Dahua 8812CU3 User manual

8812CU3
User Manual

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(Top View)
Module Name:
Module Type: 802.11ac 867Mbps 2T2R WiFi USB Module
Revision: V1.0
Customer Approval:
Company:
Title:
Signature:
Date:
BL-link Approval:
Title:
Signature:
Date:
Revision History
Revision
Summary
Release Date
0.1
Initial release
2020-05-20
1.0
Official release (change product picture)
2020-06-24

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Crystal
1. Introduction
8812CU3 is a highly integrated 2*2 dual-band wireless LAN module. It combines a
WLAN MAC, a 2T2R capable WLAN base band，a dual-band WLAN radio. It supports IEEE
802.11a/b/g/n/ac standard and provides the highest PHY rate up to 867Mbps, It can offer
feature-rich wireless connectivity and reliable throughput from an extended distance.
1.1 Features
Operating Frequencies: 2.4~2.4835GHz and 5.15~5.85GHz
Host Interface is USB2.0
IEEE Standards: IEEE 802.11a/b/g/n/ac
Wireless data rate can reach up to 867Mbps
Connect to external antenna through IPEX connectors
Power Supply: VDD 3.3V±0.2V
1.2 Block Diagram
2.4/5G
Ant0
Diplexer LED
Dual Band
Ant1
Diplexer
RTL8812CU
1.3 General Specifications
Module Name
8812CU3
Chipset
RTL8812CU-CG
WiFi Standards
IEEE802.11a/b/g/n/ac, 2T2R MIMO, 2.4G/5GHz, 867Mbps (Max)
Host Interface
USB2.0
Antenna
Connect to the external antennas through IPEX connectors
Dimension
SMD 12Pins, 27.0*17.8*3.1mm (L*W*H，Tolerance:±0.15mm)
DC-DC
VDD3.3V
USB_DP+
PDN
GND
USB_DM-
2G RF
5G RF
2G RF
5G RF

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Power Supply
VDD 3.3V±0.2V @850mA Max
Operation Temperature
-20℃ to +70℃
Operation Humidity
10% to 95% RH (Non-Condensing)
2. Pin Assignments
(Top View)
2.1 Pin Definition
No
Pin Name
Type
Description
Supply
1
GND
RF
RF Ground
2
NC
RF
NC (Reserved for 2.4/5G-ANT1)
3
GND
RF
RF Ground
4
GND
RF
RF Ground
5
NC
RF
NC (Reserved for 2.4/5G-ANT0)
6
GND
RF
RF Ground
7
LED
O
WiFi_LED Pin (Active Low, external current limiting
resistor required)
VDD
8
GND
P
Ground
9
DP+
I/O
USB 2.0 differential pair
VDD
10
DM-
I/O
USB 2.0 differential pair
VDD
11
VDD
P
DC 3.3V power supply
12
PDN
I
Power Down, this Pin can externally shutdown the
VDD

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Module (Active Low, internal pull high by 47K resistor)
IPEX0
2.4/5G-ANT0
RF
2.4G / 5G RF to IPEX connector for ANT0
IPEX1
2.4/5G-ANT1
RF
2.4G / 5G RF to IPEX connector for ANT1
P: Power, I: Input, O: Output, I/O: In/Output, RF: Analog RF Port
3. Electrical and Thermal Specifications
3.1 Recommended Operating Conditions
Parameters
Min
Typ
Max
Units
Ambient Operating Temperature
-20
25
70
℃
External Antenna VSWR (Voltage Standing Wave Ratio)
1.7
2
Supply Voltage
VDD
3.1
3.3
3.5
V
3.2 Digital I/O DC Specifications
Symbol
Parameter
Min
Typ
Max
Units
VIH
Input High Voltage
2.0
3.3
3.6
V
VIL
Input Low Voltage
--
0
0.9
V
VOH
Output High Voltage
2.97
--
3.3
V
VOL
Output Low Voltage
0
--
0.33
V
3.3 Current Consumption
Conditions : VDD=3.3V ; Ta:25℃
Use Case
VDD Current (average)
Typ
Max
Units
WiFi Radio Off (Linux Driver)
20
50
mA
WiFi Unassociated (Linux Driver)
100
150
mA
2.4G 11Mbps TX (RF-Test，1TX) for 18dBm
340
380
mA

