MAX2021 datasheet(4/15 Pages) MAXIM

4 / 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

LOOPBACK MIXER

LO Frequency (Note 2)

fLO

100

MHz

LO Input Power

PLO

-6

dBm

Output Power (Note 6)

PIN = +5dBm, fRF = 940MHz, TC = +25°C

-14.7

-12.7

-10.8

dBm

800MHz to 900MHz

±1.7

Gain Accuracy

PIN = +5dBm, TC

= -40°C to +25°C

900MHz to 1000MHz

±1.7

Output Third-Order Intercept

Point (Note 6)

OIP3

Two tones: fRF1 = 940MHz, fRF2 = 940.2MHz,

PIN1 = PIN2 = +2dBm, TC = +25°C

10.6

dBm

Output Noise Floor

PIN = +5dBm

-137

dBc/Hz

LB_EN enable time

0.12

ON/OFF Switching Time

LB_EN disable time

0.12

µs

LBOUT to ATTEN_OUTB Isolation

Mixer enabled, attenuators A and B both set

to 31dB, PIN = +5dBm

ATTEN_OUTB to LBOUT Isolation

Mixer disabled, PIN = 0dBm

Mixer enabled, 50

Ω load

Output Return Loss

Mixer disabled, 50

Ω load

LO Port Return Loss

Ω source

SERIAL PERIPHERAL INTERFACE (SPI)

Maximum Clock Speed

MHz

Data to Clock Setup Time

tCS

1ns

Data to Clock Hold Time

tCH

9ns

Clock to

CS Setup Time

tES

4ns

CS Positive Pulse Width

tEW

CS Negative Pulse Width

tEWN

CLOCK Pulse Width

tCW

Note 1: All limits include external component losses. Output measurements taken at RFOUT or LBOUT ports of the

Typical

Application Circuit.

Note 2: Operating outside this range is possible, but with degraded performance of some parameters.

Note 3: Compression point characterized. It is advisable not to continuously operate the VGA RF input above +15dBm.

Note 4: Input RF source contribution to spurious emissions (Agilent ESG 4435B, PSA E4443A): 200kHz = -39.2dBc,

400kHz = -73.5dBc, 600kHz = -83.2dBc, 1.2MHz = -85.7dBc

Note 5: No SPI clock input applied.

Note 6: Guaranteed by design and characterization.

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