Details

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BUY ADS1255IDBT https://www.utsource.net/itm/p/11704851.html
IC ADC 24BIT SIGMA-DELTA 20SSOP

Parameter	Description	Min	Typ	Max	Unit
Supply Voltage (VDD)	Operating supply voltage range	2.7	-	5.25	V
Supply Current (IDD)	Active mode supply current	-	400	-	μA
Output Data Rate (ODR)	Output data rate range	0.1	-	860	SPS
Input Range	Differential input voltage range	-	2.5	-	V
Common-Mode Input Voltage Range	Common-mode input voltage range	0	-	VREF	V
Resolution	ADC resolution	-	24	-	bits
INL (Integral Nonlinearity)	Maximum integral nonlinearity	-	±2	-	LSB
DNL (Differential Nonlinearity)	Maximum differential nonlinearity	-	±1	-	LSB
SNR (Signal-to-Noise Ratio)	Signal-to-noise ratio at 10 SPS	-	110	-	dB
THD (Total Harmonic Distortion)	Total harmonic distortion at 10 SPS	-	-110	-	dB
Power-Down Mode Current	Current in power-down mode	-	0.5	-	μA
Operating Temperature Range	Operating temperature range	-40	-	85	°C
Storage Temperature Range	Storage temperature range	-65	-	150	°C

Instructions for Using the ADS1255IDBT

1. Power Supply:

   • Connect the VDD pin to a stable power supply within the range of 2.7V to 5.25V.
   • Ensure the power supply has adequate decoupling capacitors (typically 0.1μF and 10μF) placed close to the VDD pin.

2. Grounding:

   • Connect the GND pin to the system ground. Ensure a clean and stable ground reference.

3. Input Configuration:

   • Connect the differential input signals to the AINP and AINN pins.
   • The common-mode input voltage should be within the range of 0V to VREF.

4. Output Data Rate (ODR):

   • Set the desired output data rate using the configuration registers. The ODR can range from 0.1 SPS to 860 SPS.

5. Configuration Registers:

   • Use the SPI interface to configure the ADS1255IDBT. Refer to the datasheet for specific register addresses and bit configurations.
   • Key registers include the Control Register, Configuration Register, and Data Register.

6. Reading Data:

   • Initiate a conversion by writing to the appropriate register or by setting the start conversion bit.
   • Read the conversion result from the Data Register via the SPI interface.

7. Power-Down Mode:

   • To reduce power consumption, enter the power-down mode by writing to the appropriate register.
   • In power-down mode, the device consumes approximately 0.5μA.

8. Temperature Considerations:

   • Ensure the operating temperature is within the specified range of -40°C to 85°C.
   • For storage, keep the device within the range of -65°C to 150°C.

9. Decoupling and Layout:

   • Place decoupling capacitors as close as possible to the power pins to minimize noise.
   • Use a ground plane to provide a low-impedance path for return currents.

10. SPI Communication:

    • Ensure proper SPI communication settings, including clock polarity, phase, and data rate.
    • Refer to the datasheet for detailed SPI timing diagrams and protocol specifications.

For more detailed information, refer to the ADS1255IDBT datasheet and application notes provided by Texas Instruments.

(For reference only)