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TLC27L2ACD Equivalent & Substitute Parts
Part Overview
The TLC27L2ACD is a CMOS amplifier integrated circuit manufactured by Texas Instruments, configured as a dual-channel operational amplifier in an 8-SOIC surface mount package. This device operates within a 3V to 16V supply voltage range and is specified for industrial and consumer applications requiring low-power amplification with minimal input bias current.
The TLC27L2ACD carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production. This status necessitates identification of equivalent and substitute parts to ensure design continuity and procurement availability for ongoing production requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | CMOS | — |
| Number of Circuits | 2 | — |
| Slew Rate | 0.03 | V/µs |
| Gain Bandwidth Product | 110 | kHz |
| Current - Input Bias | 0.6 | pA |
| Voltage - Input Offset | 900 | µV |
| Current - Supply (per Channel) | 20 | µA |
| Current - Output / Channel | 30 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 16 | V |
| Operating Temperature | 0 to 70 | °C |
| Package / Case | 8-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 TLC27L2ACD is determined by electrical and mechanical compatibility across the following critical parameters:
Electrical Compatibility Criteria:
- Amplifier Type: CMOS technology
- Number of Circuits: Dual-channel configuration
- Supply Voltage Range: 3V to 16V minimum and maximum
- Package / Case: 8-SOIC form factor with 0.154" (3.90mm) width
- Mounting Type: Surface Mount
Functional Performance Parameters:
- Slew Rate: 0.03V/µs to 0.04V/µs range
- Gain Bandwidth Product: 100 kHz to 110 kHz range
- Input Bias Current: 0.6 pA to 1 pA range
- Input Offset Voltage: 900 µV to 1.1 mV range
- Supply Current: 10µA to 20µA per channel
- Output Current: 30 mA to 45 mA per channel
Substitute parts are grouped into two categories:
Category 1 - Direct Equivalents (Texas Instruments LinCMOS™ Series): Parts maintaining identical electrical specifications and series designation. These include TLC27L2ACDR (Active, reel packaging) and TLC27L7CD (Last Time Buy status).
Category 2 - Functional Alternatives (STMicroelectronics TS272/TS27L2 Series): Parts with enhanced performance characteristics (higher slew rate, higher gain bandwidth product, higher output current) while maintaining core compatibility parameters. These include TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, TS272IDT, TS27L2ACDT, and TS27L2AIDT.
Category 3 - Legacy Alternative (Texas Instruments General Purpose Series): The LM432MA/NOPB represents a general-purpose amplifier alternative with different electrical characteristics and obsolete status.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Slew Rate (V/µs) | GBW (kHz) | Input Bias (pA) | Input Offset (µV) | Supply Current (µA) | Output Current (mA) | Temp Range (°C) | Product Status | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TLC27L2ACD | Texas Instruments | CMOS | 0.03 | 110 | 0.6 | 900 | 20 | 30 | 0 to 70 | Last Time Buy | 8-SOIC |
| TLC27L2ACDR | Texas Instruments | CMOS | 0.03 | 110 | 0.6 | 900 | 20 | 30 | 0 to 70 | Active | 8-SOIC |
| TLC27L7CD | Texas Instruments | CMOS | 0.03 | 110 | 0.6 | 1100 | 20 | 30 | 0 to 70 | Last Time Buy | 8-SOIC |
| TS272ACDT | STMicroelectronics | CMOS | 5.5 | 3500 | 1 | 900 | 1 | 45 | 0 to 70 | Active | 8-SOIC |
| TS272AIDT | STMicroelectronics | CMOS | 5.5 | 3500 | 1 | 900 | 1 | 45 | -40 to 125 | Active | 8-SOIC |
| TS272BIDT | STMicroelectronics | CMOS | 5.5 | 3500 | 1 | 250 | 1 | 45 | -40 to 125 | Active | 8-SOIC |
| TS272CDT | STMicroelectronics | CMOS | 5.5 | 3500 | 1 | 1100 | 1 | 45 | 0 to 70 | Active | 8-SOIC |
| TS272IDT | STMicroelectronics | CMOS | 5.5 | 3500 | 1 | 1100 | 1 | 45 | -40 to 125 | Active | 8-SOIC |
| TS27L2ACDT | STMicroelectronics | CMOS | 0.04 | 100 | 1 | 900 | 10 | 45 | 0 to 70 | Active | 8-SOIC |
| TS27L2AIDT | STMicroelectronics | CMOS | 0.04 | 100 | 1 | 1100 | 10 | 45 | -40 to 125 | Active | 8-SOIC |
| LM432MA/NOPB | Texas Instruments | General Purpose | — | 1000 | 3 | 600 | 150 | 30 | -40 to 85 | Obsolete | 8-SOIC |
Engineering Selection Recommendations
Primary Recommendation: TLC27L2ACDR
The TLC27L2ACDR is the manufacturer-recommended direct equivalent to the TLC27L2ACD. This part maintains identical electrical specifications across all critical parameters including slew rate, gain bandwidth product, input bias current, and supply current. The TLC27L2ACDR carries Active product status, ensuring long-term availability and continued manufacturing support. Both parts are ROHS3 compliant with MSL 1 rating. The primary distinction is packaging format: TLC27L2ACDR is supplied in Cut Tape and Digi-Reel format, whereas the original TLC27L2ACD is supplied in Tube format. This substitution requires no circuit redesign or validation.
