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Texas Instruments TLC27L4CN
- Part No.:
- TLC27L4CN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC27L4CN.pdf
- Description:
- IC CMOS 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:235
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Product details
Overview
TLC27L4CN from Texas Instruments is a precision quad operational amplifier in PDIP-14 package, designed for low-power, single-supply sensor signal conditioning. It delivers 10 mV max input offset voltage (25°C), 195 µW typical power consumption at 5 V, and rail-to-rail output swing down to the negative rail - enabling direct interfacing with transducers in battery-powered field transmitters.
For engineers reviewing the TLC27L4CN datasheet, TLC27L4CN pinout, TLC27L4CN application, or TLC27L4CN equivalent, this device is selected for ultra-low bias current (0.6 pA typ), high CMRR (65–87 dB), wide common-mode input range extending below ground (–0.2 V), and stable operation across 0°C to 70°C - critical for smoke detectors, pressure/temperature transmitters, and motion sensing systems.
Technical Context
The TLC27L4CN uses TI's LinCMOS™ silicon-gate process to achieve ultra-high input impedance (10¹² Ω) and sub-picoampere input bias current while avoiding bipolar power penalties. Its four independent amplifiers share a single 5 V supply and support single-ended input signals referenced to ground.
It features internal ESD protection rated to 2000 V (MIL-STD-883C, Method 3015.2), latch-up immunity, and guaranteed operation from 3 V to 16 V supply over 0°C to 70°C - making it suitable for remote industrial sensor nodes where supply headroom and long-term parametric stability are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (max) | 10 mV at 25°C - sets worst-case DC error in precision gain stages without trimming |
| Supply Current (typ) | 68 µA per amplifier (272 µA total) at 5 V - enables multi-year battery life in low-duty-cycle sensor systems |
| Input Bias Current (typ) | 0.6 pA at 25°C - preserves signal integrity when amplifying high-impedance sources like piezoresistive sensors |
| Common-Mode Input Range | –0.2 V to 3.5 V at 5 V supply - allows direct connection of grounded-sensor outputs without level-shifting circuitry |
| Output Voltage Swing | Down to GND (1 mV low-level output) - supports full dynamic range utilization in single-supply data acquisition |
| Unity-Gain Bandwidth | 85 kHz at 5 V - sufficient for DC-coupled analog front-ends in slow-varying physical measurements (e.g., temperature, pressure) |
| CMRR | 65–87 dB - rejects noise coupled onto sensor leads in electrically noisy industrial environments |
Pinout & Package
Package: PDIP-14 (Plastic Dual In-line Package, 14-pin, 0.3-inch width). RoHS-compliant, through-hole mountable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN+ | Noninverting input, Channel 1 | Accepts high-impedance sensor signals; referenced to GND in single-supply configurations |
| 1IN– | Inverting input, Channel 1 | Used for feedback or differential sensing; supports unity-gain buffer or inverting amplifier topologies |
| 1OUT | Output, Channel 1 | Drives loads up to ±30 mA; swings to GND and within 0.9 V of VDD at light load |
| 2IN+, 2IN–, 2OUT | Inputs/Output, Channel 2 | Independent channel for multi-sensor signal paths or cascaded filtering stages |
| 3IN+, 3IN–, 3OUT | Inputs/Output, Channel 3 | Enables three-channel analog processing (e.g., temperature + humidity + pressure) on one IC |
| 4IN+, 4IN–, 4OUT | Inputs/Output, Channel 4 | Supports redundancy, reference buffering, or auxiliary signal conditioning |
| GND | Ground / Negative Supply | Reference node for all inputs and outputs; must be low-impedance to maintain CMRR and noise immunity |
| VDD | Positive Power Supply | Accepts 3–16 V; powers all four op-amps; decoupling capacitor required near pin for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 0.6 pA typical - minimizes voltage drop across high-Z sensor elements (e.g., pH electrodes, thermistors) |
| Rail-to-rail output capability | Swings to GND and within 0.9 V of VDD - maximizes ADC input range in 5 V single-supply systems |
| Single-supply optimized architecture | Common-mode input extends 0.2 V below GND - eliminates need for negative supply in transducer interfaces |
| ESD protection | 2000 V HBM rating - reduces risk of field failure during handling or installation in unshielded enclosures |
| Latch-up immunity | Designed-in robustness against transient-induced parasitic conduction - improves reliability in harsh EMI environments |
Applications
| Smoke Detector Signal Conditioning | Pressure Transmitter Analog Front-End |
|---|---|
|
Use Scenario: Amplifying weak ionization-current signals from smoke chamber electrodes under battery-powered, low-duty-cycle operation. IC Role / Device Role / Timing Role: Quad op-amp provides gain, filtering, and reference buffering for dual-sensor redundancy and self-test circuitry. Use Value: 195 µW total quiescent power extends 10-year battery life; rail-to-rail output ensures full ADC utilization without external level-shifting. |
Use Scenario: Conditioning millivolt-level bridge outputs from strain-gauge pressure sensors in industrial process control loops. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier (using two channels), excitation buffer, and output driver in 4–20 mA transmitter design. Use Value: 10¹² Ω input impedance prevents bridge imbalance; 65–87 dB CMRR suppresses common-mode noise from 480 VAC motor drives nearby. |
| Temperature Transmitter Interface | Motion Detector Signal Chain |
|
Use Scenario: Linearizing and amplifying RTD or thermistor voltage outputs in HVAC thermostats and building automation nodes. IC Role / Device Role / Timing Role: Precision gain stage, cold-junction compensation buffer, and low-pass filter integrator for noise rejection. Use Value: 10 mV max VIO limits temperature measurement error to <±0.5°C over 0–70°C; ultra-low IIB avoids self-heating errors in high-resistance thermistors. |
