The MIC842 incorporates a voltage reference and comparator with fixed internal hysteresis; two external resistors are
used to set the switching threshold voltage.
Supply current is extremely low (1.5 μA, typical), making it ideal for portable applications.
The MIC842 is supplied in 4-pin 1.2 mm × 1.6 mm Thin DFN package. For more information, refer to the
Figure 4-16. Voltage Threshold Detector Schematic
GND
VDD_MAIN
GND
INT_MIC842_PD31
100k
0201
R27
VTH
VDDANA
GND 2
INP
3
OUT 1
VDD
4
EP
EP
MIC842NYMT-T5
U5
GND
0.1uF
6.3V
0201
C94
100R
0201
1%
R57
100pF
25V
0201
C104
GND
Figure 4-17. Voltage Threshold Detector Implementation Example
GND
VDD_MAIN
GND
INT_MIC842_PD31
100k
0201
R27
VDDANA
GND 2
INP
3
OUT 1
VDD
4
EP
EP
MIC842NYMT-T5
U5
GND
0.1uF
6.3V
0201
C94
100R
0201
1%
R57
100pF
25V
0201
C104
GND
GND
Rext1
V_SUPPLY
Rext2
VTH
Application Board
WLSOM1 Module
Table 4-3. Output Resistor Ladder Values and Input System Supply Example
System Supply Voltage
Threshold Detection Value
Rext1 Value
Rext2 Value
5V
4.64V
787 kΩ
287 kΩ
12V
11V
787 kΩ
100 kΩ
24V
21.78V
787 kΩ
47.5 kΩ
48V
39.51V
787 kΩ
25.5 kΩ
4.5
Radio Subsystem
The ATSAMA5D27-WLSOM1 embeds an ATWILC3000-MR110UA module, which uses a single chip IEEE 802.11
b/g/n RF/Baseband/MAC link controller and Bluetooth 5. The ATWILC3000 connects to Microchip MPUs, with
minimal resource requirements with simple SDIO-to-Wi-Fi and UART-to-Bluetooth interfaces.
The ATWILC3000-MR110UA supports single stream 1x1 802.11n mode, providing tested throughput of up to 46
Mbps UDP & 28 Mbps TCP/IP. The ATWILC3000-MR110UA features fully integrated power amplifier, LNA, switch
and power management. Implemented in low-power CMOS technology, the ATWILC3000-MR110UA offers very low
power consumption while simultaneously providing high performance and minimal bill of materials.
SAMA5D27 Wireless SOM1
Functional Description
©
2021 Microchip Technology Inc.
and its subsidiaries
Complete Datasheet
DS60001590D-page 32
