ADC-dat

• DAC-dat

normally from - op-amp-dat, ADC-dat can be on MCU-dat

• ADC-bat-monitor-dat - voltage-divider-dat

• not this is chip Analog-device-dat

• sensor-analog-dat - sensor-dat

• codec-audio-dat - codec-dat - I2S-dat

• ADC-dat - ADC-RECORD-dat - DAC-dat - DAC-PLAYBACK-dat

relevant boards

• NWI1119-dat

• SSL1071-dat - SSL1072-dat == Load Cell Amplifier, Weight Sensor Kit, HX711 [KG] - HX711-dat

• ADC-DAT - DAC-dat - IO-expander-dat

• MSP1064-dat - PCF8591-dat

• MPC1101-dat - RPI-SBC-dat

apps to build

• sensor-analog-dat

• sensor-temperature-dat - sensor-light-dat

• sensor-voltage-dat

SCH

ADC with measure MOSFET control

• transistor-dat - mosfet-dat

• voltage-divider-dat

• ESP32-ADC-dat

1. ADC Ctrl LOW (0V):

   • Q8 is OFF (no base current).
   • The gate of Q7 is pulled up to VBAT via R30.
   • Q7 (P-MOSFET) is OFF (Vgs ≈ 0V).
   • No voltage is present at BAT_ADC; the voltage divider is disconnected from VBAT.
   • ADC input is isolated (saves power, prevents leakage).

2. ADC Ctrl HIGH (e.g., 3.3V or 5V):

   • Q8 is ON (base current flows via R9/R25).
   • Q8 pulls the gate of Q7 towards GND through R31.
   • Vgs of Q7 becomes negative (gate lower than source), turning Q7 ON.
   • VBAT is now connected to the voltage divider (R32/R33).
   • The divided voltage appears at BAT_ADC for ADC measurement.

Purpose

• Power Saving: Only connects the voltage divider to the battery when ADC measurement is needed, reducing continuous current drain.
• Control: Allows the microcontroller to enable/disable battery voltage sensing.

Summary Table

ADC Ctrl	Q8 (NPN)	Q7 (P-MOSFET)	BAT_ADC Output
LOW	OFF	OFF	Disconnected (0V)
HIGH	ON	ON	Battery voltage via divider

---

In summary:
ADC Ctrl enables or disables the battery voltage divider connection to the ADC

2x mosfet 2x ADC measurement

4x ADC reader

• LM224-dat - TI-interface-dat

• BAT54S-dat

chips

• HX711-dat

• TI-ADC-dat - TI-dat

• AD-ADC-dat - analog-device-dat

• cirrus-dat - CS553x-dat

• CS1237-dat - ADC-dat - chipsea-dat

chips

• INA219-dat - INA226-dat

• ADS1100-dat

• AD7606
• AD7799

• AD7880 == LC2 MOS Single +5 V Supply, Low Power, 12-Bit Sampling ADC

• ADS7822-dat - 12-Bit, 200 kSPS, SPI Interface, Micro Power, Single Supply, Rail-to-Rail I/O ADC with Internal Reference

• AD9224ARSZ - 12 Bit Analog to Digital Converter 1 Input 1 Pipelined 28-SSOP

• microchip-ADC-dat - microchip-dat

other chips

• ADS7046 12-Bit, 3-MSPS, Single-Ended Input, Small-Size, Low-Power SAR ADC

• ADS1015

• AD9854ASTZ == CMOS 300 MSPS Quadrature Complete DDS == Data Acquisition ADCs/DACs - Specialized 200 MHZ QUADRATURE DDS SYNTHESIZER PBFre ==

• AD8561ARZ

• AD7864 == 4-Channel, Simultaneous Sampling, High Speed, 12-Bit ADC

• maxim-dat - MAX196/MAX198 - Multirange, Single +5V, 12-Bit DAS with 12-Bit Bus Interface

• renesas-dat

• analog-device-dat

AD7366/AD7367 - True Bipolar Input, Dual 12-Bit/14-Bit, 2-Channel, Simultaneous Sampling SAR ADC

HEXINHULIAN CL1606 - LQFP-64 Analog to Digital Converters (ADC) RoHS

ref

• tech-dat