Secondary Recommendation: TS27L2ACDT (STMicroelectronics)
The TS27L2ACDT provides functional equivalence with minimal electrical deviation. This part maintains the low-power supply current characteristic (10µA per channel) and operates within the same temperature range (0°C to 70°C) as the original. The slew rate (0.04V/µs) and gain bandwidth product (100 kHz) are within acceptable tolerance of the TLC27L2ACD specifications. The TS27L2ACDT carries Active product status with higher inventory availability. Output current capability is increased to 45 mA. This substitution is suitable for applications where the enhanced output current does not create thermal or power dissipation concerns.
Extended Temperature Alternative: TS27L2AIDT (STMicroelectronics)
The TS27L2AIDT extends the operating temperature range to -40°C to 125°C while maintaining electrical specifications comparable to the TLC27L2ACD. This part is appropriate for applications requiring extended temperature operation beyond the original 0°C to 70°C specification. Active product status and high inventory availability support procurement reliability.
High-Performance Alternative: TS272 Series (STMicroelectronics)
The TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, and TS272IDT represent enhanced-performance alternatives with significantly higher slew rate (5.5V/µs) and gain bandwidth product (3.5 MHz). These parts are suitable for applications requiring faster signal processing or higher frequency response. Supply current is reduced to 1µA per channel, providing power efficiency advantages. Output current is increased to 45 mA. All TS272 variants carry Active product status. Selection among TS272 variants depends on temperature range requirements and input offset voltage specifications.
Not Recommended: LM432MA/NOPB
The LM432MA/NOPB carries Obsolete product status and exhibits significantly different electrical characteristics, including substantially higher supply current (150µA per channel) and higher input bias current (3 nA). This part is not recommended for new designs or as a substitute for the TLC27L2ACD.
Frequently Asked Questions (FAQ)
Q: Can the TLC27L2ACDR be used as a direct replacement for the TLC27L2ACD in existing designs?
A: Yes. The TLC27L2ACDR is electrically and functionally identical to the TLC27L2ACD. The only difference is packaging format (Cut Tape/Digi-Reel versus Tube). No circuit modifications or re-validation are required. Both parts are ROHS3 compliant with identical MSL ratings.
Q: What is the primary advantage of substituting with TS27L2ACDT instead of TLC27L2ACDR?
A: The TS27L2ACDT carries Active product status with significantly higher inventory availability (10,400 pieces in stock versus 5,200 for TLC27L2ACDR). Electrical specifications are nearly identical, with slew rate and gain bandwidth product within acceptable tolerance. The TS27L2ACDT is manufactured by STMicroelectronics, providing supply chain diversification.
Q: Are the TS272 series parts suitable replacements for the TLC27L2ACD?
A: The TS272 series provides functional substitution with enhanced performance characteristics. Slew rate is increased 183-fold (5.5V/µs versus 0.03V/µs), and gain bandwidth product is increased 32-fold (3.5 MHz versus 110 kHz). Supply current is reduced to 1µA per channel. These parts are suitable for applications where higher performance does not create design complications. Applications with strict bandwidth or slew rate limitations may require circuit re-evaluation.
Q: What is the significance of the Last Time Buy status on the TLC27L2ACD?
A: Last Time Buy status indicates that Texas Instruments has ceased active production and will not accept new orders after a specified date. Existing inventory will be depleted. Designs currently using the TLC27L2ACD must transition to an alternative part. The TLC27L2ACDR (Active status) is the manufacturer-recommended transition path.
Q: Can I use TS272BIDT if my application requires lower input offset voltage?
A: Yes. The TS272BIDT specifies input offset voltage of 250 µV, compared to 900 µV for the TLC27L2ACD. This part is suitable for precision applications requiring tighter offset voltage tolerance. The TS272BIDT operates across the extended temperature range (-40°C to 125°C) and carries Active product status.
Q: What packaging considerations apply when substituting TLC27L2ACD with TS27L2ACDT?
A: Both parts use the 8-SOIC package with identical 0.154" (3.90mm) width. Pin-to-pin compatibility is maintained. The primary packaging difference is the supply format: TLC27L2ACD is supplied in Tube format, while TS27L2ACDT is supplied in Tape & Reel format. No PCB layout modifications are required.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed carry ROHS3 compliance status. All parts also carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original TLC27L2ACD specification.
Q: Which substitute part offers the best long-term availability?
A: The TS272CDT and TS272IDT offer the highest inventory levels (17,007 and 21,553 pieces respectively) and carry Active product status. These parts provide the strongest long-term procurement assurance. However, their enhanced performance characteristics may not be necessary for all applications.
Q: Can I substitute TLC27L2ACD with LM432MA/NOPB?
A: No. The LM432MA/NOPB carries Obsolete product status and exhibits substantially different electrical characteristics. Supply current is 7.5 times higher (150µA versus 20µA per channel), and input bias current is 5,000 times higher (3 nA versus 0.6 pA). This part is not suitable as a substitute.
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