W-CDMA/W-TDD/TD-SCDMA Zero-IF Receivers
MAX2401 Typical Operating Characteristics (continued)
(MAX2401 EV kit, V CC = 2.8V, HGML mode (see Table 6), f RF = 1842.4MHz, T A = +25°C, unless otherwise noted.)
SYNTHESIZER CLOSED-LOOP
PHASE NOISE
PLL SETTLING TIME 60MHz STEP
DEMODULATOR |S 11 | vs. FREQUENCY
-60
-70
-80
f OSC = 1842.4MHz, I CP = 2.5mA
10
8
6
4
-12
-15
HGML
-90
-100
-110
-120
-130
2
0
-2
-4
-6
-8
-10
203 μ s
-18
-21
-24
LG
1
10
100
1000
0
100
200
300
400
500
600
700
1805
1820
1835
1850
1865
1880
f OFFSET (kHz)
DEMODULATOR GAIN AND NF vs. V AGC
TIME ( μ s)
FREQUENCY (MHz)
CASCADED GAIN AND NF vs. V AGC
100
90
80
T A = -40 ° C
T A = +25 ° C
T A = +85 ° C
MAX2401 toc92
21
19
17
120
110
100
T A = -40 ° C
T A = +25 ° C
T A = +85 ° C
MAX2401 toc93
9
8
7
70
60
50
40
30
15
13
11
9
7
90
80
70
60
50
40
CALCULATED
WITH 1.4dB LOSS
AT POST-LNA
FILTER
6
5
4
3
2
1
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
V AGC (V)
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
V AGC (V)
COMPOSITE EVM
W-CDMA: PCCPCH + SCH
EVM = 16% RMS
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
BASEBAND CHANNEL
RESPONSE vs. FREQUENCY
1200
1100
1000
900
800
700
600
500
400
BASEBAND CHANNEL
GROUP DELAY vs. FREQUENCY
0.001
0.01
0.1
1
10
100
0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3
f OFFSET (MHz)
f OFFSET (MHz)
20
______________________________________________________________________________________
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