TLE2021AIDR Equivalent & Substitute Parts

Part Overview

The TLE2021AIDR is a general-purpose operational amplifier manufactured by Texas Instruments in the Excalibur™ series. This device is configured as a single-circuit amplifier in an 8-SOIC surface-mount package with a supply voltage range of 4V to 40V and operating temperature range of -40°C to 85°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance parameters and compatible packaging options are available from alternative manufacturers. Substitution becomes necessary for supply chain continuity, cost optimization, or when the primary part reaches end-of-life status.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	-
Number of Circuits	1	-
Slew Rate	0.65	V/µs
Gain Bandwidth Product	1.7	MHz
Current - Input Bias	25	nA
Voltage - Input Offset	80	µV
Current - Supply	240	µA
Current - Output / Channel	20	mA
Voltage - Supply Span (Min)	4	V
Voltage - Supply Span (Max)	40	V
Operating Temperature Range	-40 to 85	°C
Mounting Type	Surface Mount	-
Package / Case	8-SOIC (0.154", 3.90mm Width)	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the TLE2021AIDR are identified based on the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: General Purpose (single circuit)
Package compatibility: 8-SOIC surface-mount form factor
Supply voltage range: Minimum 4V, Maximum 40V
Operating temperature range: -40°C to 85°C
RoHS3 compliance and MSL Level 1 rating

Substitution Logic:

Substitute parts are grouped into two categories based on electrical performance characteristics:

Category 1 - Direct Performance Equivalents (AD817 Series): Parts with significantly higher slew rate (350V/µs vs. 0.65V/µs) and gain bandwidth product (50 MHz vs. 1.7 MHz). These devices provide superior performance in the same package form factor and are suitable for applications requiring faster signal processing. The AD817ARZ and AD817ARZ-REEL variants maintain the 8-SOIC package with identical mechanical dimensions.

Category 2 - Functional Alternatives (LT1008S8, LT1010 Series): Parts with different amplifier classifications (general-purpose or buffer) and varying electrical specifications. The LT1008S8#PBF operates as a general-purpose amplifier with lower slew rate (0.2V/µs) and reduced input bias current (100 pA). The LT1010 series comprises buffer amplifiers with higher output current capability (150 mA) and different package options (8-DFN, 8-DIP, TO-220-5).

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and active product status.

Parameter Comparison

Parameter	TLE2021AIDR	AD817ANZ	AD817ARZ	AD817ARZ-REEL	AD817ARZ-REEL7	LT1008S8#PBF
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1
Slew Rate (V/µs)	0.65	350	350	350	350	0.2
Gain Bandwidth Product (MHz)	1.7	50	50	50	50	-
Current - Input Bias (nA/µA/pA)	25 nA	3.3 µA	3.3 µA	3.3 µA	3.3 µA	100 pA
Voltage - Input Offset (µV)	80	500	500	500	500	30
Current - Supply (µA/mA)	240 µA	7 mA	7 mA	7 mA	7 mA	380 µA
Current - Output / Channel (mA)	20	50	50	50	50	-
Voltage - Supply Span (Min)	4 V	5 V	5 V	5 V	5 V	4 V
Voltage - Supply Span (Max)	40 V	36 V	36 V	36 V	36 V	36 V
Operating Temperature (°C)	-40 to 85	-40 to 85	-45 to 85	-40 to 85	-40 to 85	0 to 70
Mounting Type	Surface Mount	Through Hole	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC	8-DIP	8-SOIC	8-SOIC	8-SOIC	8-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Package and Mounting Compatibility (8-SOIC Surface Mount):

The AD817ARZ, AD817ARZ-REEL, and AD817ARZ-REEL7 variants provide direct mechanical and electrical substitution with identical 8-SOIC packaging. These parts maintain surface-mount compatibility and are suitable for PCB designs requiring no layout modifications. All three variants are ROHS3 compliant with MSL Level 1 rating and active product status. The primary difference between variants is packaging format: AD817ARZ is supplied in tube, while AD817ARZ-REEL and AD817ARZ-REEL7 are supplied in cut tape with Digi-Reel format. Selection between these variants depends on production volume and tape reel specifications.

For Through-Hole Applications:

The AD817ANZ provides equivalent electrical performance in an 8-DIP through-hole package. This variant is suitable for applications where surface-mount technology is not required or where through-hole assembly is preferred. ROHS3 compliance and MSL Level 1 rating are maintained.

