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MAX2023ETXT

High-Dynamic-Range, Direct Up-/Downconversion 1500MHz to 2500MHz Quadrature Mod/Demod

Maxim Integrated 

High-Dynamic-Range, Direct Up-/Downconversion

1500MHz to 2500MHz Quadrature Mod/Demod

AC ELECTRICAL CHARACTERISTICS (Demodulator, LO = 2350MHz) (continued)

(MAX2023 Typical Application Circuit when operated as a demodulator. I/Q outputs are recombined using network shown in

Figure 5. Losses of combining network not included in measurements. RF and LO ports are driven from 50Ω sources. Typical values

are for TC = +25°C, VCC = 5V, I/Q DC returns = 160Ω resistors to GND, PRF = 0dBm, PLO = 0dBm, fRF = 2140MHz, fLO = 2350MHz,

fIF = 210MHz, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

RF Port Impedance (R+jX)

(At RF Pin)

RF = 2140MHz,

C9 = short

Real

Imag

74.7

+j46.3

LO Port Return Loss

C3 = 3pF

23

dB

LO Port Impedance (R+jX)

(At LO Pin)

LO = 2350MHz,

C3 = short

Real

Imag

38.0

+j20.7

IF Port Differential Return Loss

27

dB

IF Port Differential Impedance

(At IF Pins) (R+jX)

IF = 210MHz,

LO = 2350MHz

Real

Imag

53.2

-j2.8

Minimum Demodulation 3dB

Bandwidth

> 1000

MHz

Minimum 1dB Gain Flatness

> 800

MHz

Note 5: Guaranteed by production test.

Note 6: Recommended functional range. Not production tested. Operation outside this range is possible, but with degraded

performance of some parameters.

Note 7: VI/Q = 2.66VP-P differential CW input.

Note 8: No baseband drive input. Measured with the baseband inputs terminated in 50Ω. At low output power levels, the output

noise density is equal to the thermal noise floor. See Output Noise Density vs. Output Power plots in Typical Operating

Characteristics.

Note 9: The output noise vs. POUT curve has the slope of LO noise (Ln dBc/Hz) due to reciprocal mixing. Measured at 10MHz off-

set from carrier.

Note 10: The LO noise (L = 10(Ln/10)), determined from the modulator measurements can be used to deduce the noise figure

under-blocking at operating temperature (TP in Kelvin), fBLOCK = 1 + (LCN - 1) TP / TO + LPBLOCK / (1000kTO), where

TO = 290K, PBLOCK in mW, k is Boltzmann’s constant = 1.381 x 10(-23) J/K, and LCN = 10(LC/10), LC is the conversion loss.

Noise figure underblocking in dB is NFBLOCK = 10 x log (fBLOCK). Refer to Application Note 3632.

5

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