TLE2021IDR Equivalent & Substitute Parts

Part Overview

The TLE2021IDR 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 4 V to 40 V and operating temperature range of -40°C to 85°C. The TLE2021IDR is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the TLE2021IDR becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design modifications necessitate different electrical characteristics within compatible parameter ranges.

Key Parameters

Parameter	TLE2021IDR	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Slew Rate	0.65	V/µs
Gain Bandwidth Product	2	MHz
Current - Input Bias	25	nA
Voltage - Input Offset	120	µV
Current - Supply	240	µA
Current - Output / Channel	20	mA
Voltage - Supply Span (Min)	4	V
Voltage - Supply Span (Max)	40	V
Operating Temperature	-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

Substitution of the TLE2021IDR is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 1
Voltage Supply Range: Minimum 4 V, Maximum 40 V (substitute must operate within or exceed this range)
Operating Temperature Range: -40°C to 85°C (substitute must cover this range)
Package compatibility: 8-SOIC surface-mount format for direct pin-compatible replacement

Secondary Considerations:

Slew Rate: 0.65 V/µs (baseline performance metric)
Gain Bandwidth Product: 2 MHz (baseline performance metric)
Current - Input Bias: 25 nA (baseline performance metric)
Voltage - Input Offset: 120 µV (baseline performance metric)
Current - Supply: 240 µA (baseline performance metric)
Current - Output / Channel: 20 mA (baseline performance metric)

Substitute parts may exceed these baseline performance metrics. Parts with different package types (8-DIP, 8-DFN, TO-220-5) are classified as functional equivalents suitable for alternative mounting configurations but require PCB redesign.

Parameter Comparison

Parameter	TLE2021IDR	AD817ARZ	AD817ARZ-REEL	AD817ARZ-REEL7	Unit
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	—
Number of Circuits	1	1	1	1	—
Slew Rate	0.65	350	350	350	V/µs
Gain Bandwidth Product	2	50	50	50	MHz
Current - Input Bias	25	3.3	3.3	3.3	µA
Voltage - Input Offset	120	500	500	500	µV
Current - Supply	240	7000	7000	7000	µA
Current - Output / Channel	20	50	50	50	mA
Voltage - Supply Span (Min)	4	5	5	5	V
Voltage - Supply Span (Max)	40	36	36	36	V
Operating Temperature	-40 to 85	-45 to 85	-40 to 85	-40 to 85	°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	—
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (8-SOIC Surface Mount):

The AD817ARZ, AD817ARZ-REEL, and AD817ARZ-REEL7 are direct pin-compatible substitutes for the TLE2021IDR in 8-SOIC surface-mount packages. All three variants are manufactured by Analog Devices Inc., classified as active products, and maintain ROHS3 compliance with MSL 1 rating.

Packaging Variants:

AD817ARZ: Tube packaging, 2669 units in stock
AD817ARZ-REEL: Cut Tape & Digi-Reel® packaging, 17905 units in stock
AD817ARZ-REEL7: Cut Tape & Digi-Reel® packaging, 17686 units in stock

The AD817ARZ-REEL and AD817ARZ-REEL7 variants are functionally identical and differ only in reel configuration. Both provide significantly higher inventory availability compared to the tube-packaged AD817ARZ.

Performance Characteristics: The AD817 series exhibits superior electrical performance compared to the TLE2021IDR across all measured parameters: 350 V/µs slew rate (versus 0.65 V/µs), 50 MHz gain bandwidth product (versus 2 MHz), and 50 mA output current per channel (versus 20 mA). Input bias current is lower at 3.3 µA compared to 25 nA, and input offset voltage is higher at 500 µV compared to 120 µV.

Supply Voltage Consideration: The AD817 series operates with a minimum supply voltage of 5 V, compared to 4 V for the TLE2021IDR. Applications requiring 4 V operation must retain the TLE2021IDR or select alternative substitutes with 4 V minimum specification.

Alternative Package Formats:

The AD817ANZ (8-DIP through-hole package) provides functional equivalence with different mounting requirements. The LT1010 series (buffer amplifiers in multiple packages) and LT1077ACN8#PBF (general-purpose amplifier in 8-DIP) are functional alternatives with different electrical characteristics and package formats.

Frequently Asked Questions (FAQ)

Q: Can the AD817ARZ directly replace the TLE2021IDR without PCB modification?

A: Yes. The AD817ARZ, AD817ARZ-REEL, and AD817ARZ-REEL7 are pin-compatible substitutes in identical 8-SOIC surface-mount packages. No PCB redesign is required for these three variants.

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

A: Both variants are functionally identical general-purpose amplifiers in 8-SOIC packages with identical electrical specifications. The designation difference reflects reel configuration for automated assembly processes. Selection between these variants depends on manufacturing equipment compatibility.

Q: Why does the AD817 series have higher supply current (7 mA) compared to the TLE2021IDR (240 µA)?

A: The AD817 series is designed for higher-performance applications with superior slew rate (350 V/µs versus 0.65 V/µs) and gain bandwidth product (50 MHz versus 2 MHz). Increased supply current is a direct result of this enhanced performance specification.

Q: Can I use the AD817ANZ (8-DIP) as a substitute for the TLE2021IDR?

A: The AD817ANZ is a functional equivalent with identical electrical specifications to the AD817ARZ but requires through-hole mounting instead of surface-mount. PCB redesign is necessary to accommodate the different package format and pin spacing (0.300" for 8-DIP versus 0.154" for 8-SOIC).

Q: What is the minimum supply voltage requirement for AD817 substitutes?

A: The AD817 series requires a minimum supply voltage of 5 V. The TLE2021IDR operates at 4 V minimum. Applications with 4 V supply rails cannot use AD817 substitutes without supply voltage modification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (AD817 series, LT1010 series, and LT1077ACN8#PBF) are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity level, matching the TLE2021IDR compliance status.

Q: What is the operating temperature range difference between TLE2021IDR and AD817ARZ?

A: The TLE2021IDR operates from -40°C to 85°C. The AD817ARZ operates from -45°C to 85°C, providing extended low-temperature operation. The AD817ARZ-REEL and AD817ARZ-REEL7 variants operate from -40°C to 85°C, matching the TLE2021IDR specification.

Q: Can I substitute the LT1010 buffer amplifier for the TLE2021IDR?

A: No. The LT1010 is classified as a buffer amplifier, not a general-purpose amplifier. While both are single-circuit operational amplifiers, the LT1010 has different electrical characteristics (75 V/µs slew rate, 20 MHz gain bandwidth product, 500 µA input bias current) and is designed for buffering applications rather than general-purpose amplification.

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