Tejjer XN297 RF Module User Guide
- May 15, 2024
- Tejjer
Table of Contents
XN297 module specification
XN297 RF Module
Important Notice:
TEJJER reserves the right to make changes to its products or to discontinue
any integrated circuit product or service without notice. TEJJER integrated
circuit products are not designed, intended, authorized, or warranted to be
suitable for use in life-support applications, devices or systems or other
critical applications. Use of TEJJER products in such applications is
understood to be fully at the risk of the customer.
Revision History
Rev. No.
| History| Issue Date| Remark
---|---|---|---
1.0| Initial issue T22301071| January-2023|
Preliminary
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General Description
The T22301071 module is designed for 2.4GHz ISM band wireless applications using XN297 GFSK transceiver. The module has a three-wire SPI interface for communication. The maximum data rate is 4Mbps
Electrical specification
| Symbol | Condition at VCC = 3V±5%, T=25℃ | Parameter | Unit |
|---|---|---|---|
| Min | Typ | Max | |
| ICC | Sleep | 2 | |
| Standby I | 30 | ||
| Standby III | 650 | ||
| Standby Ⅱ | 780 | ||
| TX at -35dBm output power | 9 | ||
| TX at -20dBm output power | 9.5 | ||
| TX at 0dBm output power | 16 | ||
| TX at 2dBm output power | 19 | ||
| TX at 8dBm output power | 30 | ||
| TX at 13dBm output power | 66 | ||
| RX at 2Mbps | 16.5 | ||
| RX at 1Mbps | 15.5 | ||
| RX at 250kbps | 15 |
General RF
f OP| Operating frequency| 2400| | 2483| MHz
PLL res| PLL Programming resolution| | １| | MHz
f XTAL| Crystal frequency| | 16| | MHz
DR| Data rate| 1| | 2| Mbps
D f 250 K| Frequency deviation at 250kbps| | 125| | KHz
D f 1 M| Frequency deviation at 1Mbps| | 160| 250| KHz
D f 2 M| Frequency deviation at 2Mbps| | 320| 500| KHz
FCH 250 K| Channel spacing at 250Kbps| | 1| | MHz
FCH 1 M| Channel spacing at 1Mbps| | 1| | MHz
FCH 2 M| Channel spacing at 2Mbps| | 2| | MHz
Transmitter
PRF| Typical output power| 2| 8| 13| dBm
PRFC| Output Power Range| -35| | 13| dBm
PBW 1| 20dB Bandwidth for| | 2| | MHz
| Modulated Carrier at 2Mbps| | | |
---|---|---|---|---|---
PBW 2| 20dB Bandwidth for Modulated Carrier at 1Mbps| | 1| | MHz
PBW 3| 20dB Bandwidth for Modulated Carrier at 250Kbps| | 500| | KHz
Receiver
RX max| Maximum received signal at
<0.1% BER
| | 0| | dBm
RXSENS 1| Sensitivity (0.1%BER) @2Mbps| | -83| | dBm
RXSENS 2| Sensitivity (0.1%BER) @1Mbps| | -87| | dBm
RXSENS 3| Sensitivity (0.1%BER) @250Kbps| | -91| | dBm
C / I CO| C/I Co-channel (@2Mbps)| | 10| | dBc
C / I1 ST| 1st Adjacent Channel Selectivity C/I| | -6| | dBc
C / I2 ND| 2nd Adjacent Channel Selectivity C/I| | -10| | dBc
C / I3 RD| 3rd Adjacent Channel Selectivity C/I| | -22| | dBc
C / I4 TH| 4th Adjacent Channel Selectivity C/I| | -28| | dBc
C / I5 TH| 5th Adjacent Channel Selectivity C/I| | -34| | dBc
C / I CO| C/I Co-channel (@1Mbps)| | 10| | dBc
C / I1 ST| 1st Adjacent Channel Selectivity C/I| | 1| | dBc
C / I2 ND| 2nd Adjacent Channel Selectivity C/I| | -18| | dBc
C / I3 RD| 3rd Adjacent Channel Selectivity C/I| | -23| | dBc
C / I4 TH| 4th Adjacent Channel Selectivity C/I| | -28| | dBc
C / I5 TH| 5th Adjacent Channel Selectivity C/I| | -32| | dBc
C / I6 TH| 6th Adjacent Channel Selectivity C/I| | -35| | dBc
---|---|---|---|---|---
C / I CO| C/I Co-channel (@250Kbps)| | 2| | dBc
C / I1 ST| 1st Adjacent Channel Selectivity C/I| | -8| | dBc
C / I2 ND| 2nd Adjacent Channel Selectivity C/I| | -18| | dBc
