ADC101S021CISDX Equivalent & Substitute Parts

Part Overview

The ADC101S021CISDX is a 10-bit Analog to Digital Converter manufactured by Texas Instruments, designed for single-ended input applications with a 200 kSPS sampling rate. This component operates across a supply voltage range of 2.7V to 5.25V for both analog and digital domains, utilizing a Successive Approximation Register (SAR) architecture with integrated sample-and-hold functionality. The device is packaged in a 6-WSON (2.2x2.5mm) form factor with exposed pad for thermal management.

The ADC101S021CISDX is classified as obsolete, which necessitates identification of equivalent alternatives for new designs or production continuity. Active substitute parts maintain identical electrical and mechanical specifications while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Resolution	10 Bits
Sampling Rate	200 kSPS
Number of Inputs	1
Input Type	Single Ended
Data Interface	SPI, DSP
Architecture	SAR
Voltage - Supply, Analog	2.7V ~ 5.25V
Voltage - Supply, Digital	2.7V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Package / Case	6-WDFN Exposed Pad
Supplier Device Package	6-WSON (2.2x2.5)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the ADC101S021CISDX is determined by strict equivalence across the following critical parameters:

10-bit resolution
200 kSPS sampling rate
Single-ended input configuration
SPI and DSP data interface support
SAR architecture with integrated sample-and-hold
2.7V to 5.25V supply voltage range (analog and digital)
-40°C to 85°C operating temperature range
6-WSON (2.2x2.5mm) package with exposed pad

All identified substitutes maintain these specifications without deviation. Differences in product status, packaging format (bulk vs. tape & reel), and compliance certifications do not affect functional or electrical compatibility.

Parameter Comparison

Parameter	ADC101S021CISDX	ADC101S021CISDX/NOPB	ADC101S021CISD/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Resolution	10 Bits	10 Bits	10 Bits
Sampling Rate	200 kSPS	200 kSPS	200 kSPS
Number of Inputs	1	1	1
Input Type	Single Ended	Single Ended	Single Ended
Data Interface	SPI, DSP	SPI, DSP	SPI, DSP
Architecture	SAR	SAR	SAR
Voltage - Supply, Analog	2.7V ~ 5.25V	2.7V ~ 5.25V	2.7V ~ 5.25V
Voltage - Supply, Digital	2.7V ~ 5.25V	2.7V ~ 5.25V	2.7V ~ 5.25V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	6-WDFN Exposed Pad	6-WDFN Exposed Pad	6-WDFN Exposed Pad
Supplier Device Package	6-WSON (2.2x2.5)	6-WSON (2.2x2.5)	6-WSON (2.2x2.5)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

For applications currently using the obsolete ADC101S021CISDX, both ADC101S021CISDX/NOPB and ADC101S021CISD/NOPB are functionally equivalent substitutes. Selection between these alternatives should be based on the following factors:

ADC101S021CISDX/NOPB is the direct manufacturer equivalent with active product status and ROHS3 compliance. This part is available in tape & reel packaging format, suitable for automated assembly processes. Inventory availability is 10,100 units.

ADC101S021CISD/NOPB is a parametric equivalent with identical electrical specifications and active product status. This part also carries ROHS3 compliance and tape & reel packaging. Inventory availability is 1,455 units.

Both substitutes eliminate the compliance risk associated with the obsolete main part number while maintaining full electrical and mechanical compatibility. Selection may be driven by procurement lead times, inventory requirements, or existing supply chain relationships with Texas Instruments.

Frequently Asked Questions (FAQ)

Q: Can ADC101S021CISDX/NOPB be used as a direct replacement for ADC101S021CISDX?

A: Yes. Both parts are manufactured by Texas Instruments and share identical electrical specifications, including 10-bit resolution, 200 kSPS sampling rate, single-ended input configuration, and 6-WSON (2.2x2.5mm) package. The primary differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between ADC101S021CISDX/NOPB and ADC101S021CISD/NOPB?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The difference in part numbering reflects Texas Instruments' internal product designation. Both are active, ROHS3 compliant, and available in tape & reel packaging.

Q: Are there any package compatibility concerns when substituting these parts?

A: No. All three part numbers use the identical 6-WSON (2.2x2.5mm) package with exposed pad. PCB footprints, solder reflow profiles, and thermal management considerations remain unchanged.

Q: Does the tape & reel packaging format affect electrical performance?

A: No. Packaging format (bulk vs. tape & reel) is a logistics and assembly consideration only. Electrical specifications and performance characteristics are identical regardless of packaging format.

Q: Why is the main part number ADC101S021CISDX classified as obsolete?

A: Product obsolescence is determined by the manufacturer based on market demand, production economics, and product lifecycle management. Active substitutes with identical specifications are available to support design continuity.

Q: Are there any compliance differences that affect system-level certifications?

A: The substitute parts carry ROHS3 compliance, whereas the main part is RoHS non-compliant. Systems requiring RoHS compliance should use ADC101S021CISDX/NOPB or ADC101S021CISD/NOPB.

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