MAX2370 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – Complete 450MHz Quadrature Transmitter

19-0222; Rev 0; 5/05
EVAALVUAAILTAIOBNLEKIT
Complete 450MHz Quadrature Transmitter
General Description
The MAX2370 integrated quadrature transmitter is
designed for 450MHz applications. The device takes a
differential I/Q baseband input and converts it up to
intermediate frequency (IF) through a quadrature modu-
lator and IF variable-gain amplifier (VGA). The signal is
then routed to an external IF filter and upconverted to RF
through an image-reject mixer and RF VGA. The signal
is further amplified with an on-chip power amplifier (PA)
driver. An IF synthesizer, an RF synthesizer, a local
oscillator buffer, and an SPI™/QSPI™/MICROWIRE™-
compatible, 3-wire programmable bus complete the
basic functional blocks of this IC.
The MAX2370 is available in a 48-pin TQFN package
with exposed paddle and is specified for the extended
temperature range (-40°C to +85°C).
Features
o 450MHz Operating Frequency
o +8dBm Output Power
-64dBc Typical ACPR at ±885kHz Offset
-66dBc Typical ACPR at ±1.125MHz Offset
o 100dB Power-Control Range
o Dual Synthesizer for RF and IF Local Oscillators
o SPI/QSPI/MICROWIRE-Compatible 3-Wire
Interface Bus
o Single-Sideband Upconverter
o Directly Drives External Power Amplifier
Applications
450MHz CDMA/WCDMA Phones
OFDM, cdma2000^®, WCDMA, NMT
Wireless Data Links
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
PKG
CODE
MAX2370ETM -40°C to +85°C ^{48 Thin QFN-EP*} T4877-3
(7mm x 7mm)
MAX2370ETM+ -40°C to +85°C ^{48 Thin QFN-EP*} T4877+3
(7mm x 7mm)
*EP = Exposed paddle.
+Denotes lead-free package.
Pin Configuration/
Functional Diagram
TOP VIEW
RFOUT 1
N.C. 2
LOCK 3
V_CCDRV 4
IDLE 5
V_CC 6
TXGATE 7
IFIN+ 8
IFIN- 9
N.C. 10
N.C. 11
RBIAS 12
Σ
0°
90°
+45
-45
SPI
INTERFACE
RF PLL IF PLL
MAX2370
EP
Σ
0°
90°
/2
36 REF
35 N.C.
34 N.C.
33 N.C.
32 N.C.
31 TANK+
30 TANK-
29 IFLO
28 V_CC
27 SHDN
26 I-
25 I+
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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.