TLC27L2ACDG4 Equivalent & Substitute Parts

Part Overview

The TLC27L2ACDG4 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 is part of the LinCMOS™ series and is classified as discontinued at DiGi Electronics. The product status indicates that this component is no longer actively supported through primary distribution channels, necessitating identification of functionally equivalent substitute parts for ongoing design requirements and production needs.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLC27L2ACDG4
Manufacturer	Texas Instruments
Amplifier Type	CMOS
Number of Circuits	2
Package / Case	8-SOIC (0.154", 3.90mm Width)
Slew Rate	0.03 V/µs
Gain Bandwidth Product	110 kHz
Current - Input Bias	0.6 pA
Voltage - Input Offset	900 µV
Current - Supply	20 µA (x2 Channels)
Current - Output / Channel	30 mA
Voltage - Supply Span (Min)	3 V
Voltage - Supply Span (Max)	16 V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TLC27L2ACDG4 is determined by strict compatibility across the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC surface mount package (0.154", 3.90mm Width) to ensure mechanical and electrical compatibility with existing PCB layouts.

Amplifier Configuration: Substitute parts must be dual-channel CMOS amplifiers to maintain circuit functionality and pin compatibility.

Supply Voltage Range: Substitute parts must support the 3 V to 16 V supply voltage span to operate within the same power distribution architecture.

Output Current Capability: Substitute parts must provide minimum 30 mA output current per channel to meet load driving requirements.

Input Bias Current: Substitute parts must maintain input bias current specifications compatible with high-impedance input circuits.

Voltage - Input Offset: Substitute parts must maintain input offset voltage within acceptable ranges for the application.

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

Category 1 - Direct CMOS Replacements (TLC27L2 Series): Parts maintaining the original TLC27L2 base product specifications with identical slew rate and gain bandwidth product characteristics.

Category 2 - Enhanced Performance CMOS Alternatives (TS272 Series): Parts offering improved slew rate (5.5 V/µs) and gain bandwidth product (3.5 MHz) while maintaining CMOS amplifier topology and package compatibility.

Category 3 - General Purpose Alternative (LM432MA/NOPB): A general purpose amplifier option with different performance characteristics but compatible package and supply voltage specifications.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (kHz/MHz)	Input Bias (pA/nA)	Input Offset (µV/mV)	Supply Current (µA/mA)	Output Current (mA)	Temp Range (°C)	Product Status
TLC27L2ACDG4	Texas Instruments	CMOS	0.03	110 kHz	0.6 pA	900 µV	20 µA	30	0 ~ 70	Discontinued
TLC27L2ACD	Texas Instruments	CMOS	0.03	110 kHz	0.6 pA	900 µV	20 µA	30	0 ~ 70	Last Time Buy
TS27L2ACDT	STMicroelectronics	CMOS	0.04	100 kHz	1 pA	900 µV	10 µA	45	0 ~ 70	Active
TS27L2AIDT	STMicroelectronics	CMOS	0.04	100 kHz	1 pA	1.1 mV	10 µA	45	-40 ~ 125	Active
TS27L2BIDT	STMicroelectronics	CMOS	0.04	100 kHz	1 pA	250 µV	10 µA	45	-40 ~ 125	Active
TS272ACDT	STMicroelectronics	CMOS	5.5	3.5 MHz	1 pA	900 µV	1 mA	45	0 ~ 70	Active
TS272AIDT	STMicroelectronics	CMOS	5.5	3.5 MHz	1 pA	900 µV	1 mA	45	-40 ~ 125	Active
TS272BIDT	STMicroelectronics	CMOS	5.5	3.5 MHz	1 pA	250 µV	1 mA	45	-40 ~ 125	Active
TS272CDT	STMicroelectronics	CMOS	5.5	3.5 MHz	1 pA	1.1 mV	1 mA	45	0 ~ 70	Active
TS272IDT	STMicroelectronics	CMOS	5.5	3.5 MHz	1 pA	1.1 mV	1 mA	45	-40 ~ 125	Active
LM432MA/NOPB	Texas Instruments	General Purpose	—	1 MHz	3 nA	600 µV	150 µA	30	-40 ~ 85	Obsolete

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The TLC27L2ACD represents the most direct substitute for the TLC27L2ACDG4. Both parts share identical electrical specifications, CMOS amplifier topology, and operating temperature range. The TLC27L2ACD is designated as Last Time Buy status, indicating continued availability through distribution channels with defined end-of-life parameters. This part maintains the original slew rate of 0.03 V/µs and gain bandwidth product of 110 kHz.

