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700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2058 Typical Application Circuit, V CC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ f RF ≤ 1200MHz,
40MHz ≤ f LO ≤ 100MHz, T C = -40°C to +85°C. Typical values are at V CC = 5.0V, P IN = 0dBm, f RF = 940MHz, P LO = -6dBm, f LO =
45MHz, f LBOUT = f RF - f LO , and T C = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Output -1dB Compression Point
(Note 3)
OP 1dB
19
dBm
RMS Error Vector Magnitude
EVM
P OUT = +12dBm, EDGE modulation
0.5
%
200kHz offset
-39.2
Spurious Emissions in 30kHz
Bandwidth (Note 4)
P OUT = +12dBm,
EDGE modulation
400kHz offset
600kHz offset
-73.5
-82.7
dBc
1.2MHz offset
-85.7
Noise Figure
Input Return Loss
Output Return Loss
NF
50 Ω source, minimum attenuation setting
50 Ω load, minimum attenuation setting
6.8
18
20
dB
dB
dB
5-BIT DIGITAL ATTENUATORS
Insertion Loss
Attenuator measured separately Z S = Z L =
50 Ω
3.3
dB
Attenuator measured separately Z S = Z L =
Input Third-Order Intercept Point
IIP3
50 Ω , two tones: f RF1 = 940MHz, f RF2 =
44
dBm
941MHz, P IN1 = P IN2 = +5dBm
Control Range
31
dB
Attenuation Step Size Variation
vs. Frequency
Attenuation Variation vs.
Temperature
Step Size
Relative Step Accuracy
Absolute Step Accuracy
800MHz to 900MHz
900MHz to 1000MHz
800MHz to 1000MHz,
T C = -40°C to +25°C
800MHz to 1000MHz,
T C = +25°C to +85°C
800MHz to 1000MHz
800MHz to 1000MHz
±0.08
±0.06
±0.002
±0.003
1
-0.2
+0.4
-0.2
+0.5
dB
dB/°C
dB
dB
dB
No RF input, attenuator A stepped from 0 to
2dB, 7dB to 9dB, 15dB to 17dB, 0 to 31dB,
Spurious Emissions in 300kHz
Bandwidth (Note 5)
31dB to 0dB, with attenuator B at 0dB;
attenuator B stepped from 0 to 2dB, 7dB to
-85
dBm
9dB, 15dB to 17dB, 0 to 31dB, 31dB to
0dB, with attenuator A at 0dB
From chip select transitioning high to the
Switching Speed
output settling to within 1dB of steady state
0.3
μs
output
_______________________________________________________________________________________
3
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