MAX2821ETM Datasheet, PDF (8/26 Pages) KOA Speer Electronics, Inc. – 2.4GHz 802.11b Zero-IF Transceivers

2.4GHz 802.11b Zero-IF Transceivers
Typical Operating Characteristics
(MAX2820/MAX2821 EV kit, V_CC = +2.7V, f_BB = 1MHz, f_LO = 2450MHz, receive baseband outputs = 500mV_P-P, transmit base-
band inputs = 400mV_P-P, I_CP = +2mA, BW_PLL = 45kHz, differential RF input/output matched to 50Ω through a balun, baseband
input biased at +1.2V, registers set to default power-up settings, T_A = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
100
90 ^{RECEIVE, VRF_GAIN = VIH}
80
70
60
TRANSMIT RECEIVE, V_{RF_GAIN} = V_IL
50
SUPPLY CURRENT vs. SUPPLY VOLTAGE
100
90 ^{RECEIVE, VRF_GAIN = VIH}
80
70
60
TRANSMIT _{RECEIVE, VRF_GAIN = VIL}
50
RECEIVER VOLTAGE GAIN
vs. GAIN-CONTROL VOLTAGE
120
V_{RF_GAIN} = V_IH
100
V_{RF_GAIN} = V_IH,
("A" VERSION)
80
V_{RF_GAIN} = V_IL,
("A" VERSION)
60
40
40
30
30
V_{RF_GAIN} = V_IL
40
20
20
20 ^VOUT ^{= 500mV}P-P
10
STANDBY
10
STANDBY
f_BB = 1MHz
f_LO = 2450MHz
0
0
0
-40 -15
10
35
60
85
2.7
3.0
3.3
3.6
0
0.5
1.0
1.5
2.0
TEMPERATURE (°C)
V_CC (V)
V_{RX_AGC} (V)
RECEIVER VOLTAGE GAIN
vs. RF FREQUENCY
40
f_BB = 1MHz
35
30
25
V_{RF_GAIN} = V_IH, V_{RX_AGC} = 2.0V
20
15
10
V_{RF_GAIN} = V_IL, V_{RX_AGC} = 2.0V
5
RECEIVER NOISE FIGURE vs. GAIN
50
45
40
V_{RF_GAIN} = V_IL
35
30
25
20
15
10 _{fBB = 1MHz}
5 ^fLO ^{= 2450MHz}
V_{RF_GAIN} = V_IH
RECEIVER DETECTOR HYSTERESIS
vs. INPUT POWER
MAX2820/MAX2821 ONLY
HIGH
HIGH-GAIN MODE
LOW
HIGH
LOW-GAIN MODE
LOW
0
2400 2420 2440 2460 2480 2500
RF FREQUENCY (MHz)
0
0
20
40
60
80 100
RX GAIN (dB)
-65 -60 -55 -50 -45 -40 -35
P_IN (dBm)
RECEIVER FILTER RESPONSE
(1kHz TO 1MHz)
10
0
-10
-20
RX_1K = V_IH
RX_1K = V_IH,
-30
("A" VERSION)
-40
-50 RX_1K = V_IL,
-60 ^{(BOTH VERSIONS)}
-70
-80
-90
1
10
100
1000
FREQUENCY (kHz)
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
1
RECEIVER FILTER RESPONSE
(1MHz TO 100MHz)
"A" VERSION
10
100
FREQUENCY (MHz)
RECEIVER LEAKAGE SPECTRUM
-10
-20
V_{RF_GAIN} = V_IH
-30
f_LO = 2400MHz
-40
-50
-60
-70
-80
-90
-100
-120
0 0.8 1.6 2.4 3.2 4.0 4.8 5.6 6.4 7.2 8.0
FREQUENCY (GHz)
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