MAX7058 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – 315MHz/390MHz Dual-Frequency ASK Transmitter

19-3206; Rev 0; 1/08
EVAALVUAAILTAIOBNLEKIT
315MHz/390MHz Dual-Frequency
ASK Transmitter
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.
Garage Door Openers
RF Remote Controls
Home Automation
Wireless Sensors
Security Systems
Automotive
Applications
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
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
PKG
CODE
MAX7058ATG+ -40°C to +125°C
+Denotes a lead-free package.
*EP = Exposed paddle.
24 Thin QFN-EP*
(4mm x 4mm)
T2444+3
Pin Configuration
Functional Block Diagram
TOP VIEW
+ ^{24 23 22 21 20 19}
N.C. 1
18 N.C.
DVDD 2
17 XTAL1
FSEL 3
CAP1 4
MAX7058
16 XTAL2
15 AVDD
CAP2 5
EP*
N.C. 6
14 PAVDD
13 N.C.
7 8 9 10 11 12
*EP = EXPOSED PADDLE.
TQFN
24
23
22
21
20
19
N.C. 1
DVDD 2
FSEL 3
CAP1 4
CAP2 5
CRYSTAL
OSCILLATOR
FREQUENCY
÷21 OR ÷26
PFD
EXPOSED
DIGITAL PADDLE
CONTROL (GND)
VCO
CHARGE
PUMP
LOOP
FILTER
ENVELOPE
PA
SHAPING
18 N.C.
17 XTAL1
16 XTAL2
15 AVDD
14 PAVDD
N.C. 6
MAX7058 _{13 N.C.}
7
8
9
10
11
12
________________________________________________________________ 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.