Details

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BUY MCP3208-BI/SL https://www.utsource.net/itm/p/6397455.html
2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI? Serial Interface

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VDD	Operating	4.5	-	5.5	V
Supply Current	IDD	All channels off	150	-	300	μA
Input Voltage Range	VIN	Differential	0	-	VDD	V
Conversion Time	tCONV	Single-ended, 100 kSPS	-	62.5	-	μs
Resolution	RES	-	-	12	-	bits
Differential Nonlinearity	DNL	-	-1	-	+1	LSB
Integral Nonlinearity	INL	-	-2	-	+2	LSB
Input Bias Current	IB	-	-	20	-	nA
Output Data Rate	fOUT	-	10	-	100	kSPS

Instructions for Using the MCP3208-BI/SL

1. Power Supply:

   • Connect the VDD pin to a 4.5V to 5.5V power supply.
   • Connect the GND pin to the ground.

2. Clock Input (SCK):

   • Connect the SCK pin to the clock signal from your microcontroller. The clock frequency should be between 10 kHz and 1 MHz.

3. Chip Select (CS):

   • Connect the CS pin to the chip select signal from your microcontroller. This pin must be pulled low to initiate a conversion.

4. Data Input (DIN):

   • Connect the DIN pin to the data output of your microcontroller. This pin is used to send commands to the ADC.

5. Data Output (DOUT):

   • Connect the DOUT pin to the data input of your microcontroller. This pin provides the converted data.

6. Conversion Process:

   • To start a conversion, bring the CS pin low.
   • Send a start bit (1) followed by the configuration bits (3 bits) to select the channel and mode (single-ended or differential).
   • The ADC will then perform the conversion and send the result back on the DOUT pin.
   • After receiving the data, bring the CS pin high to end the conversion.

7. Configuration Bits:

   • Bit 7: Start bit (always 1)
   • Bits 6-5: Single/Differential selection (00 for single-ended, 01 for differential)
   • Bit 4: Channel selection (0 for CH0, 1 for CH1, etc.)
   • Bits 3-0: Reserved (always 0)

8. Example Configuration:

   • To read from CH0 in single-ended mode:
     • Send 00011000 (0x18 in hexadecimal) to the DIN pin.
   • The ADC will respond with 12-bit data on the DOUT pin.

9. Reading the Data:

   • The ADC will send 16 bits of data, but only the first 12 bits are valid.
   • The first bit is a null bit, followed by the 12-bit data, and the last three bits are also null.

10. Error Handling:

    • Check the DNL and INL specifications to ensure accurate readings.
    • If the readings are not as expected, verify the connections and the clock signal.

By following these instructions, you can effectively use the MCP3208-BI/SL for analog-to-digital conversion in your projects.

(For reference only)