ADS7822P Equivalent & Substitute Parts

Part Overview

The ADS7822P 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 dual supply voltage ranges (2.7V–3.6V and 5V). The device is packaged in an 8-PDIP through-hole configuration.

The ADS7822P is classified as obsolete. Identifying functionally equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

ADS7822P

Texas InstrumentsIn Stock: 4254ADS7822P Datasheet

Current PartRFQ

MCP3201-CI/P

Microchip TechnologyIn Stock: 6202MCP3201-CI/P Datasheet

MFR RecommendedRFQ

TLV2545ID

Texas InstrumentsIn Stock: 1297TLV2545ID Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ADS7822P are selected based on strict electrical and mechanical compatibility criteria. The following parameters must align for functional substitution:

• Resolution: 12 bits (mandatory)
• Number of Inputs: 1 channel (mandatory)
• Input Type: Pseudo-Differential (mandatory)
• Architecture: SAR (mandatory)
• Data Interface: SPI (mandatory)
• Reference Type: External (mandatory)
• Operating Temperature Range: −40°C to +85°C (mandatory)
• Supply Voltage Compatibility: Must support the required analog and digital supply ranges

Two substitute parts meet these criteria:

1. MCP3201-CI/P (Microchip Technology) – Electrically compatible with extended supply voltage range; different sampling rate (100 kSPS vs. 200 kSPS); same package type (8-PDIP); active product status; RoHS3 compliant.

2. TLV2545ID (Texas Instruments) – Electrically compatible with extended supply voltage range; matching sampling rate (200 kSPS); different package type (8-SOIC surface mount vs. 8-PDIP through hole); active product status; RoHS3 compliant.

Parameter Comparison

Engineering Selection Recommendations

MCP3201-CI/P is the preferred direct substitute for through-hole PCB designs. It maintains identical package geometry (8-PDIP) and mounting type, enabling socket-compatible replacement without PCB redesign. The device is active and RoHS3 compliant. The sampling rate is reduced to 100 kSPS; this difference is acceptable only if the application does not require the full 200 kSPS conversion rate of the original ADS7822P. Supply voltage range is extended to 2.7V–5.5V, providing greater design flexibility.

TLV2545ID is suitable for new surface-mount designs or applications where PCB redesign is feasible. It maintains the original 200 kSPS sampling rate and is manufactured by Texas Instruments, the original ADS7822P supplier. The device is active and RoHS3 compliant. The 8-SOIC package requires PCB layout modification and different soldering processes compared to through-hole mounting. Supply voltage range is extended to 2.7V–5.5V.

Both substitutes are active products with current manufacturing support and regulatory compliance certifications, addressing the obsolescence status of the ADS7822P.

Frequently Asked Questions (FAQ)

Q: Can MCP3201-CI/P be used as a direct replacement for ADS7822P in existing designs?

A: Yes, for through-hole PCB designs. The MCP3201-CI/P is pin-compatible and uses the same 8-PDIP package. However, the sampling rate is 100 kSPS instead of 200 kSPS. Verify that your application does not require the higher conversion speed before substitution.

Q: What is the key difference between MCP3201-CI/P and TLV2545ID?

A: The primary differences are package type and sampling rate. MCP3201-CI/P uses 8-PDIP through-hole packaging with 100 kSPS sampling. TLV2545ID uses 8-SOIC surface-mount packaging with 200 kSPS sampling (matching the original ADS7822P). Package selection depends on PCB design constraints and manufacturing capabilities.

Q: Are both substitutes compatible with the original supply voltage specifications?

A: Both substitutes support the required supply voltage ranges (2.7V–3.6V and 5V). Both offer extended ranges up to 5.5V, providing additional design margin. No supply voltage modifications are necessary.

Q: Do the substitute parts require firmware or software changes?

A: Both substitutes use SPI data interface with external reference configuration, matching the ADS7822P. Register maps and command protocols must be verified against individual datasheets to confirm software compatibility.

Q: Are both substitutes RoHS compliant?

A: Yes. Both MCP3201-CI/P and TLV2545ID are RoHS3 compliant. The original ADS7822P is RoHS non-compliant. Substitution addresses regulatory compliance requirements for new production.

Q: What is the moisture sensitivity level (MSL) for the substitute parts?

A: Both MCP3201-CI/P and TLV2545ID have MSL 1 (Unlimited), matching the original ADS7822P. No special moisture control measures are required during storage or handling.