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TS27L2ACDT Equivalent & Substitute Parts
Part Overview
The TS27L2ACDT is a CMOS dual-channel operational amplifier manufactured by STMicroelectronics in 8-SOIC surface mount packaging. This linear amplifier IC operates across a 3V to 16V supply range with low input bias current (1 pA) and is designed for general-purpose analog signal conditioning applications. The device is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating.
Substitute parts are necessary when the TS27L2ACDT becomes unavailable due to supply constraints, end-of-life transitions, or when design requirements permit operation with alternative electrical characteristics within acceptable tolerance ranges.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | CMOS | — |
| Number of Circuits | 2 | — |
| Slew Rate | 0.04 | V/µs |
| Gain Bandwidth Product | 100 | kHz |
| Current - Input Bias | 1 | pA |
| Voltage - Input Offset | 900 | µV |
| Current - Supply (x2 Channels) | 10 | 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 TS27L2ACDT is determined by the following critical parameters:
Package Compatibility: All substitute parts must use 8-SOIC (0.154", 3.90mm Width) surface mount packaging to ensure PCB footprint compatibility.
Circuit Configuration: Dual-channel (2 circuits) operational amplifier topology is required for functional equivalence.
Supply Voltage Range: Substitute parts must operate within or encompass the 3V to 16V supply span of the original device. Parts with lower minimum supply voltage (2.7V or 1.4V) are acceptable as they provide broader operational flexibility.
Amplifier Type: CMOS amplifiers are preferred for direct substitution due to matching input bias current characteristics (1 pA). General-purpose amplifiers with comparable input bias current (1 pA) are acceptable alternatives.
Electrical Performance: Slew rate, gain bandwidth product, input offset voltage, and output current must be evaluated against application requirements. Higher performance specifications (faster slew rate, higher bandwidth) are generally acceptable substitutes.
Temperature Range: Operating temperature range of 0°C to 70°C is the baseline. Parts with extended temperature ranges (-40°C to 85°C or -40°C to 125°C) provide enhanced operational flexibility.
Compliance & Status: All substitute parts must maintain RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Product status (Active, Last Time Buy, or Obsolete) affects long-term availability.
Parameter Comparison
| Parameter | TS27L2ACDT | TLV27L2IDR | TLC1078CDR | TLC1078ID | TLC25L2CD |
|---|---|---|---|---|---|
| Manufacturer | STMicroelectronics | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Type | CMOS | General Purpose | CMOS | CMOS | CMOS |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 |
| Slew Rate (V/µs) | 0.04 | 0.06 | 0.032 | 0.032 | 2.9 |
| Gain Bandwidth Product (kHz) | 100 | 160 | 110 | 110 | 110 |
| Current - Input Bias (pA) | 1 | 1 | 1 | 1 | 0.7 |
| Voltage - Input Offset (µV) | 900 | 500 | 180 | 180 | 1100 |
| Current - Supply (µA, x2 Channels) | 10 | 7 | 29 | 29 | 29 |
| Current - Output / Channel (mA) | 45 | 0.4 | 30 | 30 | — |
| Voltage - Supply Span Min (V) | 3 | 2.7 | 1.4 | 3 | 1.4 |
| Voltage - Supply Span Max (V) | 16 | 16 | 16 | 16 | 16 |
| Operating Temperature (°C) | 0 to 70 | -40 to 125 | 0 to 70 | -40 to 85 | 0 to 70 |
| Package / Case | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Product Status | Active | Active | Active | Active | Last Time Buy |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitute: TLV27L2IDR (Texas Instruments)
The TLV27L2IDR is the most direct substitute for the TS27L2ACDT. Both devices share identical 8-SOIC packaging, dual-channel configuration, and 1 pA input bias current. The TLV27L2IDR operates across 2.7V to 16V (encompassing the 3V to 16V range of the original), features improved slew rate (0.06 V/µs versus 0.04 V/µs), and extends operating temperature to -40°C to 125°C. The device is in active production status with full RoHS3 compliance. Output current capability is reduced (0.4 mA per channel versus 45 mA), which requires verification against load requirements.
