
Low Power Desktop Weather Station
jobitjoseph/Desktop-Weather-Station
This project offers a practical way to build a clean and minimal weather station using an ESP32 microcontroller and an E-Ink display.

Analog Devices
-40℃~+125℃ 1 105uA 3.3V 5.5V 500mA 55uVrms 60dB@(100kHz) Fixed Over Current Protection、Over Temperature Protection、Enable、Short Circuit Protection Positive LFCSP-8(2x2) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS
The ADP124ACPZ-3.3-R7 is a voltage Regulators Linear, Low Drop Out (LDO) Regulator made by Analog Devices in a LFCSP-8(2x2) package with 9 pins. -40℃~+125℃ 1 105uA 3.3V 5.5V 500mA 55uVrms 60dB@(100kHz) Fixed Over Current Protection、Over Temperature Protection、Enable、Short Circuit Protection Positive LFCSP-8(2x2) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS.
PCBKit's library has its KiCad symbol (agg-kicad:ADP124, from Agg-kicad) and its footprint (agg:MSOP-8-EP-AD, from Agg-kicad), ready for a KiCad board. 1,999 are in stock at JLCPCB (part C658731). 3 open-source boards in 2 repositories on GitHub use it.
| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| INPUT VOLTAGE RANGE VIN | min 2.3 · max 5.5 V | 3 | |
| OPERATING SUPPLY CURRENT IGND | IOUT = 0 uA | typ 45 uA | 3 |
| OPERATING SUPPLY CURRENT IGND | IOUT = 0 uA, TJ = −40°C to +125°C | max 105 uA | 3 |
| OPERATING SUPPLY CURRENT IGND | IOUT = 1 mA | typ 60 uA | 3 |
| OPERATING SUPPLY CURRENT IGND | IOUT = 1 mA, TJ = −40°C to +125°C | max 120 uA | 3 |
| OPERATING SUPPLY CURRENT IGND | IOUT = 250 mA | typ 160 uA | 3 |
| OPERATING SUPPLY CURRENT IGND | IOUT = 250 mA, TJ = −40°C to +125°C | max 210 uA | 3 |
| OPERATING SUPPLY CURRENT IGND | IOUT = 500 mA | typ 210 uA | 3 |
| OPERATING SUPPLY CURRENT IGND | IOUT = 500 mA, TJ = −40°C to +125°C | max 280 uA | 3 |
| SHUTDOWN CURRENT ISD | EN = GND | typ 0.1 uA | 3 |
| SHUTDOWN CURRENT ISD | EN = GND, TJ = −40°C to +125°C | max 1 uA | 3 |
| OUTPUT VOLTAGE ACCURACY, Fixed Output VOUT | ADP124; IOUT = 10 mA | min -1 · max 1 % | 3 |
| OUTPUT VOLTAGE ACCURACY, Fixed Output VOUT | ADP124; 100 uA < IOUT < 500 mA, VIN = (VOUT + 0.5 V) to 5.5 V, TJ = −40°C to +125°C | min -2 · max 1.5 % | 3 |
| LINE REGULATION ∆VOUT/∆VIN | VIN = VIN = 2.3 V to 5.5 V, TJ = −40°C to +125°C | min -0.05 · max 0.05 %/V | 3 |
| LOAD REGULATION ∆VOUT/∆IOUT | IOUT = 1 mA to 500 mA | typ 0.0005 %/mA | 3 |
| LOAD REGULATION ∆VOUT/∆IOUT | IOUT = 1 mA to 500 mA, TJ = −40°C to +125°C | max 0.001 %/mA | 3 |
| DROPOUT VOLTAGE VDROPOUT | IOUT = 10 mA, VOUT > 2.3 V | typ 3 mV | 3 |
| DROPOUT VOLTAGE VDROPOUT | IOUT = 10 mA, TJ = −40°C to +125°C; VOUT > 2.3 V | max 5 mV | 3 |
| DROPOUT VOLTAGE VDROPOUT | IOUT = 250 mA, VOUT > 2.3 V | typ 65 mV | 3 |
| DROPOUT VOLTAGE VDROPOUT | IOUT = 250 mA, TJ = −40°C to +125°C; VOUT > 2.3 V | max 120 mV | 3 |
| DROPOUT VOLTAGE VDROPOUT | IOUT = 500 mA, VOUT > 2.3V | typ 130 mV | 3 |
| DROPOUT VOLTAGE VDROPOUT | IOUT = 500 mA, TJ = −40°C to +125°C; VOUT > 2.3 V | max 230 mV | 3 |
