Cdtech EL.MT7668BUN-WFT Wifi Module
Overview
The EL.MT7668BUN-WFT is a highly integrated single chip Module which has built in a 2×2 dual-band wireless LAN radio and Bluetooth radio.It supports IEEE 802.11a/b/g/n 11ac standard and provides the highest PHY rate up to 867Mbps,offering feature-rich wireless connectivity and reliable throughput from an extended distance.It includes Bluetooth EDR and LE radio which complies with Bluetooth v2.1+EDR,v4.2,Low Energy, and v5.0.
The EL.MT7668BUN-WFT integrates PA/LNA such that the number of the external components is reduced to minimum.Intelligent MAC design deploys a high efficient DMA engine and hardware data processing accelerators which offloads the host processor.
The EL.MT7668BUN-WFTsupports the 802.11i security standard and implements hardware acceleration for TKIP,CCMP and WAPI. The device also supports 802.11e Qos for
video,voice,and multimedia applications.
The EL.MT7668BUN-WFT can provide a comcurrent operation of Wi-Fi and Bluetooth over USB interace. An intelligent Wi-Fi/Bluetooth coexistence algorithm is implemented to reach the best Wi-Fi and Bluetooth radio performance.
Features
Platform
- Embedded high-performance 32-bit RISC microprocessor
- Highly integrated RF with 28nm CMOS technology
- Integrate high efficiency switching regulator
- 40MHz crystal clock support with low power operation in sleep mode
- Best-in-class active and idle power consumption performance
- Fully Compliance with USB v2.0 specification
- Internal thermal sensor for temperature compensation and thermal protection.
- Self calibration.
- Advanced FDD/TDD mode Wi-Fi/Bluetooth coexistence scheme.
- Wi-Fi and Bluetooth over USB.
WLAN
- IEEE 802.11a/b/g/n11ac compliant
- Support 20MHz,40MHz,80MHz in 5GHz band,and 20MHz,40MHz bandwidth in 2.4GHz band.
- Embedded high-performance 32-bit RISC microprocessor
- Dual-band 2T2R mode with data rate up to 867Mbps
- Greenfield,mixed mode,legacy modes support
- Integrated LNA,PA,and T/R switch
- Optional external LNA and PA support.
- IEEE 802.11d/e/h/i/k/r/w support
- Security support for WGA WPA/WPA2 personal,WPS2.0,WAPI
- Supports 802.11w proteced managed frames
- QoS support of WFA WMM,WMM PS
- Supports Wi-Fi Direct
- Fully compliance with USB v2.0
- Wake on WLAN
Bluetooth
- Bluetooth specification v2.1+EDR
- Bluetooth v4.2 Low Energy(LE)
- Standard HCI interface over USB super-speed,high-speed and full-speed mode
- Best-in-class BT/Wi-Fi coexistence performance
- Scatternet support:Up to 7 piconets simultaneously with background inquiry/page scan
- Up to 7 simulaneous active ACL links
- Support SCO and SCO link with re-transmission
- Support wide-band speech and hardware accelerated SBC codec for A2DP streaming
- Packet loss concealment
- Channel assessment or AFH
