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MAX2701

1.8GHz to 2.5GHz Direct Downconversion Receivers

Maxim Integrated 

1.8GHz to 2.5GHz Direct Downconversion

Receivers

AC ELECTRICAL CHARACTERISTICS

(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA = +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to

CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN

(single-ended input to balun) driven from 50Ω source, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩ load; IIN1+,

QIN1+, IIN2+, QIN2+ driven from 1.1kΩ AC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to

100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)

PARAMETERS

CONDITIONS

MIN TYP MAX UNITS

LNA STAGE

Operating Frequency Range

(Note 1)

MAX2700

MAX2701

1800

2100

2100

2500

MHz

MAX2700,

fLNAIN = 1960MHz

GAIN_SET = VCC

GAIN_SET = GND

13.5 17.1 19.5

-7.5 -1.9

2

Power Gain (Note 2)

TA = -40°C to 85°C

MAX2701,

fLNAIN = 2400MHz

GAIN_SET = VCC

GAIN_SET = GND

GAIN_SET = VCC

GAIN_SET = GND

13

20

-8

2.5

dB

13

16.5 18.5

-6

-1.8

0.5

TA = -40°C to 85°C

GAIN_SET = VCC

12.5

19

GAIN_SET = GND

-6.5

1.0

Noise Figure

MAX2700,

fLNAIN = 1960MHz

MAX2701,

fLNAIN = 2400MHz

GAIN_SET = VCC

GAIN_SET = GND

GAIN_SET = VCC

GAIN_SET = GND

2.0

15.8

dB

2.3

16.7

Input Third-Order Intercept

(Note 3)

MAX2700,

fLNAIN = 1960MHz

MAX2701,

fLNAIN = 2400MHz

GAIN_SET = VCC

GAIN_SET = GND

GAIN_SET = VCC

GAIN_SET = GND

+2.7

+5.1

+3.8

+4.3

dBm

Reverse Isolation

Isolation

VSWR

1800MHz to 2500MHz, GAIN_SET = VCC or GND

28

dB

LNAIN to LO, fLNAIN = 1800MHz to 2500MHz

LNAOUT to RFIN, fLNAIN = 1800 MHz to 2500 MHz

30

dB

44

MAX2700 GAIN_SET = VCC

1.1

At LNA input, with external GAIN_SET = GND

1.8

matching circuit at LNAIN

MAX2701 GAIN_SET = VCC

1.3

GAIN_SET = GND

2.1

−

MAX2700 GAIN_SET = VCC

1.7

At LNA output, with external GAIN_SET = GND

1.6

matching circuit at LNAOUT MAX2701 GAIN_SET = VCC

1.2

GAIN_SET = GND

1.4

MIXER STAGE (Differential RF input to mixer I/Q outputs with external balun and matching circuit to 50Ω)

Frequency Range

(Notes 1, 2)

MAX2700

MAX2701

1800

2100

2100

2500

MHz

Voltage Gain

DSB Noise Figure

MAX2700, fRFIN = 1960 MHz

MAX2701, fRFIN = 2400 MHz

MAX2700, fRFIN = 1960MHz

MAX2701, fRFIN = 2400MHz

16

19.3 21.5

dB

14.5 18.1

20

11.0

dB

12.8

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