MAX2511_97 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – Low-Voltage IF Transceiver with Limiter and RSSI

19-1209; Rev 0; 10/97
EVAALVUAAILTAIOBNLEKIT
Low-Voltage IF Transceiver
with Limiter and RSSI
_______________General Description
The MAX2511 is a complete, highly integrated IF trans-
ceiver for applications employing a dual-conversion
architecture. Alternatively, the MAX2511 can be used
as a single-conversion transceiver if the RF operating
frequency ranges from 200MHz to 440MHz.
In a typical application, the receiver downconverts a
high IF/RF (200MHz to 440MHz) to a 10.7MHz low IF
using an image-reject mixer. Functions include an
image-reject downconverter with 34dB of image sup-
pression followed by an IF buffer that can drive an off-
chip IF filter; an on-chip limiting amplifier offering 90dB
of monotonic received-signal-strength indication (RSSI);
and a robust limiter output driver. The transmit image-
reject mixer generates a clean output spectrum to mini-
mize filter requirements. It is followed by a 40dB
variable-gain amplifier that maintains IM3 levels below
-35dBc. Maximum output power is 2dBm. A VCO and
oscillator buffer for driving an external prescaler are
also included.
The MAX2511 operates from a 2.7V to 5.5V supply and
includes flexible power-management control. Supply
current is reduced to 0.1µA in shutdown mode.
For applications using in-phase (I) and quadrature (Q)
baseband architecture for the transmitter, Maxim offers
a corresponding transceiver product: the MAX2510.
The MAX2510 has features similar to those of the
MAX2511, but upconverts I/Q baseband signals using
a quadrature upconverter.
________________________Applications
PWT1900 Wireless Handsets and
Base Stations
PACS, PHS, DECT and Other PCS
Wireless Handsets and Base Stations
400MHz ISM Transceivers
IF Transceivers
Wireless Data Links
Typical Operating Circuit appears at end of data sheet.
____________________________Features
o Single +2.7V to +5.5V Supply
o Complete Receive Path:
200MHz to 440MHz (first IF) to
8MHz to 13MHz (second IF)
o Limiter with Differential Outputs (adjustable level)
o RSSI Function with 90dB Monotonic Dynamic
Range
o Complete Transmit Path:
8MHz to 13MHz (second IF) to
200MHz to 440MHz (first IF)
o On-Chip Oscillator with Voltage Regulator
and Buffer
o Advanced System Power Management
(four modes)
o 0.1µA Shutdown Supply Current
______________Ordering Information
PART
MAX2511EEI
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
28 QSOP
__________________Pin Configuration
TOP VIEW
LIMIN 1
CZ 2
CZ 3
RSSI 4
GC 5
TANK 6
GND 7
V_CC 8
TANK 9
GND 10
V_CC 11
OSCOUT 12
LIMOUT 13
LIMOUT 14
MAX2511
QSOP
28 VREF
27 MIXOUT
26 GND
25 RXIN
24 TXOUT
23 TXOUT
22 RXIN
21 V_CC
20 GND
19 V_CC
18 TXEN
17 RXEN
16 TXIN
15 TXIN
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