AHM28108B

Description

AHM28108B is the Wi-Fi HaLow™ industrial M.2 module

The AHM28108B allows building long-range, ultra-low power Wi-Fi networks in sub 1 GHz license-exempt bands, utilizing compact M.2 2242/2230 form factor.
The AHM28108B data rate up to 43.3 Mbps at 8 MHz bandwidth with the high-speed data rate, it enables connectivity for many IoT applications, including sensors, weather stations, industrial monitoring, medical patient monitoring, agriculture monitoring, surveillance camera.

Key Features

Morse Micro MM8108 HaLow chipset
IPEX4 (MHF4) antenna connector
IPEX (MHF1) antenna connector
Power LED
WiFi HaLow LED
M.2/NGFF 2242/2230 B-Key

Specifications

hipset	Morse Micro MM8108
Frequency	915 MHz (US) 868 MHz (EU) 850/924 MHz (JP) 920 MHz (TW)
Modulation	OFDM with BPSK, QPSK, 16QAM, 64QAM, 256QAM
Max. Data rate	Up to 43.3 Mbps @ 8 MHz bandwidth (Max. Phy rate)
Channel bandwidth	1/2/4/8 MHz (US) 1 MHz (EU) 1/2/4 MHz (JP) 1/2/4/MHz (TW)
Antenna connector	1x IPEX4 (MHF4) antenna connector (Default) 1x IPEX (MHF1) antenna connector (Optional)
Host interface	USB
LED	Power LED WiFi HaLow LED
Form factor	M.2/NGFF 2242/2230 B-Key
Dimensions	22 x 42 mm / 22 x 30 mm
Operating temperature	-40°C to 85°C (-40°F to 185°F)
Software & SDK	https://github.com/MorseMicro
Board configuration file (BCF)	Linux based: bcf_aw_hm677.bin mm8108b2-rl.bin STM32 based: bcf_boardtype_0a02.mbin

Supports worldwide bands from 850MHz to 950MHz
AHM28108B (US) AHM28108B (EU) AHM28108B (JP) AHM28108B (TW)	902 MHz – 928 MHz 863 MHz – 868 MHz 920.5 – 927.5 MHz 920.5 – 924.5 MHz	26 MHz 5 MHz 7 MHz 4 MHz

RF Specifications & Operating Conditions

Tx transmit power / Rx receive sensitivity
Data Rate	Modulation	BW=1M			BW=2M			BW=4M			BW=8M
Data Rate	Modulation	Tx (dBm) +/-2	Rx (dBm)	PHY rate (Mbps)	Tx (dBm) +/-2	Rx (dBm)	PHY rate (Mbps)	Tx (dBm) +/-2	Rx (dBm)	PHY rate (Mbps)	Tx (dBm) +/-2	Rx (dBm)	PHY rate (Mbps)
MCS0	BPSK	25	-104	0.3	24.5	-102	0.7	22.5	-99	1.5	21.5	-95	3.3
MCS1	QPSK	25	-102	0.7	24.5	-100	1.4	22	-95	3.0	20.5	-92	6.5
MCS2	QPSK	25	-100	1.0	24.5	-97	2.2	22	-93	4.5	20.5	-90	9.8
MCS3	16-QAM	24.5	-97	1.3	24.5	-94	2.9	22	-90	6.0	20.5	-87	13
MCS4	16-QAM	23.5	-94	2.0	24	-91	4.3	22	-86	9.0	20.5	-84	20
MCS5	64-QAM	21	-90	2.7	22.5	-87	5.8	21	-82	12	20	-80	26
MCS6	64-QAM	21	-88	3.0	21	-85	6.5	20	-81	14	19	-78	29
MCS7	64-QAM	18.5	-87	3.3	19.5	-83	7.2	19	-79	15	18.5	-77	33
MCS8	256-QAM	17	-83	4.0	17.75	-79	8.9	18.5	-75	18	17.5	-73	39
MCS9	256-QAM	15.75	-80	4.4	--	--	--	16.75	-74	20	16	-71	43

Note: The following transmit power levels are for IEEE compliance for 802.11ah.

They do not consider any backoffs needed for regional spectrum compliance (e.g., FCC, CE, TELEC, NCC).

TX power in edge channels will be limited by the restricted band edge in the regulatory regions.

◎ Operating Conditions

Symbol	Minimum	Typical	Maximum	Unit
3.3V (VDD33)	3.0	3.3	3.6	V
TAMBIENT (Ambient temperature)	-40		85	°C
Tstg (Storage temperature)	-40		125	°C

Power Consumption

◎ Transmit Power Consumption

No.	Item			3.3V
Band (MHz)	Mode	BW (MHz)	RF Powe (dBm)	Transmit (mA)
Band (MHz)	Mode	BW (MHz)	RF Powe (dBm)	Max.	Avg.
11ah US_915	MCS0	1	25	134.61	115.91
		2	24.5	135.06	111.93
		4	22.5	133.97	107.48
		8	21.5	140.48	110.28
	MCS9	1	15.75	109.47	89.18
	MCS8	2	17.75	114.48	89.71
	MCS9	4	16.75	119.58	92.2
	MCS9	8	16	129.01	99.19
11ah EU_865.5	MCS0	1	14.75	106.6	92.08
11ah EU_865.5	MCS9	1	14.75	108.39	89.44

◎ Receive Power Consumption

No.	Item		3.3V
Band (MHz)	Mode	BW (MHz)	Receive (mA)
Band (MHz)	Mode	BW (MHz)	Max.	Avg.
11ah US_915	MCS0	1	81.05	76.9
		2	82.74	78.39
		4	87.48	82.43
		8	97.09	90.41
	MCS9	1	83.29	76.68
	MCS8	2	85.64	78.53
	MCS9	4	91.04	82.93
	MCS9	8	100.89	91.27
11ah EU_865.5	MCS0	1	84.27	78.28
11ah EU_865.5	MCS9	1	84.62	78.4

M.2 Pinout Assignment

Top			Bottom
75		GND	3.3V (VDD33)		74
73		GND	3.3V (VDD33)		72
71		GND	3.3V (VDD33)		70
69		GND	NC		68
67	I	MM_RESET# (active low)	NC		66
65		NC	NC		64
63		NC	NC		62
61		NC	NC		60
59		NC	NC		58
57		GND	NC		56
55		NC	MM_WAKE (active high)	I	54
53		NC	NC		52
51		GND	NC		50
49		NC	NC		48
47		NC	NC		46
45		GND	NC		44
43		NC	NC		42
41		NC	NC		40
39		GND	NC		38
37		NC	NC		36
35		NC	NC		34
33		GND	NC		32
31		NC	NC		30
29		NC	NC		28
27		GND	NC		26
25		NC	NC		24
23		NC	NC		22
21		GND	NC		20
Mechanical Key
11		GND	NC		10
9	I/O	USB 2.0 D-	NC		8
7	I/O	USB 2.0 D+	FULL CARD POWER OFF# (active low)	I	6
5		GND	3.3V (VDD33)		4
3		GND	3.3V (VDD33)		2
1		NC

* FULL_CARD_POWER_OFF# is an active low input signal that is used to turn off the entire adapter.
M.2 module turns on since the pin is pulled high by the host (pin 6 connected to 3.3 V).