MAX2369EGM+TD Maxim Integrated Products, MAX2369EGM+TD Datasheet

RF Transmitter Complete Dual-Band Q uadrature Transmitte

MAX2369EGM+TD

Manufacturer Part Number
MAX2369EGM+TD
Description
RF Transmitter Complete Dual-Band Q uadrature Transmitte
Manufacturer
Maxim Integrated Products
Type
Complete Dual-Band Quadrature Transmitterr
Datasheet

Specifications of MAX2369EGM+TD

Package / Case
QFN-48
Operating Frequency
120 MHz to 235 MHz
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Noise Figure
- 145 dBm/Hz
Operating Supply Voltage
2.7 V to 3 V
Supply Current
80 mA to 155 mA
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.7 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX2369 is a dual-band, triple-mode complete
transmitter for cellular phones. The device takes a differ-
ential I/Q baseband input and mixes it up to IF through a
quadrature modulator and IF variable-gain amplifier
(VGA). The signal is then routed to an external bandpass
filter and upconverted to RF through an SSB mixer and
RF VGA. The signal is further amplified with an on-board
PA driver.
The MAX2369 is designed for dual-band operation and
supports TDMA for the PCS band as well as TDMA and
AMPS for the cellular band. The desired mode of
operation is selected by loading data on the SPI™/
MICROWIRE™-compatible 3-wire serial bus. The
MAX2369 then routes the signals to the appropriate ports
depending on which band is selected. The MAX2369
includes two RF LO input ports and two PA driver ports,
eliminating the need for external switching circuitry.
The MAX2369 takes advantage of the serial bus to set
modes such as charge-pump current, high or low side-
band injection, and IF/RF gain balancing. It is packaged
in a small (7mm
exposed paddle.
Pin Configuration appears at end of data sheet.
Selector Guide appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
19-1924; Rev 1; 10/01
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Dual-Band TDMA/Amps Handsets
GAIT Handsets
Triple-Mode, Dual-Mode, or Single-Mode
Mobile Phones
Satellite Phones
Wireless Data Links (WAN/LAN)
Wireless Local Area Networks (LANs)
High-Speed Data Modems
High-Speed Digital Cordless Phones
Wireless Local Loop (WLL)
________________________________________________________________ Maxim Integrated Products
7mm) 48-pin QFN package with
General Description
Applications
Quadrature Transmitter
o Dual-Band, Triple-Mode Operation
o +7dBm Output Power with -34dBc ACPR
o 100dB Power Control Range
o Supply Current Drops as Output Power Is Reduced
o On-Chip IF VCO and IF PLL
o QSPI/SPI/MICROWIRE-Compatible 3-Wire Bus
o Digitally Controlled Operational Modes
o +2.7V to +5.5V Operation
o Single Sideband Upconverter Eliminates SAW
o Power Control Distributed at IF and RF for
*Exposed paddle
TXGATE
MAX2369EGM
(NADC Modulation)
Filters
Optimum Dynamic Range
LOCK
R
IFIN+
IFIN-
N.C.
N.C.
RFH
V
V
V
BIAS
RFL
CC
CC
CC
Complete Dual-Band
PART
10
11
12
1
2
3
4
5
6
7
8
9
+45
90
Σ
TEMP. RANGE
-40°C to +85°C
0
Ordering Information
-45
Functional Diagram
MAX2369
Σ
0
90
/2
IFPLL
/2
PIN-PACKAGE
48 QFN-EP*
Features
36
35
34
33
32
31
30
29
28
27
26
25
REF
N.C.
N.C.
N.C.
N.C.
TANK+
TANK-
IFLO
V
SHDN
I-
I+
CC
1

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MAX2369EGM+TD Summary of contents

Page 1

... Selector Guide appears at end of data sheet. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Complete Dual-Band ...

