Maxim MAX2690EUB Datasheet

MAX2690

Low-Noise, 2.5GHz

Downconverter Mixer

________________________________________________________________

Maxim Integrated Products

1

19-1282; Rev 0; 10/97

EVALUATION KIT

AVAILABLE

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For small orders, phone [phone] ext. 3468.

_______________General Description

The MAX2690 is a miniature, low-noise, low-power
downconverter mixer designed for use in portable con­sumer equipment. Signals at the RF input port are
mixed with signals at the local-oscillator (LO) port using
a double-balanced mixer. The RF port frequency range
is 400MHz to 2500MHz. The LO port frequency range is
700MHz to 2500MHz. The IF frequency range is 10MHz
to 500MHz, provided the LO and RF frequencies are
chosen appropriately.

The IF port is differential, which provides good linearity
and low LO emissions, as well as providing compatibili­ty with applications using differential IF filters, such as
CDMA cellular phones. The mixer noise figure is 10dB
at 900MHz.

The MAX2690 draws 16mA at VCC= 3V and operates
from a +2.7V to +5.5V supply. A logic-controlled shut­down mode reduces the supply current to less than 1µA,
making it ideal for battery-operated equipment. This
device is offered in a miniature 10-pin µMAX package.

________________________Applications

2.45GHz Industrial-Scientific-Medical (ISM)
Band Radios

Wireless Local Area Networks (WLANs)
Personal Communications Systems (PCS)
Code-Division Multiple Access (CDMA)

Communications Systems
Cellular and Cordless Phones
Hand-Held Radios

____________________________Features

♦ 7.6dBm Input Third-Order Intercept Point
♦ 10dB Downconverter Mixer Noise Figure
♦ 7.9dB Gain
♦ 400MHz to 2500MHz Wideband Operation
♦ Low Cost
♦ +2.7V to +5.5V Single-Supply Operation
♦ <1µA Shutdown Mode
♦ Ultra-Small 10-Pin µMAX Package

PART

MAX2690EUB -40°C to +85°C

TEMP. RANGE PIN-PACKAGE

10 µMAX

______________Ordering Information

__________________Pin Configuration

1
2
3
4
5

10

9
8
7
6

SHDN
IFOUT+
IFOUT­GNDLORFBYP

RFIN

GND

LGND

MAX2690

µMAX

TOP VIEW

LOV

CC

________________Functional Diagram

1
2
3
4
5

10

9
8
7
6

SHDN
IFOUT+
IFOUT­GNDLORFBYP

RFIN

GND

LGND

MAX2690

µMAX

TOP VIEW

LOV

CC

BIAS

Typical Operating Circuit appears at end of data sheet.

MAX2690

Low-Noise, 2.5GHz
Downconverter Mixer

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +2.7V to +5.5V, no RF signals applied, LO = open, IFOUT+ = IFOUT- = VCC, SHDN = high, LGND = GND = GNDLO = 0V,

T

A

= T

MIN

to T

MAX

. Typical values are at VCC= +3.0V and TA= +25°C, unless otherwise noted. Minimum and maximum values are

guaranteed by design and characterization over temperature.)

AC ELECTRICAL CHARACTERISTICS

(MAX2690 EV kit; VCC= +3.0V; PLO= -3dBm; PRF= -25dBm; SHDN = high; RFIN matched for 900MHz, 1.95GHz, and 2.45GHz as
noted below. Inductor connected from LGND to GND = 39nH for 900MHz operation, 27nH for 1.95GHz operation, and 6.8nH for

2.45GHz operation. T

A

= +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 +6.0V

RFIN Input Power..............................................................10dBm

LO Input Power.................................................................10dBm

SHDN Input Voltage...................................-0.3V to (V

CC

+ 0.3V)

Continuous Power Dissipation

10-Pin µMAX (derate 4.1mW/°C above +70°C)............330mW

Operating Temperature Range

MAX2690EUB...................................................-40°C to +85°C

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

Storage Temperature Range.............................-65°C to +165°C

Lead Temperature (soldering, 10sec).............................+300°C

SHDN = 0V
SHDN = low

0V < SHDN < V

CC

CONDITIONS

V0.5Shutdown Input Voltage Low

V2

mA9.5 16 20.1Operating Supply Current

Shutdown Input Voltage High

0.4
µA

2

Shutdown Supply Current

µA-5 4 25Shutdown Input Bias Current

UNITSMIN TYP MAXPARAMETER

fRF= 2.45GHz, fLO= 2.1GHz

fRF= 1.95GHz, fLO= 1.75GHz

fRF= 900MHz, fLO= 1.1GHz

fRF= 1.95GHz, TA= T

MIN

to T

MAX

(Note 2)

CONDITIONS

dB

4

6.4

7.9

Conversion Gain
(Note 1)

dB±0.6 ±1.2

Gain Variation over
Temperature

UNITSMIN TYP MAXPARAMETER

Two tones at

-25dBm per tone,
f

RF2

= 1MHz above f

RF

fRF= 900MHz, fLO= 1.1GHz

dBm

4.3

5.3

7.6

Input Third-Order Intercept

10

fRF= 2.45GHz, fLO= 2.1GHz

fRF= 1.95GHz, fLO= 1.75GHz

dB

12

Noise-Figure
Single Sideband

11.5

fRF= 900MHz, fLO= 1.1GHz
fRF= 1.95GHz, fLO= 1.75GHz
fRF= 2.45GHz, fLO= 2.1GHz

MAX2690

Low-Noise, 2.5GHz

Downconverter Mixer

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX2690 EV kit; VCC= +3.0V; PLO= -3dBm; PRF= -25dBm; SHDN = high; RFIN matched for 900MHz, 1.95GHz, and 2.45GHz as
noted below. Inductor connected from LGND to GND = 39nH for 900MHz operation, 27nH for 1.95GHz operation, and 6.8nH for

2.45GHz operation. T

A

= +25°C, unless otherwise noted.)

Note 1: Consult the

Applications Information

section for information on designing a matching network.

Note 2: Guaranteed by design and characterization.
Note 3: This spurious response is caused by a higher-order mixing product (2x2). Specified RF frequency is applied and IF output

power is observed at the desired IF frequency (200MHz for f

RF

= 900MHz, or 1.95GHz, and 350MHz for fRF= 2.45GHz).

Note 4: From the time SHDN goes high to the time I

CC

reaches 90% of its final value (on), or from the time SHDN goes low to the

time I

CC

drops below 10µA (off).

fRF= 2.45GHz, fLO= 2.1GHz

fRF= 1.95GHz, fLO= 1.75GHz

fRF= 900MHz, fLO= 1.1GHz

-74

RF input = -15dBm

(Note 4)

dBm

CONDITIONS

-56

IF/2 Spurious Response
(Note 3)

-62

µs1Turn-On Time

dBm

-28

-32

-32

LO Emission at IF Port

UNITSMIN TYP MAXPARAMETER

fRF= 2.45GHz, fLO= 2.1GHz

fRF= 1.95GHz, fLO= 1.75GHz

fRF= 900MHz, fLO= 1.1GHz

dBm

-25

-27

-30

LO Emission at RF Port

(Note 4) µs1.6Turn-Off Time

fRF= 1.0GHz, fLO= 1.1GHz
fRF= 1.85GHz, fLO= 1.75GHz
fRF= 2.275GHz, fLO= 2.1GHz