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2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
Typical Operating Characteristics (continued)
(MAX2831 EV kit, V CC_ = 2.8V, V CCPA = V CCTXPA = 3.3V, T A = +25°C, f LO = 2.437GHz, f REF = 40MHz, SHDN = CS = high, RXHP =
SCLK = DIN = low.)
LO PHASE NOISE
CHANNEL SWITCHING FREQUENCY
LO FREQUENCY vs. V TUNE
vs. OFFSET FREQUENCY
SETTLING (FROM 2500MHz TO 2400MHz)
2600
-50
50kHz
MAX2831/32 toc55
-60
2550
2500
-70
-80
-90
2450
2400
2350
-100
-110
-120
-130
-140
10kHz/
div
2300
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
-150
0.001
0.01 0.1 1
10
-50kHz
0
250 μ s
V TUNE (V)
OFFSET FREQUENCY (MHz)
PLL SETTLING TIME FROM
SHUTDOWN TO STANDBY MODE
PLL SETTLING TIME
FROM STANDBY TO Tx
Rx TO Tx TURNAROUND
PLL SETTLING TIME
50kHz
MAX2831/32 toc56
50kHz
MAX2831/32 toc57
25kHz
MAX2831/32 toc58
10kHz/
div
10kHz/
div
5kHz/
div
-50kHz
0
2ms
-50kHz
0
30 μ s
-25kHz
0
50 μ s
CRYSTAL-OSCILLATOR OFFSET FREQUENCY
Tx-Rx TURNAROUND PLL SETTLING TIME
CLOCK OUTPUT
vs. CRYSTAL-OSCILLATOR TUNING BITS
25kHz
MAX2831/32 toc59
f CLOCK = 40MHz
C LOAD = 5pF
MAX2831/32 toc60
800
700
600
500
KYOCERA
(CX-3225SB)
400
5kHz/div
3V
0V
300
200
100
0
-100
-200
-300
-400
-500
-600
-700
-25kHz
0
50 μ s
10ns/div
-800
0 10 20 30 40 50 60 70 80 90 100110120130
C TUNE (DIGITAL BITS)
______________________________________________________________________________________
17
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