Page 2

Complete Dual-Band Quadrature Transmitter ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................-0.3V to +3.6V CC RFL, RFH.............................................................................+5.5V DI, CLK, CS, VGC, SHDN, TXGATE, LOCK.....................................................-0. Input Pins (IFIN TANK, REF, LOL, LOH) ...............................................................1.0V peak Digital Input Current ...

Page 3

AC ELECTRICAL CHARACTERISTICS (MAX2369 Evaluation Kit: 50Ω system, operating modes as defined in Table 6, input voltage at I and Q = 200mV common mode = V /2, 300kHz quadrature CW tones, IF synthesizer locked with passive lead-lag second-order loop ...

Page 4

Complete Dual-Band Quadrature Transmitter AC ELECTRICAL CHARACTERISTICS (continued) (MAX2369 Evaluation Kit: 50Ω system, operating modes as defined in Table 6, input voltage at I and Q = 200mV common mode = V /2, 300kHz quadrature CW tones, IF synthesizer locked ...

Page 5

V = +2.8V BAT IF P SETTLING TIME 181.26MHz -10 0 100 200 300 400 500 600 700 800 900 1000 TIME (µs) ...

Page 6

Complete Dual-Band Quadrature Transmitter (MAX2369EVKIT +2.8V 3.0V BAT I/Q BASEBAND FREQUENCY RESPONSE 0 -0.5 -1.0 -1.5 -2.0 -2.5 -3 FREQUENCY (MHz) RFH OUTPUT ...

Page 7

PIN NAME Transmitter RF Output for Cellular Band (800MHz to 1000MHz)—for both FM and digital modes. 1 RFL This open-collector output requires a pullup inductor to the supply voltage, which is part of the output matching network and may be ...

Page 8

Complete Dual-Band Quadrature Transmitter PIN NAME Supply for the I/Q Modulator. Bypass with capacitor as close to the pin as possible. The bypass capacitor must not share its ground vias with any other branches. Differential Q-Channel Baseband ...

Page 9

Detailed Description The MAX2369 complete quadrature transmitter accepts differential I/Q baseband inputs with external common- mode bias. A modulator upconverts this to IF frequency in the 120MHz to 235MHz range. A gain control voltage pin (VGC) controls the gain of ...

Page 10

Complete Dual-Band Quadrature Transmitter The IFM register sets the main frequency divide ratio for the IF PLL. The IFR register sets the reference fre- quency divide ratio. The IF VCO frequency can be determined by the following: IF VCO frequency ...

Page 11

SHDN pin is low it shuts down everything. In either case, PLL programming and register information is lost. To retain the register information, use standby mode (STBY = 0). Table 6 shows an example of key registers for ...

Page 12

Complete Dual-Band Quadrature Transmitter Table 3. Operation Control Register (OPCTRL) BIT POWER-UP BIT NAME LOCATION STATE (0 = LSB) LO_SEL 1 15 UNUSED 0 14 ICP_MAX 0 13 MODE 01 12, 11 UNUSED 0 10 UNUSED 0 IFG 100 8, ...

Page 13

Table 4. Configuration Register (CONFIG) POWER-UP BIT NAME LOCATION STATE (0 = LSB) IF_PLL_SHDN 1 UNUSED 1 UNUSED 0 IQ_LEVEL 1 BUF_DIV 0 VCO_BYPASS 0 ICP 00 UNUSED 00 IF_PD_POL 1 UNUSED 111 UNUSED 1 LD_MODE 1 ...

Page 14

Complete Dual-Band Quadrature Transmitter Table 5. Power-Down Modes POWER-DOWN MODES SHDN pin Ultra-low shutdown current TXGATE pin For punctured TX mode IF PLL SHDN For external IF PLL use TX STBY TX is off, but IF LO stays locked REG ...

Page 15

B19 (MSB) DI CLK t CS NOTE: THE 3-WIRE BUS IS SPI/QSPI/MICROWIRE-COMPATIBLE. Figure 3. 3-Wire Interface Diagram CENT PAR Figure 4. Tank Port Oscillator The IF VCO tank (TANK+, ...

Page 16

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products ...

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