PCM1750UG4 Equivalent & Substitute Parts

Part Overview

The PCM1750UG4 is an 18-bit audio ADC manufactured by Texas Instruments, designed for dual-channel serial data acquisition applications. This component operates with dual analog and digital supply voltages (±) and is housed in a 28-SOIC surface mount package. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

PCM1750UG4

Texas InstrumentsIn Stock: 1204PCM1750UG4 Datasheet

Current PartRFQ

ADS8381IBPFBT

Texas InstrumentsIn Stock: 1169ADS8381IBPFBT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM1750UG4 is determined by the following critical parameters:

• Resolution: 18-bit conversion capability
• Voltage Supply Compatibility: Operating range 4.75V ~ 5.25V for digital supply
• Operating Temperature Range: -40°C ~ 85°C
• Compliance Standards: ROHS3 compliance and REACH unaffected status
• Regulatory Classification: EAR99 export control and HTSUS 8542.39.0001 tariff code

The ADS8381IBPFBT qualifies as a substitute based on matching 18-bit resolution, overlapping voltage supply specifications, identical operating temperature range, and equivalent compliance certifications. Both components maintain ROHS3 compliance and EAR99 classification, ensuring regulatory continuity.

Parameter Comparison

Engineering Selection Recommendations

The ADS8381IBPFBT is an active product alternative to the obsolete PCM1750UG4, maintaining equivalent 18-bit resolution and operating temperature specifications. Both components satisfy ROHS3 compliance requirements and carry identical export classification (EAR99) and tariff coding (HTSUS 8542.39.0001).

Design integration requires consideration of architectural differences: the PCM1750UG4 provides dual-channel serial output, while the ADS8381IBPFBT offers single-channel parallel output with expanded digital supply voltage range (2.7V ~ 5.25V versus 4.75V ~ 5.25V). Package footprint differs significantly (28-SOIC versus 48-TQFP), necessitating PCB layout modifications. The ADS8381IBPFBT's active product status ensures ongoing manufacturer support and component availability.

Frequently Asked Questions (FAQ)

Q: Can the ADS8381IBPFBT directly replace the PCM1750UG4 without circuit modifications?

A: Direct pin-for-pin replacement is not possible. The ADS8381IBPFBT uses a 48-TQFP package compared to the 28-SOIC package of the PCM1750UG4, and implements parallel data output instead of serial. Circuit redesign is required for integration.

Q: What are the key differences in data interface architecture?

A: The PCM1750UG4 outputs data serially, reducing pin count and simplifying board routing. The ADS8381IBPFBT uses parallel output, requiring additional signal lines but potentially enabling faster data transfer rates.

Q: Are both components suitable for the same supply voltage range?

A: The ADS8381IBPFBT supports a broader digital supply range (2.7V ~ 5.25V) compared to the PCM1750UG4 (4.75V ~ 5.25V). Systems operating at the lower end of the PCM1750UG4 range remain compatible with the substitute.

Q: Does the single-channel limitation of the ADS8381IBPFBT affect substitution viability?

A: The PCM1750UG4 provides two channels while the ADS8381IBPFBT provides one. Multi-channel applications require either multiple ADS8381IBPFBT devices or alternative solutions with equivalent channel counts.

Q: Are compliance certifications maintained with this substitution?

A: Both components maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification, ensuring regulatory continuity in applications requiring these certifications.