MAXIM MAX9994 Technical data

General Description

The MAX9994 high-linearity downconversion mixer provides 8.3dB gain, +26.2dBm IIP3, and 9.7dB NF for 1400MHz to 2200MHz UMTS/WCDMA, DCS, and PCS base-station receiver applications. With a wide LO range of 1400MHz to 2000MHz, the MAX9994 can be used in either high-side or low-side LO injection architectures, depending on the RF band of interest. Higher LO applications are supported by the MAX9996, which is pin-pin and functionally compatible with the MAX9994.

In addition to offering excellent linearity and noise performance, the MAX9994 also yields a high level of component integration. This device includes a doublebalanced passive mixer core, an IF amplifier, a dualinput LO selectable switch, and an LO buffer. On-chip baluns are also integrated to allow for single-ended RF and LO inputs. The MAX9994 requires a nominal LO drive of 0dBm, and supply current is guaranteed to be below 235mA.

The MAX9994/MAX9996 are pin compatible with the MAX9984/MAX9986 815MHz to 995MHz mixers, making this entire family of downconverters ideal for applications where a common PC board layout is used for both frequency bands. The MAX9994 is also functionally compatible with the MAX9993.

The MAX9994 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

UMTS/LTE Base Stations

TD-SCDMA/TD-LTE Base Stations

DCS1800/PCS1900 EDGE Base Stations

cdmaOne™ and cdma2000

Base Stations

PHS/PAS Base Stations

Predistortion Receivers

Fixed Broadband Wireless Access

Wireless Local Loop

Private Mobile Radios

Military Systems

Microwave Links

Digital and Spread-Spectrum Communication Systems

Features

♦ 1400MHz to 2200MHz RF Frequency Range ♦ 1400MHz to 2000MHz LO Frequency Range

(MAX9994)

♦ 1900MHz to 2400MHz LO Frequency Range

(MAX9996)

♦ 40MHz to 350MHz IF Frequency Range ♦ 8.3dB Conversion Gain ♦ +26.2dBm Input IP3 ♦ +12.6dBm Input 1dB Compression Point ♦ 9.7dB Noise Figure ♦ 67dBc 2RF - 2LO Spurious Rejection at

= -10dBm

♦ Integrated LO Buffer ♦ Integrated RF and LO Baluns for Single-Ended

Inputs

♦ Low -3dBm to +3dBm LO Drive ♦ Built-In SPDT LO Switch with 45dB LO1 to LO2

Isolation and 50ns Switching Time

♦ Pin Compatible with the MAX9984/MAX9986

815MHz to 995MHz Mixers

♦ Functionally Compatible with the MAX9993 ♦ External Current-Setting Resistors Provide Option

for Operating Mixer in Reduced Power/Reduced Performance Mode

MAX9994

SiGe High-Linearity, 1400MHz to 2200MHz

Downconversion Mixer with LO Buffer/Switch

________________________________________________________________

Maxim Integrated Products

Pin Configuration/Functional Diagram and Typical Application Circuit appear at end of data sheet.

19-3435; 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

Ordering Information

EP = Exposed pad.

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

T = Tape and reel.

cdma2000 is a registered trademark of Telecommunications Industry Association. cdmaOne is a trademark of CDMA Development Group.

PART TEMP RANGE PIN-PACKAGE

MAX9994ETP+ -40°C to +85°C

MAX9994ETP+T -40°C to +85°C

20 Thin QFN-EP** 5mm  5mm bulk

20 Thin QFN-EP** 5mm  5mm T/R

MAX9994

SiGe High-Linearity, 1400MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, VCC= +4.75V to +5.25V, no RF signal applied, IF+ and IF- outputs pulled up to VCCthrough inductive

chokes, R

= 806Ω, R2= 549Ω, TC= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +5V, TC= +25°C, unless

otherwise noted.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

VCCto GND...........................................................-0.3V to +5.5V

IF+, IF-, LOBIAS, LOSEL, IFBIAS to GND...-0.3V to (V

+ 0.3V)

TAP ........................................................................-0.3V to +1.4V

LO1, LO2, LEXT to GND........................................-0.3V to +0.3V

RF, LO1, LO2 Input Power .............................................+12dBm

RF (RF is DC shorted to GND through a balun) .................50mA

Continuous Power Dissipation (T

= +70°C)

20-Pin Thin QFN-EP (derate 20mW/°C above +70°C)..............1.8W

(Note 1) ...................................................................+38°C/W

(Note 1) .....................................................................+8°C/W

Operating Temperature Range (Note 2).....T

= -40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering 10s) ..................................+300°C

Soldering Temperature (reflow) .......................................+260°C

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer

board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial

Note 2: T

is the temperature on the exposed pad of the package.

