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Texas Instruments TLC27L1ACP
- Part No.:
- TLC27L1ACP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC27L1ACP.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:458
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Product details
Overview
TLC27L1ACP from Texas Instruments is a low-power, single-channel LinCMOS operational amplifier optimized for single-supply operation in battery-powered and remote sensor systems. It features 10 mV max input offset voltage (25°C), 68 nV/√Hz input noise at 1 kHz, 17 µA typical supply current, and rail-to-rail output swing to negative rail - enabling precision signal conditioning in smoke detectors and field transmitters.
For engineers reviewing the TLC27L1ACP datasheet, TLC27L1ACP pinout, TLC27L1ACP application, or TLC27L1ACP equivalent, key selection criteria include its ultra-low quiescent current, extended common-mode input range below ground, high 10¹² Ω input impedance, and compatibility with 3–16 V supplies across 0°C to 70°C industrial temperature range.
Technical Context
The TLC27L1ACP uses silicon-gate LinCMOS process technology to achieve superior offset-voltage stability versus metal-gate alternatives, with typical 0.1 µV/month drift including first 30 days. Its input stage supports common-mode voltage down to –0.2 V (with VDD = 5 V) and output swings to within 50 mV of negative rail.
It delivers 85 kHz unity-gain bandwidth and 34° phase margin at VDD = 5 V, 25°C, with slew rate of 0.03 V/µs. Internal ESD protection meets MIL-STD-883C, Method 3015.2 (2000 V HBM), and latch-up immunity is designed-in per TI specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | Max 10 mV at 25°C - sets baseline DC error in precision amplification stages |
| Supply Current | 17 µA typical at 25°C - enables multi-year battery life in wireless sensors |
| Input Impedance | 10¹² Ω typical - minimizes loading on high-impedance sources like pH or thermocouple sensors |
| Input Noise | 68 nV/√Hz at 1 kHz - supports low-level analog signal integrity in transducer interfaces |
| Common-Mode Range | Extends to –0.2 V below negative rail - allows direct interfacing with grounded sensors |
| Output Swing | Reaches within 50 mV of negative rail - maximizes dynamic range in single-supply configurations |
| Unity-Gain BW | 85 kHz at VDD = 5 V - sufficient for slow-varying process signals (e.g., pressure, temperature) |
Pinout & Package
Package: PDIP-8 (Plastic Dual In-line Package, 0.300-inch width).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OFFSET N1) | Offset adjustment / NC | Legacy bias-select pin; unconnected on new silicon - leave floating or tie to GND per layout guidance |
| 2 (IN–) | Inverting input | Differential input node; high-impedance CMOS gate - requires guarding in sensitive layouts |
| 3 (IN+) | Noninverting input | Differential input node; same impedance as IN– - used for reference or sensor input |
| 4 (GND) | Ground | Negative power rail reference; must be low-impedance connection to minimize noise coupling |
| 5 (OFFSET N2) | Offset adjustment / NC | Legacy bias-select pin; unconnected on new silicon - no external connection required |
| 6 (OUT) | Amplifier output | Capacitive-load limited; stable with ≤20 pF - avoid long traces without isolation resistor |
| 7 & 8 (VDD) | Positive supply | Single positive rail (3–16 V); pins 7 and 8 internally bonded - both must be connected |
Key Features
| Feature | Design Value |
|---|---|
| Low-power operation | 17 µA supply current enables >10-year battery life in 250 µAh coin cells for intermittent sensing |
| Rail-to-negative-rail output | Drives loads to GND in single-supply systems - eliminates need for negative rail in portable designs |
| Extended common-mode range | Accepts inputs 0.2 V below GND - supports direct connection of grounded thermistors or bridge sensors |
| High input impedance | 10¹² Ω minimizes current draw from microamp-level sensor sources (e.g., gas sensors, photodiodes) |
| ESD-protected inputs | Withstands 2000 V HBM - reduces field failure risk during handling and PCB assembly |
Applications
| Smoke and Heat Detector | Pressure Transmitter |
|---|---|
Use Scenario: Detects ionization current changes or thermistor resistance shifts in residential/commercial fire alarm units. IC Role / Device Role / Timing Role: Precision DC amplifier conditioning low-level sensor output before ADC sampling. Use Value: 10 mV offset and 68 nV/√Hz noise ensure reliable detection thresholds without false alarms. | Use Scenario: Amplifies millivolt-level output from piezoresistive pressure sensors in HVAC or industrial process control. IC Role / Device Role / Timing Role: Signal buffer and gain stage interfacing sensor to 4–20 mA transmitter circuitry. Use Value: 10¹² Ω input impedance prevents sensor loading; rail-to-rail output maximizes DAC resolution utilization. |
| Temperature Transmitter | Motion Detector |
Use Scenario: Converts RTD or thermistor voltage into linearized analog output for PLC analog inputs. IC Role / Device Role / Timing Role: Low-drift instrumentation amplifier front-end with cold-junction compensation support. Use Value: 0.1 µV/month offset drift ensures calibration stability over multi-year field deployment. | Use Scenario: Amplifies weak pyroelectric sensor signals in PIR-based occupancy or security systems. IC Role / Device Role / Timing Role: High-impedance AC-coupled preamplifier with adjustable gain and offset nulling. Use Value: Single-supply operation simplifies power architecture; low 17 µA current extends battery life in wireless nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L2CP | Dual-channel version in same PDIP-8 package; identical specs per channel but higher total IDD (34 µA typ) | Suitable when two matched amplifiers needed (e.g., instrumentation amp + reference buffer) | Select TLC27L2CP only if dual-channel functionality is required - no pin-to-pin compatibility with TLC27L1ACP |
| LPV521MG/NOPB | Lower supply current (320 nA), lower offset (1.25 mV), but narrower supply range (1.6–5.5 V) and no extended CMVR | Better for ultra-low-power sub-µA systems; unsuitable for 12 V sensor interfaces or below-ground inputs | Choose LPV521MG/NOPB for energy-harvesting or coin-cell apps under 5.5 V; retain TLC27L1ACP for 3–16 V industrial sensors |
Compared with TLC27L2CP and LPV521MG/NOPB, the TLC27L1ACP uniquely balances ultra-low power, wide supply range, and true below-rail input capability - making it optimal for legacy 5–12 V industrial sensor nodes where cost and proven reliability are critical.
