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MAX2370ETM-T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
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).
Applications
450MHz CDMA/WCDMA Phones
OFDM, cdma2000
®
, WCDMA, NMT
Wireless Data Links
Features
♦ 450MHz Operating Frequency
♦ +8dBm Output Power
-64dBc Typical ACPR at ±885kHz Offset
-66dBc Typical ACPR at ±1.125MHz Offset
♦ 100dB Power-Control Range
♦ Dual Synthesizer for RF and IF Local Oscillators
♦ SPI/QSPI/MICROWIRE-Compatible 3-Wire
Interface Bus
♦ Single-Sideband Upconverter
♦ Directly Drives External Power Amplifier
MAX2370
Complete 450MHz Quadrature Transmitter
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-0222; Rev 0; 5/05
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.
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
PIN-PACKAGE
PKG
CODE
MAX2370ETM
-40°C to +85°C
48 Thin QFN-EP*
(7mm x 7mm)
T4877-3
MAX2370ETM+
-40°C to +85°C
48 Thin QFN-EP*
(7mm x 7mm)
T4877+3
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.
*EP = Exposed paddle.
+Denotes lead-free package.
REF
N.C.
N.C.
N.C.
IFLO
V
CC
I+
I-
TANK+
TANK-
N.C.
LOCK
V
CCDRV
V
CC
IFIN+
IFIN-
RBIAS
N.C.
N.C.
N.C.
RFOUT
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
N.C.
IFOUT-
IFOUT+
V
CC
Q-
Q+
V
CC
N.C.
DI
CLK
N.C.
GND
GND
LO
N.C.
RFPLL
V
CCRFCP
RFCP
V
CC
V
CCIFCP
IFCP
GND
GC
48
47
46
45
44
43
42
41
40
39
38
37
13
14
15
16
17
18
19
20
21
22
23
24
CS
SHDN
IDLE
TXGATE
TOP VIEW
MAX2370
+45 -45
90°
0°
IF PLLRF PLL
Σ
Σ
SPI
INTERFACE
EP
/2
90°
0°
Pin Configuration/
Functional Diagram
MAX2370
Complete 450MHz Quadrature Transmitter
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
, RFOUT, V
CCIFCP
, V
CCRFCP
,
V
CCDRV
to GND.................................................-0.3V to +3.6V
DI, SCLK,
CS, GC, SHDN, TXGATE, IDLE,
LOCK to GND.........................................-0.3V to (V
CC
+ 0.3V)
AC Input Pins (IFIN_, Q_, I_, TANK_, REF,
RFPLL, LO) to GND.....................................................1V Peak
Digital Input Current (SHDN, TXGATE, IDLE,
SCLK, DI, CS) ...............................................................±10mA
Continuous Power Dissipation (T
A
= +70°C)
48-Pin Thin QFN (derate 38.5mW/°C above +70°C).....3077mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +3.3V, SHDN = IDLE = TXGATE = high, V
GC
= 2.5V, R
BIAS
= 10kΩ, registers set according to Table 1, f
REF
=
19.2MHz, no AC signals applied, T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.0V, T
A
= +25°C, unless otherwise noted.)
