ATA5722_技术文档

Features

• High FSK Sensitivity: –105.5 dBm at 20 Kbits/s, –109 dBm at 2.4 Kbits/s (433.92 MHz)

• High ASK Sensitivity: –111.5 dBm at 10 Kbits/s, –116 dBm at 2.4 Kbits/s (100% ASK

Carrier Level, 433.92 MHz)

• Low Supply Current: 10.5 mA in RX Mode

• Data Rate 1 to 20 Kbits/s Manchester FSK, 1 to 10 Kbits/s Manchester ASK

• ASK/FSK Receiver Uses a Low IF Architecture with High Selectivity, Blocking, and Low

Intermodulation (Typical 3-dB Blocking 55.5 dBC at ±750 kHz/60.5 dBC at ±1.5 MHz and

67 dBC at ±10 MHz, System I1dBCP = –30 dBm/System IIP3 = –20 dBm)

• Wide Bandwidth AGC to Handle Large Outband Blockers above the System I1dBCP

• 226-kHz IF (Intermediate Frequency) with 30-dB Image Rejection and 220-kHz System

Bandwidth to Support TPM Transmitters using ATA5756/ATA5757 Transmitters with

Standard Crystals

UHF ASK/FSK

Receiver

• XTAL Tolerances Compensated by Fractional-N Synthesizer with 800 Hz RF Resolution

• Single-ended RF Input

• RSSI (Received Signal Strength Indicator)

• Communication to Microcontroller with SPI Interface Working at 500 Kbits/s Maximum

• Configurable Self Polling and RX/TX Protocol Handling with FIFO-RAM Buffering of

Received Data

ATA5721

ATA5722

• 1 Push Button Input and 1 Wake-up Input are Active in Power-down Mode

• Integrated XTAL Capacitors

• Low In-band Sensitivity Change of Typically ±2.0 dB within ±75-kHz Center Frequency

Change in the Complete Temperature and Supply Voltage Range

• Fully Integrated PLL with Low-phase-noise VCO, PLL Loop Filter and Full Support of

Multi-channel Operation with Arbitrary Channel Distance due to Fractional-N

Synthesizer

• Sophisticated Threshold Control and Quasi-peak Detector Circuit in the Data Slicer

• 315 MHz and 433.92 MHz without External VCO and PLL Components

• Efficient XTO Start-up Circuit (> –1.5-kΩ Worst-case Start Impedance)

• Changing of Modulation Type ASK/FSK and Data Rate without Component Changes to

Allow Different Modulation Schemes in TPM and RKE

• Minimal External Circuitry Requirements for Complete System Solution

• Clock and Interrupt Generation for Microcontroller

• ESD Protection at all Pins (±2.5 kV HBM, ±200V MM, ±500V FCDM)

• Supply Voltage Range: 2.15V to 3.6V or 4.4V to 5.25V

• Typical Power-down Current < 10 nA

• Temperature Range: –40°C to +105°C

• Small 7 mm × 7 mm QFN48 Package

4960B–RKE–07/07

1. Pin Configuration

Figure 1-1. Pinning QFN48

48 47 46 45 44 43 42 41 40 39 38 37

36 RSSI

NC

1

2

3

4

5

6

7

8

9

35 CS

NC

34 TEST3

33 SCK

RF_IN

NC

32 SDI_TMDI

31 SDO_TMDO

30 CLK

433_N868

NC

ATA5721/ATA5722

NC

29 IRQ

NC

28 POUT

27 VSINT

26 NC

NC 10

NC

11

12

25 XTAL2

13 14 15 16 17 18 19 20 21 22 23 24

2

ATA5721/ATA5722

4960B–RKE–07/07

ATA5721/ATA5722

2. Change Notice Based on Datasheet ATA5823/ATA5824 -- UHF ASK/FSK

Transceiver Rev. 4829D-RKE-06/06

This change notice is based on the datasheet of the UHF transceiver ATA5823/ATA5824 and

describes the changes and extensions of the receiver ATA5721/ATA5722.

The receiver contains the same silicon as the transceiver, a UHF front-end die ATA5890 or

ATA5891 (depending on the frequency version 433.92 MHz or 315 MHz) and the signal pro-

cessing die ATA5889.

Unlike the transceiver, the receiver does not have the transmit functionality, and pins 8, 9 and 10

are not connected. The only change to the receiver is that it has a different bonding inside to dis-

able the TX functionality.

All described specifications and parameters of the transmit functionality in the transceiver

datasheet are not valid for the receiver. If the device is programmed to operate in receive mode,

there will be no difference between the transceiver and receiver. The user has the ability to pro-

gram the dedicated registers for transmit mode and switch the receiver into transmit mode; if this

is done, the receiver will not work.

In addition to the removed transmitter functionality, the receiver ATA5721/ATA5722 is also not

specified or released for the use in the 867-MHz to 870-MHz frequency band. All described

specifications and parameters of the 868.3 MHz receive functionality in the transceiver

datasheet are also not valid for the receiver.

The receive functionality will be fully tested according to the Electrical Characteristics of the

transceiver to guarantee the same performance of the 315-MHz version ATA5721 and

433.92-MHz version ATA5722.

Below, all changes and extensions of the receiver functionality are described in detail with cross

references to the transceiver datasheet. The feature list is completely adapted for the receiver.