Secondary Substitutes (TS27L2 Series - STMicroelectronics):

The TS27L2ACDT, TS27L2AIDT, and TS27L2BIDT parts from STMicroelectronics provide active product status with extended availability. These parts maintain the low-power CMOS amplifier characteristics with slightly reduced supply current (10 µA versus 20 µA) and improved output current capability (45 mA versus 30 mA). The TS27L2 series variants differ in input offset voltage specifications and operating temperature ranges. TS27L2AIDT and TS27L2BIDT extend the operating temperature range to -40°C ~ 125°C, suitable for industrial applications.

Tertiary Substitutes (TS272 Series - STMicroelectronics):

The TS272 series (TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, TS272IDT) offers enhanced performance characteristics with significantly higher slew rate (5.5 V/µs) and gain bandwidth product (3.5 MHz). These parts are suitable for applications requiring faster signal processing. However, supply current increases to 1 mA per channel. Multiple variants provide temperature range options from 0°C ~ 70°C to -40°C ~ 125°C and input offset voltage selections.

Alternative Option (LM432MA/NOPB):

The LM432MA/NOPB is a general purpose amplifier with obsolete product status. While it maintains 8-SOIC package compatibility and 3 V to 16 V supply voltage range, it exhibits significantly higher supply current (150 µA) and different input bias current characteristics (3 nA). This part is not recommended for new designs due to obsolete status.

Compliance Considerations:

All recommended substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, consistent with the original TLC27L2ACDG4. All parts carry EAR99 ECCN classification and REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the TS272 series directly replace the TLC27L2ACDG4 in existing designs?

A: The TS272 series provides mechanical and electrical compatibility through identical 8-SOIC packaging and overlapping supply voltage specifications. However, the significantly higher slew rate (5.5 V/µs versus 0.03 V/µs) and gain bandwidth product (3.5 MHz versus 110 kHz) represent substantial performance differences. Circuit behavior may change in applications sensitive to frequency response or signal settling time. Verification through circuit simulation or prototype testing is necessary before production implementation.

Q: What is the difference between TS27L2ACDT and TS27L2AIDT?

A: Both parts are STMicroelectronics TS27L2 series amplifiers with identical electrical performance. The primary difference is operating temperature range: TS27L2ACDT operates from 0°C to 70°C, while TS27L2AIDT extends to -40°C to 125°C. Selection depends on the target application environment. Industrial and automotive applications typically require the extended temperature range of the TS27L2AIDT.

Q: Why does the TS27L2BIDT have lower input offset voltage (250 µV) compared to other variants?

A: Input offset voltage is a manufacturing parameter that varies across device grades within the same product family. The TS27L2BIDT represents a tighter specification grade. Selection should be based on application requirements for input offset accuracy. Applications with stringent DC accuracy requirements benefit from lower input offset voltage specifications.

Q: Are all substitute parts available in the same packaging options as the original TLC27L2ACDG4?

A: The TLC27L2ACDG4 is specified in 8-SOIC packaging. All recommended substitute parts maintain 8-SOIC package compatibility. However, packaging options (Tube, Cut Tape, Tape & Reel) vary by part number and supplier. Verify packaging availability with your component distributor based on procurement volume and assembly requirements.

Q: What is the significance of the "Last Time Buy" status for TLC27L2ACD?

A: Last Time Buy status indicates that the manufacturer has announced end-of-life for this product with a defined final order date. After this date, the part will no longer be available from the manufacturer. Existing inventory may be available through distributors, but long-term supply cannot be guaranteed. For new designs or long-term production requirements, selection of active status parts (TS27L2 or TS272 series) is recommended.

Q: Can the LM432MA/NOPB be used as a substitute despite its obsolete status?

A: The LM432MA/NOPB maintains package and supply voltage compatibility but carries obsolete product status, indicating discontinued manufacturing and no ongoing support. Additionally, its significantly higher supply current (150 µA versus 20 µA) and different input bias current characteristics (3 nA versus 0.6 pA) represent substantial functional differences. This part is not recommended for new designs or production applications.

Q: How do I determine which substitute part is appropriate for my application?

A: Substitution selection depends on three primary factors: (1) Operating temperature requirements—select TS27L2AIDT or TS272AIDT for extended temperature range; (2) Frequency response requirements—select TS272 series for high-speed applications or TS27L2 series for low-frequency applications; (3) Supply current constraints—TS27L2 series offers lower supply current (10 µA) compared to TS272 series (1 mA). Verify that the selected part's electrical specifications remain within acceptable tolerances for your circuit design.

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