ADC0838CIWMX Equivalent & Substitute Parts

Part Overview

The ADC0838CIWMX is an 8-bit Analog to Digital Converter manufactured by Texas Instruments, designed for data acquisition applications requiring serial I/O interface. This component features a Successive Approximation Register (SAR) architecture with configurable input channels (4 or 8) and supports differential, pseudo-differential, and single-ended input types. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

ADC0838CIWMX

Texas InstrumentsIn Stock: 2423ADC0838CIWMX Datasheet

Current PartRFQ

ADC0838CIWMX/NOPB

National SemiconductorIn Stock: 2708ADC0838CIWMX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADC0838CIWMX is determined by strict alignment of the following electrical and mechanical parameters:

• Resolution: 8-bit conversion capability
• Channel Configuration: Support for 4 or 8 input channels
• Input Modes: Differential, pseudo-differential, and single-ended input support
• Serial Interface: SPI data interface compatibility
• Converter Architecture: SAR topology
• Reference Configuration: External reference requirement
• Supply Voltage Range: 4.5V to 6.3V for both analog and digital supplies
• Operating Temperature Range: -40°C to 85°C
• Package Format: 20-SOIC surface mount package with 0.295" (7.50mm) width
• Pin Compatibility: Identical pinout and signal assignments

Substitute parts must match all specified parameters without deviation to ensure direct functional replacement without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

The ADC0838CIWMX/NOPB serves as a direct functional equivalent to the ADC0838CIWMX. Both components share identical electrical specifications, pin configurations, and package formats. The primary distinction is product status: the original part is classified as obsolete, while the substitute maintains active production status through National Semiconductor.

For applications requiring continued component availability and supply chain reliability, the ADC0838CIWMX/NOPB is the appropriate selection. The active product status ensures ongoing manufacturing support and inventory accessibility. Both parts comply with identical compliance standards (ECCN: EAR99; HTSUS: 8542.39.0001), supporting equivalent regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can ADC0838CIWMX/NOPB replace ADC0838CIWMX in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The substitute features identical pin assignments, supply voltage requirements, input channel configurations, and package dimensions. No circuit modifications are required.

Q: What is the difference between these two part numbers?

A: The primary difference is manufacturer designation and product status. ADC0838CIWMX is manufactured by Texas Instruments and classified as obsolete. ADC0838CIWMX/NOPB is manufactured by National Semiconductor and maintains active production status. Electrical and functional specifications are identical.

Q: Are there packaging differences between these parts?

A: No. Both components use the 20-SOIC surface mount package with identical dimensions (0.295" width, 7.50mm). Pin spacing, lead configuration, and mounting requirements are identical.

Q: What supply voltage range do these converters support?

A: Both the analog and digital supply voltages operate within the range of 4.5V to 6.3V. This unified supply range simplifies power distribution design.

Q: How many input channels are available?

A: Both parts support configurable channel selection: 4 or 8 input channels. The multiplexer-ADC configuration allows flexible input routing based on application requirements.

Q: What input signal types are supported?

A: Both converters support three input modes: differential, pseudo-differential, and single-ended. This flexibility accommodates various sensor and signal conditioning configurations.

Q: Is the SPI interface identical between both parts?

A: Yes. Both components implement identical SPI serial interface protocols. Existing firmware and software drivers require no modification for the substitute part.