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MAX2021ETX-T

High-Dynamic-Range, Direct Up-/Downconversion 750MHz to 1200MHz Quadrature Mod/Demod

Maxim Integrated 

High-Dynamic-Range, Direct Up-/Downconversion

750MHz to 1200MHz Quadrature Mod/Demod

Typical Operating Characteristics

(MAX2021 Typical Application Circuit, VCC = +4.75V to +5.25V, GND = 0V, I/Q differential inputs driven from a 100Ω DC-coupled

source, 0V common-mode input, PRF = 5dBm, PLO = 0dBm, 750MHz ≤ fLO ≤ 1200MHz, 50Ω LO and RF system impedance, R1 = 432Ω,

R2 = 619Ω, R3 = 332Ω, TC = -40°C to +85°C. Typical values are at VCC = +5V, fLO = 900MHz, TC = +25°C, unless otherwise noted.)

DEMODULATOR CONVERSION LOSS

vs. LO FREQUENCY

12

PLO = 0dBm, VCC = 5.0V

11

TC = +25°C

TC = +85°C

10

DEMODULATOR

DEMODULATOR INPUT IP3

vs. LO FREQUENCY

40

PLO = 0dBm, TC = +25°C

38

VCC = 5.25V

36

DEMODULATOR INPUT IP3

vs. LO FREQUENCY

40

PLO = 0dBm, VCC = 5.0V

TC = +25°C

38

TC = -40°C

36

9

34

VCC = 5.0V

34

8

TC = -40°C

32

VCC = 4.75V

32

TC = +85°C

7

750

825 900 975 1050 1125 1200

LO FREQUENCY (MHz)

DEMODULATOR INPUT IP2

vs. LO FREQUENCY

90

PLO = 0dBm, VCC = 5.0V

80

TC = +25°C

70

TC = +85°C

60

TC = -40°C

50

750

0

825 900 975 1050 1125 1200

LO FREQUENCY (MHz)

LO PORT RETURN LOSS

vs. LO FREQUENCY

PLO = +3dBm

+5

PLO = 0dBm

+10

+15

PLO = -6dBm, -3dBm

+20

30

750

825 900 975 1050 1125 1200

LO FREQUENCY (MHz)

DEMODULATOR PHASE IMBALANCE

vs. LO FREQUENCY

10

PLO = +3dBm

8

6

PLO = -3dBm

4

PLO = 0dBm

2

0

-2

-4 PLO = -6dBm

-6

-8

-10

750

825 900 975 1050 1125 1200

LO FREQUENCY (MHz)

RF PORT RETURN LOSS

vs. LO FREQUENCY

0

+5

+10

+15

+20

+25

+30 PLO = -6dBm, -3dBm, 0dBm, +3dBm

+35

+40

30

750 825 900 975 1050 1125 1200

LO FREQUENCY (MHz)

DEMODULATOR AMPLITUDE IMBALANCE

vs. LO FREQUENCY

0.20

0.15

0.10

0.05

0

PLO = -6dBm, -3dBm, 0dBm, +3dBm

-0.05

-0.10

-0.15

-0.20

750

-4

-5

-6

825 900 975 1050 1125 1200

LO FREQUENCY (MHz)

IF FLATNESS

vs. BASEBAND FREQUENCY

PLO = 0dBm

fLO = 900MHz

-7

-8

-9

fLO = 1000MHz

-10

-11

+25

750

825 900 975 1050 1125 1200

+45

750 845 940 1035 1130 1225

-12

0 10 20 30 40 50 60 70 80

LO FREQUENCY (MHz)

LO FREQUENCY (MHz)

BASEBAND FREQUENCY (MHz)

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