Use Scenario: Amplifying microvolt-level signals from PIR (passive infrared) sensors in security lighting and occupancy detection systems. IC Role / Device Role / Timing Role: High-gain, low-noise preamplifier followed by active bandpass filtering and comparator interface. Use Value: 70 nV/√Hz input noise floor preserves signal-to-noise ratio; single-supply operation simplifies PCB layout in compact, cost-sensitive modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464CDR | Lower VIO (2 mV max), higher supply current (550 µA total), rail-to-rail I/O, SOIC-14 only | Better DC accuracy but 2× higher power - unsuitable for multi-year battery use; requires PCB redesign for SOIC footprint | Select TLV2464CDR only if VIO budget is ≤2 mV and board space allows SOIC-14; avoid for legacy PDIP layouts. |
| LM324N | Higher VIO (7 mV max), higher IIB (45 nA), no rail-to-rail output, same PDIP-14 package | Compatible pinout and footprint, but 75× higher input bias current degrades high-Z sensor accuracy; limited common-mode range | LM324N is a drop-in replacement for cost-sensitive, non-precision upgrades - not recommended for new designs requiring sub-nA bias or extended input range. |
Compared with TLC27L4CN, TLV2464CDR offers superior offset and bandwidth but sacrifices battery life and package compatibility, while LM324N retains mechanical fit at the cost of precision and input-stage performance - making TLC27L4CN the optimal balance for low-power, high-impedance sensor interfaces in legacy through-hole systems.
Availability
TLC27L4CN is available at Aetrix Electronics and suitable for smoke detectors, industrial pressure transmitters, and battery-powered motion sensors requiring stable component supply across extended product lifecycles.
Supply support for TLC27L4CN 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 heritage in precision op-amp innovation.
The TLC27Lx family was engineered for ultra-low-power, high-input-impedance analog signal conditioning in remote and inaccessible sensor applications - targeting industrial field transmitters, safety-critical environmental monitors, and long-life battery-operated instrumentation.
FAQ
What is the maximum operating supply voltage for the TLC27L4CN?
The TLC27L4CN supports a maximum supply voltage of 16 V across its specified 0°C to 70°C operating range. Absolute maximum rating is 18 V, but sustained operation above 16 V may compromise long-term reliability and is outside guaranteed specifications. Always observe derating curves in Section 5.2 for thermal management at elevated voltages and ambient temperatures.
Does the TLC27L4CN support true rail-to-rail input operation?
No - the TLC27L4CN does not support rail-to-rail input. Its common-mode input voltage range extends to –0.2 V (below GND) and up to 3.5 V (at VDD = 5 V), meaning it accepts inputs slightly below ground but cannot reach the positive rail. However, its output is rail-to-rail down to GND and within 0.9 V of VDD, making it ideal for single-supply systems where input signals are referenced near ground.
Can the TLC27L4CN drive capacitive loads directly?
The TLC27L4CN is not unity-gain stable into heavy capacitive loads. Data sheet Figure 5-29 shows phase margin degrades below 30° with >100 pF load; oscillation may occur. For driving cables or ADC input capacitance (>50 pF), add a series resistor (100–470 Ω) between output and load, or use a dedicated buffer stage. Stability testing under actual load conditions is recommended.
Is the TLC27L4CN pin-compatible with other TLC27Lx variants?
Yes - all TLC27Lx quad op-amps (including TLC27L4A, TLC27L4B, TLC27L9, and their C/I-suffix versions) share identical PDIP-14, SOIC-14, SOP-14, and TSSOP-14 pinouts. The TLC27L4CN can be replaced with TLC27L4ACN or TLC27L4BCN without layout changes, though offset voltage grade and temperature range differ - verify VIO and operating ambient requirements before substitution.
How does the input offset voltage drift affect long-term calibration in field-deployed devices?
The TLC27L4CN exhibits typical input offset voltage drift of 0.1 µV/month (including first 30 days), per datasheet Section 1. This translates to <±1.2 µV/year drift - negligible for most industrial sensor applications where system-level calibration accounts for ≥1 mV offsets. For metrology-grade systems, periodic recalibration remains advisable, but the drift is orders of magnitude lower than standard bipolar op-amps.
TLC27L4CN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.05V/µs
- Gain Bandwidth Product:
- 110 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.7 pA
- Voltage - Input Offset:
- 1.1 mV
- Current - Supply:
- 57µA (x4 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
TLC27L4CN FAQ
1.How can I place an order for TLC27L4CN through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC27L4CN 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 TLC27L4CN reliable?
The price and inventory of TLC27L4CN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC27L4CN is usually 5 days.
3.What payment methods are accepted for TLC27L4CN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC27L4CN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC27L4CN?
TLC27L4CN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC27L4CN 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 TLC27L4CN?
For technical support, including TLC27L4CN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC27L4CN requirements.
6.How does Aetrix verify that TLC27L4CN is sourced from the original manufacturer or authorized distributors?
All TLC27L4CN 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 TLC27L4CN meets industry standards.
7.What is the process for return or replacement of TLC27L4CN?
All TLC27L4CN units undergo pre-shipment inspection (PSI). If there is an issue with TLC27L4CN, 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 TLC27L4CN part is unused and in its original packaging.
Return procedure for TLC27L4CN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC27L4CN Tags
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LM358DT
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