ADC10064CIWM Equivalent & Substitute Parts

Part Overview

The ADC10064CIWM is a 10-bit flash analog-to-digital converter manufactured by Texas Instruments, designed for data acquisition applications requiring 4 single-ended inputs with parallel output interface. This device operates at a sampling rate of 800 kSPS and is housed in a 28-SOIC package. The product is currently obsolete, making equivalent substitute parts necessary for new designs and ongoing system support.

Key Parameters

Parameter	ADC10064CIWM
Manufacturer	Texas Instruments
Number of Bits	10
Sampling Rate (Per Second)	800 kSPS
Number of Inputs	4
Input Type	Single Ended
Data Interface	Parallel
Architecture	Flash
Voltage - Supply, Analog	5V
Voltage - Supply, Digital	5V
Operating Temperature	-40°C ~ 85°C
Package / Case	28-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete

Substitute Part Grouping Explanation

The ADC104S101CIMM/NOPB from National Semiconductor qualifies as a functional substitute based on the following core parameters:

Matching Criteria:

Resolution: 10-bit (identical)
Number of Inputs: 4 single-ended channels (identical)
Operating Temperature Range: -40°C ~ 85°C (identical)
Supply Voltage Compatibility: 5V operation supported within 2.7V ~ 5.25V range
Number of A/D Converters: 1 (identical)
Multiplexer Configuration: MUX-S/H-ADC with 1:1 S/H:ADC ratio (identical)

Key Differences:

Architecture: SAR (Successive Approximation Register) vs. Flash
Sampling Rate: 1 MSPS vs. 800 kSPS (higher performance)
Data Interface: SPI/DSP vs. Parallel (requires interface redesign)
Package: 10-VSSOP vs. 28-SOIC (smaller footprint, different pinout)
Reference Type: Supply vs. External (different biasing requirements)
Product Status: Active (ongoing availability and support)

Parameter Comparison

Parameter	ADC10064CIWM	ADC104S101CIMM/NOPB	Compatibility
Number of Bits	10	10	Match
Sampling Rate (Per Second)	800 kSPS	1 MSPS	Substitute exceeds requirement
Number of Inputs	4	4	Match
Input Type	Single Ended	Single Ended	Match
Configuration	MUX-S/H-ADC	MUX-S/H-ADC	Match
Ratio - S/H:ADC	1:1	1:1	Match
Number of A/D Converters	1	1	Match
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Match
Voltage - Supply, Analog	5V	2.7V ~ 5.25V	5V within range
Voltage - Supply, Digital	5V	2.7V ~ 5.25V	5V within range
Data Interface	Parallel	SPI, DSP	Different - requires interface redesign
Architecture	Flash	SAR	Different - different conversion method
Reference Type	External	Supply	Different - different biasing
Package / Case	28-SOIC	10-VSSOP	Different - PCB layout redesign required
Product Status	Obsolete	Active	Substitute is actively supported

Engineering Selection Recommendations

The ADC104S101CIMM/NOPB is an active product with full manufacturer support and compliance certifications (ECCN: EAR99, HTSUS: 8542.39.0001), making it suitable for new designs and long-term system support. The substitute maintains critical functional parameters including 10-bit resolution, 4-channel single-ended input configuration, and identical operating temperature range.

Design integration requires accommodation of three primary differences: (1) serial SPI/DSP interface instead of parallel output, necessitating microcontroller or FPGA interface logic redesign; (2) smaller 10-VSSOP package requiring PCB layout modification; (3) internal supply-referenced voltage instead of external reference, affecting analog signal conditioning circuit design.

The substitute's higher sampling rate (1 MSPS vs. 800 kSPS) and wider supply voltage range (2.7V ~ 5.25V) provide additional design flexibility and performance margin for applications operating within the original 5V specification.

Frequently Asked Questions (FAQ)

Q: Can the ADC104S101CIMM/NOPB directly replace the ADC10064CIWM without circuit modifications?

A: No. While both devices share 10-bit resolution and 4-channel single-ended input architecture, the ADC104S101CIMM/NOPB requires circuit redesign in three areas: (1) parallel-to-SPI/DSP interface conversion, (2) PCB layout changes due to different package (10-VSSOP vs. 28-SOIC), and (3) analog reference circuit modification (supply-referenced vs. external reference).

Q: What is the primary functional difference between flash and SAR architectures in these devices?

A: Flash architecture (ADC10064CIWM) performs simultaneous comparison of the input signal against all 1024 reference levels, achieving 800 kSPS conversion speed. SAR architecture (ADC104S101CIMM/NOPB) uses sequential binary search, achieving 1 MSPS. Both architectures deliver 10-bit resolution with identical operating temperature range.

Q: Are the supply voltage requirements compatible?

A: Yes. The ADC10064CIWM requires fixed 5V supply. The ADC104S101CIMM/NOPB operates across 2.7V ~ 5.25V range, making 5V operation fully compatible. The substitute provides wider voltage tolerance for system flexibility.

Q: What package considerations apply to substitution?

A: The ADC10064CIWM uses 28-SOIC (0.295", 7.50mm width) while the ADC104S101CIMM/NOPB uses 10-VSSOP (0.118", 3.00mm width). The substitute's smaller package reduces PCB footprint but requires complete layout redesign and different soldering parameters.

Q: Is the ADC104S101CIMM/NOPB suitable for applications requiring the original 800 kSPS sampling rate?

A: Yes. The substitute's 1 MSPS sampling rate exceeds the original 800 kSPS requirement, providing performance margin. Applications designed for 800 kSPS operation will function within the substitute's specifications.

Q: What compliance certifications apply to the substitute part?

A: The ADC104S101CIMM/NOPB carries ECCN: EAR99 and HTSUS: 8542.39.0001 classifications, matching the original part's export and tariff compliance status.

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