ADS7817U/2K5 Equivalent & Substitute Parts

Part Overview

The ADS7817U/2K5 is a 12-bit Analog to Digital Converter (ADC) with SAR architecture, single differential input, and SPI data interface. Manufactured by Texas Instruments, this component operates at 200 kSPS sampling rate with 5V analog and digital supply voltages. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Resolution	12 Bits
Sampling Rate	200 kSPS
Number of Inputs	1
Input Type	Differential
Data Interface	SPI
Architecture	SAR
Reference Type	External
Voltage - Supply, Analog	5V
Voltage - Supply, Digital	5V
Operating Temperature	-40°C to 85°C
Package	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the ADS7817U/2K5 are qualified based on strict electrical and mechanical parameter matching:

Critical Parameters for Substitution:

Resolution: 12 bits
Sampling Rate: 200 kSPS
Input Configuration: 1 differential input
Data Interface: SPI
Architecture: SAR with external reference
Supply Voltages: 5V analog and digital
Operating Temperature Range: -40°C to 85°C
Package: 8-SOIC form factor
Mounting: Surface mount

All substitute parts listed maintain identical electrical specifications and mechanical compatibility. Substitution categories are determined by product status and compliance certifications rather than functional differences.

Parameter Comparison

Part Number	Manufacturer	Product Status	Resolution	Sampling Rate	Inputs	Input Type	Data Interface	Supply (A/D)	Temp Range	Package	RoHS Status	MSL
ADS7817U/2K5	Texas Instruments	Obsolete	12-bit	200 kSPS	1	Differential	SPI	5V/5V	-40 to 85°C	8-SOIC	Non-compliant	2 (1 Year)
ADS7817UC/2K5	Texas Instruments	Active	12-bit	200 kSPS	1	Differential	SPI	5V/5V	-40 to 85°C	8-SOIC	ROHS3 Compliant	2 (1 Year)
ADS7816U/2K5	Texas Instruments	Active	12-bit	200 kSPS	1	Differential	SPI	5V/5V	-40 to 85°C	8-SOIC	ROHS3 Compliant	2 (1 Year)
ADS7816UB/2K5	Texas Instruments	Active	12-bit	200 kSPS	1	Differential	SPI	5V/5V	-40 to 85°C	8-SOIC	ROHS3 Compliant	2 (1 Year)
ADS7816UC/2K5	Texas Instruments	Active	12-bit	200 kSPS	1	Differential	SPI	5V/5V	-40 to 85°C	8-SOIC	ROHS3 Compliant	2 (1 Year)
ISL267817IBZ-T	Renesas Electronics Corporation	Active	12-bit	200 kSPS	1	Differential	SPI	5V/5V	-40 to 85°C	8-SOIC	ROHS3 Compliant	1 (Unlimited)
ISL267817IBZ-T7A	Renesas Electronics Corporation	Obsolete	12-bit	200 kSPS	1	Differential	SPI	5V/5V	-40 to 85°C	8-SOIC	ROHS3 Compliant	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation - MFR Recommended Substitute: ADS7817UC/2K5 is the manufacturer-recommended direct replacement. This Texas Instruments part maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. Packaging is Tape & Reel (TR).

Secondary Recommendations - Parametric Equivalents (Active Status):

ADS7816U/2K5, ADS7816UB/2K5, and ADS7816UC/2K5 are parametrically equivalent Texas Instruments alternatives with active product status and ROHS3 compliance. These parts differ only in internal design variants (U, UB, UC suffixes) while maintaining identical functional and electrical characteristics.
ISL267817IBZ-T is a Renesas Electronics parametric equivalent with active status, ROHS3 compliance, and superior moisture sensitivity level (MSL 1 vs. MSL 2), providing extended shelf life without moisture baking requirements.

Alternative for Obsolete Status: ISL267817IBZ-T7A is a Renesas equivalent currently in obsolete status. While functionally equivalent, this part should be considered only when active alternatives are unavailable, as its obsolete classification may limit future availability.

Frequently Asked Questions (FAQ)

Q: Can ADS7817UC/2K5 be used as a direct replacement for ADS7817U/2K5? A: Yes. ADS7817UC/2K5 is the manufacturer-recommended substitute with identical electrical specifications, pin configuration, and 8-SOIC package. The primary difference is active product status and ROHS3 compliance versus the obsolete, non-compliant original part.

Q: What is the difference between ADS7817UC/2K5 and ADS7816U/2K5? A: Both parts are parametrically equivalent with identical 12-bit resolution, 200 kSPS sampling rate, differential input, SPI interface, and 8-SOIC packaging. The difference lies in internal design variants (ADS7817 vs. ADS7816 base product numbers). Both are active and ROHS3 compliant.

Q: Why is ISL267817IBZ-T preferred over other alternatives? A: ISL267817IBZ-T offers the same electrical and mechanical specifications as other substitutes but features MSL 1 (Unlimited) moisture sensitivity versus MSL 2 (1 Year) for Texas Instruments parts. This eliminates moisture baking requirements and extends shelf life indefinitely.

Q: Are there packaging differences between substitute parts? A: All substitute parts use the same 8-SOIC (0.154", 3.90mm Width) surface mount package. Packaging format differences (Tape & Reel vs. Cut Tape) do not affect electrical compatibility or board-level integration.

Q: Can I use ISL267817IBZ-T7A if other substitutes are unavailable? A: ISL267817IBZ-T7A is functionally equivalent but classified as obsolete. It should be used only when active alternatives (ADS7817UC/2K5 or ISL267817IBZ-T) are unavailable, as obsolete status may limit future procurement options.

Q: What compliance certifications apply to these substitutes? A: All active substitute parts (ADS7817UC/2K5, ADS7816U/2K5, ADS7816UB/2K5, ADS7816UC/2K5, and ISL267817IBZ-T) are ROHS3 compliant and REACH unaffected. The original ADS7817U/2K5 is RoHS non-compliant and should be replaced for new designs requiring regulatory compliance.

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