TS27M2ACD Equivalent & Substitute Parts

Part Overview

The TS27M2ACD is a CMOS dual-channel operational amplifier manufactured by STMicroelectronics in 8-SOIC surface mount packaging. This device is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing design support and production continuity. The TS27M2ACD serves applications requiring low input bias current, low input offset voltage, and operation across a 3V to 16V supply range. Substitute parts must maintain compatibility with the 8-SOIC package footprint and deliver equivalent electrical performance within the specified parameter ranges.

Key Parameters

Parameter	TS27M2ACD Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Slew Rate	0.6	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	1	pA
Voltage - Input Offset	900	µV
Current - Supply (x2 Channels)	150	µA
Current - Output / Channel	45	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	—

Substitute Part Grouping Explanation

Substitution of the TS27M2ACD is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitution:

Primary Substitution Criteria:

Amplifier Type: CMOS (maintains input bias current and offset voltage characteristics)
Number of Circuits: 2 (dual-channel configuration)
Package / Case: 8-SOIC (0.154", 3.90mm Width) (ensures PCB footprint compatibility)
Mounting Type: Surface Mount (maintains assembly process compatibility)

Secondary Electrical Compatibility Parameters:

Slew Rate: Equal to or greater than 0.6 V/µs (maintains signal fidelity)
Gain Bandwidth Product: Equal to or greater than 1 MHz (maintains frequency response)
Current - Input Bias: Equal to or less than 1 pA (maintains low-bias characteristics)
Voltage - Input Offset: Equal to or less than 900 µV (maintains precision)
Current - Supply (x2 Channels): Equal to or less than 150 µA (maintains power efficiency)
Current - Output / Channel: Equal to or greater than 45 mA (maintains output drive capability)
Voltage - Supply Span: Minimum 3V to Maximum 16V (maintains supply compatibility)
Operating Temperature: Minimum 0°C to Maximum 70°C (maintains thermal operating range)

Substitute parts are grouped into two categories: CMOS amplifiers with matched performance characteristics, and general-purpose amplifiers with broader operating ranges that accommodate the TS27M2ACD application envelope.

Parameter Comparison

Parameter	TS27M2ACD	TLC1078CD	TLC1078CDR	TLC1078ID	TLC1078IDR	TLC252ACD	LM2904DR	LM2904DRG3	LM2904DRG4	LM2904QDR	LPC662IM/NOPB
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	General Purpose	General Purpose	General Purpose	General Purpose	CMOS
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Slew Rate (V/µs)	0.6	0.032	0.032	0.032	0.032	2.9	0.3	0.3	0.3	0.3	0.11
Gain Bandwidth Product (MHz)	1	0.11	0.11	0.11	0.11	2.2	0.7	0.7	0.7	0.7	0.35
Current - Input Bias (pA)	1	1	1	1	1	1	20000	20000	20000	20000	0.002
Voltage - Input Offset (µV)	900	180	180	180	180	900	3000	3000	3000	3000	1000
Current - Supply x2 Channels (µA)	150	29	29	29	29	1900	1000	500	500	500	86
Current - Output / Channel (mA)	45	30	30	30	30	—	40	40	40	40	40
Voltage - Supply Span Min (V)	3	1.4	1.4	3	3	1.4	3	3	3	3	4.75
Voltage - Supply Span Max (V)	16	16	16	16	16	16	26	26	26	26	15.5
Operating Temperature (°C)	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	0 to 70	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 85
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct CMOS Substitutes (Preferred):

TLC252ACD and TLC1078 series devices (TLC1078CD, TLC1078CDR, TLC1078ID, TLC1078IDR) are CMOS amplifiers manufactured by Texas Instruments. These devices maintain the CMOS amplifier type classification and dual-channel configuration of the TS27M2ACD. TLC252ACD delivers higher slew rate (2.9 V/µs) and gain bandwidth product (2.2 MHz), exceeding TS27M2ACD performance. TLC1078 variants deliver lower slew rate (0.032 V/µs) and gain bandwidth product (0.11 MHz), suitable for applications where the TS27M2ACD performance envelope exceeds requirements. All TLC devices are ROHS3 compliant and available in 8-SOIC packaging.

TLC1078CDR and TLC1078IDR are currently active products. TLC1078CD is last-time-buy status. TLC252ACD is last-time-buy status. These devices accommodate the TS27M2ACD supply voltage range (3V to 16V minimum) and maintain low input bias current (1 pA) and input offset voltage (180 µV to 900 µV).

Tier 2 - General Purpose Amplifier Substitutes (Extended Operating Range):

LM2904 series devices (LM2904DR, LM2904DRG3, LM2904DRG4, LM2904QDR) are general-purpose amplifiers manufactured by Texas Instruments. These devices deliver extended operating temperature range (-40°C to 125°C) and extended supply voltage maximum (26V). LM2904QDR is currently active. LM2904DRG3 is last-time-buy status. LM2904DRG4 is obsolete. LM2904DR is not-for-new-designs status.

