ADC0817CCN Equivalent & Substitute Parts

Part Overview

The ADC0817CCN is an 8-bit Analog to Digital Converter manufactured by Texas Instruments, designed for data acquisition applications requiring 16 single-ended inputs with a 1 SAR (Successive Approximation Register) architecture. This device operates at a 10 kHz sampling rate and features parallel data interface output, making it suitable for legacy industrial and embedded systems requiring moderate-speed analog conversion.

The ADC0817CCN is classified as obsolete. Finding equivalent or substitute parts is necessary to support system maintenance, design updates, or new production runs where original components are no longer readily available or where design improvements are desired.

Substiute Parts

ADC0817CCN

Texas InstrumentsIn Stock: 1431ADC0817CCN Datasheet

Current PartRFQ

ADS7961SDBT

Texas InstrumentsIn Stock: 845ADS7961SDBT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ADC0817CCN is determined by the following critical parameters:

• Resolution and Input Configuration: Both devices must provide 8-bit resolution with 16 single-ended inputs to maintain functional equivalence in data acquisition tasks.
• Architecture: SAR (Successive Approximation Register) architecture is required for compatible conversion methodology.
• Reference Type: External reference requirement must be maintained.
• Supply Voltage Compatibility: Substitute parts must operate within overlapping or compatible voltage ranges for both analog and digital supplies.
• Operating Temperature Range: The substitute must support the required temperature envelope for the application.

The ADS7961SDBT qualifies as a substitute based on matching resolution (8-bit), input count (16 single-ended), architecture (SAR), and reference type (external). However, significant differences exist in data interface, sampling rate, packaging, and compliance status, which must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The ADC0817CCN is obsolete, while the ADS7961SDBT is active and in production. Active status ensures ongoing availability and manufacturing support.

Compliance Status: The ADS7961SDBT is ROHS3 compliant, whereas the ADC0817CCN is RoHS non-compliant. For applications subject to RoHS regulations or environmental compliance requirements, the ADS7961SDBT is the appropriate choice.

Temperature Range: The ADS7961SDBT supports an extended operating temperature range (-40°C ~ 125°C) compared to the ADC0817CCN (-40°C ~ 85°C), providing greater thermal margin for demanding environments.

Supply Voltage: The ADS7961SDBT operates at lower supply voltages (1.7V ~ 5.25V digital, 2.7V ~ 5.25V analog) compared to the ADC0817CCN (4.5V ~ 6V), enabling integration into modern low-power system designs.

Frequently Asked Questions (FAQ)

Q: Can the ADS7961SDBT directly replace the ADC0817CCN in existing designs?

A: Direct pin-for-pin replacement is not possible due to different package types (40-DIP through-hole versus 38-TFSOP surface-mount) and different data interfaces (parallel versus SPI). PCB redesign and firmware modifications are required.

Q: What is the primary functional difference between these devices?

A: Both devices provide 8-bit resolution with 16 single-ended inputs and SAR architecture. The primary differences are data interface (parallel versus SPI), sampling rate (10 kHz versus 1 MHz), and packaging (through-hole versus surface-mount).

Q: Is the ADS7961SDBT suitable for applications requiring 10 kHz sampling?

A: Yes. The ADS7961SDBT's 1 MHz sampling rate exceeds the 10 kHz requirement of the ADC0817CCN, making it suitable for this application with significant performance headroom.

Q: What are the supply voltage compatibility considerations?

A: The ADS7961SDBT's analog supply range (2.7V ~ 5.25V) overlaps with the ADC0817CCN range (4.5V ~ 6V) between 4.5V and 5.25V. The ADS7961SDBT's digital supply range (1.7V ~ 5.25V) is broader and more flexible for modern logic level integration.

Q: Does the SPI interface of the ADS7961SDBT require different system integration compared to the parallel interface of the ADC0817CCN?

A: Yes. SPI is a serial interface requiring clock, chip select, and data lines, whereas parallel output requires multiple data lines. System firmware and PCB routing must be redesigned accordingly.

Q: Are there moisture sensitivity differences between these devices?

A: The ADC0817CCN has MSL 1 (unlimited), while the ADS7961SDBT has MSL 2 (1 year). The ADS7961SDBT requires controlled storage and handling conditions within one year of manufacture.