- 3DD support
Block Diavgram
General Specification
| Model | EL.MT7668BUN-WFT |
| Product Name | WLAN 11a/b/g/n/ac USB2.0 2T2R + Bluetooth 5.0module |
| Major Chipset | MT7668BU |
| Standard | 802.11a/b/g/n/ac |
| Modulation Method | BPSK/ QPSK/ 16-QAM/ 64-QAM/256-QAM |
| Frequency Band | 2.4GHz and 5GHz ISM Band |
| WiFi Interface | USB2.0 |
| BT Interface | USB2.0 |
| Ambient Operating Temperature | -10° C ~ 70° C |
| Storage Temperature | -40° C ~ 90°C |
| Humidity | 5% to 90% maximum |
| Dimension | 25.0*30*6.0mm (LxWxH) ±0.2mm |
Electrical Characteristics
WiFi Section:
2.4GHz RF Specification
| Feature | Description | |
| WLAN Standard | IEEE 802.11a/b/g/n/ac WiFi compliant | |
| Frequency Range | 2412 ~ 2462 MHz (2.4 GHz ISM Band) | |
| Number of Channels | CH11 | |
| Modulation | 802.11b : DQPSK, DBPSK, CCK 802.11 g/n : OFDM /64-QAM,16-QAM, QPSK, BPSK | |
|
Output Power | 802.11b /11Mbps : 17dBm ± 2dB @ EVM ≤ -15dB | |
| 802.11g /54Mbps : 15 dBm ± 2dB @ EVM ≤ -28dB | ||
| 802.11n HT20 /MCS7: 14 dBm ± 2dB @ EVM ≤ -30dB | ||
| 802.11n HT40 /MCS7 : 14 dBm ± 2dB @ EVM ≤ -30dB | ||
| Receive Sensitivity 11b,20MHz @8%PER | – 1Mbps | PER @ -95 dBm, typical |
| – 11Mbps | PER @ -88dBm, typical | |
| Receive Sensitivity 11g,20MHz @10%PER | – 6Mbps | PER @ -93 dBm, typical |
| – 54Mbps | PER @ -75 dBm, typical | |
| Receive Sensitivity 11n,20MHz @10%PER | – MCS=0 | PER @ -93 dBm, typical |
| – MCS=7 | PER @ -74 dBm, typical | |
| Receive Sensitivity 11n,40MHz @10%PER | – MCS=0 | PER @ -89 dBm, typical |
| – MCS=7 | PER @ -70 dBm, typical | |
5GHz RF Specification
| Feature | Description |
| WLAN Standard | IEEE 802.11a/n/ac 2×2, WiFi compliant |
| Frequency Range | 5150 MHz ~5250MHz;5725 MHz ~5850 MHz |
| Number of Channels | 5.0GHz：Please see the table |
| Modulation | 802.11a : OFDM /64-QAM,16-QAM, QPSK, BPSK 802.11n : OFDM /64-QAM,16-QAM, QPSK, BPSK 802.11ac : OFDM /256-QAM |
|
Output Power | 802.11a 54Mbps: 15 dBm ± 2dB @ EVM ≤ -25dB |
| 802.11n HT20 /MCS7 : 14 dBm ± 2 dB @ EVM ≤ -28dB | |
| 802.11n HT40 /MCS7 : 14 dBm ± 2 dB @ EVM ≤ -28dB | |
| 802.11ac VHT20 /MCS8 : 14 dBm ± 2 dB @ EVM ≤ -30dB | |
| 802.11ac VHT40 /MCS9 : 13 dBm ± 2 dB @ EVM ≤ -32dB | |
| 802.11ac VHT80 /MCS9 : 13 dBm ± 2 dB @ EVM ≤ -32dB | |
| Receive Sensitivity 11a,20MHz @10%PER | – 6Mbps PER @ -92 dBm, typical |
| – 54Mbps PER @ -75 dBm, typical | |
| Receive Sensitivity | – MCS=0 PER @ -92 dBm, typical |
| – MCS=7 | PER @ -73 dBm, typical | |
| Receive Sensitivity 11n,40MHz @10%PER | – MCS=0 | PER @ -89 dBm, typical |
| – MCS=7 | PER @ -70 dBm, typical | |
| Receive Sensitivity 11ac,20MHz @10%PER | – MCS=0, NSS1 | PER @ -90 dBm, typical |
| – MCS=8, NSS1 | PER @ -66 dBm, typical | |
| Receive Sensitivity 11ac,40MHz @10%PER | – MCS=0, NSS1 | PER @ -87 dBm, typical |
