ADS7816PB Equivalent & Substitute Parts

Part Overview

The ADS7816PB is a 12-bit Analog to Digital Converter (ADC) 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 at a 200 kHz sampling rate. The device is packaged in an 8-pin DIP configuration for through-hole mounting.

The ADS7816PB is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

ADS7816PB

Texas InstrumentsIn Stock: 1435ADS7816PB Datasheet

Current PartRFQ

ADS7816U

Texas InstrumentsIn Stock: 1602ADS7816U Datasheet

MFR RecommendedRFQ

LTC1292DCN8#PBF

Analog Devices Inc.In Stock: 2280LTC1292DCN8#PBF Datasheet

MFR RecommendedRFQ

MCP3001-I/P

Microchip TechnologyIn Stock: 1367MCP3001-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADS7816PB is determined by the following critical parameters:

• Resolution (Number of Bits): 12-bit minimum
• Sampling Rate: 200 kHz minimum
• Number of Inputs: Single input (1 channel)
• Data Interface: SPI protocol
• Architecture: SAR-based conversion
• Reference Type: External reference capability
• Supply Voltage: 5V analog and digital supply compatibility
• Operating Temperature Range: -40°C to 85°C minimum
• Package Compatibility: 8-pin DIP or equivalent footprint

The substitute parts are grouped as follows:

Group 1 - Direct Equivalent (Same Package, Active Status)

• ADS7816U: Identical electrical specifications with active product status, packaged in 8-SOIC surface-mount configuration

Group 2 - Functional Equivalent (Different Architecture, Active Status)

• LTC1292DCN8#PBF: 12-bit resolution with dual-channel capability, lower sampling rate (60 kHz), packaged in 8-DIP through-hole
• MCP3001-I/P: 10-bit resolution (lower than 12-bit), 200 kHz sampling rate, packaged in 8-DIP through-hole

Parameter Comparison

Engineering Selection Recommendations

ADS7816U is the primary substitute for the ADS7816PB. Both devices share identical electrical specifications, including 12-bit resolution, 200 kHz sampling rate, differential input configuration, and SPI interface. The ADS7816U maintains active product status and full ROHS3 compliance. The primary design consideration is the package transition from 8-DIP through-hole to 8-SOIC surface-mount, which requires PCB layout modification.

LTC1292DCN8#PBF is a functional alternative for applications where dual-channel capability is beneficial. It maintains 12-bit resolution and 8-DIP through-hole packaging, eliminating PCB redesign requirements. However, the sampling rate is reduced to 60 kHz, and the operating temperature range is limited to 0°C to 70°C. This part is suitable only for applications where the lower sampling rate and narrower temperature range are acceptable.

MCP3001-I/P is a compatible alternative for applications where 10-bit resolution is sufficient. It maintains 200 kHz sampling rate, SPI interface, and 8-DIP through-hole packaging. The MCP3001-I/P offers wider supply voltage flexibility (2.7V to 5.5V) and unlimited MSL rating. This part is suitable for cost-optimized designs where the reduced resolution does not impact system performance.

All substitute parts maintain ROHS3 compliance and are currently in active production status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the ADS7816U directly replace the ADS7816PB without firmware changes?

A: The ADS7816U is electrically identical to the ADS7816PB. No firmware modifications are required. The primary change is the package format, which requires PCB layout modification from through-hole to surface-mount.

Q: What is the impact of using LTC1292DCN8#PBF in place of ADS7816PB?

A: The LTC1292DCN8#PBF provides 12-bit resolution and maintains the 8-DIP through-hole package, eliminating PCB redesign. However, the sampling rate is reduced from 200 kHz to 60 kHz, and the operating temperature range is narrowed from -40°C to 85°C to 0°C to 70°C. This substitution is valid only if the application can tolerate these limitations.

Q: Is the MCP3001-I/P suitable as a substitute for the ADS7816PB?

A: The MCP3001-I/P is compatible for applications where 10-bit resolution is acceptable. It maintains 200 kHz sampling rate, SPI interface, and 8-DIP through-hole packaging. The reduced resolution (10-bit versus 12-bit) results in lower measurement precision and must be evaluated against application requirements.

Q: What are the package compatibility considerations?

A: The ADS7816PB uses 8-DIP through-hole packaging. The ADS7816U uses 8-SOIC surface-mount packaging, requiring PCB layout changes. The LTC1292DCN8#PBF and MCP3001-I/P both use 8-DIP through-hole packaging, allowing direct socket replacement without PCB modification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The ADS7816U, LTC1292DCN8#PBF, and MCP3001-I/P are all ROHS3 compliant and suitable for applications requiring environmental compliance certification.

Q: What is the difference between differential and pseudo-differential input types?

A: The ADS7816PB and ADS7816U feature true differential inputs, allowing measurement of signals referenced to any common-mode voltage within the specified range. The MCP3001-I/P features pseudo-differential inputs, which provide single-ended measurement capability with limited common-mode range. This distinction affects signal conditioning requirements in the application circuit.

Q: Which substitute part offers the best long-term availability?

A: All three substitute parts maintain active product status. The ADS7816U, as a direct Texas Instruments equivalent, offers the highest assurance of long-term availability and supply continuity for existing ADS7816PB designs.