MAX2021 datasheet(5/20 Pages) MAXIM

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MAX2021

High-Dynamic-Range, Direct Up-/Downconversion

650MHz to 1200MHz Quadrature Mod/Demod

Maxim Integrated

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

fRF1 = 780MHz, fRF2 = 781MHz,

PRF1 = PRF2 = 0dBm, fIF1 = 185MHz,

fIF2 = 184MHz, fIF1+ fIF2 term

70.1

Input Second-Order Intercept

Point

IIP2

fRF1 = 780MHz, fRF2 = 735MHz,

PRF1 = PRF2 = 0dBm, fIF1 = 185MHz,

fIF2 = 230MHz, fIF1+ fIF2 term

70.2

dBm

2LO - 2RF, fRF = 872.5MHz, PRF = -10dBm

3LO - 3RF, fRF = 903.333MHz, PRF = -10dBm

3RF - 2LO, fRF = 705MHz, PRF = -10dBm

105

4RF - 3LO, fRF = 770MHz, PRF = -10dBm

114

Spurious Relative to a

Fundamental at 780MHz

5RF - 4LO, fRF = 809MHz, PRF = -10dBm

115

dBc

Input Compression from Linear

PRF = 0dBm to 21dBm

0.17

I/Q Gain Mismatch

0.05

I/Q Phase Mismatch

0.4

Degrees

1dB Conversion Loss Flatness

fLO = 965MHz, fLO > fRF

400

MHz

RF Return Loss

LO Return Loss

Note 5:

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

performance of some parameters.

Note 6:

Guaranteed by design and characterization.

Note 7:

Parameter also applies to demodulator topology.

Note 8:

Single-carrier WCDMA with 10.5dB peak-to-average ratio at 0.1% complementary cumulative distribution function,

PRF = -10dBm (PRF is chosen to give -65dBc ACLR).

Note 9:

No baseband drive input. Measured with the inputs terminated in 50

Ω. At low output levels, the output noise is thermal.

Note 10: The output noise versus POUT curve has the slope of LO noise (Ln dBc/Hz) due to reciprocal mixing.

Note 11: Conversion loss is measured from the single-ended RF input to single-ended combined baseband output.

Note 12: 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 under-blocking in dB is NFBLOCK = 10 x log (FBLOCK). Refer to Application Note 3632: Wideband LO Noise in

Passive Transmit-Receive Mixer ICs.

AC ELECTRICAL CHARACTERISTICS (Demodulator LO = 965MHz) (continued)

(

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 50

Ω sources. Typical values are for TA = +25°C,

VCC = 5.0V, I/Q DC voltage return = 0V, PRF = 0dBm, PLO = 0dBm, fRF = 780MHz, fLO = 965MHz, fIF = 185MHz, unless otherwise noted.)

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