For Low-Bias-Current Applications:

The LT1008S8#PBF offers significantly lower input bias current (100 pA vs. 25 nA) and lower input offset voltage (30 µV vs. 80 µV), making it suitable for precision measurement applications. However, this part operates with a reduced operating temperature range (0°C to 70°C) and lower slew rate (0.2V/µs). ROHS3 compliance and MSL Level 1 rating are maintained.

For High-Output-Current Applications:

The LT1010 series buffer amplifiers provide higher output current capability (150 mA vs. 20 mA) with multiple package options (8-DFN, 8-DIP, TO-220-5). These parts are classified as buffer amplifiers rather than general-purpose amplifiers and are suitable for applications requiring higher drive capability. All variants maintain ROHS3 compliance and MSL Level 1 rating with active product status.

Compliance and Regulatory Considerations:

All identified substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL Level 1 (unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage requirements. All parts are classified as active products with no end-of-life restrictions.

Frequently Asked Questions (FAQ)

Q1: Can the AD817ARZ directly replace the TLE2021AIDR in my circuit?

A: The AD817ARZ is mechanically compatible (8-SOIC package) and electrically suitable for general-purpose amplifier applications. However, the AD817ARZ has a higher slew rate (350V/µs vs. 0.65V/µs) and gain bandwidth product (50 MHz vs. 1.7 MHz). Verify that your circuit design does not depend on the lower bandwidth characteristics of the TLE2021AIDR. The minimum supply voltage for AD817ARZ is 5V compared to 4V for TLE2021AIDR.

Q2: What is the difference between AD817ARZ, AD817ARZ-REEL, and AD817ARZ-REEL7?

A: These three parts are electrically identical with the same 8-SOIC package. The differences are in packaging format and quantity per reel. AD817ARZ is supplied in tube packaging. AD817ARZ-REEL and AD817ARZ-REEL7 are supplied in cut tape with Digi-Reel format, with different reel specifications. Selection depends on production volume requirements and tape reel compatibility with your assembly equipment.

Q3: Why does the AD817ANZ have different packaging than the TLE2021AIDR?

A: The AD817ANZ is supplied in 8-DIP through-hole package while the TLE2021AIDR uses 8-SOIC surface-mount package. The AD817ANZ is suitable only for through-hole PCB designs and requires different board layout and assembly processes. For surface-mount applications, use AD817ARZ, AD817ARZ-REEL, or AD817ARZ-REEL7 instead.

Q4: Is the LT1008S8#PBF suitable for all applications using TLE2021AIDR?

A: The LT1008S8#PBF is suitable for precision applications requiring very low input bias current (100 pA) and low input offset voltage (30 µV). However, this part has a reduced operating temperature range (0°C to 70°C vs. -40°C to 85°C) and lower slew rate (0.2V/µs vs. 0.65V/µs). Use this part only when your application specifically requires these low-bias characteristics and operates within the specified temperature range.

Q5: When should I use LT1010 buffer amplifiers instead of general-purpose amplifiers?

A: The LT1010 series is classified as buffer amplifiers with higher output current capability (150 mA vs. 20 mA). Use these parts when your application requires driving higher loads or when buffer functionality is specifically needed. The LT1010 is not a direct replacement for general-purpose amplifier applications but serves specialized high-current output requirements.

Q6: Are all substitute parts ROHS3 compliant?

A: Yes, all identified substitute parts (AD817 series and LT1008S8#PBF) are ROHS3 compliant with MSL Level 1 (unlimited) moisture sensitivity rating. This ensures compatibility with standard manufacturing processes and storage requirements equivalent to the TLE2021AIDR.

Q7: What is the minimum supply voltage difference between TLE2021AIDR and AD817 variants?

A: The TLE2021AIDR operates with a minimum supply voltage of 4V, while AD817 variants require a minimum of 5V. Circuits designed for 4V operation cannot use AD817 substitutes without circuit modification. The LT1008S8#PBF maintains the 4V minimum supply voltage.

Q8: Can I use these substitute parts in high-temperature applications?

A: The TLE2021AIDR, AD817ARZ, AD817ARZ-REEL, and AD817ARZ-REEL7 all operate to 85°C maximum. The AD817ARZ extends to -45°C minimum. The LT1008S8#PBF is limited to 70°C maximum. For applications requiring operation above 85°C, none of these parts are suitable. The LT1010 series operates to 100°C maximum and may be considered for high-temperature buffer applications.

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