MAX2021 datasheet(3/15 Pages) MAXIM

3 / 15 page

700MHz to 1200MHz High-Linearity,

SPI-Controlled DVGA with Integrated Loopback Mixer

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AC ELECTRICAL CHARACTERISTICS (continued)

(MAX2058

Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF ≤ 1200MHz,

40MHz ≤ fLO ≤ 100MHz, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, PLO = -6dBm, fLO =

45MHz, fLBOUT = fRF - fLO, and TC = +25°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output -1dB Compression Point

(Note 3)

OP1dB

dBm

RMS Error Vector Magnitude

EVM

POUT = +12dBm, EDGE modulation

0.5

200kHz offset

-39.2

400kHz offset

-73.5

600kHz offset

-82.7

Spurious Emissions in 30kHz

Bandwidth (Note 4)

POUT = +12dBm,

EDGE modulation

1.2MHz offset

-85.7

dBc

Noise Figure

6.8

Input Return Loss

Ω source, minimum attenuation setting

Output Return Loss

Ω load, minimum attenuation setting

5-BIT DIGITAL ATTENUATORS

Insertion Loss

Attenuator measured separately ZS = ZL =

Ω

3.3

Input Third-Order Intercept Point

IIP3

Attenuator measured separately ZS = ZL =

Ω, two tones: fRF1 = 940MHz, fRF2 =

941MHz, PIN1 = PIN2 = +5dBm

dBm

Control Range

800MHz to 900MHz

±0.08

Attenuation Step Size Variation

vs. Frequency

900MHz to 1000MHz

±0.06

800MHz to 1000MHz,

TC = -40°C to +25°C

±0.002

Attenuation Variation vs.

Temperature

800MHz to 1000MHz,

TC = +25°C to +85°C

±0.003

dB/°C

Step Size

1dB

Relative Step Accuracy

800MHz to 1000MHz

-0.2

+0.4

Absolute Step Accuracy

800MHz to 1000MHz

-0.2

+0.5

Spurious Emissions in 300kHz

Bandwidth (Note 5)

No RF input, attenuator A stepped from 0 to

2dB, 7dB to 9dB, 15dB to 17dB, 0 to 31dB,

31dB to 0dB, with attenuator B at 0dB;

attenuator B stepped from 0 to 2dB, 7dB to

9dB, 15dB to 17dB, 0 to 31dB, 31dB to

0dB, with attenuator A at 0dB

-85

dBm

Switching Speed

From chip select transitioning high to the

output settling to within 1dB of steady state

output

0.3

µs

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