PCM1850APJT Equivalent & Substitute Parts

Part Overview

The PCM1850APJT is a 24-bit stereo audio ADC (Analog-to-Digital Converter) manufactured by Texas Instruments, designed for audio data acquisition applications requiring 96 kHz sampling rates. The device operates with dual voltage supply ranges (2.7V–3.6V and 4.5V–5.5V) and communicates via SPI interface in a 32-TQFP surface mount package.

The PCM1850APJT is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance of systems utilizing this component.

Substiute Parts

PCM1850APJT

Texas InstrumentsIn Stock: 1014PCM1850APJT Datasheet

Current PartRFQ

PCM1851APJT

Burr BrownIn Stock: 5776PCM1851APJT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCM1850APJT are identified based on the following critical parameters that determine functional and physical compatibility:

Core Electrical Parameters:

• Resolution: 24 bits
• Number of Channels: 2 (stereo configuration)
• Sampling Rate: 96 kHz
• Voltage Supply Ranges: 2.7V–3.6V and 4.5V–5.5V
• Operating Temperature Range: −40°C to +85°C

Physical & Interface Parameters:

• Package Type: 32-TQFP (7×7 mm)
• Mounting Type: Surface Mount
• Data Interface: SPI or equivalent serial communication protocols

Compliance & Status:

• RoHS Compliance: ROHS3 Compliant
• Product Status: Active (preferred for new designs and ongoing supply)

The PCM1851APJT qualifies as a manufacturer-recommended substitute because it maintains identical resolution, channel count, sampling rate, voltage supply specifications, operating temperature range, and physical package dimensions. While the PCM1851APJT implements I2C and Serial interfaces rather than SPI, it remains functionally equivalent for audio ADC applications requiring 24-bit, 96 kHz stereo conversion.

Parameter Comparison

Engineering Selection Recommendations

For Obsolete Part Replacement: The PCM1851APJT is the manufacturer-recommended substitute for the obsolete PCM1850APJT. Both devices share identical core audio ADC specifications: 24-bit resolution, 2-channel stereo configuration, 96 kHz sampling rate, and dual voltage supply compatibility (2.7V–3.6V and 4.5V–5.5V).

Product Status Consideration: The PCM1851APJT maintains active product status, ensuring ongoing availability and supply chain support. This status is critical for production continuity and long-term component sourcing.

Compliance & Certification: The PCM1850APJT is ROHS3 compliant with MSL 1 rating. The PCM1851APJT is suitable for applications requiring equivalent environmental and regulatory compliance standards.

Interface Protocol Difference: The primary technical distinction is the data interface: the PCM1850APJT uses SPI, while the PCM1851APJT implements I2C and Serial protocols. System designs must accommodate this interface change through firmware or hardware adaptation.

Frequently Asked Questions (FAQ)

Q: Can the PCM1851APJT directly replace the PCM1850APJT without design modifications?

A: The PCM1851APJT is electrically and mechanically compatible in terms of resolution, sampling rate, voltage supply, temperature range, and package type. However, the data interface differs: PCM1850APJT uses SPI while PCM1851APJT uses I2C and Serial. System designs must be adapted to accommodate this interface change.

Q: Are the voltage supply requirements identical between these parts?

A: Yes. Both the PCM1850APJT and PCM1851APJT operate with identical dual voltage supply ranges: 2.7V–3.6V and 4.5V–5.5V. Power supply circuits require no modification.

Q: What is the operating temperature range for both devices?

A: Both devices operate across the same temperature range: −40°C to +85°C. Thermal design considerations remain unchanged.

Q: Are both devices available in the same physical package?

A: Yes. Both the PCM1850APJT and PCM1851APJT are packaged in 32-TQFP (7×7 mm) surface mount configuration. PCB footprints are identical.

Q: Why is the PCM1850APJT classified as obsolete?

A: The PCM1850APJT has reached end-of-life status. The PCM1851APJT represents the active successor product, offering equivalent audio ADC performance with ongoing manufacturer support and supply availability.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by: 24-bit resolution, 2-channel stereo configuration, 96 kHz sampling rate, dual voltage supply ranges (2.7V–3.6V and 4.5V–5.5V), −40°C to +85°C operating temperature, and 32-TQFP surface mount package. Data interface protocol differences must be evaluated within the context of specific system requirements.