ADS8515IDBR 16-Bit SAR ADC Equivalent & Substitute Parts

Part Overview

The ADS8515IDBR is a 16-bit successive approximation register (SAR) analog-to-digital converter manufactured by Texas Instruments, housed in a 28-SSOP surface mount package. This single-channel ADC operates at 250 kSPS with configurable internal and external reference options, supporting digital supply voltages from 1.65V to 5.25V. The device is Active product status and ROHS3 compliant, making it suitable for industrial and commercial data acquisition applications requiring high-resolution analog signal conversion.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative sourcing reduces lead times or cost, or when design flexibility permits operation within the specified parameter ranges of functionally compatible devices.

Substiute Parts

ADS8515IDBR

Texas InstrumentsIn Stock: 2132ADS8515IDBR Datasheet

Current PartRFQ

AD976AARSZ

Analog Devices Inc.In Stock: 2354AD976AARSZ Datasheet

MFR RecommendedRFQ

AD976ABRSZ

Analog Devices Inc.In Stock: 1365AD976ABRSZ Datasheet

MFR RecommendedRFQ

AD976BRSZ

Analog Devices Inc.In Stock: 1550AD976BRSZ Datasheet

MFR RecommendedRFQ

LTC1605CG#PBF

Analog Devices Inc.In Stock: 1133LTC1605CG#PBF Datasheet

MFR RecommendedRFQ

LTC1605IG#PBF

Analog Devices Inc.In Stock: 1827LTC1605IG#PBF Datasheet

MFR RecommendedRFQ

LTC1606ACG#PBF

Analog Devices Inc.In Stock: 898LTC1606ACG#PBF Datasheet

MFR RecommendedRFQ

LTC1606CG#PBF

Analog Devices Inc.In Stock: 1207LTC1606CG#PBF Datasheet

MFR RecommendedRFQ

LTC1606IG#PBF

Analog Devices Inc.In Stock: 2193LTC1606IG#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADS8515IDBR is determined by strict alignment with the following critical parameters:

• Resolution: 16 bits (mandatory match)
• Architecture: SAR (mandatory match)
• Package Type: 28-SSOP (mandatory match)
• Input Configuration: Single-ended, 1 input (mandatory match)
• Data Interface: Parallel (mandatory match)
• Reference Type: External and Internal support (mandatory match)
• Analog Supply: 5V (mandatory match)
• Operating Temperature: -40°C ~ 85°C (substitute must support this range or narrower)
• Sampling Rate: 250 kSPS or higher (substitute may operate at equal or lower rate within application tolerance)
• Digital Supply Voltage: Substitute must support 5V minimum; wider ranges are acceptable

Substitute parts are grouped by sampling rate capability and operating temperature range, as these parameters define performance boundaries within which the ADS8515IDBR operates.

Parameter Comparison

Engineering Selection Recommendations

Full-Range Temperature Substitutes (−40°C to 85°C)

Parts meeting the complete operating temperature range of the ADS8515IDBR are:

• AD976AARSZ (200 kSPS)
• AD976ABRSZ (200 kSPS)
• AD976BRSZ (100 kSPS)
• LTC1605IG#PBF (100 kSPS)
• LTC1606IG#PBF (250 kSPS)

All listed substitutes are ROHS3 compliant and REACH unaffected. LTC1606IG#PBF provides equivalent sampling rate (250 kSPS) with extended moisture sensitivity rating (MSL 1, Unlimited) and is recommended for applications requiring maximum environmental robustness.

Commercial Temperature Substitutes (0°C to 70°C)

For applications operating within commercial temperature ranges only:

• LTC1605CG#PBF (100 kSPS)
• LTC1606ACG#PBF (250 kSPS)
• LTC1606CG#PBF (250 kSPS)

These parts offer superior moisture sensitivity ratings (MSL 1) compared to the primary device.

Sampling Rate Considerations

The ADS8515IDBR operates at 250 kSPS. Substitutes operating at lower sampling rates (100 kSPS or 200 kSPS) are functionally compatible only when application requirements permit reduced conversion speed. LTC1606IG#PBF maintains equivalent sampling performance.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower sampling rate than the ADS8515IDBR?

A: Yes, if your application does not require 250 kSPS conversion speed. Parts such as AD976AARSZ (200 kSPS), AD976BRSZ (100 kSPS), and LTC1605IG#PBF (100 kSPS) are electrically compatible. Verify that your signal bandwidth and system timing requirements are satisfied at the lower sampling rate.

Q: What is the difference between the AD976 and LTC1606 series substitutes?

A: Both series are 16-bit SAR ADCs in 28-SSOP packages with identical resolution and architecture. The AD976 series (Analog Devices) operates at 100–200 kSPS with MSL 3 rating. The LTC1606 series offers 250 kSPS sampling with superior moisture sensitivity (MSL 1, Unlimited), making it more suitable for high-reliability applications.

Q: Does the ADS8515IDBR require a specific digital supply voltage?

A: The ADS8515IDBR accepts digital supply from 1.65V to 5.25V. All listed substitutes operate at fixed 5V digital supply. Ensure your power distribution supports 5V for substitute parts. The wider supply range of the primary part provides greater design flexibility in mixed-voltage systems.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the ADS8515IDBR.

Q: Which substitute offers the best long-term reliability for storage?

A: LTC1606IG#PBF features MSL 1 (Unlimited) moisture sensitivity rating, indicating no time-limited storage constraints. This contrasts with the ADS8515IDBR (MSL 2, 1 Year) and AD976 series (MSL 3, 168 Hours), making LTC1606IG#PBF optimal for extended shelf storage.

Q: Can I substitute parts with different operating temperature ranges?

A: Substitution is valid only when the substitute's operating temperature range encompasses or matches your application's thermal requirements. For full −40°C to 85°C operation, use AD976AARSZ, AD976ABRSZ, AD976BRSZ, LTC1605IG#PBF, or LTC1606IG#PBF. Commercial-range parts (0°C to 70°C) are not suitable for extended temperature applications.