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MAX2395ETI+T

P1-P3P4-P6P7-P9P10-P12P13-P13
MAX2395
WCDMA Quasi-Direct Modulator
with VGA and PA Driver
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
General Description
The MAX2395 fully monolithic quasi-direct modulator IC
is designed for use in WCDMA/UMTS transmitters. The
quasi-direct modulation architecture reduces system
cost, component count, and board space compared to
transmitters using an IF SAW filter with IF VCO and IF
synthesizer blocks.
The MAX2395 includes I/Q baseband filters, an IF I/Q
modulator with VGA, a fully monolithic VCO with PLL,
an upconverter mixer, an RF VGA, and a power amplifi-
er (PA) driver. The use of the quasi-direct modulator
scheme ensures 5% (typ) EVM and a 30dB (min) carri-
er suppression. The RF VGA and IF VGA provide a
nominal 90dB of output power control. No external local
oscillators are required, enabling efficient implementa-
tion of variable duplex offset systems.
The PLL is programmed by loading data on the SPI™/
MICROWIRE™-compatible 3-wire serial bus. The IC
operates from a single +2.7V to +3.3V supply. The
devices are available in space-saving 28-pin QFN and
thin QFN exposed-pad packages (5mm x 5mm).
Applications
Features
o 5% EVM for P
OUT
= +6dBm
o 1920MHz to 1980MHz Operation
o +2.7V to +3.3V Single-Supply Operation
o +6dBm Output Power at 72mA
o 81dB Minimum Automatic Gain-Control (AGC)
Range
o Automatic I
CC
Throttle Back for Optimal Power
Consumption
o No IF SAW Filter Necessary
o On-Chip RF PLL, with Fully Monolithic VCO
o Ultra-Low External Component Count
SERIAL
BUS
LO
GEN
RF
INTEGER-N
PLL
28
+
27 26 25 24 23 22
8 9 10 11 12 13 14
15
16
17
18
19
20
21
7
6
5
4
3
2
1
POUT
V
CC_
PA
N.C.
BIAS_SET
VGC
V
CC_
IF
V
CC_
BB
SCLK
SDATA
CS
N.C.
N.C.
BVP
VTUNE
GND_VCO
V
CC_
VCO
RFCP
V
CC_
CP
V
CC_
PLL
REF
LD
N.C.
Q-
Q+
I-
I+
SHDN
IDLE
90°
0°
MAX2395
Pin Configuration/
Functional Diagram
Ordering Information
19-2970; Rev 3; 1/09
PART TEMP RANGE PIN-PACKAGE
MAX2395EGI -40°C to +85°C 28 QFN-EP*
MAX2395ETI -40°C to +85°C 28 TQFN-EP*
MAX2395ETI+ -40°C to +85°C 28 TQFN-EP*
SPI is a trademark of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
EVALUATION KIT
AVAILABLE
*
EP = Exposed pad.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
WCDMA Phones
UMTS/EDGE Phones
W-TDD Phones
MAX2395
WCDMA Quasi-Direct Modulator
with VGA and PA Driver
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
to GND...........................................................-0.3V to +3.6V
All Other Pins to GND..................................-0.3V to V
CC_
+ 0.3V
I_, Q_, REF to GND..............................................................1V
P-P
Digital Input Current .........................................................±10mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin QFN (derate 20.8mW/°C above +70°C) .........1667mW
28-Pin TQFN (derate 21.3mW/°C above +70°C) .......1702mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +3.3V, R
BIAS
= 12kΩ, T
A
= -40°C to +85°C. Typical values are at V
CC
= +2.85V and T
A
= +25°C, unless otherwise
noted.) (Notes 1, 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range 2.7 2.85 3.3 V
V
VGC
= 0.35V 46 60
P
OUT
= 0dBm 67 82
Operating Supply Current
P
OUT
= +6dBm 72 90
IDLE_PRG = 0 16 21
