC = 5.25V -35 VCC = 4.75V -40 2250 2350 2450 VCC = 5.
PAGE 10
Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) TC = -30°C TC = +25°C -40 PLO = -3dBm -30 PLO = 0dBm -40 PLO = +3dBm -20 MAX19995A toc30 MAX19995A toc29 -20 LO LEAKAGE AT RF PORT (dBm) -30 MAX19995A toc28 LO LEAKAGE AT RF PORT (dBm) -20 LO LEAKAGE AT RF PORT vs. LO FREQUENCY LO LEAKAGE AT RF PORT vs.
PAGE 11
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch IF PORT RETURN LOSS vs. IF FREQUENCY 10 PLO = -3dBm, 0dBm, +3dBm 15 20 L = L1, L2, L4, L5 fLO = 2300MHz VCC = 4.75V, 5.0V, 5.25V L = 120nH 5 L = 330nH 10 15 25 0 MAX19995A toc39 0 LO SELECTED RETURN LOSS (dB) RF PORT RETURN LOSS (dB) 5 LO SELECTED RETURN LOSS vs. LO FREQUENCY MAX19995A toc38 fIF = 350MHz IF PORT RETURN LOSS (dB) 0 MAX19995A toc37 RF PORT RETURN LOSS vs.
PAGE 12
Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) 50 45 0Ω 3.6nH 10nH -30 -40 6.8nH -50 1800 1900 6.8nH 2000 RF FREQUENCY (MHz) 2100 2200 10nH 40 30 3.6nH 20 0Ω 10 -60 1700 50 3.6nH 40 12 0Ω MAX19995A toc48 6.
PAGE 13
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 8 TC = +25°C 6 1900 PLO = -3dBm, 0dBm, +3dBm 2000 2100 1800 1900 RF FREQUENCY (MHz) 2100 6 1700 2200 MAX19995A toc52 21 20 23 VCC = 3.3V 21 20 2000 2100 2200 1800 1900 2000 2100 VCC = 3.3V TC = +25°C TC = -30°C 10 9 8 PLO = -3dBm, 0dBm, +3dBm 2000 RF FREQUENCY (MHz) 2100 2200 1900 2000 2100 MAX19995A toc51 2200 11 10 9 VCC = 3.0V, 3.3V, 3.6V 8 7 6 6 1900 1800 NOISE FIGURE vs.
PAGE 14
Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 1kΩ, VCC = 3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.
PAGE 15
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch CHANNEL ISOLATION vs. RF FREQUENCY 1800 1900 2000 2100 1900 2000 2100 MAX19995A toc69 MAX19995A toc68 CHANNEL ISOLATION (dB) 40 1700 2200 1800 1900 2000 2100 LO LEAKAGE AT IF PORT vs. LO FREQUENCY TC = -30°C -45 TC = +25°C 2150 2250 2350 2450 -35 -40 PLO = -3dBm, 0dBm, +3dBm -45 -50 2050 2550 -30 VCC = 3.6V -35 -40 VCC = 3.0V -45 VCC = 3.
PAGE 16
Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 1kΩ, VCC = 3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) LO LEAKAGE AT RF PORT vs. LO FREQUENCY -60 -60 1950 2150 2350 2550 2350 2550 2750 1750 MAX19995A toc78 2350 2550 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY TC = +85°C TC = +25°C -40 VCC = 3.
PAGE 17
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch IF PORT RETURN LOSS vs. IF FREQUENCY 15 PLO = -3dBm, 0dBm, +3dBm 20 L = 120nH 10 15 L = 330nH 25 0 VCC = 3.3V 5 MAX19995A toc87 5 fLO = 2300MHz VCC = 3.3V LO SELECTED RETURN LOSS (dB) 10 L = L1, L2, L4, L5 MAX19995A toc86 5 LO SELECTED RETURN LOSS vs. LO FREQUENCY 0 IF PORT RETURN LOSS (dB) fIF = 350MHz VCC = 3.
PAGE 18
MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch Pin Description PIN NAME 1 RFMAIN FUNCTION Main Channel RF input. Internally matched to 50Ω. Requires an input DC-blocking capacitor. Main Channel Balun Center Tap. Bypass to GND with 39pF and 0.033µF capacitors as close as possible to the pin with the smaller value capacitor closer to the part. 2 TAPMAIN 3, 5, 7, 12, 20, 22, 24, 25, 26, 34 GND Ground 4, 6, 10, 16, 21, 30, 36 VCC Power Supply.
PAGE 19
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch The MAX19995A is a dual-channel downconverter designed to provide up to 8.7dB of conversion gain, +24.8dBm input IP3, +13.5dBm 1dB input compression point, and a noise figure as low as 9.2dB. In addition to its high-linearity performance, the MAX19995A achieves a high level of component integration. The device integrates two double-balanced mixers for two-channel downconversion.
PAGE 20
MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch Applications Information Input and Output Matching The RF and LO inputs are internally matched to 50Ω. No matching components are required. The RF port input return loss is typically better than 16.5dB over the RF frequency range of 1700MHz to 2200MHz and return loss at the LO ports is typically better than 15dB over the entire LO range. RF and LO inputs require only DC-blocking capacitors for interfacing.
PAGE 21
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch DESIGNATION QTY DESCRIPTION COMPONENT SUPPLIER C1, C2, C7, C8, C14, C16 6 39pF microwave capacitors (0402) Murata Electronics North America, Inc. C3, C6 2 0.033µF microwave capacitors (0603) Murata Electronics North America, Inc. C4, C5 2 Not used — C9, C13, C15, C17, C18 5 0.01µF microwave capacitors (0402) Murata Electronics North America, Inc.
PAGE 22
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch MAX19995A Typical Application Circuit C19 T1 L1 VCC IF MAIN OUTPUT C21 R3 L2 4:1 R1 C20 VCC RFMAIN RF MAIN INPUT TAPMAIN C3 C2 GND VCC VCC C4 GND VCC VCC C5 GND C6 C7 TAPDIV RFDIV RF DIV INPUT C17 28 N.C.
PAGE 23
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 28 N.C. 29 LO_ADJ_M 30 VCC 31 IND_EXTM 32 IFM- 33 IFM+ 34 GND 35 IFM_SET 36 VCC TOP VIEW + RFMAIN 1 MAX19995A 27 LO2 26 GND TAPMAIN 2 GND 3 25 GND VCC 4 24 GND GND 5 23 LOSEL VCC 6 22 GND GND 7 21 VCC 20 GND 19 LO1 16 17 18 VCC LO_ADJ_D N.C.