PCM1691DCARG4 Equivalent & Substitute Parts

Part Overview

The PCM1691DCARG4 is a 24-bit audio digital-to-analog converter (DAC) designed for high-resolution audio applications with support for sampling rates up to 192 kHz. It features 8 channels, DSP and I2S data interfaces, and operates across dual supply voltages (3V–3.6V and 5V). The device is packaged in a 48-pin PowerTFSOP surface-mount package.

The PCM1691DCARG4 is classified as obsolete. Locating equivalent or substitute components is necessary for new designs, production continuity, and long-term system support where this part number is no longer readily available through standard distribution channels.

Substiute Parts

PCM1691DCARG4

Texas InstrumentsIn Stock: 1090PCM1691DCARG4 Datasheet

Current PartRFQ

PCM1690DCAR

Texas InstrumentsIn Stock: 34093PCM1690DCAR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM1691DCARG4 is determined by strict equivalence across the following electrical and mechanical parameters:

• Channel Count: 8 channels (required match)
• Resolution: 24 bits (required match)
• Sampling Rate: 192 kHz (required match)
• Data Interface: DSP and I2S support (required match)
• Supply Voltage: 3V–3.6V and 5V dual supply (required match)
• Operating Temperature: −40°C to +85°C (required match)
• Package Type: 48-PowerTFSOP surface-mount (required match)
• Pin Compatibility: Identical pinout and electrical characteristics

The PCM1690DCAR meets all substitution criteria. It is manufactured by Texas Instruments and maintains identical electrical specifications, package configuration, and functional performance characteristics as the PCM1691DCARG4.

Parameter Comparison

Engineering Selection Recommendations

The PCM1690DCAR is the direct substitute for the PCM1691DCARG4. Both devices are manufactured by Texas Instruments and share identical electrical specifications, package configuration, and functional performance.

The PCM1690DCAR offers the additional advantage of active product status, ensuring ongoing availability through distribution channels and manufacturer support. The substitute part carries AEC-Q100 automotive qualification and Automotive grade designation, providing enhanced reliability documentation for applications requiring automotive-grade components.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and consumer applications. Moisture sensitivity level (MSL 3) and operating temperature range (−40°C to +85°C) are identical, ensuring equivalent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the PCM1690DCAR be used as a direct replacement for the PCM1691DCARG4?

A: Yes. The PCM1690DCAR is electrically and mechanically equivalent to the PCM1691DCARG4. All critical parameters—channel count, resolution, sampling rate, data interfaces, supply voltage, operating temperature, and package configuration—are identical. Pin-for-pin compatibility is maintained.

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

A: The PCM1691DCARG4 is classified as obsolete, while the PCM1690DCAR maintains active product status. The PCM1690DCAR also carries AEC-Q100 automotive qualification and Automotive grade designation. Functionally and electrically, the devices are equivalent.

Q: Are there any package or pinout differences?

A: No. Both devices use the 48-PowerTFSOP surface-mount package with identical dimensions (0.240", 6.10 mm width) and pinout configuration. PCB layout and assembly processes require no modification.

Q: Do supply voltage requirements differ?

A: No. Both the PCM1691DCARG4 and PCM1690DCAR operate with identical dual supply voltages: 3V–3.6V and 5V. Power supply design and decoupling requirements remain unchanged.

Q: Are there compliance or regulatory differences?

A: Both parts are ROHS3 compliant and REACH unaffected. The PCM1690DCAR includes AEC-Q100 automotive qualification, which may be beneficial for applications requiring automotive-grade component documentation but is not required for general industrial or consumer use.

Q: What is the moisture sensitivity level, and does it affect handling?

A: Both parts carry MSL 3 (168 hours) rating. This indicates standard moisture sensitivity requiring standard handling, storage, and reflow procedures. No additional precautions are necessary beyond industry-standard practices for surface-mount components.