Availability
TLC27L1ACP is available at Aetrix Electronics and suitable for smoke detector manufacturing, field transmitter production, temperature monitoring systems, and motion-sensing modules requiring stable component supply across long product lifecycles.
Supply support for TLC27L1ACP 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog ICs and industrial-grade components.
The TLC27L1x family was engineered specifically for low-power, high-impedance sensor signal conditioning in industrial and safety-critical environments - emphasizing long-term offset stability, ESD robustness, and single-supply usability.
FAQ
What is the maximum operating temperature range for the TLC27L1ACP?
The TLC27L1ACP 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. For extended temperature operation (–40°C to +85°C), the TLC27L1IP variant is specified - the TLC27L1ACP itself is not rated beyond +70°C.
Does the TLC27L1ACP support true rail-to-rail input?
No, the TLC27L1ACP does not support rail-to-rail input. Its common-mode input voltage range extends to –0.2 V below GND (negative rail) and up to VDD – 1.5 V (e.g., +3.5 V at VDD = 5 V). While the input accepts voltages below ground, it cannot reach the positive supply rail - unlike modern rail-to-rail input op-amps.
Can the OFFSET N1 and OFFSET N2 pins be left unconnected on the TLC27L1ACP?
Yes - on new silicon revisions of the TLC27L1ACP, OFFSET N1 (pin 1) and OFFSET N2 (pin 5) are non-connected (NC) terminals. They may be left floating, though TI recommends tying them to GND for mechanical stability and noise immunity. Do not apply external offset correction networks unless using legacy silicon (not applicable to current production TLC27L1ACP).
What is the typical input bias current of the TLC27L1ACP at 25°C?
The typical input bias current of the TLC27L1ACP is 0.6 pA at 25°C, with a maximum of 60 pA over temperature. This ultra-low value results from its LinCMOS input stage and enables use with high-impedance sources such as photodiodes, pH electrodes, and ceramic humidity sensors without significant signal error.
Is the TLC27L1ACP compatible with capacitive loads?
The TLC27L1ACP is stable with capacitive loads up to 20 pF when driving directly. For larger loads (e.g., cables or ADC input capacitance), TI recommends adding a series isolation resistor (≥100 Ω) between the OUT pin and the load to maintain phase margin above 30° and prevent oscillation - confirmed in Figure 5-29 of the datasheet.
TLC27L1ACP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.05V/µs
- Gain Bandwidth Product:
- 110 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.7 pA
- Voltage - Input Offset:
- 900 µV
- Current - Supply:
- 14µA
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TLC27L1ACP FAQ
1.How can I place an order for TLC27L1ACP through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC27L1ACP 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 TLC27L1ACP reliable?
The price and inventory of TLC27L1ACP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC27L1ACP is usually 5 days.
3.What payment methods are accepted for TLC27L1ACP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC27L1ACP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC27L1ACP?
TLC27L1ACP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC27L1ACP 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 TLC27L1ACP?
For technical support, including TLC27L1ACP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC27L1ACP requirements.
6.How does Aetrix verify that TLC27L1ACP is sourced from the original manufacturer or authorized distributors?
All TLC27L1ACP 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 TLC27L1ACP meets industry standards.
7.What is the process for return or replacement of TLC27L1ACP?
All TLC27L1ACP units undergo pre-shipment inspection (PSI). If there is an issue with TLC27L1ACP, 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 TLC27L1ACP part is unused and in its original packaging.
Return procedure for TLC27L1ACP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC27L1ACP Tags
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LM358DR
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MCP6006UT-E/OT
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LM358P
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