Details

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BUY AD7870KPZ https://www.utsource.net/itm/p/696858.html
ADC, SUCCESSIVE APPROXIMATION, 1

Parameter	Symbol	Min	Typ	Max	Unit	Description
Supply Voltage	VDD	4.75	5	5.25	V	Power supply voltage
Supply Current (Active)	IDD	-	35	-	mA	Supply current in active mode
Supply Current (Standby)	IDD	-	1	-	μA	Supply current in standby mode
Input Voltage Range	VIN	0	-	VDD	V	Input voltage range
Analog Input Impedance	Zin	-	1	-	MΩ	Analog input impedance
Conversion Time	tconv	-	10	-	μs	Time to complete one conversion
Resolution	N	-	12	-	bits	Number of bits in the ADC output
Differential Nonlinearity	DNL	-	±1	-	LSB	Maximum deviation from ideal step size
Integral Nonlinearity	INL	-	±2	-	LSB	Maximum deviation from ideal transfer function
Signal-to-Noise Ratio	SNR	-	70	-	dB	Ratio of signal power to noise power
Power-down Mode	PD	-	-	-	-	Enters low-power mode to reduce power consumption
Operating Temperature	Toper	-40	-	85	°C	Temperature range for normal operation
Storage Temperature	Tstg	-65	-	150	°C	Temperature range for storage

Instructions

1. Power Supply:

   • Connect the VDD pin to a 5V power supply.
   • Ensure the supply voltage is within the specified range (4.75V to 5.25V).

2. Ground Connection:

   • Connect the GND pin to the system ground.

3. Analog Inputs:

   • Connect the analog signals to the appropriate input pins (AIN0 to AIN7).
   • Ensure the input voltage is within the range of 0V to VDD.

4. Digital Interface:

   • Use the digital control pins (CS, WR, RD, D0-D7) to interface with the microcontroller or other digital devices.
   • Follow the timing diagrams provided in the datasheet for proper communication.

5. Power-down Mode:

   • To enter power-down mode, set the PD bit in the control register.
   • This reduces the power consumption significantly but disables the ADC.

6. Conversion Start:

   • Initiate a conversion by setting the appropriate control register bits.
   • Wait for the conversion time (typically 10 μs) before reading the result.

7. Reading the Result:

   • After the conversion is complete, read the result from the data register using the digital interface.
   • The result will be a 12-bit value representing the analog input.

8. Temperature Considerations:

   • Ensure the operating temperature is within the specified range (-40°C to 85°C).
   • Store the device within the storage temperature range (-65°C to 150°C).

9. Calibration:

   • Perform periodic calibration to maintain accuracy, especially if the device is used in environments with significant temperature variations.

10. Handling:

    • Handle the device with care to avoid static discharge and physical damage.
    • Follow standard ESD (Electrostatic Discharge) precautions when handling the device.

(For reference only)