TLC0820ACFN Equivalent & Substitute Parts

Part Overview

The TLC0820ACFN is an 8-bit flash analog-to-digital converter manufactured by Texas Instruments, housed in a 20-PLCC package. This device features a single-ended input with a 392 kHz sampling rate and operates on 4.5V to 8V supply voltages for both analog and digital domains. The part is classified as Last Time Buy, indicating end-of-life status. Finding equivalent or substitute components is necessary due to product discontinuation and potential supply constraints.

Substiute Parts

TLC0820ACFN

Texas InstrumentsIn Stock: 3283TLC0820ACFN Datasheet

Current PartRFQ

ADS7882IPFBR

Texas InstrumentsIn Stock: 2748ADS7882IPFBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ADS7882IPFBR is identified as a manufacturer-recommended substitute for the TLC0820ACFN. Substitution logic is based on the following criteria:

Functional Compatibility Parameters:

• Single analog input channel
• Parallel data interface
• External reference capability
• Surface mount technology
• Texas Instruments manufacture

Architectural Differences: The ADS7882IPFBR employs a Successive Approximation Register (SAR) architecture with 12-bit resolution and 3 MHz sampling rate, compared to the TLC0820ACFN's 8-bit flash architecture at 392 kHz. These differences represent enhanced performance characteristics rather than functional incompatibility.

Package Consideration: The substitute uses a 48-TQFP package instead of the original 20-PLCC, requiring PCB layout modifications and different footprint design.

Supply Voltage Compatibility: The ADS7882IPFBR digital supply operates at 2.7V to 5.25V, while the TLC0820ACFN requires 4.5V to 8V. The analog supply for the substitute is fixed at 5V. System power architecture must accommodate these specifications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The TLC0820ACFN is designated Last Time Buy, confirming end-of-life status. The ADS7882IPFBR maintains Active product status, ensuring long-term availability and continued manufacturer support.

Compliance and Certifications: Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Both carry EAR99 ECCN classification.

Selection Criteria:

• Use ADS7882IPFBR when system design can accommodate 12-bit resolution and 3 MHz sampling rate
• Use ADS7882IPFBR when PCB layout can be redesigned for 48-TQFP package
• Use ADS7882IPFBR when power supply architecture supports 5V analog and 2.7V to 5.25V digital supplies
• Retain TLC0820ACFN only if existing inventory is available and design constraints prohibit package or performance changes

Frequently Asked Questions (FAQ)

Q: Can the ADS7882IPFBR directly replace the TLC0820ACFN without design changes?

A: No. The ADS7882IPFBR requires PCB layout redesign due to different package format (48-TQFP versus 20-PLCC), different pin assignments, and modified power supply requirements. Firmware or signal processing logic may require adjustment to accommodate 12-bit output versus 8-bit output.

Q: What are the key performance differences between these devices?

A: The ADS7882IPFBR provides higher resolution (12-bit versus 8-bit) and faster sampling (3 MHz versus 392 kHz). The TLC0820ACFN uses flash architecture for parallel conversion, while the ADS7882IPFBR uses SAR architecture. These differences may affect power consumption, conversion time, and signal processing requirements.

Q: Are the supply voltage ranges compatible?

A: Partial compatibility exists. Both devices accept 5V supplies. The TLC0820ACFN accepts 4.5V to 8V for both supplies, while the ADS7882IPFBR requires 5V fixed for analog supply and 2.7V to 5.25V for digital supply. Systems operating outside 5V nominal must be re-evaluated.

Q: What package considerations apply to substitution?

A: The TLC0820ACFN uses 20-PLCC (9x9) surface mount package. The ADS7882IPFBR uses 48-TQFP (7x7) surface mount package. PCB footprint, trace routing, and component placement must be redesigned. The increased pin count (48 versus 20) may require additional board layers or routing modifications.

Q: Does the input type difference affect compatibility?

A: The TLC0820ACFN accepts single-ended inputs. The ADS7882IPFBR accepts pseudo-differential inputs. Signal conditioning or input biasing may require modification to utilize the pseudo-differential capability or to operate in single-ended mode.

Q: What is the operating temperature range difference?

A: The TLC0820ACFN operates 0°C to 70°C. The ADS7882IPFBR operates -40°C to 85°C. The substitute provides extended low-temperature operation and higher maximum temperature rating, suitable for wider environmental applications.