| – MCS=9, NSS1 | PER @ -63 dBm, typical | |
| Receive Sensitivity 11ac,80MHz @10%PER | – MCS=0, NSS1 | PER @ -84 dBm, typical |
| – MCS=9, NSS1 | PER @ -60 dBm, typical | |
| Antenna Reference | ||
Bluetooth Section:
| Feature | Description | ||
| General Specification | |||
| Bluetooth Standard | Bluetooth V2.1+EDR,V4.2,V5.0. | ||
| Host Interface | USB2.0 | ||
| Frequency Band | 2402 MHz ~ 2480 MHz | ||
| Number of Channels | 79 channels | ||
| Modulation | GFSK, DPSK, DQPSK | ||
| RF Specification | |||
| Min | Typical | Max | |
| Output Power | 8 dBm | ||
| Sensitivity @ BER=0.1% for GFSK (1Mbps) | -86 dBm | ||
| Sensitivity @ BER=0.01% for π/4-DQPSK (2Mbps) | -86 dBm | ||
| Sensitivity @ BER=0.01% for 8DPSK (3Mbps) | -80 dBm | ||
|
Maximum Input Level | GFSK (1Mbps):-20dBm | ||
| π/4-DQPSK (2Mbps) :-20dBm | |||
| 8DPSK (3Mbps) :-20dBm | |||
Electrical Characteristics
WLAN current consumption
| Description | TYP | Unit |
| Sleep mode, radio off (USB suspend) | 1.5 | mA |
| 2.4GHz RX Power saving, DTIM=1 | 3.3 | mA |
| 2.4GHz RX Active, HT20, MCS15 | 144 | mA |
| 2.4GHz TX CCK, 11Mbps @ 21dBm | 403 | mA |
| 2.4GHz TX HT20, MCS15 @ 17.5dBm | 496 | mA |
| 2.4GHz TX HT20, MCS8 @ 18dBm | 520 | mA |
| 5GHz VHT80 RX Listen, 2RX | 154 | mA |
| 5GHz RX Active, VHT80, MCS9, Nss=2 | 242 | mA |
| 5GHz TX VHT80, MCS9, Nss=2 @ 15dBm | 678 | mA |
| 5GHz TX VHT80, MCS0, Nss=2 @ 16.5dBm | 713 | mA |
Bluetooth current consumption
| Description | TYP | Unit |
| Sleep mode, radio off (USB suspend) | 1.5 | mA |
| Bluetooth TX @ 9dBm | 42 | mA |
| Bluetooth RX | 21 | mA |
| Bluetooth SCO connection, HV3 packets+sniff mode+scan (Page scan internal=1.28sec,inquiry scan interval=2.56s,sniff interval=500ms) | 21 | mA |
| Bluetooth page scan+inquiry scan (Page scan interval=1.28s,inquiry scan interval=2.56s) | 1.7 | mA |
| Bluetooth page scan (Page scan interval=1.28s) | 1.6 | mA |
Supplier
| Material List | ||
| Diplexer | DPX165900DT-8125A LD18D2450LAN-D30 RFDIP160806BLM6T68 | TDK,GLEAD，PSA |
| Crystal | 40M 3225 | JWT ，FK , SFJ |
| IC | MTK7668BU-CG | MTK |
| Inductor | Sunlord | |
Module photo
Module size
Pin Description
| NO. | Symbol | Description |
| 1 | GND | Ground connections |
| 2 | DP | USB positive differential data lines |
| 3 | DM | USB negative differential data lines |
| 4 | VCC | Power supply 3.3V |
| 5 | RESET | System reset MT7668BUN,low active(模组 10k 上拉) |
| 6 | WOW | Wake up system via wifi,low active(模组 10k 上拉) |
| 7 | GND | Ground connections |
| 8 | NC | |
| 9 | BT_WAKE_HOST | Wake up system via BT,low active(模组 10k 上拉) |
| 10 | GND | Ground connections |
| 11 | GND | Ground connections |
| 12 | BT_RF | Bluetooth RF output |
| 13 | GND | Ground connections |
Package Size
Recommended Reflow Profile
Referred PC/JEDEC standard.
