MAX1479ATE+ Maxim Integrated Products, MAX1479ATE+ Datasheet

RF Transmitter IC TRANSMITTER ASK/FSK

MAX1479ATE+

Manufacturer Part Number
MAX1479ATE+
Description
RF Transmitter IC TRANSMITTER ASK/FSK
Manufacturer
Maxim Integrated Products
Type
Transmitterr
Datasheet

Specifications of MAX1479ATE+

Operating Frequency
450 MHz
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Operating Supply Voltage
2.5 V, 3.3 V
Supply Current
2.9 mA to 18.1 mA
Supply Voltage (max)
3.6 V
Supply Voltage (min)
2.1 V
Package / Case
TQFN-16 EP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1479 crystal-referenced phase-locked-loop
(PLL) VHF/UHF transmitter is designed to transmit ASK,
OOK, and FSK data in the 300MHz to 450MHz frequency
range. The MAX1479 supports data rates up to 100kbps
in ASK mode and 20kbps in FSK mode (both
Manchester coded). The device provides an adjustable
output power of more than +10dBm into a 50Ω load. The
crystal-based architecture of the MAX1479 eliminates
many of the common problems of SAW-based transmit-
ters by providing greater modulation depth, faster fre-
quency settling, higher tolerance of the transmit
frequency, and reduced temperature dependence.
These improvements enable better overall receiver per-
formance when using the MAX1479 together with a
superheterodyne receiver such as the MAX1470,
MAX1471, MAX1473, or MAX7033.
The MAX1479 is available in a 16-pin TQFN package
(3mm x 3mm) and is specified for the automotive tem-
perature range from -40°C to +125°C.
19-3353; Rev 1; 6/09
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.
ENABLE
Remote Keyless Entry
Tire Pressure Monitoring
Security Systems
Radio-Controlled Toys
Wireless Game Consoles
Wireless Computer Peripherals
Wireless Sensors
RF Remote Controls
Garage Door Openers
MODE
V
DIN
Crystal-Based +10dBm ASK/FSK Transmitter
DD
1
2
3
4
ASK
FSK
16
DIVIDER
5
CLOCK
________________________________________________________________ Maxim Integrated Products
General Description
15
ENVELOPE
6
Functional Diagram
SHAPING
CRYSTAL
DRIVER
MAX1479
PD/CP
DIVIDE
BY 32
14
7
FILTER
LOOP
DEVIATION
VCO
Applications
PA
13
8
300MHz to 450MHz Low-Power,
12
11
10
9
DEV1
DEV0
CLK1
CLK0
o ETSI-Compliant EN300 220
o +2.1V to +3.6V Single-Supply Operation
o Supports ASK, OOK, and FSK Modulations
o Adjustable FSK Shift
o +10dBm Output Power into 50Ω Load
o Low Supply Current (6.7mA in ASK Mode,
o Uses Small Low-Cost Crystal
o Small 16-Pin TQFN Package
o Fast-On Oscillator—200µs Startup Time
o Programmable Clock Output
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
Typical Application Circuit appears at end of data sheet.
MAX1479ATE+
and 10.5mA in FSK Mode)
TOP VIEW
PART
*CONNECT EP TO GND.
ENABLE
MODE
V
DIN
DD
1
2
3
4
-40°C to +125°C
TEMP RANGE
16
Ordering Information
(3mm x 3mm)
5
EP*
MAX1479
TQFN
15
6
Pin Configuration
14
7
13
8
12
11
10
9
PIN-PACKAGE
16 TQFN-EP*
DEV1
DEV0
CLK1
CLK0
Features
1

Related parts for MAX1479ATE+

MAX1479ATE+ Summary of contents

Page 1

... FSK Mode) o Uses Small Low-Cost Crystal o Small 16-Pin TQFN Package o Fast-On Oscillator—200µs Startup Time o Programmable Clock Output Applications PART MAX1479ATE+ + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. Typical Application Circuit appears at end of data sheet. TOP VIEW 13 12 DEV1 ...

Page 2

Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.3V to +4V DD All Other Pins to GND ................................-0. Continuous Power Dissipation (T = +70°C) A 16-Pin TQFN (derate 14.7mW/°C above +70°C).........1176.5mW Stresses ...

Page 3

Crystal-Based +10dBm ASK/FSK Transmitter AC ELECTRICAL CHARACTERISTICS ( Typical Application Circuit , all RF inputs and outputs are referenced to 50Ω, V +125°C, unless otherwise noted. Typical values are at V PARAMETER SYMBOL SYSTEM PERFORMANCE Frequency Range Turn-On Time (Note ...

Page 4

Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter ( Typical Application Circuit , V = +2.7V SUPPLY CURRENT vs. SUPPLY VOLTAGE 315MHz -40° +25°C ...

Page 5

Crystal-Based +10dBm ASK/FSK Transmitter ( Typical Application Circuit , V = +2.7V OUTPUT POWER vs. SUPPLY VOLTAGE 315MHz -40° +25° +85°C ...

Page 6

Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter PIN NAME 1 V Supply Voltage. Bypass to GND with a 10nF and 220pF capacitor as close to the pin as possible. DD Mode Select. A logic low on MODE enables the ...

Page 7

Crystal-Based +10dBm ASK/FSK Transmitter The MAX1479 has a dedicated digital output pin for the frequency-divided crystal clock signal. This used as the time base for a microprocessor. The fre- quency-division ratio is programmable through two dig- ital ...

Page 8

Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter Output Matching to PCB Loop Antenna In most applications, the MAX1479 power-amplifier out- put has to be impedance matched to a small-loop antenna. The antenna is usually fabricated out of a cop- ...

Page 9

Crystal-Based +10dBm ASK/FSK Transmitter C10 C11 MODE MODE-SELECT INPUT DIN DATA INPUT ENABLE ENABLE INPUT CLOCK OUTPUT Chip Information PROCESS: CMOS _______________________________________________________________________________________ 300MHz to 450MHz Low-Power, C15 C14 CRYSTAL 1 DEVIATION DRIVER LOOP ...

Page 10

... 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. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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