MAX2411A Datasheet, PDF (1/14 Pages) Maxim Integrated Products – Low-Cost RF Up/Downconverter with LNA and PA Driver

19-1324; Rev 1; 2/98
EVAALVUAAILTAIOBNLEKIT
Low-Cost RF Up/Downconverter
with LNA and PA Driver
________________General Description
The MAX2411A performs the RF front-end transmit/
receive function in time-division-duplex (TDD) communi-
cation systems. It operates over a wide frequency range
and is optimized for RF frequencies around 1.9GHz.
Applications include most popular cordless and PCS
standards. The MAX2411A includes a low-noise amplifier
(LNA), a downconverter mixer, a local-oscillator buffer, an
upconverter mixer, and a variable-gain power-amplifier
(PA) driver in a low-cost, plastic surface-mount package.
The MAX2411A’s unique bidirectional, differential IF port
reduces cost and component count by allowing the trans-
mit and receive paths to share the same IF filter.
The LNA has a 2.4dB typical noise figure and a -10dBm
input third-order intercept point (IP3). The downconvert-
er mixer has a low 9.2dB noise figure and 4dBm input
IP3. Image and local-oscillator filtering are implemented
off-chip for maximum flexibility. The PA driver amplifier
has 15dB of gain, which can be reduced over a 35dB
range. Power consumption is only 60mW in receive
mode and 90mW in transmit mode and drops to less
than 3µW in shutdown mode.
For applications requiring separate, single-ended IF
input and output ports, refer to the MAX2410 data
sheet. For applications requiring only a receive func-
tion, Maxim offers a low-cost downconverter with LNA
(see the MAX2406 data sheet).
________________________Applications
PWT1900
DECT
DCS1800/PCS1900
ISM-Band Transceivers
PHS/PACS
Iridium Handsets
Typical Operating Circuit appears on last page.
Functional Diagram
LNAOUT
RXMXIN
LNAIN
LNA
RX MIXER
IF
RXEN
POWER
IF
TXEN
MANAGEMENT _MAX2411A
LO
LO
PADROUT
PA DRIVER
TX MIXER
GC PADRIN
TXMXOUT
____________________________Features
o Low-Cost Silicon Bipolar Design
o Integrated Upconvert/Downconvert Function
o Operates from a Single +2.7V to +5.5V Supply
o 3.2dB Combined Receiver Noise Figure:
2.4dB (LNA)
9.2dB (mixer)
o Flexible Power-Amplifier Driver:
18dBm Output Third-Order Intercept (OIP3)
35dB Gain-Control Range
o LO Buffer for Low LO Drive Level
o Low Power Consumption:
60mW Receive
90mW Full-Power Transmit
o 0.3µW Shutdown Mode
o Flexible Power-Down Modes Compatible with
MAX2510/MAX2511 IF Transceivers
_______________Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX2411AEEI
-40°C to +85°C 28 QSOP
MAX2411AE/D -40°C to +85°C Dice*
*Dice are specified at T_A = 25°C, DC parameters only.
Pin Configuration
TOP VIEW
GND 1
LNAIN 2
GND 3
GND 4
V_CC 5
RXEN 6
LO 7
LO 8
TXEN 9
V_CC 10
GC 11
GND 12
PADROUT 13
GND 14
MAX2411A
QSOP
28 GND
27 LNAOUT
26 GND
25 GND
24 RXMXIN
23 GND
22 IF
21 IF
20 GND
19 TXMXOUT
18 GND
17 GND
16 PADRIN
15 GND
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