W-CDMA/W-TDD/TD-SCDMA Zero-IF Receivers
MAX2391 Typical Operating Characteristics (continued)
(MAX2391 EV kit, V CC = 2.8V, HGML mode (see Table 6), f RF = 2140MHz, T A = +25°C, unless otherwise noted.)
SYNTHESIZER CLOSED-LOOP
PHASE NOISE
PLL SETTLING TIME 60MHz STEP
DEMODULATOR |S 11 | vs. FREQUENCY
-40
-50
-60
-70
f OSC = 2140MHz, I CP = 2.5mA
10
8
6
4
0
-2
-4
-6
-80
2
203 μ s
-8
-90
-100
-110
-120
-130
-140
0
-2
-4
-6
-8
-10
-10
-12
-14
-16
-18
-20
LG
HG
1
10
100
1000
0
100
200
300
400
500
600
700
2110
2120
2130
2140
2150
2160
2170
f OFFSET (kHz)
DEMODULATOR GAIN (HGML MODE)
TIME ( μ s)
CASCADED GAIN (HGML MODE)
FREQUENCY (MHz)
COMPOSITE EVM
100
90
AND NF vs. V AGC
T A = -40 ° C
T A = +25 ° C
MAX2391 toc25
22
20
120
110
AND NF vs. V AGC
T A = -40 ° C
T A = +25 ° C
MAX2391 toc26
8
7
W-CDMA: PCCPCH + SCH
EVM = 15% RMS
80
70
60
50
40
T A = +85 ° C
18
16
14
12
10
100
90
80
70
60
T A = +85 ° C
6
5
4
3
2
30
20
8
6
50
40
= CALCULATED
WITH 2dB LOSS AT
POST-LNA FILTER
1
0
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)
BASEBAND CHANNEL
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)
BASEBAND CHANNEL
+10
0
-10
-20
-30
-40
-50
-60
-70
-80
FREQUENCY RESPONSE
800
750
700
650
600
550
500
450
400
350
GROUP DELAY vs. FREQUENCY
-90
0.003 0.01
0.1
1
10
30
300
0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3
FREQUENCY (MHz)
f OFFSET (MHz)
______________________________________________________________________________________
11
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