Initial testing confirms total supply current draw (power consumption) is less than 0.3mA, allowing a single CR2032
battery to last up to 600 hours. While testing, one of our multimeters was discovered to produce a large amount of
noise when on the µA setting and we are looking into this.
Calibration is unnecessary as there is no part to calibrate; however, it is suggested that it be powered on for a few
minutes to allow the circuit to stabilize before attaching a load.
There was an error with the identification and license not being on the correct layer, and is missing from the
prototype batch of PCBs. This may not make it to production, but there are plans to improve the range and overall
accuracy. Overall, the MicroCC performs better than expected, and any improvements would include adding a
precision analog microcontroller and the ability to go all the way down to null current.
2
Rev. 1.0
AN841
1.1. Parts List
1k, 0.1% resistors – this is the load, the higher tolerance parts allows confident readings with a
standard volt meter.
TSM6025AEUR+: A 2.5V precision voltage reference. For improved tempco performance, the
TSM6025AEUR+ could be replaced with a TS6001AIG325 or TS6001BIG325.
TS1001IJ5: A 0.8V/0.65µA super low power op amp.
T1: FMMTA14TA – NPN Darlington transistor, the maximum collector cutoff current is 100 nA, most will be
lower than this.
R7: 89PR10KLF – a 20-turn trimmer, allows finer control of current vs. a single turn pot.
BK-883-TR CR2032 coin cell holder.
C2-C5: 1nF ceramic capacitors
R1: 1kto 10k resistor, for the base of the transistor
Unfortunately, our instruments do not have sufficient resolution and are plagued by a noisy environment to even be
able to fully characterize the operating conditions more accurately.
The MicroCC is licensed CC-BY.
This document is licensed under the Creative Commons CC BY-SA v3.0:
http://creativecommons.org/licenses/by-sa/3.0/
The license chosen for the hardware:
http://creativecommons.org/licenses/by/3.0/us/
For additional information, contact Silicon Labs.
R3–R5:
Rev. 1.0
3
Smart.
Connected.
Energy-Friendly
Products
www.silabs.com/products
Quality
www.silabs.com/quality
Support and Community
community.silabs.com
Disclaimer
Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers
using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific
device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories
reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy
or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply
or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products must not be used within any Life Support System without the specific
written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected
to result in significant personal injury or death. Silicon Laboratories products are generally not intended for military applications. Silicon Laboratories products shall under no
circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons.
Trademark Information
Silicon Laboratories Inc., Silicon Laboratories, Silicon Labs, SiLabs and the Silicon Labs logo, CMEMS®, EFM, EFM32, EFR, Energy Micro, Energy Micro logo and combinations
thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZMac®, EZRadio®, EZRadioPRO®, DSPLL®, ISOmodem ®, Precision32®, ProSLIC®, SiPHY®,
USBXpress® and others are trademarks or registered trademarks of Silicon Laboratories Inc. ARM, CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of
ARM Holdings. Keil is a registered trademark of ARM Limited. All other products or brand names mentioned herein are trademarks of their respective holders.
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
