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Texas Instruments TLC27L2ACD
- Part No.:
- TLC27L2ACD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC27L2ACD.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:727
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Product details
Overview
TLC27L2ACD from Texas Instruments is a precision dual CMOS operational amplifier optimized for low-power, single-supply sensor signal conditioning. It delivers 5 mV max input offset voltage at 25°C, ultra-low 34 µA typical supply current (VDD = 5 V), and rail-to-rail output swing down to the negative rail - enabling accurate amplification in battery-powered field transmitters and smoke detectors.
For engineers reviewing the TLC27L2ACD datasheet, TLC27L2ACD pinout, TLC27L2ACD application, or TLC27L2ACD equivalent, key selection criteria include its 0°C to 70°C operating range, SOIC-8 package, LinCMOS™ input stage with 10¹² Ω impedance, and verified performance in low-voltage analog front-ends requiring long-term offset stability and ESD robustness.
Technical Context
The TLC27L2ACD uses Texas Instruments' silicon-gate LinCMOS™ process to achieve high DC precision and low power simultaneously. Its input stage provides 10¹² Ω input impedance and sub-picoampere bias currents, while the output stage supports rail-to-rail swing with 3.2 V high-level output and 1 mV low-level output (VDD = 5 V).
It operates from 3 V to 16 V over 0°C–70°C, supports single-supply operation with common-mode input extending 0.2 V below ground, and incorporates internal ESD protection rated to 2000 V per MIL-STD-883C Method 3015.2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (max) | 5 mV at 25°C - enables direct interfacing with low-output sensors without trimming |
| Supply Current (typ) | 34 µA at VDD = 5 V - supports >10-year battery life in remote sensor nodes |
| Input Impedance | 10¹² Ω - prevents loading of high-impedance sources like piezoelectric or pH electrodes |
| Common-Mode Input Range | −0.2 V to 3.5 V (VDD = 5 V) - allows sensing signals referenced to ground in single-supply systems |
| Output Voltage Swing | 1 mV to 4.1 V (VDD = 5 V) - maximizes dynamic range for ADC input stages |
| Unity-Gain Bandwidth | 85 kHz at 25°C - sufficient for DC–10 kHz sensor signal conditioning and filtering |
| ESD Protection | 2000 V HBM - reduces need for external protection in industrial field environments |
Pinout & Package
Package: SOIC-8 (D suffix), 3.9 mm × 4.9 mm body, 1.27 mm pitch, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN+ | Noninverting input, Channel 1 | High-impedance node for reference or sensor signal connection |
| 1IN– | Inverting input, Channel 1 | Feedback or gain-setting node; accepts resistor networks up to 10 MΩ |
| 1OUT | Output, Channel 1 | Rail-to-rail capable; drives 1 MΩ load with <50 mV headroom to rails |
| GND | Ground / Negative supply | Reference for both inputs and outputs; common return for dual-channel operation |
| 2IN+ | Noninverting input, Channel 2 | Independent high-Z input for second sensor or signal path |
| 2IN– | Inverting input, Channel 2 | Separate feedback node; no crosstalk with Channel 1 |
| 2OUT | Output, Channel 2 | Full rail-to-rail swing; usable as buffer or second-stage amplifier |
| VDD | Positive supply | Accepts 3–16 V; powers both amplifiers; low quiescent draw minimizes thermal drift |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 34 µA supply current enables multi-year operation on coin-cell batteries |
| LinCMOS™ input stage | 10¹² Ω input impedance and <60 pA bias current preserve signal integrity from high-Z sources |
| Rail-to-rail output | Swings within 1 mV of GND and 0.9 V of VDD (5 V) - maximizes ADC utilization |
| Extended common-mode range | Inputs operate 0.2 V below GND - eliminates need for level-shifting in grounded-sensor designs |
| Offset voltage stability | 0.1 µV/month drift ensures calibration longevity in unattended field deployments |
Applications
| Smoke and Heat Detector | Pressure Transmitter |
|---|---|
Use Scenario: Amplifying low-level ionization chamber or thermopile output in residential fire alarms. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with stable offset for analog threshold detection. Use Value: 5 mV max VIO and 0.1 µV/month drift ensure consistent alarm thresholds over 10+ years without recalibration. | Use Scenario: Conditioning bridge output from MEMS pressure sensors in HVAC or industrial process control. IC Role / Device Role / Timing Role: Instrumentation-grade gain stage with high CMRR (>65 dB) and low noise (68 nV/√Hz). Use Value: 10¹² Ω input impedance prevents bridge imbalance; rail-to-rail output fully utilizes 12-bit ADC range. |
| Temperature Transmitter | Motion Detector |
Use Scenario: Linearizing and amplifying RTD or thermistor voltage in 4–20 mA loop transmitters. IC Role / Device Role / Timing Role: Low-drift, low-power signal conditioner operating from loop-supplied 3–16 V. Use Value: Single-supply operation and −0.2 V input range allow direct connection to grounded sensor references. | Use Scenario: Amplifying pyroelectric sensor output in battery-powered PIR motion sensors. IC Role / Device Role / Timing Role: Dual-channel amplifier: one for AC-coupled detection, one for DC-biased reference. Use Value: 34 µA total supply current extends AA battery life beyond 5 years in intermittent-use applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV27L2CD | Lower 25 µA supply current, 2 mV VIO max, same SOIC-8 package | Better suited for ultra-low-power designs where offset tolerance allows 2 mV | Select when lower quiescent current is critical and tighter offset is acceptable |
| LMV358IDR | Higher 80 µA supply current, 7 mV VIO max, rail-to-rail I/O, wider 2.7–5.5 V range | Optimized for 3.3 V systems; less suitable for 5–16 V industrial supplies | Choose for modern 3.3 V embedded systems where higher power budget exists |
Compared with TLV27L2CD and LMV358IDR, the TLC27L2ACD offers superior offset voltage (5 mV vs 2 mV/7 mV) and broader supply range (3–16 V vs 2.7–5.5 V), making it uniquely suitable for legacy and industrial 5–12 V sensor interfaces requiring long-term DC stability.
