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TL064ACD Equivalent & Substitute Parts
Part Overview
The TL064ACD is a J-FET input operational amplifier integrated circuit containing four independent amplifier circuits in a 14-SOIC surface mount package. This device is manufactured by Texas Instruments and is designated as Last Time Buy, indicating discontinued production with limited inventory availability. The TL064ACD operates across a supply voltage range of 10V to 30V with an operating temperature range of 0°C to 70°C, making it suitable for precision analog signal processing applications requiring low input bias current and low input offset voltage characteristics.
Due to its Last Time Buy status, equivalent and substitute parts are necessary for design continuity, long-term production support, and component availability assurance.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | J-FET | — |
| Number of Circuits | 4 | — |
| Slew Rate | 3.5 | V/µs |
| Gain Bandwidth Product | 1 | MHz |
| Current - Input Bias | 30 | pA |
| Voltage - Input Offset | 3 | mV |
| Current - Supply (per 4 Channels) | 200 | µA |
| Voltage - Supply Span (Min) | 10 | V |
| Voltage - Supply Span (Max) | 30 | V |
| Operating Temperature Range | 0 to 70 | °C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the TL064ACD is determined by the following critical parameters: amplifier type (J-FET vs. General Purpose), number of circuits (4), package type (14-SOIC), supply voltage range compatibility, input bias current, input offset voltage, slew rate, and gain bandwidth product.
Substitute parts are grouped into two categories:
Category 1: Direct J-FET Equivalents — Parts maintaining J-FET amplifier topology with identical or superior electrical performance characteristics. These include TL064ACDR (Texas Instruments, Tape & Reel packaging), TL064IDT (STMicroelectronics), LF247DT (STMicroelectronics), LF347D (STMicroelectronics), and LF347DT (STMicroelectronics). These substitutes preserve the low input bias current (20–30 pA) and J-FET input stage characteristics essential for high-impedance signal sources.
Category 2: General Purpose Alternatives — Parts utilizing general purpose amplifier topology with different electrical characteristics. These include AS324AMTR-E1, AS324AMTR-G1, AS324MTR-E1 (Diodes Incorporated), LM124DT (STMicroelectronics), and LM224ADT (STMicroelectronics). These substitutes feature higher input bias current (20 nA) and broader supply voltage ranges but maintain the four-circuit configuration and 14-SOIC package footprint.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA/nA) | Input Offset (mV) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Product Status | Packaging |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TL064ACD | Texas Instruments | J-FET | 3.5 | 1 | 30 pA | 3 | 10 | 30 | 0 to 70 | Last Time Buy | Tube |
| TL064ACDR | Texas Instruments | J-FET | 3.5 | 1 | 30 pA | 3 | 10 | 30 | 0 to 70 | Active | Tape & Reel |
| TL064IDT | STMicroelectronics | J-FET | 3.5 | 1 | 30 pA | 3 | 6 | 36 | -40 to 105 | Active | Cut Tape & Digi-Reel |
| AS324AMTR-E1 | Diodes Incorporated | General Purpose | — | — | 20 nA | 2 | 3 | 36 | -40 to 85 | Active | Tape & Reel |
| AS324AMTR-G1 | Diodes Incorporated | General Purpose | — | — | 20 nA | 2 | 3 | 36 | -40 to 85 | Active | Tape & Reel |
| AS324MTR-E1 | Diodes Incorporated | General Purpose | — | — | 20 nA | 2 | 3 | 36 | -40 to 85 | Active | Tape & Reel |
| LF247DT | STMicroelectronics | J-FET | 16 | 4 | 20 pA | 3 | 44 | 44 | -40 to 105 | Active | Cut Tape & Digi-Reel |
| LF347D | STMicroelectronics | J-FET | 16 | 3 | 20 pA | 3 | 44 | 44 | 0 to 70 | Active | Tube |
| LF347DT | STMicroelectronics | J-FET | 16 | 4 | 20 pA | 3 | 44 | 44 | 0 to 70 | Active | Cut Tape & Digi-Reel |
| LM124DT | STMicroelectronics | General Purpose | 0.4 | 1.3 | 20 nA | 2 | 3 | 30 | -55 to 125 | Active | Cut Tape & Digi-Reel |
| LM224ADT | STMicroelectronics | General Purpose | 0.4 | 1.3 | 20 nA | 2 | 3 | 30 | -40 to 105 | Active | Cut Tape & Digi-Reel |
Engineering Selection Recommendations
For Direct Replacement (Identical Electrical Performance):
The TL064ACDR is the primary direct equivalent, manufactured by Texas Instruments with identical electrical specifications to the TL064ACD. The only difference is packaging format: TL064ACDR is supplied in Tape & Reel format versus Tube for the original part. Both maintain Active product status with full availability. This substitution requires no circuit redesign and is suitable for immediate implementation.