(Note 1)
PARAMETER CONDITIONS
MIN TYP MAX
Supply Voltage Range V
CC
2.7 3.3 V
V
GC
= 0.6V 53 79
V
GC
= 1.95V 57 87
P
RFOUT
= +5.5dBm, IFG[2:0] = 011 118
P
RFOUT
= +8dBm, IFG[2:0] = 011 134
Addition for IFLO buffer 3.4 7.7
IDLE = low 6 10
Operating Supply Current
TXGATE = low 5 7
mA
Sleep-Mode Supply Current SHDN = 0V 0.5 20 µA
Logic-High Voltage
0.7 x V
CC
V
Logic-Low Voltage
0.3 x V
CC
V
Logic Input Current -5 +5 µA
GC Input Current V
GC
= 0.5V to 2.5V 3.3 5 µA
GC Input Current During Shutdown SHDN = low, V
GC
= 2.5V 7 11 µA
Lock Indicator High Voltage (Locked) 47kΩ pullup load
V
CC
-
0.4V
V
Lock Indicator Low Voltage (Unlocked)
47kΩ pullup load 0.5 V
CAUTION! ESD SENSITIVE DEVICE
MAX2370
Complete 450MHz Quadrature Transmitter
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(MAX2370 EV kit, V
CC
= +2.7V to +3.3V, SHDN = IDLE = TXGATE = high, V
GC
= 2.5V, R
BIAS
= 10kΩ, 50Ω system, T
A
= -40°C to
+85°C. Typical values are at V
CC_
= SHDN = IDLE = TXGATE = CS = 3.0V, f
REF
= 19.2MHz, LO input power = -15dBm, f
LO
= 575MHz,
f
RFOUT
= 455MHz, f
IF
= 120MHz, registers set according to Table 1, input voltage at I and Q = 130mV
RMS
differential,
cascade specifications assume 400Ω IF filter with 5dB insertion loss, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS
MIN
TYP
MAX
UNITS
MODULATOR
IF Frequency Range
Typically meets 30dB sideband suppression over this
frequency range
95 to 195
MHz
I/Q Common-Mode Input Voltage
(Notes 2, 3)
1.35
V
CC
-
1.25
V
I/Q Input Current V
CM
= 1.4V 6 µA
+25°C < T
A
< +85°C7087
Gain-Control Range
V
GC
= 0.5V to 2.5V
T
A
= -40°C85
dB
Gain Variation Over Temperature
Relative to +25°C, T
A
= -40°C to +85°C -2.4, +3.4 dB
Carrier Suppression V
GC
= 2.5V 30 40 dB
Sideband Suppression V
GC
= 2.5V 30 40 dB
IF Output Noise at Rx Band
V
GC
set to give -12dBm IF output power, noise
measured at 10MHz offset (Note 4)
-138 -135
dBm/Hz
f
OFFSET
= ±885kHz in 30kHz BW -66
f
OFFSET
= ±1.125MHz in 30kHz BW
-69
f
OFFSET
= ±1.98MHz in 30kHz BW -84
IF Adjacent Channel Power Ratio
IS-95 Reverse Modulation
V
GC
set to give
-12dBm IF output
power, IFG[2:0] =
011
f
OFFSET
= ±4MHz in 30kHz BW -89
dBc
UPCONVERTER AND PREDRIVER
RFOUT Frequency Range
See the Typical Operating Characteristics for typical gain
vs. frequency
410 to 500
MHz
LO Frequency Range
Typically meets 30dB image suppression over this range
530 to 695
MHz
LO and RFPLL Input Power -15 -7 0
dBm
Conversion Gain 23 dB
MPL Gain Change MPL = 0, gain relative to MPL = 1
-3.4
dB
+25°C < T
A
< +85°C3044
RF Gain-Control Range
V
GC
= 0.5V to 2.5V
T
A
= -40°C46
dB
RF Image Suppression At maximum output power -20 dBc
Rx Band Noise Power
P
RFOUT
= +8dBm, noise measured at +10MHz offset
(Note 4)
-130 -128.5
dBm/Hz
CASCADED MODULATOR, UPCONVERTER, AND PREDRIVER
RFOUT Output Power Meets ACPR specifications (Note 4) 5.5 10
dBm
f
OFFSET
= ±885kHz in 30kHz BW -64 -57
f
OFFSET
= ±1.125MHz in 30kHz BW
-66 -61
f
OFFSET
= ±1.98MHz in 30kHz BW -82 -78
P
OU T
= + 8d Bm ,
IFG[2:0] = 011
f
OFFSET
= ±4MHz in 30kHz BW -86 -78
f
OFFSET
= ±885kHz in 30kHz BW -64 -58
f
OFFSET
= ±1.125MHz in 30kHz BW
-67 -62
f
OFFSET
= ±1.98MHz in 30kHz BW -81 -78
Ad j acent C hannel P ow er Rati o
IS - 95 Rever se M od ul ati on ( N ote 4)
P
OUT
= +5.5dBm,
IFG[2:0] = 011
f
OFFSET
= ±4MHz in 30kHz BW -86 -85
dBc
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

MAX2370ETM-T

Mfr. #:
Buy MAX2370ETM-T
Manufacturer:
Maxim Integrated
Description:
RF TX IC CDMA2000 450MHZ 48WFQFN
Lifecycle:
New from this manufacturer.
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