C / I3 RD| 3rd Adjacent Channel Selectivity C/I| | -24| | dBc
C / I4 TH| 4th Adjacent Channel Selectivity C/I| | -28| | dBc
C / I5 TH| 5th Adjacent Channel Selectivity C/I| | -32| | dBc
C / I6 TH| 6th Adjacent Channel Selectivity C/I| | -35| | dBc
Operating conditions
VDD| Supply voltage| 2.2| 3| 3.3| V
VSS| Ground| | 0| | V
V OH| Output high level voltage| VDD-0.3| | VDD| V
V OL| Output low level voltage| VSS| | VSS+0.3| V
V IH| Input high level voltage| 2.0| 3| 3.6| V
V IL| Input low level voltage| VSS| | VSS+0.3| V
- Note: In the channels, such as 2416 and 2432 MHz, integer times of 16MHz crystal, receiver sensitivity degrades about 2dB; and modulation quality of the emission signal (EVM) falls by 10%.
Note: In 250KBps mode, it should not be more than 16 bytes of payload length, because of frequency drift in open-loop transmition.
Interface
| Pin No. | Pin name | Comment | Note |
|---|---|---|---|
| 1 | VIN | RF Module Supply Voltage Input | 2.3V‐3.3V |
| 2 | NC | / | |
| 3 | NC | / | |
| 4 | DATA | SPI Data I/O | |
| 5 | SCK | SPI Clock | |
| 6 | CSN | SPI Chip Selection | |
| 7 | GND | Ground |
Module packaging information
FCC Warning
This device complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Warning: Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.
Note: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation.This
equipment generates uses and can radiate radio frequency energy and, if not
installedand used in accordance with the instructions, may cause harmful
interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the
equipment off and on, the useris encouraged to try to correct the
interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
FCC Radio Frequency Exposure Statement
The antenna(s) used for this transmitter must be installed to provide a
separation distance of at least 20 cm from all persons and must not be
collocated or operating in conjunction with any other antenna or transmitter,
End-Users must be provided with transmitter operation conditions for
satisfying RF exposure compliance.
Labelling Instruction for Host Product Integrator
Please notice that if the FCC identification number is not visible when the
module is installed inside another device, then the outside of the device into
which the module is installed must also display a label eferring to the
enclosed module. This exterior label can use wording such as the following:
“Contains FCC ID: 2AXTW-XN297” any similar wording that expresses the same
meaning may be used.
Installation Notice to Host Product Manufacturer
The OEM integrator is responsible for ensuring that the end-user has no manual
instruction to remove or install module.The module is limited to installation
in mobile application, a separate approval is required for all other operating
configurations, including portable configurations with respect to §2.1093 and
difference antenna configurations.
IC Warning
This device contains license-exempt transmitter(s)/receiver(s) that comply
with Innovation, Science and Economic Development Canada’s license-exempt
RSS(s). Operation is subject to the following two conditions:
- This device may not cause interference.
- This device must accept any interference, including interference that may cause undesired operation of 1 the device.
Please notice that if the IC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: “Contains IC: 26591-XN297” any similar wording that expresses the same meaning may be used.
T22301071
2.4GHZ wireless transceiver module