The TL064IDT (STMicroelectronics) provides J-FET amplifier topology with identical core electrical characteristics (3.5V/µs slew rate, 1 MHz gain bandwidth product, 30 pA input bias current). This part extends the supply voltage range to 6V–36V and operating temperature to -40°C to 105°C, offering enhanced environmental performance. TL064IDT is Active status with high inventory availability.
For Enhanced Performance Applications:
The LF247DT and LF347DT (STMicroelectronics) are J-FET amplifiers with superior slew rate (16V/µs) and gain bandwidth product (4 MHz), providing faster signal response. However, these parts require a fixed ±22V supply (44V span total), which differs from the TL064ACD's 10V–30V range. These substitutes are suitable only for applications with compatible power supply architecture.
For General Purpose Applications with Relaxed Input Impedance Requirements:
The AS324AMTR-E1, AS324AMTR-G1, and AS324MTR-E1 (Diodes Incorporated) and LM124DT, LM224ADT (STMicroelectronics) are general purpose amplifiers with four circuits in 14-SOIC packages. These parts feature higher input bias current (20 nA versus 30 pA) and lower slew rates (0.4V/µs for LM series), making them unsuitable for high-impedance signal sources or high-speed applications. These alternatives are appropriate only when input impedance and slew rate requirements are not critical.
All substitute parts listed maintain ROHS3 compliance, Moisture Sensitivity Level 1 (except AS324AMTR-G1 and AS324MTR-E1 with MSL 3), and REACH Unaffected status, ensuring regulatory compliance equivalent to the original part.
Frequently Asked Questions (FAQ)
Q: Can TL064ACDR be used as a direct drop-in replacement for TL064ACD?
A: Yes. TL064ACDR is electrically identical to TL064ACD with all specifications matching exactly. The only difference is packaging format: TL064ACDR uses Tape & Reel while TL064ACD uses Tube. Both are manufactured by Texas Instruments and require no circuit modifications.
Q: What is the primary difference between J-FET and General Purpose amplifier substitutes?
A: J-FET amplifiers (TL064ACDR, TL064IDT, LF247DT, LF347D, LF347DT) feature input bias current in the picoampere range (20–30 pA), making them suitable for high-impedance signal sources. General Purpose amplifiers (AS324 series, LM124DT, LM224ADT) have input bias current in the nanoampere range (20 nA), approximately 1000 times higher, and are suitable only for applications where input impedance is not critical.
Q: Can LF247DT or LF347DT replace TL064ACD in existing designs?
A: LF247DT and LF347DT are J-FET amplifiers with superior performance (16V/µs slew rate, 4 MHz gain bandwidth product) but require a fixed ±22V dual supply (44V total span). The TL064ACD operates on 10V–30V single or dual supply. These substitutes are compatible only if the power supply architecture is modified to provide ±22V.
Q: Are the AS324 and LM series suitable replacements for the TL064ACD?
A: AS324 and LM series are general purpose amplifiers with different electrical characteristics. They are suitable only for applications where the TL064ACD's low input bias current (30 pA) and J-FET input stage are not required. These alternatives are not recommended for high-impedance signal conditioning or precision analog applications.
Q: What is the significance of the TL064ACD's Last Time Buy status?
A: Last Time Buy status indicates that Texas Instruments has discontinued production of the TL064ACD. Existing inventory is limited. TL064ACDR (Active status) is the recommended long-term replacement to ensure continued component availability for production and field service applications.
Q: Do all substitute parts maintain the same package footprint?
A: Yes. All substitute parts listed use the 14-SOIC (0.154", 3.90mm width) package with identical pin configuration and PCB footprint. Physical board-level compatibility is maintained across all substitutes.
Q: What is the difference between Cut Tape & Digi-Reel and Tape & Reel packaging?
A: Both are tape-based packaging formats suitable for automated assembly. Cut Tape & Digi-Reel is supplied on standard tape with optional Digi-Reel carrier for high-volume production. Tape & Reel is standard reel format. Both formats are compatible with standard pick-and-place equipment. Selection depends on production volume and assembly line configuration.
Q: Are there compliance or certification differences between the main part and substitutes?
A: All parts listed maintain ROHS3 compliance and REACH Unaffected status. Moisture Sensitivity Level differs for some Diodes Incorporated parts (MSL 3 versus MSL 1), indicating different moisture absorption characteristics. MSL 3 parts require controlled humidity storage and handling procedures.
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