ADS8515IBDBR Equivalent & Substitute Parts

Part Overview

The ADS8515IBDBR is a 16-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for single-ended input applications with a 250 kSPS sampling rate. This SAR (Successive Approximation Register) architecture device operates with external or internal reference voltage and is housed in a 28-SSOP surface mount package. The part is currently active in production and ROHS3 compliant. Equivalent and substitute parts are identified when design requirements allow for variations in sampling rate, supply voltage specifications, or operating temperature ranges while maintaining core functional compatibility.

Key Parameters

Parameter	Value
Resolution	16 Bit
Sampling Rate	250 kSPS
Number of Inputs	1
Input Type	Single Ended
Architecture	SAR
Data Interface	Parallel
Reference Type	External, Internal
Analog Supply Voltage	5V
Digital Supply Voltage	1.65V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Package	28-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ADS8515IBDBR is determined by the following core parameters: 16-bit resolution, single-ended input configuration, SAR architecture, parallel data interface, 28-SSOP package, and surface mount compatibility. Substitute parts must maintain these electrical and mechanical specifications.

Sampling rate variations are permitted within substitute relationships, as this parameter does not affect physical compatibility or core conversion functionality. Digital supply voltage tolerance differences are acceptable provided the part operates within the specified range. Operating temperature range narrowing is permissible for applications not requiring the full -40°C to 85°C specification.

The following substitute parts meet these criteria:

AD976AARSZ: 200 kSPS variant, maintains 5V analog supply and 28-SSOP package
AD976ABRSZ: 200 kSPS variant, maintains 5V analog supply and 28-SSOP package
AD976BRSZ: 100 kSPS variant, maintains 5V analog supply and 28-SSOP package
LTC1606ACG#PBF: 250 kSPS equivalent, maintains 5V analog supply and 28-SSOP package with narrower operating temperature range

Parameter Comparison

Parameter	ADS8515IBDBR	AD976AARSZ	AD976ABRSZ	AD976BRSZ	LTC1606ACG#PBF
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Resolution	16 Bit	16 Bit	16 Bit	16 Bit	16 Bit
Sampling Rate	250 kSPS	200 kSPS	200 kSPS	100 kSPS	250 kSPS
Number of Inputs	1	1	1	1	1
Input Type	Single Ended	Single Ended	Single Ended	Single Ended	Single Ended
Architecture	SAR	SAR	SAR	SAR	SAR
Data Interface	Parallel	Parallel	Parallel	Parallel	Parallel
Reference Type	External, Internal	External, Internal	External, Internal	External, Internal	External, Internal
Analog Supply Voltage	5V	5V	5V	5V	5V
Digital Supply Voltage	1.65V ~ 5.25V	5V	5V	5V	5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C
Package / Case	28-SSOP (0.209", 5.30mm Width)	28-SSOP (0.209", 5.30mm Width)	28-SSOP (0.209", 5.30mm Width)	28-SSOP (0.209", 5.30mm Width)	28-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	2 (1 Year)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the ADS8515IBDBR. Selection among substitutes depends on application-specific sampling rate requirements and operating temperature constraints.

For applications requiring the full -40°C to 85°C operating range, AD976AARSZ, AD976ABRSZ, or AD976BRSZ are suitable selections. These parts accept narrower digital supply voltage specifications (fixed 5V) compared to the ADS8515IBDBR's 1.65V to 5.25V range.

For applications operating within 0°C to 70°C temperature limits, LTC1606ACG#PBF provides equivalent 250 kSPS sampling performance with MSL rating of 1 (Unlimited), indicating superior moisture resistance characteristics.

Sampling rate selection should align with application bandwidth requirements: 250 kSPS for maximum conversion speed (ADS8515IBDBR or LTC1606ACG#PBF), 200 kSPS for moderate speed applications (AD976AARSZ or AD976ABRSZ), or 100 kSPS for lower bandwidth requirements (AD976BRSZ).

Frequently Asked Questions (FAQ)

Q: Can AD976AARSZ replace ADS8515IBDBR in all applications?

A: AD976AARSZ is mechanically and electrically compatible for applications not requiring the full -40°C to 85°C operating temperature range or the 1.65V to 5.25V digital supply voltage flexibility. The 200 kSPS sampling rate is lower than the ADS8515IBDBR's 250 kSPS specification.

Q: What is the primary difference between AD976AARSZ and AD976ABRSZ?

A: Both parts share identical electrical specifications including 200 kSPS sampling rate, 16-bit resolution, and 28-SSOP packaging. Differentiation is based on manufacturing lot and inventory availability.

Q: Is LTC1606ACG#PBF suitable for extended temperature applications?

A: No. LTC1606ACG#PBF operates within 0°C to 70°C, which is narrower than the ADS8515IBDBR's -40°C to 85°C range. This part is suitable only for applications within the specified temperature limits.

Q: Do all substitute parts use the same 28-SSOP package?

A: Yes. All listed substitutes use the 28-SSOP (0.209", 5.30mm Width) surface mount package, ensuring mechanical compatibility with existing PCB layouts designed for the ADS8515IBDBR.

Q: What does MSL rating indicate for component selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions before soldering. ADS8515IBDBR has MSL 2 (1 Year), AD976 variants have MSL 3 (168 Hours), and LTC1606ACG#PBF has MSL 1 (Unlimited). Lower MSL ratings require shorter storage and handling times before assembly.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory compliance to the ADS8515IBDBR.

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