RECOMMENDED AC OPERATING CONDITIONS

Supply Voltage V

Supply Current I

LO_SEL Input Logic-Low V

LO_SEL Input Logic-High V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

4.75 5.00 5.25 V

206 235 mA

0.8 V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RF Frequency Range f

LO Frequency Range f

IF Frequency Range f

LO Drive Level P

(Note 3) 1400 2200 MHz

(Note 3) 1400 2000 MHz

(Note 3) 40 350 MHz

(Note 3) -3 +3 dBm

MAX9994

SiGe High-Linearity, 1400MHz to 2200MHz

Downconversion Mixer with LO Buffer/Switch

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS—fRF= 1700MHz TO 2200MHz, LOW-SIDE LO INJECTION

(

Typical Application Circuit

, VCC= +4.75V to +5.25V, RF and LO ports are driven from 50Ω sources, PLO= -3dBm to +3dBm,

= -5dBm, fRF= 1700MHz to 2200MHz, fLO= 1400MHz to 2000MHz, fIF= 200MHz, fRF> fLO, TC= -40°C to +85°C, unless other-

wise noted. Typical values are at V

= +5V, P

= -5dBm, PLO= 0dBm, fRF= 1900MHz, fLO= 1700MHz, fIF= 200MHz,

= +25°C, unless otherwise noted.) (Notes 4, 5)

Conversion Gain GC P

Gain Variation Over Temperature TC = -40°C to +85°C ±0.75 dB

Input Compres sion Point P

Input Third-Order Intercept Point (Note 6)

Input IP3 Variation Over Temperature

Noise Figure NF Single sideband 9.7 dB

Noise Figure Under-Blocking

LO Drive -3 +3 dBm

Spurious Response at IF

LO1 to LO2 Isolation (Note 4)

Max imum LO Leakage at RF Port

Max imum LO Lea kage at IF Port PLO = +3dBm -30 dBm

Min imum RF-to-IF Isolation 35 dB

LO Switching Time 50% of LOSEL to IF settled to within 2° 50 ns

RF Port Return Loss 21 dB

LO Port Return Loss

IF Port Return Loss

PARAMETER S YMBOL CONDITIONS MIN TYP MAX UNITS

(Note 7) 12.6 dBm

1dB

IIP3

2 x 2 2RF - 2LO

3 x 3 3RF - 3LO

< +2dBm, TA = +25°C (Note 6) 7.2 8.3 9.2 dB

Two tones: f

= 2000MHz, f

RF1

= -5dBm/tone, fLO = 1800MHz,

= 0dBm, TA = +25°C

= -40°C to +85°C ±0.5 dB

= 5dBm, f

= 1810MHz, f

LO2 selected, 1500MHz < f

LO1 selected, 1500MHz < f

= +3dBm -17 dBm

LO1/2 port selected, LO2/1 and IF terminated

LO1/2 port unselected, LO2/1 and IF terminated

LO driven at 0dBm, RF terminated into 50, differential 200

= 2001MHz,

RF2

= 2000MHz,

= 2100MHz (Note 8)

block

PRF = -10dBm 67

PRF = -10dBm 82

< 1700MHz

23.5 26.2 dBm

19 dB

= -5dBm 62

= -5dBm 72

40 52

40 45

20 dB

dBc

MAX9994

SiGe High-Linearity, 1400MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch

4 _______________________________________________________________________________________

Note 3: Operation outside this range is possible, but with degraded performance of some parameters. Note 4: Guaranteed by design and characterization. Note 5: All limits include external component losses. Output measurements taken at IF output of the

Typical Application Circuit

Note 6: Production tested. Note 7: Compression point characterized. It is advisable not to operate continuously the mixer RF input above +12dBm. Note 8: Measured with external LO source noise filtered so the noise floor is -174dBm/Hz. This specification reflects the effects of all

SNR degradations in the mixer, including the LO noise as defined in Application Note 2021:

Specifications and

Measurement of Local Oscillator Noise in Integrated Circuit Base Station Mixers

AC ELECTRICAL CHARACTERISTICS—fRF= 1455MHz, HIGH-SIDE LO INJECTION

(

Typical Application Circuit

, RF and LO ports are driven from 50Ω sources, fRF< fLO, VCC= +5V, PRF= -5dBm, PLO= 0dBm,

