MAX2701ECM datasheet(16/28 Pages) MAXIM

16 / 28 page

1.8GHz to 2.5GHz Direct Downconversion

Receivers

______________________________________________________________________________________

100

VGA2

BANDWIDTH vs. RS

RS (kΩ)

0.6

1.2

1.4

0.8

1.0

1.6

1.8

2.0

3dB BANDWIDTH

1dB BANDWIDTH

-60

-50

-55

-40

-45

-35

-30

100

500

300

700

900

1100

VGA2

Q TO I CROSSTALK vs. RL

RL (Ω)

1.8

1.9

2.1

2.0

2.2

2.3

0.75

1.25

1.00

1.50

1.75

2.00

VGA2

VGA OUTPUT 1dB COMPRESSION

POINT vs. AGC VOLTAGE vs. RL

AGC (V)

RL = 1.025kΩ

RL = 0.1kΩ

RL = 0.56kΩ

RL = 0.25kΩ

0.4

1.2

0.8

1.6

2.0

0.50

1.00

0.75

1.25

1.50

1.75

2.00

VGA2

I/Q VOLTAGE GAIN MISMATCH WITH

GAIN CORRECTION

AGC (V)

2dB INPUT MISMATCH

GAIN CORRECTION ENABLED

100

300

200

400

500

COMBINED VGA1 AND VGA2 TURN-ON TIME

vs. DC OFFSET CAPACITANCE*

DC OFFSET CAPACITANCE (nF)

050

100

-1

0.50

1.25

0.75

1.00

1.50

1.75

2.00

VGA2

I/Q VOLTAGE GAIN MISMATCH

vs. TEMPERATURE

AGC (V)

TA = -45°C

TA = +85°C

TA = +25°C

0dB INPUT MISMATCH

GAIN CORRECTION DISABLED

Typical Operating Characteristics (continued)

(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 50

Ω source, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩ load; IIN1+,

QIN1+, IIN2+, QIN2+ driven from 1.1k

Ω AC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to

100

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

MAX2700/MAX2701

*C19, C23, C30, C36 in the

EV kit schematic in Figure 3

represent DC offset capacitors.

Time from SHDN = GND to

SHDN = VCC, until DC quiescent

point settles within 10% of static

DC quiescent point.

MAX2701ECM Datasheet(PDF) 16 Page - Maxim Integrated Products

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