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PDF MAX2822 Data sheet ( Hoja de datos )
| Número de pieza | MAX2822 | |
| Descripción | 2.4 Ghz Zero-IF Transceiver | |
| Fabricantes | Maxim Integrated | |
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19-2884; Rev 0; 7/03
EVAALVUAAILTAIOBNLEKIT
2.4GHz 802.11b Zero-IF Transceiver
with Integrated PA and Tx/Rx Switch
General Description
The MAX2822 single-chip transceiver is designed for
802.11b (11Mbps) applications operating in the 2.4GHz
to 2.5GHz ISM band. The transceiver includes all the
circuitry required to implement an 802.11b RF-to-base-
band transceiver solution, including the power amplifi-
er, transmit/receive switch, and 50Ω matching. The fully
integrated receive path, transmit path, VCO, frequency
synthesis, and baseband/control interface provide all
the required active RF circuitry. Only a small number of
passive components are needed to form the complete
radio front-end solution.
The IC eliminates the need for external IF SAW and RF
image-reject filters by utilizing a direct-conversion radio
architecture and monolithic baseband filters for both
receiver and transmitter. It is specifically optimized for
802.11b (11Mbps CCK) and 22Mbps PBCC™ applica-
tions. The baseband filtering and Rx and Tx signal
paths support the CCK modulation scheme for BER =
10-5 at the required sensitivity levels.
The transceiver is suitable for the full range of 802.11b
data rates (1Mbps, 2Mbps, 5.5Mbps, and 11Mbps) as
well as the higher-rate 22Mbps PBCC standard. The
MAX2822 is available in the very small 7mm x 7mm 48-
lead QFN or thin QFN packages. The small solution size
makes it ideal for small form-factor 802.11b applications
such as PDAs, SmartPhones, and embedded modules.
Features
♦ 2.4GHz to 2.5GHz ISM Band Operation
♦ 802.11b (11Mbps CCK and 22Mbps PBCC) PHY
Compatible
♦ Integrated +17dBm PA
♦ Integrated PA Power Detector
♦ Integrated Transmit/Receive Switch
♦ Complete RF-to-Baseband Transceiver
Direct Up/Down Conversion
Monolithic Low-Phase-Noise VCO
Integrated Baseband Lowpass Filters
Integrated PLL with 3-Wire Serial Interface
Digital Bias Control for PA
Transmit Power Control
Receive Baseband AGC
Complete Baseband Interface
Digital Tx/Rx Mode Control
♦ -95dBm Rx Sensitivity at 1Mbps
♦ -85dBm Rx Sensitivity at 11Mbps
♦ Single +2.7V to +3.0V Supply
♦ 2µA Shutdown Mode
♦ Very Small 48-Pin QFN Package
Applications
802.11b PDAs and SmartPhones
802.11b Embedded Modules
802.11b PC Cards, Mini-PCI Cards
PART
MAX2822EGM
MAX2822ETM
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
48 QFN
48 Thin QFN
Pin Configuration/Functional Diagram appears at end of
data sheet.
PBCC is a trademark of Texas Instruments, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
2.4GHz 802.11b Zero-IF Transceiver
with Integrated PA and Tx/Rx Switch
AC ELECTRICAL CHARACTERISTICS—TRANSMIT MODE
(MAX2822 EV kit, characteristics relative to RFP/RFN: VCC = +2.7V to +3.0V, fRF and fLO = 2400MHz to 2499MHz, fOSC = 22MHz or
44MHz, transmit baseband input signal: 500mVP-P at 5.5MHz, VSHDNB = VRX_ON = VIL, VTX_ON = VIH, VCSB = VIH, VSCLK = VDIN =
VIL, VRF_GAIN = VIH, 0V ≤ VTX_AGC ≤ +2.0V, RBIAS = 12kΩ, ICP = +2mA, BWPLL = 45kHz, baseband inputs DC biased to +1.2V, reg-
isters set to default power-up settings, measurements taken within 1s of TXON rising edge, TA = +25°C, unless otherwise noted.
Typical values are for VCC = +2.7V, fLO = 2437MHz, fOSC = 22MHz, unless otherwise noted.) (Note 2)
PARAMETER
CONDITIONS
TRANSMIT SIGNAL PATH: BASEBAND INPUT TO RF OUTPUT
RF Output Frequency Range
LO Output Frequency Range
Tx RF Output Power
11Mbps CCK signal,
ACPR (adj) ≤ -30dBc,
ACPR (alt) ≤ -50dBc
(Note 4)
TA = +25°C
TA = -40°C to +85°C
MIN
2400
2400
+16.5
+15.5
Tx RF ACPR (Note 8)
In-Band Spurious Signals Relative to Carrier
Tx RF Harmonics
Tx RF Spurious Signal Emissions
(Outside 2400MHz to 2483.5MHz)
Nonharmonic Signals
Tx RF Output Noise
Tx RF Output Return Loss
Tx BASEBAND FILTER RESPONSE
-3dB Frequency
Attenuation Relative to Passband
Tx GAIN-CONTROL CHARACTERISTICS
Gain-Control Range
Gain-Control Slope
Gain-Control Response Time
Adjacent (adj):
-22MHz ≤ fOFFSET ≤ -11MHz,
11MHz ≤ fOFFSET ≤ 22MHz,
POUT = +16.5dBm
Alternate (alt):
-33MHz ≤ fOFFSET < -22MHz,
22MHz < fOFFSET ≤ 33MHz,
POUT = +16.5dBm
fRF = 2400MHz to
2483MHz
(Note 9)
11Mbps CCK at
+16.5dBm
< 2400MHz
Unwanted sideband
LO signal
Spurs > ±22MHz
2 × fRF
3 × fRF
2500MHz to 3350MHz
> 3350MHz
fOFFSET ≥ 22MHz, 0V ≤ VTX_GC ≤ +2.0V
100Ω balanced output impedance,
POUT = +17dBm
At 22MHz
At 44MHz
0V ≤ VTX_GC ≤ +2.0V
Peak gain slope
VTX_GC = +2.0V to 0V step, settled to within
±1dB
TYP
+17.5
-33
-56
-40
-30
-80
-45
-30
-50
-35
-40
-125
10
10
25
50
20
30
0.3
MAX UNITS
2499
2499
MHz
MHz
dBm
dBc
dBc
dBm
dBm
dBm/Hz
dB
MHz
dB
dB
dB/V
µs
_______________________________________________________________________________________ 5
5 Page 
2.4GHz 802.11b Zero-IF Transceiver
with Integrated PA and Tx/Rx Switch
Pin Configuration/Functional Diagram
48 47 46 45 44 43 42 41 40 39 38 37
VCC_LNA 1
VREF 2
PROGRAMMING AND
MODE CONTROL
36 SHDNB
35 VCC_RXF
RF_GAIN 3
VCC_REF 4
INPUT
MATCH
34 VCC_LO
33 VCC_VCO
GND 5
RFP 6
RFN 7
GND 8
T/R
SWITCH
PWR
DET
OUTPUT
MATCH
90
90
VCC_PA 9 PWR_DET
0
0
MAX2822
INTEGER-N
SYNTHESIZER
32 BYP
31 TUNE
30 GND_VCO
29 GND_CP
28 CP_OUT
VCC_DRVR 10
BIAS 11
TX_GC 12
∑ VOS COMP
SERIAL
INTERFACE
27 VCC_CP
26 CSB
25 SCLK
13 14 15 16 17 18 19 20 21 22 23 24
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet MAX2822.PDF ] | |
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