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参数资料
| 型号： | MAX2820-MAX2821 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 2.4GHz 802.11b Zero-IF Transceivers |
| 中文描述： | 基于2.4GHz 802.11b零IF收发器 |
| 文件页数： | 3/23页 |
| 文件大小： | 392K |
| 代理商： | MAX2820-MAX2821 |
M
2.4GHz 802.11b Zero-IF Transceivers
_______________________________________________________________________________________
3
DC ELECTRICAL CHARACTERISTICS (continued)
(MAX2820/MAX2821 EV kit: V
CC
= +2.7V to +3.6V, RF_GAIN = V
IH
, 0V
≤
V
TX_GC
≤
+2.0V, 0V
≤
V
RX_AGC
≤
+2.0V, RBIAS = 12k
, no
input signals at RF and baseband inputs, all RF inputs and outputs terminated into 50
, receiver baseband outputs are open, trans-
mitter baseband inputs biased at +1.2V, registers set to default power-up settings, T
A
= -40
°
C to +85
°
C, unless otherwise noted.
Typical values are at V
CC
= +2.7V, T
A
= +25
°
C, unless otherwise noted.) (Note 1)
PARAMETERS
CONDITIONS
TX BASEBAND I/O
AC ELECTRICAL CHARACTERISTICS—RECEIVE MODE
(MAX2820/MAX2821 EV kit: V
CC
= +2.7V to +3.6V, f
RF
and f
LO
= 2400MHz to 2499MHz, f
OSC
= 22MHz or 44MHz, receive baseband
outputs = 500mV
P-P
, SHDNB = RX_ON = V
IH
, TX_ON = V
IL
, CSB = V
IH
, SCLK = DIN = V
IL
, RF_GAIN = V
IH
, 0V
≤
V
RX_AGC
≤
+2.0V,
RBIAS = 12k
, I
CP
= +2mA, BW
PLL
= 45kHz, differential RF input matched to 50
, registers set to default power-up settings, T
A
=
+25
°
C, unless otherwise noted. Typical values are at V
CC
= +2.7V, f
LO
= 2437MHz, f
OSC
= 22MHz, unless otherwise noted.) (Note 1)
MIN
TYP
MAX
UNITS
TX BB Input Common-Mode
Range
1.0
1.2
1.4
V
TX BBI and BBQ Input Bias
Current
-10
μA
TX BB Input Impedance
TX_GC Input Bias Current
TX_GC Input Impedance
REFERENCE OSCILLATOR INPUT
Differential resistance
0V
≤
V
TX_GC
≤
+2.0V
Resistance
100
10
250
k
μA
k
Reference Oscillator Input
Impedance
20
k
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RECEIVER CASCADE PERFORMANCE (RF INPUT TO BASEBAND OUTPUT)
RF Frequency Range
LO Frequency Range
2400
2400
97
95
2499
2499
MHz
MHz
T
A
= +25
°
C
T
A
= -40
°
C to +85
°
C
105
RF_GAIN = V
IH
,
V
RX_AGC
= 0V
RF_GAIN = V
IH
,
V
RX_AGC
= +2.0V
T
A
= +25
°
C
33
RF_GAIN = V
IL
,
V
RX_AGC
= 0V
T
A
= +25
°
C
75
Voltage Gain (Note 2)
RF_GAIN = V
IL
,
V
RX_AGC
= +2.0V
From RF_GAIN = V
IH
to RF_GAIN =V
IL
RF_GAIN = V
IH
, RX gain
≥
80dB
RF_GAIN = V
IH
, RX gain = 50dB
RF_GAIN = V
IL
, RX gain = 50dB
RX gain = 70dB (Note 4)
RF_GAIN = V
IH
, RX gain = 80dB
RF_GAIN = V
IL
, RX gain = 50dB
RF_GAIN = V
IH
, RX gain = 80dB
RF_GAIN = V
IL
, RX gain = 50dB
T
A
= +25
°
C
2
dB
RF Gain Step
30
3.5
4.5
34
49
-14
18
22
60
dB
4.5
DSB Noise Figure (Notes 3, 11)
dB
Adjacent Channel Rejection
dB
Input Third-Order Intercept Point (Note 5)
dBm
Input Second-Order Intercept Point (Note 6)
dBm
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