Rainbow Electronics MAX7058 - Manual

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.
7 8
CAP1
10 11 12
23 24 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
7 8 9 10
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