Secondary Substitute: TLC1078CDR (Texas Instruments)
The TLC1078CDR is a CMOS amplifier in active production with identical package and circuit count. It operates across 1.4V to 16V supply range and maintains 1 pA input bias current. Slew rate is lower (0.032 V/µs), but gain bandwidth product is comparable (110 kHz). Supply current is higher (29 µA versus 10 µA), and output current is reduced (30 mA versus 45 mA). Operating temperature matches the original (0°C to 70°C). RoHS3 compliance is maintained.
Tertiary Substitute: TLC1078ID (Texas Instruments)
The TLC1078ID provides extended operating temperature (-40°C to 85°C) while maintaining CMOS amplifier topology and 1 pA input bias current. Minimum supply voltage is 3V, matching the original specification. Electrical characteristics are identical to TLC1078CDR. Product status is active with full RoHS3 compliance.
Alternative Substitute: TLC25L2CD (Texas Instruments)
The TLC25L2CD is a CMOS amplifier with significantly higher slew rate (2.9 V/µs) and gain bandwidth product (110 kHz). Input bias current is 0.7 pA, and supply current is 29 µA. This device is suitable for applications requiring faster transient response. Product status is Last Time Buy, indicating limited future availability. RoHS3 compliance is maintained.
Obsolete Alternatives Not Recommended for New Designs:
LM432MA/NOPB, SC2904VDR2G, TLC252ACD, and TLC252CD are marked as obsolete or Last Time Buy status and should not be selected for new designs requiring long-term supply assurance.
Frequently Asked Questions (FAQ)
Q: Can the TLV27L2IDR replace the TS27L2ACDT in all applications?
A: The TLV27L2IDR is package and pin-compatible with identical dual-channel configuration. However, output current per channel is significantly reduced (0.4 mA versus 45 mA). Applications requiring high output current must verify load impedance compatibility. Supply voltage range is broader (2.7V minimum), and operating temperature is extended (-40°C to 125°C).
Q: What is the primary difference between CMOS and General Purpose amplifier types?
A: CMOS amplifiers feature extremely low input bias current (1 pA) and are optimized for high-impedance input applications. General Purpose amplifiers (such as TLV27L2IDR) may have comparable input bias current but different internal architecture. Both types are suitable for the TS27L2ACDT application if electrical specifications are within tolerance.
Q: Why do some substitute parts have lower minimum supply voltage?
A: Lower minimum supply voltage (2.7V or 1.4V) indicates the device can operate at lower power levels. This is a superset capability—the device remains functional at the original 3V minimum. Applications requiring 3V operation are unaffected.
Q: Is the 8-SOIC package identical across all listed parts?
A: Yes. All parts use 8-SOIC (0.154", 3.90mm Width) surface mount packaging with identical pinout and PCB footprint. No layout modifications are required for package substitution.
Q: What does "Last Time Buy" product status mean?
A: Last Time Buy indicates the manufacturer has announced end-of-life for the device. Existing inventory may be available, but future production is not guaranteed. Parts with this status should not be selected for new designs requiring long-term supply continuity.
Q: How do slew rate differences affect circuit performance?
A: Slew rate determines the maximum rate of voltage change at the output. Higher slew rates (2.9 V/µs in TLC25L2CD versus 0.04 V/µs in TS27L2ACDT) enable faster transient response but may increase noise in sensitive applications. Lower slew rates are generally acceptable substitutes for applications not requiring high-speed operation.
Q: Are all listed parts RoHS3 compliant?
A: Yes. All substitute parts listed maintain RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the environmental and regulatory status of the TS27L2ACDT.
Q: What is the significance of input offset voltage differences?
A: Input offset voltage is the DC voltage difference between inputs when output is zero. The TS27L2ACDT specifies 900 µV. Substitutes with lower offset voltage (180 µV in TLC1078 series) provide improved DC accuracy. Higher offset voltage (1100 µV in TLC25L2CD) may require additional calibration in precision applications.
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