Peak Temperature : <250°C
Number of Times : 2 times
Package
The EL.MT7668BUN-WFTis ESD (electrostatic discharge) sensitive device and may be damaged with ESD or spike voltage. Although EL.MT7668BUN-WFT is with built-in ESD protection circuitry, please handle with care to avoid the permanent malfunction or the performance degradation.
OEM integration instructions
This device is intended only for OEM integrators under the following conditions:
The transmitter module may not be co-located with any other transmitter or antenna. The module shall be only used with the external antenna(s) that has been originally tested and certified with this module.
As long as the conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, etc.).
Validity of using the module certification:
In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization for this module in combination with the host equipment is no longer considered valid and the FCC ID of the module cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization.
End product labeling:
The final end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID: 2AWY6-ELMT7668BUNT”.
Information that must be placed in the end user manual:
The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user’s manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual.
Integration instructions for host product manufacturers according to KDB 996369 D03 OEM Manual v01
List of applicable FCCrules
FCC Part 15 Subpart C 15.247 & 15.207 & 15.209 & 15.407
Specific operational useconditions
The module WiFi Module is a module with WIFI 2.4G / BT/ WIFI 5G function.
Operation Frequency: WIFI 2.4G:2412~2462MHz
BT:2402~2480MHz
WIFI 5G:5150 MHz ~5250MHz; 5725 MHz ~5850 MHz
Type:
WIFI 2.4G:PIFA Antenna; Gain: Antenna 1: 1.2 dBi; Antenna 2: 1.76dBi
WIFI 5G:PIFA Antenna; Gain: Antenna 1: 3.25 dBi; Antenna 2: 3.55dBi
BT:External Antenna; Gain: 1 dBi
The module can be used for mobile or applications with the maximum (WIFI 2.4G:Ant1:1.2dBi;Ant2:1.76dBi;WIFI5G:Antenna 1: 3.25 dBi; Antenna 2: 3.55dBi;BT: 1 dBi); The host manufacturer installing this module into their product must ensure that the final composit product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operaition. The host manufacturer has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user’s manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual.
Limited module procedures
Not applicable. The module is a Single module and complies with the requirement of FCC Part 15.212.
Trace antenna designs
Not applicable. The module has its own antenna, and doesn’t need a host’s printed board microstrip trace antenna etc.
RF exposure considerations
The module must be installed in the host equipment such that at least 20cm is maintained between the antenna and users’ body; and if RF exposure statement or module layout is changed, then the host product manufacturer required to take responsibility of the module through a change in FCC ID or new application. The FCC ID of the module cannot be used on the final product. In these circumstances, the host manufacturer will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization
Antennas
Antenna Specification are as follows:
Type:
WIFI 2.4G:PIFA Antenna; Gain: Antenna 1: 1.2 dBi; Antenna 2: 1.76dBi
WIFI 5G:PIFA Antenna; Gain: Antenna 1: 3.25 dBi; Antenna 2: 3.55dBi
BT:External Antenna; Gain: 1 dBi
This device is intended only for host manufacturers under the following conditions: The transmitter module may not be co-located with any other transmitter or antenna;
The module shall be only used with the internal antenna(s) that has been originally tested and certified with this module. The antenna must be either permanently attached or employ a ‘unique’ antenna coupler.
As long as the conditions above are met, further transmitter test will not be required. However, the host manufacturer is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, etc.).
Label and complianceinformation
Host product manufacturers need to provide a physical or e-label stating “Contains FCC ID: 2AWY6-ELMT7668BUNT” with their finished product.
Information on test modes and additional testing requirements
Data transfer module demo board can control the EUT work in RF test mode at specified test channel. Additional testing, Part 15 Subpart B disclaimer.
The module without unintentional-radiator digital circuit, so the module does not required an evaluation by FCC Part 15 Subpart B. The host should be evaluated by the FCC Subpart B.
