ADC101S021CISD Equivalent & Substitute Parts

Part Overview

The ADC101S021CISD 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 communicates via SPI and DSP interfaces and is housed in a 6-WSON (2.2x2.5mm) package with exposed pad.

The ADC101S021CISD is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing production requirements, legacy system maintenance, and design continuity.

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 ADC101S021CISD is determined by strict equivalence across the following critical parameters:

Resolution: 10 bits
Sampling Rate: 200 kSPS
Number of Inputs: 1
Input Type: Single Ended
Data Interface: SPI, DSP
Architecture: SAR
Supply Voltage Range: 2.7V ~ 5.25V (both analog and digital)
Operating Temperature Range: -40°C ~ 85°C
Package: 6-WSON (2.2x2.5mm)
Mounting Type: Surface Mount

All identified substitute parts maintain identical electrical and mechanical specifications across these parameters. Differences exist only in product status, packaging format, and regulatory compliance certifications.

Parameter Comparison

Parameter	ADC101S021CISD	ADC101S021CISD/NOPB	ADC101S021CISDX/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
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The ADC101S021CISD is obsolete and no longer in active production. Both ADC101S021CISD/NOPB and ADC101S021CISDX/NOPB are active alternatives with identical electrical and mechanical specifications.

ADC101S021CISD/NOPB is the direct manufacturer equivalent, differentiated only by packaging format (Tape & Reel) and ROHS3 compliance certification. This part is suitable for applications requiring RoHS compliance and standard production packaging.

ADC101S021CISDX/NOPB is a parametric equivalent with identical functional specifications and ROHS3 compliance. This variant offers the highest available inventory (10,100 units) and is suitable for high-volume production requirements.

Both substitute parts are manufactured by Texas Instruments and maintain full electrical and thermal compatibility with the original ADC101S021CISD. Selection between the two substitutes should be based on packaging requirements and inventory availability for your production schedule.

Frequently Asked Questions (FAQ)

Q: Can ADC101S021CISD/NOPB and ADC101S021CISDX/NOPB be used interchangeably with ADC101S021CISD?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical resolution (10 bits), sampling rate (200 kSPS), supply voltage range (2.7V to 5.25V), operating temperature range (-40°C to 85°C), and package specifications (6-WSON 2.2x2.5mm). The differences are product status (active vs. obsolete), packaging format (Tape & Reel vs. bulk), and RoHS compliance certification.

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

A: Both parts are parametric equivalents with identical electrical specifications and ROHS3 compliance. The primary difference is inventory availability: ADC101S021CISDX/NOPB has significantly higher stock (10,100 units) compared to ADC101S021CISD/NOPB (1,455 units). Both are supplied in Tape & Reel packaging format.

Q: Why is the original ADC101S021CISD classified as obsolete?

A: The ADC101S021CISD has been discontinued by Texas Instruments. The active alternatives (ADC101S021CISD/NOPB and ADC101S021CISDX/NOPB) provide identical functionality with updated RoHS compliance and are recommended for new designs and production continuity.

Q: Are there any compatibility concerns when switching from ADC101S021CISD to the substitute parts?

A: No compatibility concerns exist. The substitute parts maintain identical pin configuration, package dimensions (6-WSON 2.2x2.5mm), electrical characteristics, and interface protocols (SPI, DSP). Direct board-level substitution is supported without design modifications.

Q: What packaging formats are available for the substitute parts?

A: Both ADC101S021CISD/NOPB and ADC101S021CISDX/NOPB are supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes. The original ADC101S021CISD was supplied in bulk packaging.

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