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Maxim RRFP1A/T Bedienungsanleitung Seite 15

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Seitenansicht 14
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
A3D12D13 A0A1D0
t
CH
DIN
t
CSS
SCLK
t
CSO
t
DS
t
DH
t
CL
t
CSW
t
CSH
t
CS1
A2
t
CS
Figure 2. 3-Wire Serial-Interface Timing Diagram
Typical Operating Characteristics
(V
CC
= 2.7V, f
RF
= 2.437GHz (802.11g) or f
RF
= 5.25GHz (802.11a), f
REFOSC
= 40MHz, SHDN = CS = high, RXHP = SCLK = DIN =
low, R
BIAS
= 11kΩ, T
A
= +25°C using the MAX2828/MAX2829 evaluation kits.)
100
110
105
125
120
115
135
130
140
2.7 3.0 3.12.8 2.9 3.2 3.3 3.4 3.5 3.6
RX I
CC
vs. V
CC
MAX2828/9 toc01
V
CC
(V)
I
CC
(mA)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
105
115
110
130
125
120
145
135
155
150
140
2.7 3.0 3.12.8 2.9 3.2 3.3 3.4 3.5 3.6
TX I
CC
vs. V
CC
MAX2828/9 toc02
V
CC
(V)
I
CC
(mA)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
110
115
120
130
125
135
-35 -20 -15-30 -25 -10 -5 0
TX I
CC
vs. P
OUT
MAX2828/9 toc03
P
OUT
(dBm)
I
CC
(mA)
0
10
5
25
20
15
35
30
40
010142 6 18 20 24 2812 164 8 22 26 30 32
NOISE FIGURE
vs. BASEBAND GAIN SETTINGS
MAX2828/9 toc04
GAIN SETTINGS
NF (dB)
LNA = LOW GAIN
LNA = MEDIUM GAIN
LNA = HIGH GAIN
0
20
10
50
40
30
90
70
80
60
100
010142 6 18 20 24 2812 164 8 22 26 30 32
RX VOLTAGE GAIN
vs. BASEBAND GAIN SETTINGS
MAX2828/9 toc05
GAIN SETTINGS
GAIN (dB)
LNA = LOW GAIN
LNA = MEDIUM GAIN
LNA = HIGH GAIN
-4
-2
-3
1
0
-1
3
2
4
25 7535 55 8545 65 95
RX IN-BAND OUTPUT P-1dB
vs. GAIN
MAX2828/9 toc06
GAIN (dB)
OUTPUT P-1dB (dBV
RMS
)
LNA MEDIUM-/HIGH-GAIN
SWITCH POINT
LNA LOW-/MEDIUM-
GAIN SWITCH POINT
802.11g
MAX2828/MAX2829
Maxim Integrated
15
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