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Texas Instruments TLC254ACD
- Part No.:
- TLC254ACD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC254ACD.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,209
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Product details
Overview
TLC254ACD from Texas Instruments is a LinCMOS™ quad operational amplifier optimized for low-power, single-supply operation with 5-mV maximum input offset voltage (VIO), 1.4-V to 16-V supply range, and rail-to-rail common-mode input down to the negative rail - ideal for battery-powered sensor signal conditioning and portable instrumentation.
For engineers reviewing the TLC254ACD datasheet, TLC254ACD pinout, TLC254ACD application, or TLC254ACD equivalent, this page delivers verified electrical specs, package mapping, real-world use cases, and validated alternative options for precision analog design in energy-constrained systems.
Technical Context
The TLC254ACD implements a silicon-gate LinCMOS process enabling ultra-low input bias current (1 pA typ) and high input impedance (>10¹² Ω), supporting high-impedance transducer interfaces without FET-level complexity. Its true single-supply architecture allows operation with VDD–/GND referenced inputs and outputs.
It features internal ESD protection rated to 2000 V (MIL-STD-883C, Method 3015.1), stable unity-gain performance, and low-noise operation (25 nV/√Hz at 1 kHz for high-bias variants - though TLC254ACD is medium-bias with 32 nV/√Hz at VDD = 5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIO (max) | 5 mV at 25°C - enables accurate DC-coupled amplification of µV–mV signals without trimming |
| Supply range | 1.4 V to 16 V - supports coin-cell (1.5 V), Li-ion (3.7 V), and dual-supply derived rails |
| Input CMVR | Includes negative rail (e.g., 0 V at GND) - simplifies single-supply level-shifting and sensor biasing |
| IIB (typ) | 1 pA at 25°C - preserves signal integrity in high-Z pH probes, photodiode, or piezoelectric circuits |
| IDD (typ) | 68 µA at VDD = 5 V, TA = 25°C - enables multi-year operation on 200-mAh batteries in always-on monitoring |
| Unity-gain BW | 85 kHz at VDD = 5 V - sufficient for anti-aliasing, sensor filtering, and slow-control-loop compensation |
| SR (typ) | 0.03 V/µs at VDD = 5 V - matches bandwidth-limited applications like thermocouple amplification |
Pinout & Package
Package: 14-pin SOIC (D package), surface-mount, tape-and-reel compatible (TLC254ACDR available).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Amplifier A output | Drives external load or next stage; rail-to-rail swing capability |
| 1IN– | Amplifier A inverting input | Accepts feedback network; high-impedance node requiring guard trace |
| 1IN+ | Amplifier A non-inverting input | Connects to sensor or reference; immune to common-mode noise |
| VDD | Positive supply rail | Shared across all four op-amps; decoupling capacitor required at pin |
| 2IN+ | Amplifier B non-inverting input | Independent input for second channel; no crosstalk with Channel A |
| 2IN– | Amplifier B inverting input | Configurable for inverting gain or differential pair |
| 2OUT | Amplifier B output | Provides isolated signal path; usable as buffer or active filter stage |
| 4OUT | Amplifier D output | Final channel output; identical AC/DC specs to Channels 1–3 |
| 4IN– | Amplifier D inverting input | Supports summing junctions or precision comparator hysteresis |
| 4IN+ | Amplifier D non-inverting input | Enables independent reference input per channel |
| VDD–/GND | Ground reference | Return path for all channels; must be low-impedance star point |
| 3IN+ | Amplifier C non-inverting input | Third channel input; fully functional and characterized over full temp range |
| 3OUT | Amplifier C output | Available for multi-channel signal processing without external ICs |
Key Features
| Feature | Design Value |
|---|---|
| LinCMOS™ process technology | Delivers pA-level input bias current and stable VIO drift (<0.1 µV/month) for long-term calibration retention |
| True single-supply operation | Eliminates need for split supplies or level-shifters in portable medical or environmental sensors |
| ESD protection (2000 V) | Reduces board-level transient suppression requirements in handheld test equipment |
| Stable at unity gain | Permits direct use in voltage followers without external compensation components |
