ADS7822PB Equivalent & Substitute Parts

Part Overview

The ADS7822PB is a 12-bit Analog to Digital Converter manufactured by Texas Instruments, designed for single-channel data acquisition applications. It features a Successive Approximation Register (SAR) architecture with external reference capability and operates across supply voltages of 2.7V to 3.6V or 5V. The device is packaged in an 8-pin DIP configuration for through-hole mounting.

The ADS7822PB is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this data acquisition component.

Substiute Parts

ADS7822PB

Texas InstrumentsIn Stock: 2452ADS7822PB Datasheet

Current PartRFQ

MCP3201-BI/P

Microchip TechnologyIn Stock: 2703MCP3201-BI/P Datasheet

MFR RecommendedRFQ

TLV2545ID

Texas InstrumentsIn Stock: 1297TLV2545ID Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ADS7822PB is determined by strict alignment of the following critical parameters:

• 12-bit resolution
• Single analog input channel
• Pseudo-differential input configuration
• SPI serial data interface
• SAR architecture with external reference
• Operating temperature range of -40°C to 85°C
• Through-hole or surface-mount packaging options

Two substitute parts meet these core functional requirements:

MCP3201-BI/P (Microchip Technology): Maintains identical resolution, input configuration, data interface, and architecture. Operates across an expanded supply voltage range (2.7V ~ 5.5V). Packaged in 8-DIP through-hole format, matching the original mounting type. Sampling rate is 100k samples per second, which is lower than the original part.

TLV2545ID (Texas Instruments): Maintains identical resolution, input configuration, data interface, and architecture. Operates across an expanded supply voltage range (2.7V ~ 5.5V). Sampling rate matches the original at 200k samples per second. Packaged in 8-SOIC surface-mount format, requiring PCB layout modification compared to the original through-hole design.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Designs:

The MCP3201-BI/P is the direct mechanical replacement for the ADS7822PB, maintaining the 8-DIP through-hole package format. This substitute is active and ROHS3 compliant. The primary trade-off is a reduced sampling rate of 100k samples per second compared to the original 200k samples per second. Selection of this part is appropriate when sampling rate reduction is acceptable for the application and through-hole mounting must be preserved.

For Surface-Mount PCB Designs or New Designs:

The TLV2545ID maintains the original sampling rate of 200k samples per second and is manufactured by Texas Instruments, the original supplier. This part is active and ROHS3 compliant. The package format is 8-SOIC surface-mount, requiring PCB redesign if the original through-hole footprint is in use. This substitute is appropriate for new designs or PCB revisions that can accommodate surface-mount technology.

Both substitute parts operate across an expanded supply voltage range (2.7V ~ 5.5V) compared to the original part, providing improved flexibility in power supply design.

Frequently Asked Questions (FAQ)

Q: Can the MCP3201-BI/P be used as a direct replacement for the ADS7822PB without PCB modification?

A: Yes, the MCP3201-BI/P shares the identical 8-DIP through-hole package footprint and pin configuration. No PCB layout changes are required. However, the reduced sampling rate of 100k samples per second must be verified as acceptable for the application.

Q: What is the primary difference between the MCP3201-BI/P and TLV2545ID substitutes?

A: The MCP3201-BI/P maintains through-hole packaging (8-DIP) but operates at 100k samples per second. The TLV2545ID maintains the original 200k samples per second sampling rate but uses surface-mount packaging (8-SOIC), requiring PCB redesign.

Q: Are both substitute parts RoHS compliant?

A: Yes, both the MCP3201-BI/P and TLV2545ID are ROHS3 compliant. The original ADS7822PB is RoHS non-compliant.

Q: Do the substitute parts support the same supply voltage range as the ADS7822PB?

A: Both substitutes support an expanded range of 2.7V ~ 5.5V, which encompasses the original part's 2.7V ~ 3.6V and 5V specifications. This provides additional design flexibility.

Q: Can the TLV2545ID be used in a through-hole design?

A: No, the TLV2545ID is packaged in 8-SOIC surface-mount format. Through-hole mounting requires the MCP3201-BI/P or equivalent DIP-packaged alternative.

Q: Are the SPI interface protocols identical across all three parts?

A: All three parts use SPI serial data interface with external reference configuration. Refer to individual datasheets for specific timing and protocol details to ensure software compatibility.