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2.4G 11Mbps RX (RF-Test，1RX)
200
250
mA
2.4G 6Mbps TX (RF-Test，1TX) for 16dBm
330
370
mA
2.4G 6Mbps RX (RF-Test，1RX)
200
240
mA
2.4G 54Mbps TX (RF-Test，1TX) for 16dBm
240
270
mA
2.4G 54Mbps RX (RF-Test，1RX)
200
230
mA
2.4G MCS15(HT20) TX (RF-Test，2TX) for 16dBm
270
310
mA
2.4G MCS15(HT20) RX (RF-Test，2RX)
210
230
mA
2.4G MCS15(HT40) TX (RF-Test，2TX) for 16dBm
255
285
mA
2.4G MCS15(HT40) RX (RF-Test，2RX)
220
260
mA
5.8G 6Mbps TX (RF-Test，1TX) for 16dBm
390
430
mA
5.8G 6Mbps RX (RF-Test，1RX)
190
210
mA
5.8G 54Mbps TX (RF-Test，1TX) for 16dBm
255
285
mA
5.8G 54Mbps RX (RF-Test，1RX)
210
260
mA
5.8G MCS0(HT20) TX (RF-Test，2TX) for 16dBm
290
340
mA
5.8G MCS0(HT20) RX (RF-Test，2RX)
190
200
mA
5.8G MCS15(HT40) TX (RF-Test，2TX) for 16dBm
260
290
mA
5.8G MCS15(HT40) RX (RF-Test，2RX)
210
240
mA
5.8G MCS9(VHT80) TX (RF-Test，2TX) for 14dBm
250
290
mA
5.8G MCS9(VHT80) RX (RF-Test，2RX)
210
230
mA
4. WiFi RF Specifications
4.1 2.4G WiFi RF Specification
Conditions : VDD=3.3V ; Ta:25℃
Features
Description
WLAN Standard
IEEE 802.11b/g/n CSMA/CA

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Frequency Range
2.4~2.4835GHz (2.4GHz ISM Band)
Channels
Ch1~Ch11(For 20MHz Channels)
Modulation
802.11b (DSSS): DBPSK, DQPSK, CCK;
802.11g (OFDM): BPSK, QPSK, 16QAM, 64QAM;
802.11n (OFDM): BPSK, QPSK, 16QAM, 64QAM;
Date Rate
802.11b: 1, 2, 5.5, 11Mbps;
802.11g: 6, 9, 12, 18, 24, 36, 48, 54Mbps;
802.11n (HT20): MCS0~MCS7(1T1R_SISO) 6.5~72.2Mbps;
802.11n (HT20): MCS8~MCS15(2T2R_MIMO) 13~144.4Mbps;
802.11n (HT40): MCS0~MCS7(1T1R_SISO) 13.5~150Mbps;
802.11n (HT40): MCS8~MCS15(2T2R_MIMO) 27~300Mbps;
Antenna type
PCB antenna
Antenna Gain
Ant0: 6.07dBi ant1: 5.15dBi
Frequency Tolerance
≦ ±20ppm
2.4G Transmitter Specifications (Ant0/Ant1)
TX Rate
TX Power
TX Power Tolerance
EVM
802.11b@1~11Mbps
18dBm
±1.5dBm
≦-10dB
802.11g@6Mbps
16dBm
±1.5dBm
≦-10dB
802.11g@54Mbps
16dBm
±1.5dBm
≦-25dB
802.11n@HT20_MCS0
16dBm
±1.5dBm
≦-10dB
802.11n@HT20_MCS7
16dBm
±1.5dBm
≦-28dB
802.11n@HT40_MCS0
16dBm
±1.5dBm
≦-10dB
802.11n@HT40_MCS7
16dBm
±1.5dBm
≦-28dB
2.4G Receiver Specifications (Ant0/Ant1)
RX Rate
Min Input Level (Typ)
Max Input Level (Typ)
PER
802.11b@1Mbps
-93dBm
-5dBm
< 8%
802.11b@11Mbps
-87dBm
-5dBm
< 8%
802.11g@6Mbps
-91dBm
-10dBm
< 10%
802.11g@54Mbps
-73dBm
-10dBm
< 10%
802.11n@HT20_MCS0
-90dBm
-10dBm
< 10%
802.11n@HT20_MCS7
-71dBm
-10dBm
< 10%
802.11n@HT40_MCS0
-86dBm
-10dBm
< 10%
802.11n@HT40_MCS7
-68dBm
-10dBm
< 10%
4.2 5G WiFi RF Specification
Conditions: VDD=3.3V; Ta:25℃
Features
Description
WLAN Standard
IEEE 802.11a/n/ac CSMA/CA