| START-UP TIME tSTART-UP | VOUT = 3.0 V | typ 350 us | 3 |
| CURRENT LIMIT THRESHOLD ILIMIT | min 550 · typ 750 · max 1000 mA | 3 | |
| Thermal Shutdown Threshold TSSD | TJ rising | typ 150 °C | 3 |
| Thermal Shutdown Hysteresis TSSD-HYS | typ 15 °C | 3 | |
| EN Input Logic High VIH | 2.3 V ≤ VIN ≤ 5.5 V | min 1.2 V | 3 |
| EN Input Logic Low VIL | 2.3 V ≤ VIN ≤ 5.5 V | max 0.4 V | 3 |
| EN Input Leakage Current VI-LEAKAGE | EN = VIN or GND | typ 0.1 uA | 3 |
| EN Input Leakage Current VI-LEAKAGE | EN = VIN or GND, TJ = −40°C to +125°C | max 1 uA | 3 |
| Input Voltage Rising UVLORISE | TJ = −40°C to +125°C | max 2.1 V | 3 |
| Input Voltage Falling UVLOFALL | TJ = −40°C to +125°C | min 1.5 V | 3 |
| Hysteresis UVLOHYS | TA = 25°C | typ 125 mV | 3 |
| OUTPUT NOISE OUTNOISE | 10 Hz to 100 kHz, VIN = 5.5 V, VOUT = 3.3 V | typ 55 uV rms | 4 |
| POWER SUPPLY REJECTION RATIO PSRR | VIN = VOUT +1V; 10 kHz to 100 kHz, VOUT = 3.3 V | typ 60 dB | 4 |
| Minimum Input and Output Capacitance CAPMIN | TA = −40°C to +125°C | min 0.7 uF | 4 |
| Capacitor ESR RESR | TA = −40°C to +125°C | min 0.001 · max 1 Ω | 4 |
| VIN to GND | min -0.3 · max 6.5 V | 5 | |
| EN to GND | min -0.3 · max 6.5 V | 5 | |
| VOUT to GND | Upper rating is VIN | min -0.3 V | 5 |
| Storage Temperature Range | min -65 · max 150 °C | 5 | |
| Operating Ambient Temperature Range | min -40 · max 85 °C | 5 | |
| Operating Junction Temperature Range | min -40 · max 125 °C | 5 | |
| 8-Lead LFCSP θJA | Device soldered in a circuit board; 4-layer board; worst-case conditions | max 68.9 °C/W | 5 |
| Pin | Name | Type |
|---|---|---|
| 1 | VOUT | Power out |
| 2 | VOUT | Power out |
| 3 | SENSE | Input |
| 4 | GND | Power in |
| 5 | EN | Input |
| 6 | NC | Not connected |
| 7 | VIN | Power in |
| 8 | VIN | Power in |
| EP | GND | Power in |

jobitjoseph/Desktop-Weather-Station
This project offers a practical way to build a clean and minimal weather station using an ESP32 microcontroller and an E-Ink display.


<iframe src="https://pcbkit.io/embed/parts/adi/ADP124ACPZ-3.3-R7" title="ADP124ACPZ-3.3-R7 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/adi/ADP124ACPZ-3.3-R7.jpg" alt="ADP124ACPZ-3.3-R7" width="1200" height="900">[](https://pcbkit.io/parts/adi/ADP124ACPZ-3.3-R7)Yes. The symbol is agg-kicad:ADP124 and the footprint agg:MSOP-8-EP-AD, both drawn on this page. PCBKit places them on a board for you when you design with it.
LFCSP-8(2x2), with 9 pins. Its footprint is drawn on this page.
Analog Devices publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C658731, with 1,999 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the ADP124ARHZ-3.3-R7 by Analog Devices, the AMS1117-3.3 by Advanced Monolithic Systems, the AMS1117-3.3 by UMW and the ME6211C33M5G-N by MICRONE. Check their datasheets: a part that fits the footprint may still differ in its ratings.
3 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.