MAX2511 查看數據表（PDF） - Maxim Integrated
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MAX2511 Datasheet PDF : 16 Pages
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Low-Voltage IF Transceiver
with Limiter and RSSI
____________________________Typical Operating Characteristics (continued)
(MAX2511 test fixture, VCC = +3.0V, 0.01µF across CZ and CZ, MIXOUT tied to VREF through 165Ω resistor, TXIN, TXIN tied to
VREF through 50Ω resistor, TXOUT and TXOUT loaded with 100Ω differential, GC open, LIMOUT, LIMOUT loaded with 2kΩ differ-
ential, TANK and TANK driven with -2.5dBm from a 100Ω source; OSCOUT AC-terminated with 50Ω, 100pF at RSSI pin, 0.1µF at
VREF pin, Rx inputs and Tx outputs differentially coupled, PRXIN, RXIN = -28dBm (200Ω system), fRXIN, RXIN = 425MHz, fLO = 435.7MHz,
fTXIN, TXIN = 10.7MHz, TA = +25°C, unless otherwise noted.)
DOWNCONVERTER IMAGE REJECTION
vs. RXIN FREQUENCY
45
40
35
30
DOWNCONVERTER-MIXER IMAGE
REJECTION vs. TEMPERATURE
AND SUPPLY VOLTAGE
40
38
36
VCC = 5.5V
34
32
30
VCC = 2.7V
VCC = 3.0V
28
DOWNCONVERTER IMAGE REJECTION
vs. IF FREQUENCY
40
TXEN = LOW
35
RXEN = HIGH
30
25
20
15
10
5
25
200
250
300
350
FREQUENCY (MHz)
400 425
26
-40 -20 0 20 40 60
85
TEMPERATURE (°C)
0
0
10
20
30
40
50
IF FREQUENCY (MHz)
DOWNCONVERTER INPUT 1dB
COMPRESSION LEVEL
70
TA = +85°C
60
50
40
TA = -40°C
30
TA = +25°C
20
TXEN = LOW
RXEN = HIGH
10
0
2.7 3.0 3.5 4.0 4.5 5.0 5.5
VCC (V)
RXIN DIFFERENTIAL INPUT IMPEDANCE
vs. FREQUENCY
250
200
RX OFF REAL
150
100
50
RX MODE REAL
0
-50
RX MODE IMAGINARY
-100
-150
-200
-250
200
RX OFF IMAGINARY
300
400
500
FREQUENCY (MHz)
LIMITER OUTPUT LEVEL
vs. GC VOLTAGE
1.2
TA = -40°C
1.0
TA = +25°C
.8
TA = +85°C
.6
.4
.2
TXEN = LOW
RXEN = HIGH
0
0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.0
GC VOLTAGE (V)
6 _______________________________________________________________________________________
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