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Frequency Range
5.15~5.25GHz; 5.25~5.35GHz; 5.47~5.725GHz;
5.725~5.85GHz (5GHz ISM Band)
Channels
Ch36, Ch40, Ch44, Ch48; Ch52~Ch64; Ch100~Ch140;
Ch149~Ch165 (For 20MHz Channels)
Modulation
802.11a (OFDM): BPSK, QPSK, 16QAM, 64QAM;
802.11n (OFDM): BPSK, QPSK, 16QAM, 64QAM;
802.11ac (OFDM): BPSK, QPSK, 16QAM, 64QAM, 256QAM;
Date Rate
802.11a: 6, 9, 12, 18, 24, 36, 48, 54Mbps;
802.11n (HT20): MCS0~MCS7(1T1R_SISO) 6.5~72.2Mbps;
802.11n (HT20): MCS8~MCS15(2T2R_MIMO) 13~144.4Mbps;
802.11n (HT40): MCS0~MCS7(1T1R_SISO) 13.5~150Mbps;
802.11n (HT40): MCS8~MCS15(2T2R_MIMO) 27~300Mbps;
802.11ac (VHT20): MCS0~MCS8(1T1R_SISO)6.5~86.7Mbps;
802.11ac (VHT20): MCS0~MCS8(2T2R_MIMO) 13~173.3Mbps;
802.11ac (VHT40):MCS0~MCS9(1T1R_SISO)13.5~200Mbps;
802.11ac (VHT40):MCS0~MCS9(2T2R_MIMO)27~400Mbps;
802.11ac (VHT80): MCS0~MCS9(1T1R_SISO)29.3~433.3Mbps;
802.11ac (VHT80): MCS0~MCS9(2T2R_MIMO)58.5~866.7Mbps;
Antenna type
PCB antenna
Antenna Gain
Ant0
5150 -5250MHz
5.02 dBi
5250-5350MHz
6.15 dBi
5470-5725MHz
8.46 dBi
5725-5850MHz
9.23 dBi
Ant1
5150 -5250MHz
6.45 dBi
5250-5350MHz
6.48 dBi
5470-5725MHz
7.26 dBi
5725-5850MHz
5.38 dBi
Frequency Tolerance
≦ ±20ppm
5G Transmitter Specifications (Ant0/Ant1)
TX Rate
TX Power
TX Power Tolerance
EVM
802.11a@6Mbps
16dBm
±2dBm
≦-10dB
802.11a@54Mbps
16dBm
±2dBm
≦-25dB
802.11n@HT20_MCS0
802.11ac@VHT20_MCS0
16dBm
±2dBm
≦-10dB

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802.11n@HT20_MCS7
802.11ac@VHT20_MCS7
16dBm
±2dBm
≦-28dB
802.11n@HT40_MCS0
802.11ac@VHT40_MCS0
16dBm
±2dBm
≦-10dB
802.11n@HT40_MCS7
802.11ac@VHT40_MCS7
16dBm
±2dBm
≦-28dB
802.11ac@VHT20_MCS8
16dBm
±2dBm
≦-30dB
802.11ac@VHT40_MCS8
802.11ac@VHT40_MCS9
16dBm
±2dBm
≦-32dB
802.11ac@VHT80_MCS0
14dBm
±2dBm
≦-10dB
802.11ac@VHT80_MCS9
14dBm
±2dBm
≦-32dB
5G Receiver Specifications (Ant0/Ant1)
RX Rate
Min Input Level(Typ)
Max Input Level(Typ)
PER
802.11a@6Mbps
-90dBm
-10dBm
< 10%
802.11a@54Mbps
-72dBm
-10dBm
< 10%
802.11n@HT20_MCS0
-89dBm
-15dBm
< 10%
802.11n@HT20_MCS7
-70dBm
-15dBm
< 10%
802.11n@HT40_MCS0
-86dBm
-15dBm
< 10%
802.11n@HT40_MCS7
-68dBm
-15dBm
< 10%
802.11ac@VHT80_MCS0
-84dBm
-15dBm
< 10%
802.11ac@VHT80_MCS9
-58dBm
-15dBm
< 10%

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5. Mechanical Specifications
5.1 Module Outline Drawing
(Top View)
Module dimension: 27.0mm*17.8mm*3.1mm （L*W*H , Tolerance: ±0.15mm）
IPEX connector dimension: 2.6*3.0*1.2mm (L*W*H, Ø2.0mm)