3

4960B–RKE–07/07

3. Changes and Extensions of the Receiver ATA5721/ATA5722 Compared to the

Transceiver Datasheet ATA5823/ATA5824

• IC changed from transceiver to receiver due to removed TX functionality

• Device type numbers changed from ATA5823 to ATA5721 (313-MHz to 316-MHz version) and

from ATA5824 into ATA5722 (433-MHz to 435-MHz version)

• No TX operation mode available due to removed bondwires of pins 8, 9 and 10

• Pins 8, 9 and 10 are NC (not connected) and have to be soldered to GND on the PCB

• No full-duplex operation mode possible

• All descriptions of TX operation in half-duplex mode are not valid

• The receiver type ATA5722 is only specified and tested in the frequency range of 433 MHz to

435 MHz, receive functionality in the 867-MHz to 870-MHz frequency band is neither

specified nor tested.

• All descriptions of 867-MHz to 870-MHz applications are not valid.

Table 3-1.

Changes and Extensions of the Receiver ATA5721/ATA5722 Compared to the

Transceiver Datasheet ATA5823/ATA5824

Category of

Change⁽¹⁾

Page

Note

Benefit is a less demanding specification for the microcontroller due to

2

handling of power-down mode, delivering of clock, and complete handling of

receive protocol and polling

CH

Figure 2-1 “Pinning QFN48” and Table 2-1 “Pin Description” contains 3 pins (8,

9 and 10) changed to NC (Not Connected). Pin 6 (433_N868) still selects the

input frequency range, but 868 MHz is not supported

CH

3/4

Figure 1-1 “System Block Diagram” and figure 2-2 “Block Diagram” contain an

RF rReceiver section without a power amplifier part

3/5

5

CH

Figure 2-2 “Block Diagram” contains the input frequency range selection with

pin 6, but 868 MHz is not supported.

Application circuits figure 3-1, 4-1 and 5-1 are not valid

Application circuit figure 6-1 is still valid, except the transmit application hints

and the possibility to select the input frequency range between 433 MHz and

868 MHz

NV

CH

6/7/8

18

19

21

23

24

25

30

Section 7.11 is still valid, except the descriptions of transmit operation mode

Section 7.12 is not valid

CH

NV

CH

Section 7.13 is not valid

Section 7.14 is not valid

Sections 7.15 and 7.16 are not valid

All of section 8 is not valid

Table 9-1 is still valid, except the frequency calculation at 868.3 MHz

Figure 12-1 is still valid, except the transmit-related bits in control registers 7

and 8.

36

CH

Section 12.2 is still valid for RX operation

Table 12-2 is not valid

CH

NV

37

Note:

1. Category of Change means: CH = values or definitions are changed, NV = values or defini-

tions are not valid

4

ATA5721/ATA5722

4960B–RKE–07/07

ATA5721/ATA5722

Table 3-1.

Changes and Extensions of the Receiver ATA5721/ATA5722 Compared to the

Transceiver Datasheet ATA5823/ATA5824 (Continued)

Category of

Change⁽¹⁾

Page

Note

Table 12-5 is still valid, except the TX and full-duplex modes

Table 12-6 is still valid, except the TX operation

Table 12-9 is not valid

CH

NV

38

39

40

Table 12-12 is still valid, except the TX and full-duplex modes

Table 12-13 is still valid, except the TX mode

CH

Table 12-18 is still valid, except the full-duplex mode

Table 12-19 and 12-20 are still valid, except the full-duplex mode

CH

41

42

Table 12-21 is not valid, except the TX and full-duplex modes

Table 12-22 and 12-24 are not valid

CH

NV

43

50

60

61

64

Table 12-25 is not valid

NV

CH

NV

Section 13.8 is valid, except the transmit mode

Table 14-3 is still valid, except the Lim_min and Lim_max values for 868.3 MHz

Section 14.2 is not valid

Section 14.3 is not valid

Table 14-8 is still valid, except interrupts caused by TX and full-duplex

operation

70

CH

NV

In section 17, Electrical Characteristics, all specifications, parameters,

descriptions and conditions of the 868.3-MHz RX/TX application are not valid.

Section 17 Electrical Characteristics No. 1.6 is not valid

72

NV

77-79 Section 17 Electrical Characteristics No. 3.1 through 3.11 are not valid

79-81 Section 17 Electrical Characteristics No. 4.1 through 4.18 are not valid

83

Section 17 Electrical Characteristics No. 6.1 and 6.2 are not valid

Section 17 Electrical Characteristics No. 7.1 through 7.10 are valid except the

Electrical Characteristics specified for 868.3 MHz

83-84

CH

84-85 Section 17 Electrical Characteristics No. 8.1 and 8.2 are not valid

NV

87

88

89

91

93

Section 18 Electrical Characteristics No. 10.12 and 10.13 are not valid

Section 18 Electrical Characteristics No. 11.1 through 11.4 are not valid

Section 19 Electrical Characteristics No. 12.11 and 12.12 are not valid

Section 19 Electrical Characteristics No. 13.1 through 13.4 are not valid

Section 20 Electrical Characteristics No. 16.1 is not valid

Section 20 Electrical Characteristics No. 19.1 through 19.5 are not valid

Section 21 Electrical Characteristics No. 20.12 is not valid

Ordering information:

96

ATA5721-PLQW | QFN48 | 7 mm × 7 mm, Pb-free

ATA5722-PLQW | QFN48 | 7 mm × 7 mm, Pb-free

CH

Note:

1. Category of Change means: CH = values or definitions are changed, NV = values or defini-

tions are not valid

5

4960B–RKE–07/07

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4960B–RKE–07/07


型号：	ATA5722
厂家：	ATMEL
描述：	UHF ASK/FSK Receiver
文件：	总6页 (文件大小：102K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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