ADC0834CCN Equivalent & Substitute Parts

Part Overview

The ADC0834CCN is an 8-bit analog-to-digital converter manufactured by Texas Instruments, designed for data acquisition applications requiring multi-channel input capability. This component features a successive approximation register (SAR) architecture with 2 or 4 selectable input channels, SPI serial data interface, and external voltage reference configuration. The part is classified as obsolete, making equivalent substitute components necessary for ongoing production, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

ADC0834CCN

Texas InstrumentsIn Stock: 1447ADC0834CCN Datasheet

Current PartRFQ

ADC0834CCN/NOPB

National SemiconductorIn Stock: 9961ADC0834CCN/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADC0834CCN is determined by strict equivalence across the following critical parameters:

• Resolution: 8-bit conversion capability
• Sampling Rate: 31.25k samples per second
• Channel Configuration: 2 or 4 input channels with multiplexed selection
• Input Modes: Support for differential, pseudo-differential, and single-ended inputs
• Serial Interface: SPI-compatible data communication protocol
• Converter Architecture: SAR topology
• Reference Configuration: External voltage reference requirement
• Supply Voltage Ranges: Analog and digital supplies both 4.5V ~ 6.3V
• Temperature Range: -40°C ~ 85°C operational specification
• Package: 14-DIP through-hole form factor with 0.300" (7.62mm) pitch

The ADC0834CCN/NOPB qualifies as a direct substitute based on complete parameter alignment across all electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The ADC0834CCN/NOPB is a direct functional equivalent suitable for replacement in applications currently using the obsolete ADC0834CCN. The substitute part maintains active product status with National Semiconductor, ensuring continued availability and supply chain reliability. Both components share identical electrical specifications, package geometry, and mounting characteristics, enabling direct board-level substitution without circuit redesign.

The ADC0834CCN/NOPB carries the same export classification (EAR99) and tariff code (8542.39.0001) as the original part, maintaining compliance consistency for regulated applications. Selection between these parts should be based on supply availability and procurement lead times, as electrical and mechanical compatibility is complete.

Frequently Asked Questions (FAQ)

Q: Can the ADC0834CCN/NOPB be used as a direct replacement for the ADC0834CCN?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including resolution, sampling rate, input channel configuration, supply voltages, temperature range, and 14-DIP package format. Direct substitution is supported without circuit modification.

Q: Why is the ADC0834CCN marked as obsolete?

A: The ADC0834CCN has reached end-of-life status with Texas Instruments. The ADC0834CCN/NOPB variant remains in active production, providing a viable path for continued component sourcing and design support.

Q: Are there any differences in the SPI interface implementation between these parts?

A: No. Both components implement identical SPI serial data interface protocols with the same timing and signal requirements. Existing firmware and hardware interfaces require no modification.

Q: What is the significance of the "/NOPB" suffix in the part number?

A: The "/NOPB" designation indicates lead-free (Pb-free) packaging and RoHS compliance status. This represents a manufacturing variant of the base ADC0834CCN design.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. The identical 14-DIP through-hole package with 0.300" (7.62mm) pitch allows direct socket compatibility. No PCB layout modifications are required.

Q: What supply voltage range must be maintained for proper operation?

A: Both analog and digital supply voltages must remain within the 4.5V to 6.3V range. Operation outside this specification may result in conversion errors or device damage.

Q: Are external reference components required for these ADCs?

A: Yes. Both the ADC0834CCN and ADC0834CCN/NOPB require an external voltage reference. The reference voltage must be applied to the dedicated reference input pin and should be stable and noise-filtered for accurate conversion results.