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PDF ATA5783 Data sheet ( Hoja de datos )
| Número de pieza | ATA5783 | |
| Descripción | (ATA5781 - ATA5783) UHF ASK/FSK Receiver | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Atmel ATA5781/ATA5782/ATA5783
UHF ASK/FSK Receiver
SUMMARY DATASHEET
This is a summary document.
The complete document is
available under NDA. For more
information, please contact
your local Atmel sales office.
Features
● AVR microcontroller core with 1Kbyte SRAM and 24Kbyte RF library in firmware
(ROM)
● Atmel® ATA5781: 20Kbyte of user Flash
● Atmel ATA5782: 20Kbyte of user ROM
● Atmel ATA5783: No user memory — RF library in firmware only
● Supported frequency ranges
● Low-Band 310MHz to 318MHz, 418MHz to 477MHz
● High-Band 836MHz to 956MHz
● 315.00MHz/433.92MHz/868.30MHz and 915.00MHz with one 24.305MHz crystal
● Low current consumption
● 9.8mA for RXMode (Low-Band), 1.2mA for 21ms cycle three-channel polling
● Typical OFFMode current of 5nA (maximum 600nA at Vs = 3.6V and T = 85°C)
● Supports the 0dBm class of ARIB STD-T96
● Input 1dB compression point
● –48dBm (full sensitivity level)
● –20dBm (active antenna damping)
● Programmable channel frequency with fractional-N PLL
● 93Hz resolution for Low-Band
● 185Hz resolution for High-Band
● FSK deviation ±0.375kHz to ±93kHz
● FSK sensitivity (Manchester coded) at 433.92MHz
● –108.5dBm at 20Kbit/s f = ± 20kHz BWIF = 165kHz
● –111dBm at 10Kbit/s
f = ± 10kHz BWIF = 165kHz
● –114dBm at 5Kbit/s
f = ± 5kHz
BWIF = 165kHz
● –122.5dBm at 0.75Kbit/s f = ± 0.75kHz BWIF = 25kHz
● ASK sensitivity (Manchester coded) at 433.92MHz
● –110.5dBm at 20Kbit/s BWIF = 80kHz
● –125dBm at 0.5Kbit/s
BWIF = 25kHz
● Programmable Rx-IF bandwidth 25kHz to 366kHz (approximately 10% steps)
● Blocking (BWIF = 165kHz): 64dBc at frequency offset = 1MHz and 48dBc at 225kHz
● High image rejection: 55dB at 315MHz/433.92MHz and 47dB at 868.3MHz/915MHz
without calibration
9286BS–RKE–06/13
Free Datasheet http://www.datasheet4u.com/
1 page  
1.3 Pinning
Figure 1-2. Pin Diagram
RFIN_LB
RFIN_HB
32 31 30 29 28 27 26 25
1
exposed die pad
2
24 PB2
23 PB1
SPDT_RX 3
SPDT_ANT 4
NC 5
SPDT_RX2 6
Atmel
ATA5781
ATA5782
ATA5783
22 PB0
21 DGND
20 DVCC
19 PC5
NC 7
18 PC4
VS_SPDT 8
17 PC3
9 10 11 12 13 14 15 16
Note:
The exposed die pad is connected to the internal die.
Table 1-2. Pin Description
Pin No.
1
Pin Name
RFIN_LB
2 RFIN_HB
3 SPDT_RX
4 SPDT_ANT
5, 7 NC
6 SPDT_RX2
8 VS_SPDT
9 TEST_EN
10 XTAL1
11 XTAL2
12 AVCC
13 VS
14 PC0
Type
Analog
Analog
Analog
Analog
-
Analog
Analog
–
Analog
Analog
Analog
Analog
Digital
Description
LNA input for Low-Band frequency range (< 500MHz)
LNA input for High-Band frequency range (> 500MHz)
Rx switch output (damped signal output)
Antenna input (RXMode) of the SPDT switch
Open in application
RX switch output 2 (damped signal output)
SPDT supply
3V application supply voltage input
Test enable, connected to GND in application
Crystal oscillator pin 1 (input)
Crystal oscillator pin 2 (output)
RF front end supply regulator output
Main supply voltage input
Main
Alternate
: AVR Port C0
: PCINT8 / NRESET / DebugWIRE
Atmel ATA5781 [Summary DATASHEET]
9286BS–RKE–06/13
5
Free Datasheet http://www.datasheet4u.com/
5 Page 
The initial settings are stored in the EEPROM and copied during firmware initialization to the SRAM. This allows modification of
the PollingMode timing and service/channel configuration during IDLEMode.
The tune and check mode (TCMode) offers calibration and self-checking functionality for the VCO and FRC oscillators as well
as for temperature measurement, and polling cycle accuracy. This mode is activated via the SPI command “Calibrate and
Check”. When selected in the EEPROM settings, tune and check tasks are also used during system initialization after power-
on. Furthermore, they can also be activated periodically during PollingMode.
Table 2-1 shows the relations between the operating modes and their corresponding power supplies, clock sources, and sleep
mode settings.
Table 2-1. Operating Modes versus Power Supplies and Oscillators
Operation Mode
AVR Sleep Mode
DVCC AVCC XTO SRC FRC
OFFMode
-
off off off off off
IDLEMode(RC)
Active mode
Power-down(1)
off off on on
off off on off
IDLEMode(XTO)
Active mode
Power-down(1)
on on on off
on on on off
RXMode
PollingMode(RC)
- Active period
- Sleep period
Active mode
Active mode
Power-down(1)
on on on off
on
on on on on
off off on off
PollingMode(XTO)
- Active period
- Sleep period
Active mode
Power-down(1)
on on on off
on on on off
Notes: 1. During IDLEMode(RC) and IDLEMode(XTO) the AVR microcontroller enters sleep mode to reduce current con-
sumption. The sleep mode of the microcontroller section can be defined in the EEPROM. The power-down mode
is recommended for keeping current consumption low.
Atmel ATA5781 [Summary DATASHEET]
9286BS–RKE–06/13
11
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
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| PDF Descargar | [ Datasheet ATA5783.PDF ] | |
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