User Manual

MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
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0
20
40
60
80
100
120
140
160
0.50 1.000.75 1.25 1.50 1.75 2.00
MIXER BASEBAND BANDWIDTH vs. R
L
MAX2700-18
R
L
(kΩ)
BANDWIDTH (MHz)
3dB BANDWIDTH
1dB BANDWIDTH
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.5 2.7 2.9 3.1 3.3 3.5
MIXER'S OUTPUT 1dB COMPRESSION
POINT vs. V
CC
vs. R
L
MAX2700-19
V
CC
(V)
MIXER OUTPUT (Vp-p)
R
L
= 0.56kΩ
R
L
= 1.05kΩ, 2.00kΩ
190
180
170
160
150
2.5 2.92.7 3.1 3.3 3.5
I
CC
vs. V
CC
vs. TEMPERATURE
MAX2701-20
V
CC
(V)
I
CC
(mA)
T
A
= +85°C
T
A
= +25°C
T
A
= -45°C
10
13
12
11
14
15
16
17
18
19
20
2100 2200 2300 2400 2500
LNA GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2701-21
FREQUENCY (MHz)
GAIN (dB)
T
A
= -45°C
T
A
= +25°C
T
A
= +85°C
HIGH-GAIN MODE
-5
-2
-3
-4
-1
0
1
2
3
4
5
2100 2200 2300 2400 2500
LNA GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2701-22
FREQUENCY (MHz)
GAIN (dB)
T
A
= +85°C
T
A
= +25°C
T
A
= -45°C
LOW-GAIN MODE
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.)
MAX2701
MAX2700