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
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
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
UHF ASK/FSK
Receiver
ATA5721
ATA5722
4960B–RKE–07/07
1. Pin Configuration
Pinning QFN48
NC
NC
RX_ACTIVE
N_PWR_ON
SCK_PHA
SCK_POL
NC
NC
PWR_ON
RX_TX1
RX_TX2
CDEM
Figure 1-1.
48 47 46 45 44 43 42 41 40 39 38 37
36
1
35
2
34
3
33
4
32
5
31
6
ATA5721/ATA5722
30
7
29
8
28
9
27
10
26
11
25
12
13 14 15 16 17 18 19 20 21 22 23 24
RSSI
CS
TEST3
SCK
SDI_TMDI
SDO_TMDO
CLK
IRQ
POUT
VSINT
NC
XTAL2
NC
NC
NC
AVCC
VS2
VS1
SETPWR
TEST1
DVCC
CS_POL
TEST2
XTAL1
NC
NC
NC
RF_IN
NC
433_N868
NC
NC
NC
NC
NC
NC
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 processing 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 disable 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 program 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.
Page
Note
Category of
Change(1)
Benefit is a less demanding specification for the microcontroller due to
handling of power-down mode, delivering of clock, and complete handling of
receive protocol and polling
CH
3/4
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
CH
3/5
Figure 1-1 “System Block Diagram” and figure 2-2 “Block Diagram” contain an
RF rReceiver section without a power amplifier part
CH
5
Figure 2-2 “Block Diagram” contains the input frequency range selection with
pin 6, but 868 MHz is not supported.
CH
6/7/8
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
18
Section 7.11 is still valid, except the descriptions of transmit operation mode
CH
19
Section 7.12 is not valid
NV
21
Section 7.13 is not valid
NV
23
Section 7.14 is not valid
NV
24
Sections 7.15 and 7.16 are not valid
NV
25
All of section 8 is not valid
NV
30
Table 9-1 is still valid, except the frequency calculation at 868.3 MHz
CH
36
Figure 12-1 is still valid, except the transmit-related bits in control registers 7
and 8.
CH
37
Section 12.2 is still valid for RX operation
Table 12-2 is not valid
CH
NV
2
Note:
4
Changes and Extensions of the Receiver ATA5721/ATA5722 Compared to the
Transceiver Datasheet ATA5823/ATA5824
1. Category of Change means: CH = values or definitions are changed, NV = values or definitions are not valid
ATA5721/ATA5722
4960B–RKE–07/07
ATA5721/ATA5722
Table 3-1.
Page
Changes and Extensions of the Receiver ATA5721/ATA5722 Compared to the
Transceiver Datasheet ATA5823/ATA5824 (Continued)
Note
Category of
Change(1)
38
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
CH
NV
39
Table 12-12 is still valid, except the TX and full-duplex modes
CH
40
Table 12-13 is still valid, except the TX mode
CH
41
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
CH
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
Table 12-25 is not valid
NV
50
Section 13.8 is valid, except the transmit mode
CH
60
Table 14-3 is still valid, except the Lim_min and Lim_max values for 868.3 MHz
CH
61
Section 14.2 is not valid
NV
64
Section 14.3 is not valid
NV
70
Table 14-8 is still valid, except interrupts caused by TX and full-duplex
operation
CH
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
NV
72
77-79
Section 17 Electrical Characteristics No. 3.1 through 3.11 are not valid
NV
79-81
Section 17 Electrical Characteristics No. 4.1 through 4.18 are not valid
NV
83
NV
Section 17 Electrical Characteristics No. 6.1 and 6.2 are not valid
NV
83-84
Section 17 Electrical Characteristics No. 7.1 through 7.10 are valid except the
Electrical Characteristics specified for 868.3 MHz
CH
84-85
Section 17 Electrical Characteristics No. 8.1 and 8.2 are not valid
NV
87
Section 18 Electrical Characteristics No. 10.12 and 10.13 are not valid
NV
87
Section 18 Electrical Characteristics No. 11.1 through 11.4 are not valid
NV
88
Section 19 Electrical Characteristics No. 12.11 and 12.12 are not valid
NV
89
Section 19 Electrical Characteristics No. 13.1 through 13.4 are not valid
NV
91
Section 20 Electrical Characteristics No. 16.1 is not valid
NV
93
Section 20 Electrical Characteristics No. 19.1 through 19.5 are not valid
NV
93
Section 21 Electrical Characteristics No. 20.12 is not valid
NV
96
Ordering information:
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 definitions are not valid
5
4960B–RKE–07/07
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4960B–RKE–07/07