= 1455MHz, fLO= 1625MHz, fIF= 170MHz, TC= +25°C, LO2 is selected, unless otherwise noted.) (Note 5)

AC ELECTRICAL CHARACTERISTICS—fRF= 1500MHz, HIGH-SIDE LO INJECTION

(

Typical Application Circuit

, RF and LO ports are driven from 50Ω sources, fRF< fLO, VCC= +5V, PRF= -5dBm, PLO= 0dBm,

= 1500MHz, fLO= 1650MHz, fIF= 150MHz, TC= +25°C, LO1 is selected, unless otherwise noted.) (Note 5)

Conversion Gain GC 8.8 dB

Input Third-Order Intercept Point IIP3

Input Compres sion Point (Note 7)

2LO - 2RF Spurious Response 2 x 2

LO-to-IF Leakage LOSEL = LO2 -30.2 dBm

PARAMETER S YMBOL CONDITIONS MIN TYP MAX UNITS

Conversion Gain GC 8.9 dB

Input Third-Order Intercept Point IIP3

Input Compres sion Point (Note 7)

2LO - 2RF Spurious Response 2 x 2

LO-to-IF Leakage -33.2 dBm

PARAMETER S YMBOL CONDITIONS MIN TYP MAX UNITS

Two tones: f

= 1455MHz, f

RF1

= -5dBm/tone

12.7 dBm

1dB

PRF = -10dBm 71.4

= -5dBm 66.4

Two tones: f

= 1500MHz, f

RF1

= -5dBm/tone

12.5 dBm

1dB

PRF = -10dBm 70.4

= -5dBm 65.4

= 1456MHz,

RF2

= 1501MHz,

RF2

25.6 dBm

25.5 dBm

dBc

MAX9994

SiGe High-Linearity, 1400MHz to 2200MHz

Downconversion Mixer with LO Buffer/Switch

_______________________________________________________________________________________

Typical Operating Characteristics

(MAX9994

Typical Application Circuit

, VCC= +5.0V, PLO= 0dBm, PRF= -5dBm, fRF= 1700MHz to 2200MHz, LO is Low-Side

Injected for a 200MHz IF, unless otherwise noted.)

CONVERSION GAIN vs. RF FREQUENCY

CONVERSION GAIN (dB)

TC = -25°C

TC = +85°C

1500 18001650 1950 2100 2250 2400

TC = +25°C

RF FREQUENCY (MHz)

MAX9994 toc01

CONVERSION GAIN (dB)

INPUT IP3 vs. RF FREQUENCY

INPUT IP3 (dBm)

1500 1800 19501650 2100 2250 2400

TC = +25°C

TC = -25°C

TC = +85°C

RF FREQUENCY (MHz)

MAX9994 toc04

INPUT IP3 (dBm)

CONVERSION GAIN vs. RF FREQUENCY

1500 18001650 1950 2100 2250 2400

1500 1800 19501650 2100 2250 2400

PLO = -3dBm, 0dBm, +3dBm

RF FREQUENCY (MHz)

INPUT IP3 vs. RF FREQUENCY

PLO = +3dBm

PLO = -3dBm, 0dBm

RF FREQUENCY (MHz)

MAX9994 toc02

CONVERSION GAIN (dB)

MAX9994 toc05

INPUT IP3 (dBm)

CONVERSION GAIN vs. RF FREQUENCY

MAX9994 toc03

VCC = 4.75V, 5.0V, 5.25V

1500 18001650 1950 2100 2250 2400

RF FREQUENCY (MHz)

INPUT IP3 vs. RF FREQUENCY

MAX9994 toc06

VCC = 4.75V

VCC = 5.0V, 5.25V

1500 1800 19501650 2100 2250 2400

RF FREQUENCY (MHz)

NOISE FIGURE vs. RF FREQUENCY

NOISE FIGURE (dB)

1500 1800 19501650 2100 2250 2400

RF FREQUENCY (MHz)

TC = +85°C

TC = +25°C

TC = -25°C

MAX9994 toc07

NOISE FIGURE vs. RF FREQUENCY

NOISE FIGURE (dB)

1500 1800 19501650 2100 2250 2400

PLO = -3dBm

PLO = 0dBm

PLO = +3dBm

RF FREQUENCY (MHz)

MAX9994 toc08

NOISE FIGURE (dB)

NOISE FIGURE vs. RF FREQUENCY

VCC = 5.0V

1500 1800 19501650 2100 2250 2400

VCC = 5.25V

VCC = 4.75V

RF FREQUENCY (MHz)

MAX9994 toc09

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