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2.4GHz 802.11b Zero-IF Transceivers
ABSOLUTE MAXIMUM RATINGS
V CC Pins to GND ...................................................-0.3V to +4.2V
RF Inputs: RX_RFP, RX_RFN to GND.........-0.3V to (V CC + 0.3V)
RF Outputs: TX_RFP, TX_RFN to GND..................-0.3V to +4.2V
Baseband Inputs: TX_BBIP, TX_BBIN, TX_BBQP,
TX_BBQN to GND ...................................-0.3V to (V CC + 0.3V)
Baseband Outputs: RX_BBIP, RX_BBIN, RX_BBQP,
RX_BBQN to GND ...................................-0.3V to (V CC + 0.3V)
Analog Inputs: RX_AGC, TX_GC, TUNE, ROSCN,
ROSCP to GND .......................................-0.3V to (V CC + 0.3V)
Analog Outputs: PA_BIAS, CP_OUT, VREF
to GND.....................................................-0.3V to (V CC + 0.3V)
Digital Inputs: RX_ON, TX_ON, SHDNB, CSB, SCLK,
DIN, RF_GAIN, RX_1K to GND................-0.3V to (V CC + 0.3V)
Bias Voltages: RBIAS, BYP ..................................+0.9V to +1.5V
Short-Circuit Duration Digital Outputs: DOUT, RX_DET .........10s
RF Input Power: RX_RFN, RX_RFP.................................+10dBm
Continuous Power Dissipation (T A = +70 ° C)
48-Lead QFN (derate 27.0mW/ ° C above +70 ° C)...........2162mW
48-Lead Thin QFN (derate 38.5mW/ ° C
above +70 ° C) ...................................................................3077mW
Operating Temperature Range ...........................-40 ° C to +85 ° C
Junction Temperature ......................................................+150 ° C
Storage Temperature Range .............................-65 ° C to +160 ° C
Lead Temperature (soldering, 10s) .................................+300 ° C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
CAUTION! ESD SENSITIVE DEVICE
DC ELECTRICAL CHARACTERISTICS
(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
Supply Voltage
CONDITIONS
MIN
2.7
TYP
MAX
3.6
UNITS
V
Shutdown-Mode Supply Current
(MAX2821 and MAX2821A)
Standby-Mode Supply Current
Receive-Mode Supply Current
Transmit-Mode Supply Current
SHDNB = V IL , RX_ON = V IL ,
TX_ON = V IL
SHDNB = V IH , RX_ON = V IL ,
TX_ON = V IL
SHDNB = V IH , RX_ON = V IH ,
TX_ON = V IL
SHDNB = V IH , RX_ON = V IL ,
TX_ON = V IH
T A = -40 ° C to +85 ° C
T A = +25 ° C
T A = -40 ° C to +85 ° C
T A = +25 ° C
T A = -40 ° C to +85 ° C
T A = +25 ° C
T A = -40 ° C to +85 ° C
2
25
80
70
50
35
40
100
110
85
90
μA
mA
mA
mA
LOGIC INPUTS: SHDNB, RX_ON, TX_ON, SCLK, DIN, CSB, RF_GAIN
Digital Input Voltage High (V IH )
Digital Input Voltage Low (V IL )
V CC - 0.5
0.5
V
V
Digital Input Current High (I IH )
Digital Input Current Low (I IL )
-5
-5
+5
+5
μA
μA
LOGIC OUTPUTS: DOUT, RX_DET
Digital Output Voltage High (V OH )
Digital Output Voltage Low (V OL )
Sourcing 100μA
Sinking 100μA
V CC - 0.5
0.5
V
V
RX BASEBAND I/O
RX_AGC Input Resistance
RX I/Q Common-Mode Voltage
RX I/Q Output DC Offsets
0V ≤ V RX_AGC ≤ +2.0V
50
1.25
15
k ?
V
mV
VOLTAGE REFERENCE (MAX2821/MAX2821A)
Reference Voltage Output
T A = -40 ° C to +85 ° C, I LOAD = ±2mA
1.1
1.2
1.3
V
Output Impedance
25
?
2
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