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MAX2820A fiches techniques PDF

Maxim Integrated - 2.4GHz 802.11b Zero-IF Transceivers

Numéro de référence MAX2820A
Description 2.4GHz 802.11b Zero-IF Transceivers
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX2820A fiche technique
19-2493; Rev 5; 5/05
2.4GHz 802.11b Zero-IF Transceivers
General Description
The MAX2820/MAX2820A and MAX2821/MAX2821A
single-chip zero-IF transceivers are designed for the
802.11b (11Mbps) applications operating in the
2.4GHz to 2.5GHz ISM band. The transceivers are
nearly identical, except the MAX2821 and MAX2821A
also provide a low-power shutdown mode and an ana-
log voltage reference output. The MAX2820A/
MAX2821A are cost-reduced versions, virtually identi-
cal in pinout and performance to the MAX2820/
MAX2821. The transceivers include all the circuitry
required to implement an 802.11b RF-to-baseband
transceiver solution, providing a fully integrated
receive path, transmit path, VCO, frequency synthesis,
and baseband/control interface. Only a PA, RF switch,
RF BPF, and a small number of passive components are
needed to form the complete radio front-end solution.
The ICs eliminate the need for external IF and base-
band filters by utilizing a direct-conversion radio archi-
tecture and monolithic baseband filters for both
receiver and transmitter. They are specifically opti-
mized for 802.11b (11Mbps CCK) applications. The
baseband filtering and Rx and Tx signal paths support
the CCK modulation scheme for BER = 10-5 at the
required sensitivity levels.
The devices are suitable for the full range of 802.11b
data rates (1Mbps, 2Mbps, 5.5Mbps, and 11Mbps) and
also the higher-rate 22Mbps PBCCTM standard. The
MAX2820 and MAX2821 are available in a 7mm × 7mm
48-lead QFN package. The MAX2820, MAX2821,
MAX2820A, and MAX2821A are available in a 48-lead
thin QFN package.
Applications
802.11b 11Mbps WLAN
802.11b+ 22Mbps PBCC High-Data-Rate WLAN
802.11a + b Dual-Band WLAN
2.4GHz ISM Band Radios
Features
o 2.4GHz to 2.5GHz ISM Band Operation
o 802.11b (11Mbps CCK and 22Mbps PBCC) PHY
Compatible
o Complete RF-to-Baseband Transceiver
Direct-Conversion Upconverters and
Downconverters
Monolithic Low-Phase-Noise VCO
Integrated Baseband Lowpass Filters
Integrated PLL with 3-Wire Serial Interface
Digital Bias Control for External PA
Transmit Power Control (Range > 25dB)
Receive Baseband AGC (Range > 65dB)
Complete Baseband Interface
Digital Tx/Rx Mode Control
Analog Receive Level Detection
o -97dBm Rx Sensitivity at 1Mbps
o -87dBm Rx Sensitivity at 11Mbps
o +2dBm Transmit Power (11Mbps CCK)
o Single +2.7V to +3.6V Supply
o Low-Current Shutdown Mode (MAX2821 only)
o Very Small 48-Pin QFN Package(s)
Ordering Information
PART
MAX2820ETM-TD
MAX2820ETM+TD
MAX2820AETM-TD
MAX2820AETM+TD
MAX2821ETM-TD
MAX2821ETM+TD
MAX2821AETM-TD
MAX2821AETM+TD
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
48 Thin QFN
Lead Free
48 Thin QFN
Lead Free
48 Thin QFN
Lead Free
48 Thin QFN
Lead Free
PBCC is a trademark of Texas Instruments, Inc.
Pin Configuration/Functional Diagram and Typical
Application Circuit appear at end of data sheet.
________________________________________________________________ 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.

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