Rainbow Electronics MAX2701 - Manual (Page 12)

MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
12 ______________________________________________________________________________________
0
2
1
4
3
5
6
-45 15 35 -25 -5 55 75
LNA IIP3 vs. TEMPERATURE
MAX2701-26
TEMPERATURE ( ° C)
IIP3 (dBm) HIGH-GAIN MODE
LOW-GAIN MODE
-1
1
0
3
2
5
4
6
LNA IIP3 vs. V CC
MAX2701-27
V CC (V)
IIP3 (dBm)
2.50 2.75 3.00 3.25 3.50
HIGH-GAIN MODE
LOW-GAIN MODE
10
12
16
14
18
20
LNA NOISE FIGURE vs. FREQUENCY
vs. TEMPERATURE
MAX2701-25
FREQUENCY (MHz)
NF (dB)
2100 2300 2200 2400 2500
T A = +85°C
T A = +25°C T A = -45°C
LOW-GAIN MODE
3.5
3.0
2.5
2.0
1.5
2100 2300 2200 2400 2500
LNA NOISE FIGURE vs. FREQUENCY
vs. TEMPERATURE
MAX2701-24
FREQUENCY (MHz)
NF (dB)
T A = -45°C
T A = +25°C T A = +85°C
HIGH-GAIN MODE
15
17
16
19
18
21
20
22
MIXER VOLTAGE GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2701-28
FREQUENCY (GHz)
VOLTAGE GAIN (dB)
2.1 2.2 2.3 2.4 2.5
T A = -45°C
T A = +25°C
T A = +85°C
DOUBLER ENABLED
-34
-32
-28
-30
-26
-24
LNA REVERSE ISOLATION
vs. FREQUENCY
MAX2701-23
FREQUENCY (MHz)
S
12
(dB)
2100 2300 2200 2400 2500
HIGH-GAIN MODE
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 50 Ω source, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2k Ω load; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1k
Ω
AC-coupled source; IOUT1, QOUT1 AC-coupled to 2k
Ω
; IOUT2, QOUT2 AC-coupled to
100
Ω
; input to VGAs, 20mVp-p at 1MHz tone, set V AGC = 1.25V, unless otherwise noted.)
MAX2701