User Manual

MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
10 ______________________________________________________________________________________
2.00
1.75
1.50
1.25
1.00
1.7 1.91.8 2.0 2.1
φ ERROR vs. LO FREQUENCY
MAX2700-15
FREQUENCY (GHz)
φ ERROR (DEGREES)
DOUBLER ENABLED
DOUBLER DISABLED
-40
-45
-50
-55
-60
0.85 0.950.90 1.00 1.05
LO-RFIN ISOLATION vs. LO FREQUENCY
(INCLUDING BALUN)
MAX2700-16
FREQUENCY (GHz)
LO-RFIN ISOLATION (dB)
DOUBLER DISABLED
DOUBLER ENABLED
5
15
10
25
20
30
35
2.60 3.102.85 3.35
MIXER IIP2 vs. V
CC
vs. TEMPERATURE
MAX2700-14
V
CC
(V)
IIP2 (dBm)
T
A
= -45°C
T
A
= +85°C
T
A
= +25°C
DOUBLER ENABLED
0
1
2
3
4
5
6
7
8
2.60 2.85 3.10 3.35
MIXER IIP3 vs. V
CC
vs. TEMPERATURE
MAX2700-13
V
CC
(V)
IIP3 (dBm)
T
A
= -45°C
T
A
= +85°C
T
A
= +25°C
DOUBLER ENABLED
-40
-50
-60
-70
-80
0.85 0.950.90 1.00 1.05
LO-LNAIN ISOLATION vs. LO FREQUENCY
MAX2700-17
FREQUENCY (GHz)
LO-LNAIN ISOLATION (dB)
DOUBLER DISABLED
DOUBLER ENABLED
7
8
9
10
11
12
13
14
15
1800 19001850 1950 2000 2050 2100
DSB MIXER NOISE FIGURE vs. FREQUENCY
vs. TEMPERATURE
MAX2700-12
FREQUENCY (MHz)
NF (dB)
T
A
= +85°C
T
A
= -45°C
T
A
= +25°C
Typical Operating Characteristics (continued)
(MAX2700/MAX2701 EV kit (Figure 3), V
CC
= +3.0V, T
A
= +25°C, SHDN = GAIN_SET = V
CC
, X2_EN = GND, CEXT+ connected to
CEXT-, P
LO
= -13dBm, F
LO
= 980MHz (MAX2700) and 1200MHz (MAX2701), P
LNAIN
= -30dBm, P
RFIN
= -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ω source, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩ load; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩ AC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set V
AGC
= 1.25V, unless otherwise noted.)
MAX2700