ADC0838

Features:

NSC MICROWIRE compatible-direct interface to COPS family processors
Easy interface to all microprocessors, or operates "stand-alone"
Operates ratiometrically or with 5 V_DC voltage reference
No zero or full-scale adjust required
2-, 4- or 8-channel multiplexer options with address logic
Shunt regulator allows operation with high voltage supplies
0V to 5V input range with single 5V power supply
Remote operation with serial digital data link
TTL/MOS input/output compatible
0.3" standard width, 8-, 14- or 20-pin DIP package
20 Pin Molded Chip Carrier Package (ADC0838 only)
Surface-Mount Package




Pinout






Specifications

Current into V⁺ (Note 3) 15 mA
Supply Voltage, V_CC (Note 3) 6.5V
Voltage
Logic Inputs −0.3V to V_CC + 0.3V
Analog Inputs −0.3V to V_CC + 0.3V
Input Current per Pin (Note 4) ±5mA
Package ±20 mA
Storage Temperature−65˚C to +150˚C
Package Dissipation
at TA=25˚C (Board Mount)0.8W

Resolution	8 bits
Input Channels	8
Interface Type	Microwire (Serial I/O)
Differential Input	Yes
Max KSample Rate	31 ksps
Min Supply Voltage	4.5 Volt
Max Supply Voltage	6.3 Volt
Reference Source	External
Temperature Min	-40 deg C
Temperature Max	85 deg C
Power Down	No
Input Sample/Hold	No
Special Features	Total unadjusted error is +/-1.0 LSB
Data Converter Type	ADC
Max Sample Rate	0.031 MSPS
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Description

The ADC0831 series are 8-bit successive approximation A/D converters with a serial I/O and configurable input multiplexers with up to 8 channels. The serial I/O is configured to comply with the NSC MICROWIRE™ serial data exchange standard for easy interface to the COPS™ family of processors, and can interface with standard shift registers or µPs. The 2-, 4- or 8-channel multiplexers are software configured for single-ended or differential inputs as well as channel assignment.

The differential analog voltage input allows increasing the common-mode rejection and offsetting the analog zero input voltage value. In addition, the voltage reference input can be adjusted to allow encoding any smaller analog voltage span to the full 8 bits of resolution.

The ADC0831 series are 8-bit successive approximation A/D converters with a serial I/O and configurable input multiplexers with up to 8 channels. The serial I/O is configured to comply with the NSC MICROWIRE™ serial data exchange standard for easy interface to the COPS™ family of processors, and can interface with standard shift registers or µPs.

The 2-, 4- or 8-channel multiplexers are software configured for single-ended or differential inputs as well as channel assignment.

The differential analog voltage input allows increasing the common-mode rejection and offsetting the analog zero input voltage value. In addition, the voltage reference input can be adjusted to allow encoding any smaller analog voltage span to the full 8 bits of resolution.

Reliability Metrics

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Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
ADC0838CCN	CMOS	0	18680	0	0	2425000	2	688100371
ADC0838CCWM	CMOS	0	18680	0	0	2425000	2	688100371
ADC0838CCWMX	CMOS	0	18680	0	0	2425000	2	688100371
ADC0838CIWM	CMOS	0	18680	0	0	2425000	2	688100371
ADC0838CIWMX	CS200*	0	9850	0	0	3375000	2	957665465

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

Application Notes

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Title	Size in Kbytes	Date
AN-280: AN-280 A/D Converters Easily Interface with 70 Series Microprocessors	134 Kbytes	4-Oct-04	Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

More Application Notes

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Title	Size in Kbytes	Date
AN-281: AN-281 Data Acquisition Using INS8048	129 Kbytes	4-Oct-04	Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.