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TS27M2AID CMOS Amplifier Equivalent & Substitute Parts
Part Overview
The TS27M2AID is a CMOS dual-channel amplifier integrated circuit manufactured by STMicroelectronics in 8-SOIC surface mount packaging. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and production requirements. The TS27M2AID operates across a 3V to 16V supply range with a 1 MHz gain-bandwidth product and 0.6V/µs slew rate, making it suitable for low-power analog signal conditioning applications.
Substiute Parts
Key Parameters
| Parameter | 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 | -40 to 125 | °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 TS27M2AID requires matching the following critical parameters: dual-channel configuration (2 circuits), CMOS amplifier topology, 8-SOIC surface mount package, supply voltage range compatibility (minimum 3V, maximum 16V or higher), and operating temperature range. The gain-bandwidth product of 1 MHz and slew rate of 0.6V/µs establish the baseline performance envelope for functional equivalence.
Substitute parts are grouped into two categories:
Category A: CMOS Rail-to-Rail Amplifiers (ICL7621 Series) These devices maintain CMOS architecture with dual-channel configuration and 8-SOIC packaging. They feature enhanced slew rate (1.6V/µs) and gain-bandwidth product (1.4 MHz), with supply voltage range of 2V to 16V. Input bias current remains at 1 pA, matching the TS27M2AID specification.
Category B: General Purpose Amplifiers (LM2904 Series) These devices provide dual-channel configuration in 8-SOIC packaging with broader supply voltage ranges (3V to 26V or 32V). While classified as general purpose rather than CMOS, they maintain compatible package geometry, channel count, and output current specifications. Operating temperature ranges vary by variant.
Parameter Comparison
| Parameter | TS27M2AID | ICL7621BCSA+ | ICL7621BESA+ | LM2904DR | LM2904DR2G | LM2904M/NOPB |
|---|---|---|---|---|---|---|
| Amplifier Type | CMOS | CMOS | CMOS | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 | 2 |
| Slew Rate (V/µs) | 0.6 | 1.6 | 1.6 | 0.3 | — | — |
| Gain Bandwidth Product (MHz) | 1 | 1.4 | 1.4 | 0.7 | 1 | 1 |
| Current - Input Bias (pA) | 1 | 1 | 1 | 20 | 45 | 45 |
| Voltage - Input Offset (mV) | 0.9 | 5 | 5 | 3 | 2 | 2 |
| Current - Supply (µA) | 150 | 1000 | 1000 | 1000 | 800 | 1000 |
| Current - Output / Channel (mA) | 45 | — | — | 40 | 40 | 40 |
| Voltage - Supply Span Min (V) | 3 | 2 | 2 | 3 | 3 | 3 |
| Voltage - Supply Span Max (V) | 16 | 16 | 16 | 26 | 26 | 32 |
| Operating Temperature (°C) | -40 to 125 | 0 to 70 | -40 to 85 | -40 to 125 | -40 to 85 | -40 to 85 |
| Package / Case | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Product Status | Obsolete | Active | Active | Not For New Designs | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Category A - CMOS Architecture)
The ICL7621BESA+ and ICL7621BCSA+ variants are the closest functional equivalents to the TS27M2AID. Both maintain CMOS amplifier topology with dual-channel configuration, identical 8-SOIC packaging, and 1 pA input bias current. These devices are currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.
The ICL7621BESA+ is recommended for applications requiring extended operating temperature range (-40°C to 85°C), matching the lower bound of the TS27M2AID specification. The ICL7621BCSA+ operates within 0°C to 70°C, suitable for commercial temperature range applications. Both variants feature enhanced performance with 1.6V/µs slew rate and 1.4 MHz gain-bandwidth product compared to the original 0.6V/µs and 1 MHz specifications.
Secondary Substitutes (Category B - General Purpose Amplifiers)
The LM2904 series provides dual-channel amplification in identical 8-SOIC packaging with active production status. The LM2904DR2G and LM2904M/NOPB variants are currently active and offer 1 MHz gain-bandwidth product matching the TS27M2AID. These devices support extended supply voltage ranges (up to 26V or 32V) and maintain 40 mA output current per channel, compared to the TS27M2AID specification of 45 mA.
The LM2904DR2G is available in cut tape and digi-reel packaging with 505,300 units in stock inventory. The LM2904M/NOPB is available in tube packaging with 5,000,200 units in stock. Both support -40°C to 85°C operating temperature range.
Compliance and Availability
All recommended substitutes maintain ROHS3 compliance, EAR99 ECCN classification, and unlimited moisture sensitivity rating (MSL 1), ensuring regulatory and environmental compatibility with the original TS27M2AID specification.
Frequently Asked Questions (FAQ)
Q: Can the ICL7621BESA+ directly replace the TS27M2AID in existing designs?
A: The ICL7621BESA+ is mechanically and electrically compatible within the 8-SOIC package footprint. Both devices feature dual-channel CMOS amplifier configuration with identical pin count and package dimensions (0.154" width, 3.90mm). The ICL7621BESA+ operates within -40°C to 85°C, covering the lower portion of the TS27M2AID temperature range (-40°C to 125°C). Applications requiring operation above 85°C require alternative selection.
Q: What are the performance differences between the TS27M2AID and ICL7621 substitutes?
A: The ICL7621 series provides enhanced slew rate (1.6V/µs versus 0.6V/µs) and higher gain-bandwidth product (1.4 MHz versus 1 MHz). Input bias current remains identical at 1 pA. Supply current increases from 150µA to 1000µA per dual-channel configuration. These performance improvements are generally beneficial for signal conditioning applications, though higher supply current consumption must be considered in battery-powered designs.
Q: Are LM2904 general purpose amplifiers suitable replacements for CMOS-specific applications?
A: The LM2904 series provides functional amplification in identical 8-SOIC packaging with dual-channel configuration and compatible supply voltage ranges. However, LM2904 devices are classified as general purpose amplifiers rather than CMOS architecture. Input bias current is significantly higher (20 to 45 nanoamperes versus 1 picoampere), which may affect precision analog applications requiring ultra-low input bias current. Applications with relaxed input bias current requirements can utilize LM2904 variants.
Q: What packaging options are available for substitute parts?
A: All substitute parts are available in 8-SOIC surface mount package matching the TS27M2AID footprint. Packaging format variations include tube, cut tape with digi-reel, and tape & reel configurations. The ICL7621BCSA+ and ICL7621BESA+ are available in both tube and tape & reel formats. The LM2904 series is available in tube and cut tape formats. Package selection does not affect electrical performance or pin compatibility.
Q: Which substitute part offers the best inventory availability?
A: The LM2904M/NOPB variant has the highest inventory level at 5,000,200 units in stock. The LM2904DR2G provides 505,300 units in stock. The ICL7621BCSA+ offers 2,400 units, and ICL7621BESA+ provides 828 units. Inventory levels should be verified with suppliers for current availability.
Q: Can the TS27M2AID operate at temperatures above 85°C?
A: The TS27M2AID is specified for -40°C to 125°C operating temperature range. The ICL7621BCSA+ operates only to 70°C, while ICL7621BESA+ extends to 85°C. For applications requiring operation above 85°C, the LM2904DR or LM2904DRG3 variants support -40°C to 125°C range, though these are classified as general purpose amplifiers rather than CMOS devices.
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