Idle Current IDLE = V
IL
IDLE_PRG = 1 19 27
mA
Shutdown Current SHDN = 0 0.5 10 µA
VGC Input Current -10 +10 µA
VGC Input Current During Shutdown SHDN = V
IL
1 µA
Gain-Control Voltage Range 0.35 2.20 V
Lock Indicator High—Leakage Current PLL locked, V
LD
= V
CC
4 µA
Lock Indicator Low—Sink Voltage PLL unlocked, sinking 100µA 0.4 V
SHDN Input Logic-High, V
DH
1.5 V
CC
V
SHDN Input Logic-Low 0 0.5 V
SHDN Input Resistance Resistance to ground 50 k
Digital Input Logic-High, V
IH
All digital input pins including IDLE, SDATA,
SCLK, and CS (Note 3)
0.7 x
V
DH
V
CC
V
Digital Input Logic-Low, V
IL
All digital input pins including IDLE, SDATA,
SCLK, and CS (Note 3)
0
0.3 x
V
DH
V
Digital Control Pin Input Current IDLE, SDATA, SCLK, and CS -10 +10 µA
I/Q Input Leakage Current -10 +10 µA
I/Q DC Common-Mode Voltage 1.35 1.45 1.65 V
CAUTION! ESD SENSITIVE DEVICE
MAX2395
WCDMA Quasi-Direct Modulator
with VGA and PA Driver
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
MAX2395 EV kit, V
CC
= +2.7V to +3.3V, R
BIAS
= 12kΩ,V
VGC
adjusted to obtain maximum rated output power, and T
A
= -40°C to
+85°C. I/Q inputs driven differentially with low- impedance source based on 3GPP UpLink reference measurement channel
(12.2kbps), envelope level 1V
P-P
. Typical values are at V
CC
= +2.85V and T
A
= +25°C, unless otherwise noted. See Tables 1 and 3 for
register settings.) (Note 2)
PARAMETER CONDITIONS MIN
TYP MAX
UNITS
CASCADED RF SPECIFICATIONS
RF Frequency Range
(Notes 4, 6)
1920 1950 1980
MHz
Maximum Output Power
(Note 6)
VGC set for maximum output power while meeting
ACPR1, ACPR2, out-of-band emissions, and output
noise density specifications
6
dBm
At f = 1575MHz -31 -24
Out-of-Band Emissions
(Note 6)
At RF + 2 x IF (image) -13
-8.5
dBc
P
OUT
> 0dBm and T
A
> 0°C
-48 -45
Adjacent Channel Power Ratio,
ACPR1 (Notes 5, 6)
∆∆f = ±5MHz/3.84MHz
BW
P
OUT
≤ 0dBm and T
A
≤ 0°C
-45 -43
dBc
Alternate Channel Power Ratio,
ACPR2 (Notes 5, 6)
∆∆f = ±10MHz/3.84MHz BW -60 -57 dBc
P
OU T
= + 6d Bm at 1920M H z, noi se m easur ed at 1880M H z -140 -137
Output Noise Power Density
(Note 6)
P
OU T
= + 6d Bm at 1980M H z, noi se m easur ed at 2110M H z -146 -143
dBc/Hz
Minimum Output Power V
VGC
= 0.35V -85 -78
dBm
Carrier Suppression 30 dB
Sideband Suppression 32 dB
Including BB filter, P
OUT
= +6dBm 5 7.5
EVM (Note 6)
Including BB filter, P
OUT
= -44dBm 8.6
14.6
%
RMS
I/Q MODULATION BASEBAND INPUTS
Passband Amplitude Ripple DC to 2MHz (Notes 6, 7) -0.3
+0.4
dB
At 8.08MHz 8 35
Baseband Selectivity Relative to passband
At 13.44MHz 25 50
dB
INTEGER-N RF PLL
Main PLL Integer Division Ratios
16-bit register (64/65 dual-modulus prescaler)
4032 9750 65,535
Reference Frequency Range 8
19.2
40
MHz
Input Frequency for Reference
Frequency Doubler
OPCTRL register bit 7 = 1 13 16
MHz
Reference-Divider Ratio 9-bit register 80
511
Locked, RCP1/RCP0 = 0 1, V
CC
/2
1200 1500 1800
Charge-Pump Nominal Currents
(Sink or Source)
Locked, RCP1/RCP0 = 1 1, V
CC
/2
2000 2500 3000
µA
Charge-Pump Leakage Current 20 nA
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX2395ETI+T

Mfr. #:
Buy MAX2395ETI+T
Manufacturer:
Maxim Integrated
Description:
Modulator / Demodulator WCDMA Quasi-Direct Modulator w/VGA
Lifecycle:
New from this manufacturer.
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