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Texas Instruments TLC254BCD
- Part No.:
- TLC254BCD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC254BCD.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,196
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Product details
Overview
TLC254BCD from Texas Instruments is a LinCMOS™ quad operational amplifier optimized for low-power, single-supply operation with 2-mV maximum input offset voltage (VIO), 1.4-V to 16-V supply range, and rail-to-rail common-mode input extending to the negative rail. It delivers 4000 µA typical supply current per amplifier at VDD = 5 V and supports battery-powered sensor signal conditioning, portable instrumentation, and low-voltage analog front-ends.
For engineers reviewing the TLC254BCD datasheet, TLC254BCD pinout, TLC254BCD application, or TLC254BCD equivalent, this device is selected for precision analog signal amplification where ultra-low input bias current (1 pA typ), stable VIO over temperature (2 µV/°C typ), and true single-supply capability down to 1.4 V are critical design requirements.
Technical Context
The TLC254BCD implements a silicon-gate LinCMOS™ process enabling high input impedance (>1012 Ω), sub-picoampere input bias and offset currents, and stable DC performance across 0°C to 70°C. Its internal ESD protection meets MIL-STD-883C Method 3015.1 (2000 V).
It operates stably at unity gain with phase margin ≥40° (VDD = 5 V, RL = 10 kΩ, CL = 20 pF) and features low-noise operation (25 nV/√Hz typ at f = 1 kHz) in its high-bias variant configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIO (max) | 2 mV at TA = 25°C - enables precision DC-coupled amplification without trimming in low-gain sensor interfaces |
| Supply Range | 1.4 V to 16 V - supports direct operation from single alkaline, lithium, or solar cells without regulation |
| Input Bias Current | 1 pA typ - preserves signal integrity in high-impedance transducer circuits (e.g., pH electrodes, piezoelectric sensors) |
| Common-Mode Range | Includes negative rail (VDD–/GND) - allows ground-referenced input signals in single-supply systems |
| Slew Rate | 2.9 V/µs typ at VDD = 5 V - sufficient for <100-kHz small-signal amplification in portable data loggers |
| Unity-Gain BW | 1.7 MHz typ at VDD = 5 V - supports active filtering and buffered signal distribution up to audio band |
| ESD Rating | 2000 V HBM - reduces risk of field failure during manual handling or board assembly |
Pinout & Package
Package: 14-pin Small Outline (SOIC) D package, surface-mount, tape-and-reel compatible (TLC254BCDR available).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Amplifier 1 output | Drives external load or next stage; rail-to-rail swing limited by supply and load |
| 1IN– | Amplifier 1 inverting input | Accepts feedback network; high-Z node sensitive to layout-induced leakage |
| 1IN+ | Amplifier 1 non-inverting input | High-impedance signal input; requires guard ring in ultra-low-current designs |
| VDD | Positive supply | Single or dual supply rail; decoupling capacitor required within 1 cm |
| 2IN+ | Amplifier 2 non-inverting input | Independent input for second channel; shares no internal nodes with Channel 1 |
| 2IN– | Amplifier 2 inverting input | Configurable for inverting gain or differential input with matched resistors |
| 2OUT | Amplifier 2 output | Electrically isolated output; crosstalk < –80 dB at 1 kHz between channels |
| 4OUT | Amplifier 4 output | Final channel output; identical AC/DC specs to Channels 1–3 |
| 4IN– | Amplifier 4 inverting input | Supports multi-stage filtering or summing configurations with low VIO drift |
| 4IN+ | Amplifier 4 non-inverting input | Enables independent reference biasing per channel in multi-sensor systems |
| VDD–/GND | Negative supply / ground | Return path for all four amplifiers; must be low-impedance and star-connected |
| 3IN+ | Amplifier 3 non-inverting input | Third channel input; validated for simultaneous use with full spec compliance |
| 3OUT | Amplifier 3 output | Third channel output; no derating required when all four channels operate concurrently |
Key Features
| Feature | Design Value |
|---|---|
| True single-supply operation | Operates from 1.4 V with input common-mode range including GND - eliminates need for split supplies in portable devices |
| 2-mV VIO grade | Guaranteed max 3 mV over 0°C to 70°C - reduces calibration overhead in medical sensor front-ends |
| 1 pA input bias current | Enables >100-MΩ source impedances without significant DC error - critical for electrochemical and capacitive sensing |
| Stable unity-gain configuration | No external compensation required - simplifies PCB layout and reduces BOM count in space-constrained designs |
| LinCMOS™ process technology | Delivers low 1/f noise and long-term VIO stability (<0.1 µV/month drift after first month) - improves system longevity |
Applications
| Portable Gas Sensor Interface | Low-Power Data Logger Front-End |
|---|---|
Use Scenario: Amplifying microamp-level current from electrochemical gas sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with rail-to-rail input and low VIO to preserve weak signal fidelity. Use Value: 2-mV VIO and 1-pA bias current minimize baseline offset and leakage-induced drift over 10-year deployment. | Use Scenario: Signal conditioning for thermistor, RTD, and humidity sensors in remote environmental monitoring nodes. IC Role / Device Role / Timing Role: Quad-channel buffer and programmable-gain amplifier driving 12-bit SAR ADC inputs. Use Value: Four independent amplifiers reduce component count; 1.4-V operation extends battery life beyond 5 years. |
| Medical Pulse Oximeter Analog Path | Industrial Battery Management Monitor |
Use Scenario: Amplifying low-amplitude photodiode signals in wearable pulse oximeters with strict power budgets. IC Role / Device Role / Timing Role: Low-noise (25 nV/√Hz), low-drift amplifier for AC-coupled red/IR channel separation. Use Value: 25 nV/√Hz noise floor and 2 µV/°C VIO drift ensure SpO₂ accuracy remains within ±1% across body temperature range. | Use Scenario: Monitoring cell voltage, temperature, and current in 4-cell Li-ion packs for power tools and e-bikes. IC Role / Device Role / Timing Role: Quad op-amp performing differential sensing, reference buffering, and comparator hysteresis generation. Use Value: Single SOIC package replaces four discrete amplifiers; 16-V absolute max rating supports transient overvoltage tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC254ACD | 5-mV max VIO (vs. 2 mV); otherwise identical pinout, bias, and noise specs | Higher VIO increases DC error in precision sensor bridges requiring <100-µV offset | Select when cost sensitivity outweighs sub-mV offset requirement and calibration is feasible |
| TLV2464CD | Rail-to-rail output (vs. TLC254BCD's rail-to-rail input only); 600-µA supply current per amp (vs. 4 mA) | Lower power but higher VIO (3.5 mV max); unsuitable for high-precision DC-coupled paths | Prefer for battery-life-critical apps where output swing >95% rail is mandatory and VIO <2 mV is not required |
Compared with TLC254ACD and TLV2464CD, the TLC254BCD uniquely balances ultra-low VIO (2 mV), ultra-low input bias (1 pA), and robust 4-mA drive capability - making it irreplaceable in uncalibrated, high-impedance, single-supply precision analog stages.