Additional testing, Part 15 Subpart Bdisclaimer
The modular transmitter is only FCC authorized for FCC Part 15 Subpart C 15.247 & 15.207 & 15.209 & 15.407 and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional-radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.
FCC STATEMENT
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.
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 generate, uses and can radiate radio frequency energy and, if not installed and 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 user is 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.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.
IC Caution:
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-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 the device.
Manufacturer’s Name: EXPRESS LUCK INDUSTRIAL (SHENZHEN) LIMITED
Product Name: WiFi Module
Trade Mark: CDTECH
Model number: EL.MT7668BUN-WFT
This device is in compliance with the essential requirements and other relevant provisions of Directive 2014/53/EU. All essential radio test suites have been carried out.
The device complies with RF specifications when the device used at 20cm from your body.
The product shall only be connected to a USB interface of version USB2.0
RF Secification
| Function | Operation Frequency | Max RF output power: | Limit |
| BLE | 2402MHz–2480MHz | 8.56dBm | 20 dBm. |
| BT(BR+EDR) | 2402MHz–2480MHz | 8.14dBm | 20 dBm. |
| WIFI 802.11b/g/ n(HT20,HT40) | 802.11b/g/n(20MHz): 2412~2472MHz; 802.11n(40MHz):2422~2462MHz | 16.73dBm | 20 dBm. |
| Wi-Fi 5.2G(802.11a/ n(20/40)/ac(20/4 0/80)) | 5180MHz~5240MHz(20MHz) 5190MHz~5230MHz(40MHz) 5210MHz(80MHz) | 11.29dBm | 23 dBm. |
| Wi-Fi 5.8G(802.11a/n2 0/ac20/n40/ac40 /ac80) | 5745-5825 MHz for 802.11a/n(HT20)/ac20; 5755-5795 MHz for 802.11n(HT40)/ac40; 5775MHz for 802.11 ac80 | 11.99dBm | 13.98 dBm. |
This product can be used across EU member states.
DECLARATION OF CONFORMITY
I hereby declare that the product
- Product Name: WiFi Module
- Product Description: WiFi Module
- Model: EL.MT7668BUN-WFT
(Name of product, type or model, batch or serial number) - System components:
- Antenna Type: WIFI 5G: PIFA Antenna
- Antenna Gain: Antenna1: 3.25 dBi;Antenna 2: 3.55dBi
- WIFI 2.4G: PIFA Antenna
- Antenna Gain: Antenna 1: 1.2 dBi; Antenna 2: 1.76dBi
- BT: External Antenna
- Antenna Gain:1 dBi
- Hardware Version: CDW-F97668U-01-V0
- Software Version: CDW-F97668U-01-MT7668U_Efuse_V0_20220425
Satisfies all the technical regulations applicable to the product within the scope of Council Directives 2014/53/EU:and declare that the same application has not been lodged with any other notified body.
| HEALTH & SAFETY Art. 3(1)(a): | EN IEC 62311:2020 EN 62368-1:2014+A11:2017 |
| Electromagnetic Compatibility Art. 3.1(b): | ETSI EN 301 489-1 V2.2.3 (2019-11) ETSI EN 301 489-3 V2.1.1 (2019-03) ETSI EN 301 489-17 V3.2.4 (2020-09) |
| Effective Use of Spectrum Art. 3.2 | ETSI EN 300 328 V2.2.2 (2019-07) ETSI EN 301 893 V2.1.1 (2017-05) ETSI EN 300 440 V2.2.1 (2018-07) |
All essential radio test suites have been carried out.
MANUFACTURER or AUTHORISED REPRESENTATIVE:
Address: EXPRESS LUCK INDUSTRIAL (SHENZHEN) LIMITED
Floor1,Workshop1, NO.88, SOUTH BAOTONG ROAD,XIKENG COMMUNITY, YUANSHAN STREET, LONGGANG DISTRICT, Shenzhen, China
This declaration is issued under the sole responsibility of the manufacturer and, if applicable, his authorised representative.
