TLC27L7CDR CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TLC27L7CDR is a LinCMOS™ 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 classified as Active product status and is designed for low-power, low-speed analog signal processing applications requiring minimal input bias current and low supply current consumption.

The TLC27L7CDR operates across a wide supply voltage range of 3V to 16V with an operating temperature range of 0°C to 70°C. With a gain bandwidth product of 110 kHz and slew rate of 0.03V/µs, this amplifier is optimized for precision, low-frequency applications where power consumption is critical. The device is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when the original TLC27L7CDR becomes unavailable, when alternative packaging or temperature range requirements emerge, or when design specifications allow for performance trade-offs in gain bandwidth, slew rate, or supply current characteristics.

Key Parameters

Parameter	Value	Unit
Manufacturer	Texas Instruments	—
Part Number	TLC27L7CDR	—
Category	Linear, Amplifiers	—
Amplifier Type	CMOS	—
Number of Circuits	2	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Slew Rate	0.03	V/µs
Gain Bandwidth Product	110	kHz
Current - Input Bias	0.6	pA
Voltage - Input Offset	1.1	mV
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 to 70	°C
Product Status	Active	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TLC27L7CDR is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure direct PCB footprint compatibility without layout redesign.

Amplifier Type & Circuit Count: The TLC27L7CDR is a CMOS dual-channel amplifier. Direct substitutes must maintain CMOS architecture with 2 circuits to preserve functional equivalence. Parts with different amplifier types (General Purpose, Current Feedback) or different circuit counts represent functional alternatives rather than direct substitutes.

Supply Voltage Range: The device operates from 3V to 16V. Substitute parts must support this full range or a compatible subset. Parts with narrower supply ranges (such as 6V to 12V) are restricted to applications within their specified limits.

Electrical Performance Parameters: Key differentiators include slew rate, gain bandwidth product, input bias current, input offset voltage, and supply current. Parts with significantly higher gain bandwidth products (3.5 MHz or greater) or higher slew rates (5.5V/µs or greater) represent performance upgrades suitable for higher-frequency applications. Parts with lower supply current consumption represent power-optimized alternatives.

Temperature Range: The TLC27L7CDR operates from 0°C to 70°C. Substitute parts with extended temperature ranges (-40°C to 125°C) provide broader operational capability and are suitable for industrial or automotive environments.

Compliance & Status: All substitute parts must maintain ROHS3 compliance and unlimited MSL rating (MSL 1) to ensure manufacturing compatibility and reliability.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Package	Slew Rate (V/µs)	GBW (kHz)	Input Bias (pA)	Input Offset (mV)	Supply Current (µA)	Output Current (mA)	Temp Range (°C)	Status
TLC27L7CDR	Texas Instruments	CMOS	2	8-SOIC	0.03	110	0.6	1.1	20	30	0 to 70	Active
TS27L2ACDT	STMicroelectronics	CMOS	2	8-SOIC	0.04	100	1	0.9	10	45	0 to 70	Active
TS272ACDT	STMicroelectronics	CMOS	2	8-SOIC	5.5	3500	1	0.9	1	45	0 to 70	Active
TS272AIDT	STMicroelectronics	CMOS	2	8-SOIC	5.5	3500	1	0.9	1	-40 to 125	Active
TS272BIDT	STMicroelectronics	CMOS	2	8-SOIC	5.5	3500	1	0.25	1	-40 to 125	Active
TS272CDT	STMicroelectronics	CMOS	2	8-SOIC	5.5	3500	1	1.1	1	0 to 70	Active
TS272IDT	STMicroelectronics	CMOS	2	8-SOIC	5.5	3500	1	1.1	1	-40 to 125	Active
LM432MA/NOPB	Texas Instruments	General Purpose	2	8-SOIC	—	1000	3	0.6	150	30	-40 to 85	Obsolete
ADA4311-1ARHZ	Analog Devices Inc.	Current Feedback	2	10-MSOP-EP	1050	310000	2	1	11.8	—	-40 to 85	Active
ADA4311-1ARHZ-R7	Analog Devices Inc.	Current Feedback	2	10-MSOP-EP	1050	310000	2	1	11.8	—	-40 to 85	Active
ADA4312-1ACPZ-R7	Analog Devices Inc.	Current Feedback	1	16-LFCSP	2100	195000	175	1.2	46	225	-40 to 85	Active

Engineering Selection Recommendations

Direct Package-Compatible Substitutes (8-SOIC CMOS Dual-Channel):

The TS27L2ACDT from STMicroelectronics represents the closest functional equivalent to the TLC27L7CDR. Both devices maintain identical package geometry (8-SOIC), CMOS architecture, dual-channel configuration, and operating temperature range (0°C to 70°C). The TS27L2ACDT exhibits marginally lower supply current (10µA versus 20µA) and slightly higher slew rate (0.04V/µs versus 0.03V/µs), making it suitable for direct substitution in power-sensitive applications. Input bias current and offset voltage specifications are comparable.

