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Rainbow-electronics MAX7058 User Manual

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General Description
The MAX7058 UHF transmitter alternately transmits
ASK/OOK data at 315MHz or 390MHz using a single
crystal. The MAX7058 has internal tuning capacitors at
the output of the power amplifier that can be pro-
grammed for matching to the antenna or load. The
MAX7058 can transmit at a data rate up to 100kbps
NRZ (50kbps Manchester coded). Typical transmitted
power into a 50Ω load is +10dBm. The MAX7058 oper-
ates from +2.1V to +3.6V and draws under 8.0mA of
current. The standby current is less than 1µA at room
temperature. A 15MHz crystal is used as the reference
for 315MHz and 390MHz operation by selecting synthe-
sizer-divide ratios of 21 and 26, respectively.
The MAX7058 is available in a 4mm x 4mm, 24-pin thin
QFN package and is specified to operate in the -40°C
to +125°C automotive temperature range.
Applications
Garage Door Openers
RF Remote Controls
Home Automation
Wireless Sensors
Security Systems
Automotive
Features
♦ Switched 315MHz/390MHz Carrier Frequency
Using One Crystal
♦ +2.1V to +3.6V Single-Supply Operation
♦ ASK/OOK Modulation
♦ Internal Switched Capacitors for Optimum Dual-
Frequency Operation
♦ 8.0mA DC Current Drain (50% Duty Cycle OOK)
♦ 0.8µA Standby Current
♦ Small 4mm x 4mm, 24-Pin Thin QFN Package
MAX7058
315MHz/390MHz Dual-Frequency
ASK Transmitter
________________________________________________________________
Maxim Integrated Products
1
Pin Configuration
Ordering Information
5
6
4
3
14
13
15
CAP3
PAOUT
ROUT
N.C.
16
N.C.
N.C.
ENABLE
TOGGLE
N.C.
N.C.
78
CAP1
10 11 12
2324 22 20 19
CAP2
N.C.
XTAL2
AVDD
PAVDD
N.C.
MAX7058
CAP4
DIN
9
21
FSEL
2
17
XTAL1
DVDD
1
18
N.C.
N.C.
DIGITAL
CONTROL
FREQUENCY
÷21 OR ÷26
CRYSTAL
OSCILLATOR
CHARGE
PUMP
PFD
LOOP
FILTER
ENVELOPE
SHAPING
EXPOSED
PADDLE
(GND)
VCO
PA
MAX7058
1
2
3
4
78 910
TQFN
11 12
24 23 22 21 20 19
5
6
18
17
16
15
14
13
N.C.
FSEL
DVDD
CAP1
N.C.
N.C.
CAP3
CAP4
PAOUT
ROUT
N.C.
N.C.
N.C.
ENABLE
TOGGLE
N.C.
CAP2
N.C.
XTAL2
XTAL1
AVDD
N.C.
PAVDD
DIN
TOP VIEW
+
*EP = EXPOSED PADDLE.
EP*
Functional Block Diagram
19-3206; Rev 0; 1/08
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.
+
Denotes a lead-free package.
*
EP = Exposed paddle.
PART TEMP RANGE PIN-PACKAGE
PKG
CODE
MAX7058ATG+ - 40°C to + 125°C
24 Thi n QFN - E P *
( 4m m x 4m m )
T2444+3
Page view 0
1 2 3 4 5 6 ... 13 14

Summary of Contents

Page 1 - ASK Transmitter

General DescriptionThe MAX7058 UHF transmitter alternately transmitsASK/OOK data at 315MHz or 390MHz using a singlecrystal. The MAX7058 has internal t

Page 2

MAX7058When the particular capacitance control input pin ishigh, then the corresponding amount of capacitance isadded at PAOUT; this capacitance tunin

Page 3

Applications InformationOutput Matching to 50ΩΩWhen matched to a 50Ω system, the MAX7058’s PA iscapable of delivering +10dBm of output power at VDD= +

Page 4

MAX7058315MHz/390MHz Dual-Frequency ASK Transmitter12 ______________________________________________________________________________________Typical Op

Page 5

MAX7058315MHz/390MHz Dual-Frequency ASK Transmitter______________________________________________________________________________________ 13Package In

Page 6

MAX7058315MHz/390MHz Dual-Frequency ASK TransmitterMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied

Page 7

MAX7058315MHz/390MHz Dual-Frequency ASK Transmitter2 _______________________________________________________________________________________ABSOLUTE M

Page 8

MAX7058315MHz/390MHz Dual-Frequency ASK Transmitter_______________________________________________________________________________________ 3PARAMETER

Page 9

MAX7058315MHz/390MHz Dual-Frequency ASK Transmitter4 _______________________________________________________________________________________AC ELECTRI

Page 10

MAX7058315MHz/390MHz Dual-Frequency ASK Transmitter_______________________________________________________________________________________5SUPPLY CURR

Page 11

MAX7058315MHz/390MHz Dual-Frequency ASK Transmitter6 _______________________________________________________________________________________Typical Op

Page 12

MAX7058315MHz/390MHz Dual-Frequency ASK Transmitter_______________________________________________________________________________________7___________

Page 13

MAX7058Detailed DescriptionThe MAX7058 alternately transmits OOK/ASK data at315MHz or 390MHz using a single crystal. The devicehas integrated tuning c

Page 14

Operating ModeTOGGLE and FSEL are two pins available for control-ling the state of the toggle mode and the operating fre-quency. The following truth t

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