ATA5773-PXQW Atmel, ATA5773-PXQW Datasheet - Page 10

XMITTR UHF ASK/FSK 310MHZ 24VQFN

ATA5773-PXQW

Manufacturer Part Number
ATA5773-PXQW
Description
XMITTR UHF ASK/FSK 310MHZ 24VQFN
Manufacturer
Atmel
Datasheet

Specifications of ATA5773-PXQW

Frequency
310MHz ~ 350MHz
Modulation Or Protocol
UHF
Power - Output
8dBm
Voltage - Supply
2 V ~ 4 V
Current - Transmitting
9.8mA
Data Interface
PCB, Surface Mount
Memory Size
4kB Flash, 256B EEPROM, 256B SRAM
Antenna Connector
PCB, Surface Mount
Operating Temperature
-40°C ~ 85°C
Package / Case
24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN
Processor Series
ATA5x
Core
AVR8
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
4 KB
Data Ram Size
256 B
Interface Type
SPI, USI
Maximum Clock Frequency
4 MHz
Number Of Programmable I/os
12
Number Of Timers
2
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 12 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Applications
-
Sensitivity
-
Data Rate - Maximum
-
Current - Receiving
-
Lead Free Status / Rohs Status
 Details

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATA5773-PXQW
Manufacturer:
ATMEL
Quantity:
3 500
Part Number:
ATA5773-PXQW
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
10
Atmel ATA5771/73/74
The load impedance is defined as the impedance seen from the power amplifier (pin ANT1
and pin ANT2) into the matching network. This large signal load impedance should not be
mixed up with the small signal input impedance delivered as input characteristic of RF amplifi-
ers and measured from the application into the IC, instead of from the IC into the application.
Please take note that there must be a low resistive path between the V
put of the PA to deliver the DC current. Reduced output power will be achieved by lowering the
real parallel part of the load impedance where the parallel imaginary part should be kept
constant.
Output power measurement can be performed using the circuit shown in
the component values must be changed to compensate for the individual board parasitics until
the RF power amplifier has the right load impedance. In addition, the damping of the cable
used to measure the output power must be calibrated out.
Figure 3-2.
• Z
Load
– Background: The current pulse of the power amplifier is 7.7mA and the maximum
output power is delivered to a resistive load of 475 if the 0.53pF output
capacitance of the power amplifier is compensated by the load impedance. And
thus the load impedance of Z
is achieved for the maximum output power of 5.5dBm.
= (166 + j226) for the Atmel ATA5771 with the power efficiency of 24%
Output Power Measurement Atmel ATA5771/73/74
ANT1
ANT2
Z
Lopt
C
V
L
Load
1
S
1
= 1 nF
= 47 nH
C
2
= 475 || j/(2
= 3.3 pF
Z = 50
f
0.53 pF) = (166 + j226)
Power
meter
50
R
S
in
and the collector out-
Figure
3-2. Note that
9137E–RKE–12/10

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