Details

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BUY AD7874AN https://www.utsource.net/itm/p/101231.html
LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VDD	Operating	4.5	5.0	5.5	V
Supply Current	IDD	All channels active	-	1.2	-	mA
Conversion Time	tCONV	16-bit conversion	-	130	-	μs
Input Range	VIN	Differential	0	-	VREF	V
Reference Voltage	VREF	External	2.5	-	5.0	V
Differential Nonlinearity	DNL		-1	0	+1	LSB
Integral Nonlinearity	INL		-2	0	+2	LSB
Offset Error	VOFF		-2	0	+2	mV
Gain Error	VGA		-1	0	+1	%FSR
Signal-to-Noise Ratio	SNR	@ VREF = 5V	-	90	-	dB
Power-down Current	IDD(PD)	Power-down mode	-	1	-	μA
Operating Temperature	Toper	Industrial	-40	-	85	°C

Instructions for Using AD7874AN

1. Power Supply:

   • Connect the supply voltage (VDD) to a stable 5V source.
   • Ensure the supply current (IDD) does not exceed 1.2mA during operation.

2. Reference Voltage:

   • Connect the reference voltage (VREF) to an external reference between 2.5V and 5.0V.
   • The input range (VIN) is differential and should be within 0 to VREF.

3. Conversion:

   • Initiate a conversion by setting the appropriate control signals.
   • The conversion time (tCONV) is typically 130 μs for a 16-bit conversion.

4. Linearity and Accuracy:

   • Monitor the differential nonlinearity (DNL) and integral nonlinearity (INL) to ensure they remain within ±1 LSB and ±2 LSB, respectively.
   • Check the offset error (VOFF) and gain error (VGA) to ensure they are within ±2 mV and ±1% FSR, respectively.

5. Signal-to-Noise Ratio:

   • For optimal performance, ensure the signal-to-noise ratio (SNR) is at least 90 dB when using a 5V reference.

6. Power Management:

   • To reduce power consumption, use the power-down mode where the current (IDD(PD)) drops to approximately 1 μA.

7. Temperature Range:

   • Operate the device within the industrial temperature range of -40°C to 85°C.

8. Handling and Storage:

   • Handle the device with care to avoid static damage.
   • Store the device in a dry environment to prevent moisture-related issues.

For detailed specifications and additional information, refer to the AD7874AN datasheet provided by Analog Devices.

(For reference only)