LM2904 devices deliver lower slew rate (0.3 V/µs) and gain bandwidth product (0.7 MHz) compared to TS27M2ACD. Input bias current is significantly higher (20 nA versus 1 pA). These devices are suitable for applications where the TS27M2ACD performance specifications exceed functional requirements and extended temperature operation is beneficial.

Tier 3 - CMOS Rail-to-Rail Substitute (Specialized Applications):

LPC662IM/NOPB is a CMOS amplifier with push-pull, rail-to-rail output configuration. This device is last-time-buy status. Supply voltage range is 4.75V to 15.5V, which overlaps the TS27M2ACD range (3V to 16V) with reduced minimum voltage. Input bias current is extremely low (0.002 pA). This device is suitable for applications requiring rail-to-rail output swing and ultra-low input bias current.

Compliance and Certification:

All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the TS27M2ACD compliance profile. All devices are classified under ECCN EAR99 and HTSUS 8542.33.0001, consistent with the main part classification.

Frequently Asked Questions (FAQ)

Q: Can TLC1078 series devices directly replace TS27M2ACD in all applications?

A: TLC1078 devices are pin-compatible in 8-SOIC packaging and maintain CMOS amplifier type classification. However, TLC1078 devices deliver significantly lower slew rate (0.032 V/µs versus 0.6 V/µs) and gain bandwidth product (0.11 MHz versus 1 MHz). Substitution is valid only for applications where these lower performance parameters are acceptable. Applications requiring the full 0.6 V/µs slew rate or 1 MHz bandwidth should use TLC252ACD instead.

Q: What is the primary difference between CMOS and general-purpose amplifier substitutes?

A: CMOS amplifiers (TS27M2ACD, TLC252ACD, TLC1078, LPC662IM/NOPB) deliver extremely low input bias current (1 pA or less) and are optimized for high-impedance input applications. General-purpose amplifiers (LM2904 series) deliver higher input bias current (20 nA) but offer extended operating temperature range and broader supply voltage compatibility. Selection depends on application input impedance requirements and thermal operating envelope.

Q: Is LM2904QDR suitable as a long-term replacement for obsolete TS27M2ACD?

A: LM2904QDR is currently active and available in high volume. This device is suitable for applications where input bias current of 20 nA is acceptable and extended operating temperature (-40°C to 125°C) is beneficial. However, slew rate (0.3 V/µs) and gain bandwidth product (0.7 MHz) are lower than TS27M2ACD. For applications requiring TS27M2ACD performance specifications, TLC252ACD is the preferred active substitute.

Q: Are all substitute parts available in 8-SOIC packaging?

A: All substitute parts listed are available in 8-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring PCB footprint compatibility with TS27M2ACD designs. Packaging variants (tube, tape & reel, cut tape) differ by part number suffix but do not affect electrical performance or pinout.

Q: What is the significance of product status (active, last-time-buy, obsolete)?

A: Product status indicates manufacturing availability and support timeline. Active products (TLC1078ID, TLC1078IDR, LM2904QDR) are currently manufactured and available for new designs. Last-time-buy products (TLC1078CD, TLC252ACD, LM2904DRG3, LPC662IM/NOPB) have limited remaining inventory and defined end-of-life dates. Obsolete products (TS27M2ACD, LM2904DRG4) are no longer manufactured. For new designs, active products are preferred.

Q: Can TLC252ACD be used in applications originally designed for TS27M2ACD?

A: TLC252ACD is a direct CMOS substitute with identical input bias current (1 pA) and input offset voltage (900 µV). TLC252ACD delivers higher slew rate (2.9 V/µs) and gain bandwidth product (2.2 MHz), exceeding TS27M2ACD performance. Supply current is higher (1.9 mA x2 channels versus 150 µA x2 channels). Substitution is valid for applications where increased power consumption is acceptable and higher performance is beneficial or neutral.

Q: What is the minimum supply voltage requirement for each substitute?

A: TS27M2ACD minimum supply voltage is 3V. TLC1078CD and TLC1078CDR support 1.4V minimum. TLC1078ID and TLC1078IDR support 3V minimum. TLC252ACD supports 1.4V minimum. LM2904 series supports 3V minimum. LPC662IM/NOPB supports 4.75V minimum. Applications operating below 3V require TLC1078CD, TLC1078CDR, or TLC252ACD.

Q: Are there any output drive capability differences between substitutes?

A: TS27M2ACD delivers 45 mA output current per channel. TLC1078 series delivers 30 mA per channel. LM2904 series delivers 40 mA per channel. LPC662IM/NOPB delivers 40 mA per channel. Applications requiring full 45 mA output drive should verify substitute output current capability or implement external buffering.

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