MAX7044AKA+T Maxim Integrated Products, MAX7044AKA+T Datasheet - Page 6

• Manufacturer Part Number: MAX7044AKA+T
• Description: RF Transmitter IC TRANSMITTER ASK -Power, High Efficie
• Manufacturer: Maxim Integrated Products
• Type: Transmitterr

Specifications of MAX7044AKA+T

• Operating Frequency: 450 MHz
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 2.5 V, 3.3 V
• Package / Case: SOT-23-8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

300MHz to 450MHz High-Efficiency,
Crystal-Based +13dBm ASK Transmitter
6
( Typical Application Circuit , V
XTAL1
XTAL2
DATA
_______________________________________________________________________________________
PIN
1
2
3
4
5
6
7
8
LOCK DETECT
DETECTOR
ACTIVITY
DATA
CLKOUT
PAGND
PAOUT
NAME
XTAL1
XTAL2
DATA
GND
V
DD
OSCILLATOR
CRYSTAL-
32x PLL
DRIVER
Functional Diagram
1st Crystal Input. f
Ground. Connect to system ground.
Ground for the Power Amplifier (PA). Connect to system ground.
Power-Amplifier Output. The PA output requires a pullup inductor to the supply voltage, which can be
part of the output-matching network to an antenna.
Buffered Clock Output. The frequency of CLKOUT is f
OOK Data Input. DATA also controls the power-up state (see the Shutdown Mode section).
Supply Voltage. Bypass to GND with a 100nF capacitor as close to the pin as possible.
2nd Crystal Input. f
DD
= +2.7V, T
PA
/16
MAX7044
A
= +25°C, unless otherwise noted.) (Note 1)
XTAL
XTAL
Typical Operating Characteristics (continued)
-40
-43
-46
-49
-52
-55
= f
= f
2.1
RF
f
RF
RF
V
GND
PAOUT
PAGND
CLKOUT
= 315MHz
/32.
DD
/32.
CLKOUT SPUR MAGNITUDE
2.4
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
2.7
The MAX7044 is a highly integrated ASK transmitter
operating over the 300MHz to 450MHz frequency
band. The IC requires only a few external components
to complete a transmit solution. The MAX7044 includes
a complete PLL and a highly efficient power amplifier.
The device is automatically placed into a low-power
shutdown mode and powers up when data is detected
on the data input.
The MAX7044 has an automatic shutdown mode that
places the device in low-power mode if the DATA input
has not toggled for a specific amount of time (wait time).
The wait time is equal to 2
This equates to a wait time of approximately 6.66ms for
a 315MHz RF frequency and 4.84ms for a 433MHz RF
3.0
FUNCTION
3.3
XTAL
3.6
/16.
Detailed Description
16
clock cycles of the crystal.
Pin Description
Shutdown Mode