Low-Voltage IF Transceiver with
Limiter/RSSI and Quadrature Modulator
____________________________ Typical Operating Characteristics (continued)
(MAX2510 EV kit; V CC = +3.0V; 0.01μF across CZ and CZ ; MIXOUT tied to VREF through 165 ? resistor; TXOUT and TXOUT loaded
with 100 ? differential; LO terminated with 50 ? ; LO AC grounded; GC open; LIMOUT, LIMOUT open; 330pF at RSSI pin; 0.1μF con-
nected from VREF pin to GND; P RXIN, RXIN = -30dBm differentially driven (input matched); f RXIN, RXIN = 240MHz; bias voltage at I, I ,
Q, Q = 1.4V; V I,Q = 500mVp-p; f I, Q = 200kHz; f LO, LO = 230MHz; P LO = -13dBm; T A = +25°C; unless otherwise noted.)
1.0
0.8
TRANSMITTER OUTPUT POWER
vs. SUPPLY VOLTAGE
T A = +25°C
-10
-12
-14
-16
OUTPUT POWER
vs. BASEBAND INPUT VOLTAGE
GC = OPEN
50
40
TRANSMITTER SIDEBAND SUPPRESSION
vs. RF FREQUENCY
0.6
T A = +85°C
-18
30
-20
0.4
T A = -40° C
-22
20
-24
0.2
0
-26
-28
-30
10
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
50
100
150
200
250
300
350
400
0
200
400
600
800
1000
SUPPLY VOLTAGE (V)
TRANSMITTER DIFFERENTIAL
OUTPUT IMPEDANCE vs. FREQUENCY
BASEBAND INPUT VOLTAGE (mVp)
TRANSMIT NOISE POWER
vs. GC VOLTAGE
RF FREQUENCY (MHz)
TRANSMITTER OUTPUT POWER
vs. LO POWER
100
0
-100
-200
-300
Tx MODE REAL
Tx OFF REAL
-134
-136
-138
-140
-142
Af = 200kHz
-13.0
-13.5
-14.0
-14.5
-15.0
-400
-500
-600
-700
-800
-900
-1000
Tx OFF
IMAGINARY
Tx MODE
IMAGINARY
-144
-146
-148
-150
-152
-154
-15.5
-16.0
-16.5
-17.0
-17.5
-18.0
200
300
400
500
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
-20 -18 -16 -14 -12 -10 -8
-6
-4
-2
0
FREQUENCY (MHz)
GC VOLTAGE (V)
LO POWER (dBm)
_______________________________________________________________________________________
7
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