TLE2021ACDR Equivalent & Substitute Parts

Part Overview

The TLE2021ACDR is a general-purpose operational amplifier manufactured by Texas Instruments in the Excalibur™ series. This single-circuit, 8-SOIC surface-mount device operates across a 4V to 40V supply range and is designed for applications requiring low-power amplification with moderate bandwidth characteristics. The device is Active status and RoHS3 compliant.

Substitute parts are necessary when the TLE2021ACDR becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications permit higher performance parameters. The substitute parts listed maintain functional compatibility through equivalent circuit topology while offering variations in electrical performance, packaging, and thermal characteristics.

Key Parameters

Parameter	TLE2021ACDR	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	0°C ~ 70°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 TLE2021ACDR are grouped based on the following substitution criteria:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 1
Package compatibility: 8-SOIC surface-mount form factor
Supply voltage range: Minimum 4V, Maximum 40V
Operating temperature overlap: 0°C to 70°C minimum
RoHS3 compliance and MSL Level 1 rating

Grouping Logic:

Group 1 - Direct Package Match (8-SOIC Surface Mount): Parts AD817ARZ, AD817ARZ-REEL, and AD817ARZ-REEL7 maintain identical 8-SOIC packaging and surface-mount configuration. These devices offer significantly higher slew rate (350V/µs vs. 0.65V/µs) and gain bandwidth product (50 MHz vs. 1.7 MHz), with extended operating temperature ranges.

Group 2 - Alternative Surface Mount Packages: LT1008S8#PBF provides 8-SOIC packaging with comparable low slew rate (0.2V/µs) and similar supply current characteristics, suitable for applications prioritizing low-speed operation.

Group 3 - Through-Hole Alternatives: AD817ANZ offers 8-DIP through-hole packaging for applications requiring traditional PCB assembly methods, with equivalent electrical performance to AD817ARZ variants.

Group 4 - Buffer Amplifier Variants: LT1010 series devices (LT1010CDD#PBF, LT1010CDD#TRPBF, LT1010CN8#PBF, LT1010CT#06PBF, LT1010CT#PBF) represent buffer amplifier topology with higher output current capability (150 mA) and extended temperature range (0°C to 100°C), available in multiple package formats.

Parameter Comparison

Parameter	TLE2021ACDR	AD817ANZ	AD817ARZ	AD817ARZ-REEL	AD817ARZ-REEL7	LT1008S8#PBF	Unit
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	0.65	350	350	350	350	0.2	V/µs
Gain Bandwidth Product	1.7	50	50	50	50	—	MHz
Current - Input Bias	25	3300	3300	3300	3300	0.1	nA
Voltage - Input Offset	80	500	500	500	500	30	µV
Current - Supply	240	7000	7000	7000	7000	380	µA
Current - Output / Channel	20	50	50	50	50	—	mA
Voltage - Supply Span (Min)	4	5	5	5	5	4	V
Voltage - Supply Span (Max)	40	36	36	36	36	36	V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-45°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	—
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	—

Engineering Selection Recommendations

For Direct 8-SOIC Surface-Mount Replacement:

The AD817ARZ, AD817ARZ-REEL, and AD817ARZ-REEL7 provide pin-compatible substitution in 8-SOIC packaging. All three variants are manufactured by Analog Devices Inc., maintain Active product status, and carry ROHS3 compliance with MSL Level 1 rating. Selection between these three depends on packaging format requirements: AD817ARZ for tube packaging, AD817ARZ-REEL and AD817ARZ-REEL7 for tape-and-reel formats suitable for automated assembly.

The AD817 series exhibits higher electrical performance (350V/µs slew rate, 50 MHz bandwidth) compared to the TLE2021ACDR. The minimum supply voltage is 5V (versus 4V for TLE2021ACDR), and maximum supply voltage is 36V (versus 40V). Operating temperature range extends to -45°C to 85°C, providing broader environmental coverage than the TLE2021ACDR's 0°C to 70°C range.

For Through-Hole Assembly:

The AD817ANZ provides equivalent electrical performance to the AD817ARZ in 8-DIP through-hole packaging. This device is suitable for applications requiring traditional PCB assembly methods or prototype development. Operating temperature range is -40°C to 85°C with 5V to 36V supply span.

For Low-Speed, Low-Bias-Current Applications:

The LT1008S8#PBF maintains 8-SOIC surface-mount packaging with slew rate of 0.2V/µs and input bias current of 100 pA, offering superior low-frequency characteristics. Supply current is 380µA with operating temperature range of 0°C to 70°C, matching the TLE2021ACDR's thermal envelope. Supply voltage range is 4V to 36V.

