Details

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BUY ICL7135CPIZ https://www.utsource.net/itm/p/4547662.html
4 1/2 Digit, BCD Output, A/D Converter

Parameter	Description	Min	Typ	Max	Unit
Supply Voltage (V+)	Operating supply voltage range	4.0	-	36	V
Reference Voltage (Vref)	Internal reference voltage	2.048	-	-	V
Input Voltage Range	Maximum input voltage range	-10	-	+10	V
Input Bias Current	Typical input bias current at 25°C	-	20	-	nA
Zero Offset Voltage	Typical zero offset voltage at 25°C	-	5	-	mV
Common-Mode Rejection Ratio (CMRR)	Typical CMRR at 50/60 Hz	-	90	-	dB
Power Consumption	Total power consumption	-	30	-	mW
Operating Temperature Range	Temperature range for operation	-40	-	85	°C
Storage Temperature Range	Temperature range for storage	-65	-	150	°C

Instructions for Using ICL7135CPIZ:

1. Power Supply:

   • Ensure the supply voltage (V+) is within the range of 4.0V to 36V.
   • Connect the positive supply to V+ and the negative supply to V-.

2. Reference Voltage:

   • The internal reference voltage is 2.048V. For external reference, connect the reference voltage to the REF+ and REF- pins.

3. Input Connections:

   • Connect the input signal to the IN+ and IN- pins. The input voltage range should be between -10V and +10V.
   • Use a differential input configuration for best performance.

4. Bias Current:

   • The typical input bias current is 20nA. Use high impedance sources or buffer the input signals if necessary.

5. Zero Offset:

   • The typical zero offset voltage is 5mV. Calibrate the circuit if high accuracy is required.

6. Common-Mode Rejection:

   • The typical CMRR is 90dB at 50/60Hz. Use proper shielding and grounding to minimize common-mode interference.

7. Power Consumption:

   • The total power consumption is typically 30mW. Ensure adequate heat dissipation if operating at higher temperatures or with higher supply voltages.

8. Operating and Storage Temperature:

   • Operate the device within the temperature range of -40°C to 85°C.
   • Store the device within the temperature range of -65°C to 150°C.

9. Handling:

   • Handle the device with care to avoid static damage. Use proper ESD protection when handling the IC.

10. Testing:

    • Before finalizing the design, test the circuit under various conditions to ensure stability and accuracy.

(For reference only)