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BUY AD7715ARZ-5 https://www.utsource.net/itm/p/702493.html
The AD7715 is a complete analog front end for low frequency measurement applications. The part can accept low level input signals directly from a transducer and outputs a serial digital word. It employs a ?-? conversion technique to realize up to 16 bits of no missing codes performance. The input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via the on-chip control register allowing adjustment of the filter cutoff and output

Below is the parameter table and instructions for the AD7715ARZ-5, a 24-bit sigma-delta analog-to-digital converter (ADC) from Analog Devices.

AD7715ARZ-5 Parameter Table

Parameter	Symbol	Min	Typ	Max	Unit
Supply Voltage	VDD	2.7		5.25	V
Reference Voltage	VREF	2.5		5.0	V
Input Range		-VREF		+VREF	V
Resolution			24		bits
Conversion Rate	fCONV	10		100	Hz
Signal-to-Noise Ratio (SNR)	SNR		110		dB
Total Harmonic Distortion	THD		-110		dB
Power Consumption	IDD		3.5		mA
Operating Temperature Range		-40		+85	°C
Storage Temperature Range		-65		+150	°C
Package Type			24-lead		SSOP

Instructions for Using AD7715ARZ-5

1. Power Supply and Grounding:

   • Connect the VDD pin to a stable power supply between 2.7V and 5.25V.
   • Ensure a good ground connection by connecting the GND pin to the system ground.
   • Use decoupling capacitors (typically 0.1μF and 10μF) close to the VDD and GND pins to filter out noise.

2. Reference Voltage:

   • Connect the VREF pin to a precision reference voltage between 2.5V and 5.0V.
   • The input range of the ADC will be ±VREF.

3. Analog Inputs:

   • Connect the analog signals to the AIN1, AIN2, AIN3, and AIN4 pins.
   • The inputs can be configured for single-ended or differential mode using the control register.

4. Digital Interface:

   • The AD7715ARZ-5 uses a serial interface (SPI) for communication.
   • Connect the SCLK (Serial Clock), DIN (Data In), DOUT (Data Out), and CS (Chip Select) pins to the microcontroller or processor.
   • Set the appropriate SPI mode (CPOL and CPHA) as specified in the datasheet.

5. Configuration:

   • Write to the control registers to configure the ADC settings such as input range, conversion rate, and filter settings.
   • Use the command register to initiate conversions and read data.

6. Data Conversion:

   • Start a conversion by writing to the start register.
   • Read the conversion result from the data register using the DOUT pin.

7. Power Management:

   • The AD7715ARZ-5 has a power-down mode to reduce power consumption when not in use.
   • Enter power-down mode by setting the appropriate bit in the control register.

8. Calibration:

   • Perform system calibration to ensure accurate measurements.
   • Use the internal calibration registers to adjust the offset and gain.

9. Error Handling:

   • Monitor the status register for any errors or warnings.
   • Handle errors by reconfiguring the ADC or resetting the device.

10. Layout Considerations:

    • Place the AD7715ARZ-5 close to the analog signal sources to minimize noise.
    • Use shielded cables for long-distance analog signal connections.
    • Keep digital and analog grounds separate and connect them at a single point near the ADC.

For detailed information, refer to the AD7715ARZ-5 datasheet available from Analog Devices.

(For reference only)