For Buffer Amplifier Applications:

The LT1010 series devices provide buffer amplifier topology with 75V/µs slew rate and 20 MHz gain bandwidth product. Output current capability reaches 150 mA, significantly exceeding the TLE2021ACDR's 20 mA. Operating temperature extends to 0°C to 100°C. Available in multiple packages: 8-DFN (LT1010CDD#PBF, LT1010CDD#TRPBF), 8-DIP (LT1010CN8#PBF), and TO-220-5 (LT1010CT#06PBF, LT1010CT#PBF). These devices are suitable for applications requiring higher output drive capability.

All recommended substitutes maintain RoHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can AD817ARZ directly replace TLE2021ACDR in existing PCB designs?

A: Yes, for surface-mount applications. Both devices use 8-SOIC packaging with identical 0.154" (3.90mm) width. Pin configuration is compatible for general-purpose amplifier applications. However, verify that the 5V minimum supply voltage requirement of AD817ARZ meets your circuit's minimum supply specification, as TLE2021ACDR operates at 4V minimum.

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

A: These three parts are electrically identical. The differences are packaging formats: AD817ARZ is supplied in tube packaging, while AD817ARZ-REEL and AD817ARZ-REEL7 are supplied in cut tape and Digi-Reel® formats. Selection depends on assembly equipment compatibility and volume requirements. AD817ARZ-REEL has higher inventory availability (17,905 units) compared to AD817ARZ-REEL7 (17,686 units).

Q: Why does AD817 series have higher slew rate and bandwidth than TLE2021ACDR?

A: The AD817 is designed for higher-frequency applications with 350V/µs slew rate and 50 MHz bandwidth, compared to TLE2021ACDR's 0.65V/µs and 1.7 MHz. This represents a different design philosophy: AD817 prioritizes speed and transient response, while TLE2021ACDR prioritizes low-power operation (240µA vs. 7mA supply current). Select based on application bandwidth requirements.

Q: Is LT1008S8#PBF suitable as a TLE2021ACDR replacement?

A: LT1008S8#PBF is suitable for applications where low slew rate (0.2V/µs) and extremely low input bias current (100 pA) are beneficial. It maintains 8-SOIC packaging and 0°C to 70°C operating range. However, supply current is higher (380µA vs. 240µA). Use this substitute when precision and low-bias characteristics are prioritized over power consumption.

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

A: LT1010 devices are buffer amplifiers with 150 mA output current capability, compared to 20 mA for TLE2021ACDR. Use LT1010 when driving low-impedance loads or requiring high output current. LT1010 operates across 4.5V to 40V supply range and 0°C to 100°C temperature range, providing extended thermal coverage. Available in multiple packages: 8-DFN, 8-DIP, and TO-220-5.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (AD817 series, LT1008S8#PBF, and LT1010 series) are RoHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching TLE2021ACDR compliance status.

Q: What is the inventory status of substitute parts?

A: AD817ARZ-REEL has the highest inventory (17,905 units), followed by AD817ARZ-REEL7 (17,686 units) and AD817ANZ (4,932 units). LT1008S8#PBF has 1,221 units. LT1010 variants range from 1,267 to 6,195 units depending on package type. Verify current availability with your supplier for production requirements.

Q: Can I use through-hole AD817ANZ in a surface-mount PCB design?

A: No. AD817ANZ is through-hole 8-DIP package, requiring PCB holes and different assembly process than surface-mount designs. Use surface-mount alternatives (AD817ARZ, AD817ARZ-REEL, AD817ARZ-REEL7, or LT1008S8#PBF) for surface-mount PCBs. AD817ANZ is suitable for prototype boards or legacy through-hole designs.

Q: What are the key electrical differences between TLE2021ACDR and AD817ARZ?

A: Primary differences are slew rate (0.65V/µs vs. 350V/µs), gain bandwidth product (1.7 MHz vs. 50 MHz), input bias current (25 nA vs. 3.3 µA), supply current (240µA vs. 7mA), and output current (20 mA vs. 50 mA). AD817ARZ is a higher-performance device suitable for faster applications. TLE2021ACDR is optimized for low-power, low-frequency circuits.

Q: Is supply voltage compatibility critical when substituting parts?

A: Yes. TLE2021ACDR operates at 4V minimum, while AD817 series requires 5V minimum. If your circuit uses 4V to 5V supply, verify AD817 compatibility. LT1008S8#PBF and LT1010 series maintain 4V minimum, providing direct compatibility with lower supply voltages. Always confirm minimum supply voltage requirements for your application.

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