TLC3541IDRG4 Equivalent & Substitute Parts

Part Overview

The TLC3541IDRG4 is a 14-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, configured as a single-input SAR (Successive Approximation Register) architecture device in an 8-SOIC surface mount package. This component is designed for data acquisition applications requiring moderate sampling rates and external voltage reference configuration.

The TLC3541IDRG4 has been discontinued at DiGi Electronics. Equivalent substitute parts from Analog Devices Inc. maintain identical electrical and mechanical specifications, enabling direct replacement in existing designs without circuit modification.

Key Parameters

Parameter	Value
Resolution	14 Bits
Sampling Rate	200 kSPS
Number of Inputs	1
Input Type	Single Ended
Data Interface	SPI
Architecture	SAR
Reference Type	External
Analog Supply Voltage	5V
Digital Supply Voltage	5V
Operating Temperature Range	-40°C to 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TLC3541IDRG4 is determined by strict equivalence across the following critical parameters:

Resolution & Sampling Rate: All substitute parts maintain 14-bit resolution at 200 kSPS
Input Configuration: Single-ended input with 1 ADC channel
Interface Protocol: SPI data interface for digital communication
Converter Architecture: SAR topology with external reference configuration
Supply Voltages: 5V analog and digital supplies
Temperature Range: -40°C to 85°C operating specification
Package & Pinout: 8-SOIC surface mount package with identical mechanical dimensions
Compliance: ROHS3 compliance and MSL Level 1 rating maintained across all substitutes

The Analog Devices AD7894 series (base product number) provides parametric equivalents with identical functional specifications. Packaging variants (Cut Tape & Digi-Reel vs. Tape & Reel) do not affect electrical performance and are selected based on procurement and assembly requirements.

Parameter Comparison

Parameter	TLC3541IDRG4	AD7894ARZ-10REEL7	AD7894ARZ-2REEL	AD7894ARZ-3REEL7	AD7894BRZ-10REEL7
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Resolution (Bits)	14	14	14	14	14
Sampling Rate (kSPS)	200	200	200	200	200
Number of Inputs	1	1	1	1	1
Input Type	Single Ended	Single Ended	Single Ended	Single Ended	Single Ended
Data Interface	SPI	SPI	SPI	SPI	SPI
Architecture	SAR	SAR	SAR	SAR	SAR
Reference Type	External	External	External	External	External
Analog Supply (V)	5	5	5	5	5
Digital Supply (V)	5	5	5	5	5
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Package Type	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued	Active	Active	Active	Active

Engineering Selection Recommendations

All four Analog Devices substitute parts (AD7894ARZ-10REEL7, AD7894ARZ-2REEL, AD7894ARZ-3REEL7, AD7894BRZ-10REEL7) are direct parametric equivalents to the discontinued TLC3541IDRG4. Selection among these substitutes is based on procurement requirements and packaging format:

AD7894ARZ-10REEL7 and AD7894ARZ-3REEL7 are supplied in Cut Tape & Digi-Reel format, suitable for automated pick-and-place assembly with standard tape-and-reel handling equipment.

AD7894ARZ-2REEL and AD7894BRZ-10REEL7 are supplied in Tape & Reel format, appropriate for high-volume production runs and standard reel-based component feeders.

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard PCB assembly processes and long-term storage without moisture sensitivity concerns. Active product status across all Analog Devices alternatives ensures continued availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can AD7894 series parts directly replace the TLC3541IDRG4 without circuit modification?

A: Yes. All AD7894 variants listed maintain identical electrical specifications (14-bit resolution, 200 kSPS sampling rate, 5V supply, SPI interface, external reference configuration) and mechanical compatibility (8-SOIC package). No circuit redesign is required.

Q: What is the difference between the packaging variants (Cut Tape & Digi-Reel vs. Tape & Reel)?

A: Packaging format affects component delivery and assembly handling only. Cut Tape & Digi-Reel format provides flexibility for lower-volume or mixed-component assembly. Tape & Reel format optimizes high-volume production with standard reel feeders. Electrical performance is identical.

Q: Are all substitute parts currently available?

A: All four AD7894 variants maintain active product status with Analog Devices. Current inventory levels range from 937 to 3785 pieces across the substitute options.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. All AD7894 substitutes are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating identical to the original TLC3541IDRG4.

Q: Which substitute part should be selected for new designs?

A: Any of the four AD7894 variants are suitable for new designs. Selection depends on procurement volume and assembly process requirements. For standard surface mount assembly, AD7894ARZ-10REEL7 or AD7894ARZ-3REEL7 are recommended due to Cut Tape & Digi-Reel availability.

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