The TS272 series from STMicroelectronics (TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, TS272IDT) provides package-compatible alternatives with significantly enhanced performance characteristics. These devices feature 32× higher gain bandwidth product (3.5 MHz versus 110 kHz) and 183× higher slew rate (5.5V/µs versus 0.03V/µs), with dramatically reduced supply current consumption (1µA versus 20µA). The TS272 series is suitable for applications requiring higher-frequency response or extended battery life. Temperature range variants include industrial-grade options (-40°C to 125°C) for demanding environments.

Functional Alternatives (Different Package or Architecture):

The LM432MA/NOPB from Texas Instruments is classified as Obsolete product status and therefore not recommended for new designs. Although it maintains 8-SOIC package compatibility and dual-channel configuration, its General Purpose amplifier architecture and significantly higher supply current (150µA) make it unsuitable as a primary substitute.

The ADA4311-1ARHZ and ADA4311-1ARHZ-R7 from Analog Devices represent high-performance Current Feedback amplifier alternatives with 10-MSOP-EP package configuration. These devices require PCB layout redesign due to different package geometry. With 310 MHz bandwidth and 1050V/µs slew rate, they are suitable only for applications requiring substantially higher frequency response than the TLC27L7CDR specification. Supply voltage range is restricted to 6V to 12V, limiting applicability in systems requiring 3V operation.

The ADA4312-1ACPZ-R7 from Analog Devices is a single-channel Current Feedback amplifier in 16-LFCSP package. This device is incompatible with TLC27L7CDR applications requiring dual-channel operation and identical package footprint.

Compliance & Availability:

All recommended CMOS substitutes (TS27L2ACDT and TS272 series) maintain ROHS3 compliance and unlimited MSL rating (MSL 1), ensuring manufacturing compatibility with standard PCB assembly processes. All substitute parts listed are Active product status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the TS272 series directly replace the TLC27L7CDR without circuit modification?

A: Yes, the TS272 series maintains identical 8-SOIC package geometry and dual-channel CMOS configuration, enabling direct PCB footprint compatibility. However, the significantly higher gain bandwidth product (3.5 MHz versus 110 kHz) and slew rate (5.5V/µs versus 0.03V/µs) may alter circuit frequency response characteristics. Circuit simulation or bench testing is recommended to verify performance in bandwidth-critical applications.

Q: What is the key difference between the TLC27L7CDR and TS27L2ACDT?

A: Both devices are low-power CMOS dual-channel amplifiers in 8-SOIC packages with identical operating temperature ranges (0°C to 70°C). The TS27L2ACDT consumes 50% less supply current (10µA versus 20µA) and exhibits marginally higher slew rate (0.04V/µs versus 0.03V/µs). Input bias current and offset voltage specifications are comparable. The TS27L2ACDT is suitable for power-optimized applications.

Q: Why are the ADA4311 and ADA4312 devices listed as alternatives if they use different packages?

A: The ADA4311 and ADA4312 series are included as functional alternatives for applications where performance requirements exceed the TLC27L7CDR specification. These Current Feedback amplifiers provide 310 MHz bandwidth and 1050V/µs slew rate, suitable for high-frequency signal processing. However, their 10-MSOP-EP and 16-LFCSP packages require PCB layout redesign and are not direct substitutes.

Q: Can I use the TS272AIDT in a 0°C to 70°C application?

A: The TS272AIDT is rated for -40°C to 125°C operation, which encompasses the 0°C to 70°C range. It is suitable for this application. The extended temperature rating provides additional operational margin and is compatible with standard industrial temperature requirements.

Q: What is the significance of the TS272BIDT's lower input offset voltage (0.25 mV versus 1.1 mV)?

A: The TS272BIDT features tighter input offset voltage specification (0.25 mV versus 1.1 mV), making it suitable for precision analog applications requiring minimal DC error. This specification difference does not affect package compatibility or general substitutability but may improve performance in precision instrumentation circuits.

Q: Is the LM432MA/NOPB recommended for new designs?

A: No. The LM432MA/NOPB is classified as Obsolete product status. Texas Instruments no longer actively supports this device. New designs should utilize Active-status alternatives such as the TS272 series or TS27L2ACDT to ensure long-term supply chain availability and manufacturer support.

Q: What packaging options are available for TLC27L7CDR substitutes?

A: The primary 8-SOIC package-compatible substitutes (TS27L2ACDT and TS272 series) are available in both Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging formats. Selection depends on production volume and assembly process requirements. High-volume production typically utilizes Tape & Reel packaging, while lower volumes may use Cut Tape format.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance and unlimited MSL rating (MSL 1), ensuring compatibility with standard PCB assembly processes and environmental regulations.

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