User Manual

MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
_______________________________________________________________________________________ 9
10
12
14
16
18
20
22
24
1.7 1.8 1.9 2.0 2.1
MIXER VOLTAGE GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2700-09
FREQUENCY (GHz)
VOLTAGE GAIN (dB)
T
A
= -45°C
T
A
= +85°C
T
A
= +25°C
DOUBLER ENABLED
13
14
16
15
17
18
LNA NOISE FIGURE vs. FREQUENCY
vs. TEMPERATURE
MAX2700-06
FREQUENCY (MHz)
NF (dB)
1700 19001800 2000
T
A
= +85°C
T
A
= +25°C
T
A
= -45°C
LOW-GAIN MODE
10
12
14
16
18
20
22
24
1.7 1.8 1.9 2.0 2.1
MIXER VOLTAGE GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2700-10
FREQUENCY (GHz)
VOLTAGE GAIN (dB)
T
A
= -45°C
T
A
= +85°C
T
A
= +25°C
DOUBLER DISABLED
10
12
14
16
18
20
22
24
1.7 1.8 1.9 2.0 2.1
MIXER VOLTAGE GAIN vs. FREQUENCY
vs. LO POWER
MAX2700-11
FREQUENCY (GHz)
VOLTAGE GAIN (dB)
LO = -16dBm TO -10dBm
DOUBLER DISABLED
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.)
0
2
1
4
3
5
6
-45 15 35-25 -5 55 75
LNA IIP3 vs. TEMPERATURE
MAX2700-07
TEMPERATURE (°C)
IIP3 (dBm)
HIGH-GAIN MODE
LOW-GAIN MODE
0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
2.50 2.75 3.00 3.25 3.50
LNA IIP3 vs. V
CC
MAX2700-08
V
CC
(V)
IIP3 (dBm)
0.5
HIGH-GAIN MODE
LOW-GAIN MODE
MAX2700