Availability
TLC254BCD is available at Aetrix Electronics and suitable for portable medical devices, battery-powered environmental sensors, industrial battery monitors, and low-voltage instrumentation requiring stable component supply across extended production lifecycles.
Supply support for TLC254BCD 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-amps and low-power signal chain solutions.
The TLC254 family was designed for cost-sensitive, energy-constrained applications demanding high DC accuracy and rail-to-rail input operation - particularly in battery-powered instrumentation and sensor interfaces.
FAQ
What is the guaranteed maximum input offset voltage for TLC254BCD over temperature?
The TLC254BCD guarantees a maximum input offset voltage of 3 mV across the full operating temperature range of 0°C to 70°C. At 25°C, the limit is tighter at 2 mV. This specification is verified per the SLOS003G datasheet and applies to all four amplifiers in the IC under recommended operating conditions (VDD = 1.4 V to 16 V, no load). The TLC254BCD achieves this via factory selection and LinCMOS™ process control.
Does TLC254BCD support true single-supply operation with input signals at ground potential?
Yes, the TLC254BCD supports true single-supply operation with its common-mode input voltage range extending to the negative rail (VDD–/GND). At VDD = 5 V, the specified common-mode range is –0.2 V to 4 V, meaning inputs can be at 0 V (ground) without phase reversal or increased distortion. This capability is intrinsic to the LinCMOS™ input stage and is confirmed in the "Recommended Operating Conditions" table of the TLC254BCD datasheet.
What is the typical supply current for TLC254BCD at 1.4 V supply voltage?
At VDD = 1.4 V and TA = 25°C, the TLC254BCD draws 750 µA typical supply current for all four amplifiers combined (187.5 µA per amplifier). This value is specified in the "Electrical Characteristics" table under VDD = 1.4 V test conditions and reflects the device's high-bias architecture optimized for speed and drive strength while maintaining ultra-low-voltage operability - a key differentiator versus low-bias variants like TLC25L4BCD.
Can TLC254BCD drive a 10-kΩ load while maintaining rail-to-rail output swing?
Yes, the TLC254BCD delivers rail-to-rail output swing into a 10-kΩ load. At VDD = 5 V and TA = 25°C, VOH is specified as 3.2 V min and VOL as 50 mV max - corresponding to >90% of the rail-to-rail span. This performance is validated with RL = 10 kΩ and is consistent across all four channels. Output swing degrades only under heavier loads (e.g., <2 kΩ) or elevated temperatures, per the "Operating Characteristics" section of the TLC254BCD datasheet.
Is TLC254BCD pin-compatible with other members of the TLC254 family such as TLC254CD or TLC254ACD?
Yes, the TLC254BCD is fully pin-compatible with TLC254CD, TLC254ACD, TLC25L4BCD, and TLC25M4BCD in the 14-pin SOIC (D) package. All share identical pinout, footprint, and thermal characteristics. The only functional differences are in guaranteed VIO grade (2 mV for TLC254BCD vs. 10 mV for TLC254CD), supply current, slew rate, and bandwidth - which stem from internal biasing and are transparent to PCB layout. No redesign is needed when upgrading from TLC254CD to TLC254BCD.
TLC254BCD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Open Drain
- Slew Rate:
- 4.5V/µs
- Gain Bandwidth Product:
- 2.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 340 µV
- Current - Supply:
- 2.7mA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 1.4 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
TLC254BCD FAQ
1.How can I place an order for TLC254BCD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC254BCD 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 TLC254BCD reliable?
The price and inventory of TLC254BCD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC254BCD is usually 5 days.
3.What payment methods are accepted for TLC254BCD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC254BCD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC254BCD?
TLC254BCD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC254BCD 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 TLC254BCD?
For technical support, including TLC254BCD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC254BCD requirements.
6.How does Aetrix verify that TLC254BCD is sourced from the original manufacturer or authorized distributors?
All TLC254BCD 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 TLC254BCD meets industry standards.
7.What is the process for return or replacement of TLC254BCD?
All TLC254BCD units undergo pre-shipment inspection (PSI). If there is an issue with TLC254BCD, 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 TLC254BCD part is unused and in its original packaging.
Return procedure for TLC254BCD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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