MAX2369 MAXIM [Maxim Integrated Products], MAX2369 Datasheet

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MAX2369

Manufacturer Part Number
MAX2369
Description
Complete Dual-Band Quadrature Transmitter
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX2369EGM
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX2369EGM+TD
Manufacturer:
MAXIM
Quantity:
9 440
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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MAX2369 Summary of contents

Page 1

... 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 packaged ...

Page 2

... 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. DC ELECTRICAL CHARACTERISTICS (MAX2369 Test Fixture BATT unless otherwise noted ...

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 filter, REF = CC = SHDN = CS = TXGATE = +2.75V, V 200mVp-p at 19.44MHz -7dBm 1017.26MHz 2061.26MHz, IFIN = 125mV ...

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 with passive lead-lag second-order loop filter, REF = CC = SHDN = CS = TXGATE = +2.75V, V 200mVp-p at 19.44MHz, V ...

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) OUTPUT POWER vs. VGC INPUT CELLULAR -10 -15 -20 -25 -30 -35 PCS -40 -45 -50 -55 -60 1.5 1.7 1.9 2.1 2.3 2.5 VGC (V) IF OUTPUT POWER vs. VGC INPUT ...

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 SPECTRUM 10 DESIRED 0 -10 IMAGE -20 LO -30 -40 -50 -60 -70 -80 -90 1500 1700 1900 2100 2300 2500 FREQUENCY (MHz) LOL PORT S11 ...

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

... VGC pin as the IF VGA to provide optimum lineari- ty and noise performance. The total power control range is >100dB. /2 and a CC The MAX2369 includes two power-amplifier (PA) drivers. RMS Each is optimized for the desired operating frequency. RFL is optimized for cellular-band operation. RFH is opti- mized for PCS operation. The PA drivers have open-col- lector outputs and require pullup inductors ...

Page 10

... IF VCO frequency = f REF where f is the external reference frequency. REF The operational control register (OPCTRL) controls the state of the MAX2369. See Table 3 each bit. The configuration register (CONFIG) sets the configura- tion for the IF PLL and the baseband I/Q input levels MSB ...

Page 11

... CTRL Figure 2. MAX2369 Typical Application Circuit ______________________________________________________________________________________ Complete Dual-Band Quadrature Transmitter The MAX2369 is designed for use in dual-band, triple- mode systems recommended for triple-mode hand- sets. A typical application circuit is shown in Signal Flow Control Figure 3 3-wire bus is SPI/QSPI/MICROWIRE compatible. FRAC-N PLL ...

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

... C -R INT n The MAX2369 EV kit can be used as a starting point for layout. For best performance, take into consideration power-supply issues, as well as the RF, LO, and IF lay- out. To minimize coupling between different sections of the IC, the ideal power-supply layout is a star configuration, ...

Page 16

... CC TXGATE 7 IFIN+ 8 IFIN- 9 N. BIAS For the latest package outline information www.maxim-ic.com/packages. Printed USA is a registered trademark of Maxim Integrated Products. Pin Configuration REF 36 N. N.C. N.C. 32 TANK + 31 MAX2369 30 TANK - IFLO SHDN QFN-EP Package Information ...

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