Availability
TLC27L2ACD is available at Aetrix Electronics and suitable for smoke detector manufacturing, industrial pressure transmitter design, and battery-powered motion sensor development requiring stable component supply across extended product lifecycles.
Supply support for TLC27L2ACD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision op amps and industrial signal chains.
The TLC27Lx family was designed for high-accuracy, low-power sensor signal conditioning in field-deployed instrumentation - emphasizing offset stability, single-supply operation, and robustness in harsh environments.
FAQ
What is the maximum operating temperature range for the TLC27L2ACD?
The TLC27L2ACD is characterized for operation from 0°C to 70°C. This C-suffix grade is intended for commercial and industrial indoor applications where ambient temperatures remain within this range. It is not rated for extended temperature operation like the I-suffix (−40°C to +85°C) or M-suffix (−55°C to +125°C) variants. Always verify thermal derating in PCB layout for sustained 70°C ambient conditions.
Does the TLC27L2ACD support true rail-to-rail input?
The TLC27L2ACD does not support rail-to-rail input; its common-mode input voltage range extends to −0.2 V (0.2 V below GND) and up to 3.5 V when VDD = 5 V. However, it does provide rail-to-rail output swing - delivering as low as 1 mV above GND and as high as 4.1 V below VDD. This asymmetry makes it ideal for single-supply systems with grounded sensors but requires input biasing for full-rail input signals.
What package type is used for the TLC27L2ACD?
The TLC27L2ACD is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package, designated "D" in TI's packaging nomenclature. It measures 3.9 mm × 4.9 mm with 1.27 mm lead pitch and is RoHS-compliant. This surface-mount package supports automated assembly and provides thermal and mechanical reliability for industrial PCBs.
How does the input offset voltage drift of the TLC27L2ACD impact long-term calibration?
The TLC27L2ACD exhibits typically 0.1 µV/month input offset voltage drift, including the first 30 days. Over 10 years, this accumulates to ~12 µV - well below its 5 mV initial specification. This exceptional stability means field-deployed systems (e.g., smoke detectors or transmitters) can maintain accuracy without periodic recalibration, reducing maintenance cost and improving functional safety compliance.
Can the TLC27L2ACD drive capacitive loads directly?
The TLC27L2ACD is not unity-gain stable into heavy capacitive loads. Its phase margin drops to 30° at 70°C with 20 pF load, indicating potential instability above ~100 pF. For driving ADC input capacitors or cables, use a series resistor (≥100 Ω) between output and load, or add a small isolation capacitor (1–10 pF) in the feedback path. Refer to Figure 5-29 in the datasheet for phase margin vs. capacitive load curves.
TLC27L2ACD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.03V/µs
- Gain Bandwidth Product:
- 110 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.6 pA
- Voltage - Input Offset:
- 900 µV
- Current - Supply:
- 20µA (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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLC27L2ACD FAQ
1.How can I place an order for TLC27L2ACD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC27L2ACD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLC27L2ACD reliable?
The price and inventory of TLC27L2ACD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC27L2ACD is usually 5 days.
3.What payment methods are accepted for TLC27L2ACD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC27L2ACD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC27L2ACD?
TLC27L2ACD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC27L2ACD order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLC27L2ACD?
For technical support, including TLC27L2ACD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC27L2ACD requirements.
6.How does Aetrix verify that TLC27L2ACD is sourced from the original manufacturer or authorized distributors?
All TLC27L2ACD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLC27L2ACD meets industry standards.
7.What is the process for return or replacement of TLC27L2ACD?
All TLC27L2ACD units undergo pre-shipment inspection (PSI). If there is an issue with TLC27L2ACD, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLC27L2ACD part is unused and in its original packaging.
Return procedure for TLC27L2ACD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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