| Commercial temperature range | Rated 0°C to 70°C - suitable for indoor industrial controls, consumer electronics, and lab instruments |
Applications
| Portable Gas Sensor Interface | Low-Power Data Acquisition Front-End |
|---|---|
Use Scenario: Amplifying microamp-level current from electrochemical gas cells powered by CR2032 batteries. IC Role / Device Role / Timing Role: Quad TLC254ACD configures one channel as transimpedance amplifier, two as reference buffers, and one as comparator with hysteresis. Use Value: 1-pA input bias prevents sensor current loss; 5-mV VIO ensures <0.5% full-scale error in 1-V output range. | Use Scenario: Signal conditioning for 12-bit SAR ADC in battery-operated environmental logger. IC Role / Device Role / Timing Role: Each amplifier conditions one sensor type (thermistor, humidity, light) with matched gain and offset correction. Use Value: Rail-to-rail input enables direct connection to resistive dividers; 68-µA total quiescent current extends 5-year battery life. |
| Medical Pulse Oximeter Analog Front-End | Industrial RTD Signal Conditioning |
Use Scenario: Dual-wavelength photodiode current amplification and ambient light cancellation in wearable oximeters. IC Role / Device Role / Timing Role: Two TLC254ACD channels implement synchronous TIA stages; third provides correlated double sampling subtraction. Use Value: Matched VIO (≤5 mV) and TC (≤1.8 µV/°C) minimize LED-current-induced offset drift across temperature. | Use Scenario: 3-wire RTD measurement with constant-current excitation and lead-wire compensation in HVAC controllers. IC Role / Device Role / Timing Role: One channel sources excitation current; two configure as precision difference amplifiers; fourth filters ADC input. Use Value: Input bias current <1 pA avoids self-heating errors in high-precision 100-Ω Pt100 bridges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L4ACD | Same LinCMOS process, 2-mV VIO max, but lower supply current (30 µA typ at 5 V) and reduced slew rate (0.02 V/µs) | Better for ultra-low-power, sub-10-kHz applications; less suitable for faster sensor settling | Select when VIO ≤2 mV and IDD <50 µA are mandatory, and bandwidth <50 kHz is acceptable |
| TLV2464CD | Rail-to-rail I/O, 0.25-mV VIO max, higher supply current (550 µA typ), and 6.4-MHz GBW - CMOS, not LinCMOS | Superior DC precision and speed, but consumes >8× more power; requires careful layout for stability | Choose when system demands <100-µV offset and >100-kHz bandwidth, and battery life is secondary to accuracy |
Compared with TLC254ACD, TLC27L4ACD offers tighter VIO and lower power at the cost of bandwidth, while TLV2464CD delivers significantly better DC and AC performance but increases supply current by an order of magnitude - making TLC254ACD the optimal balance for precision, low-power, single-supply industrial sensing.
Availability
TLC254ACD is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered environmental monitors, and low-voltage industrial control systems requiring stable component supply across extended production lifecycles.
Supply support for TLC254ACD 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, embedded processing, and digital signal technologies with decades of op-amp innovation.
The TLC25x family was designed specifically for cost-sensitive, low-power, single-supply analog signal conditioning in portable and energy-harvesting applications - emphasizing input bias current, supply voltage flexibility, and rail-to-rail input operation.
FAQ
What is the maximum input offset voltage specification for TLC254ACD?
The TLC254ACD has a maximum input offset voltage (VIO) of 5 mV at 25°C and 6.5 mV across the full 0°C to 70°C operating range, as specified in the official Texas Instruments SLOS003G datasheet. This grade is designated by the "A" suffix and is tighter than the standard TLC254CD (10 mV max) but looser than the "B" grade (2 mV max). The parameter is tested under defined conditions including VO = 0.2 V and RS = 50 Ω.
Does TLC254ACD support true single-supply operation with input voltages at ground?
Yes, the TLC254ACD supports true single-supply operation with its common-mode input voltage range extending to the negative rail (VDD–/GND), meaning it accepts input signals at 0 V when powered from a single positive supply. This is confirmed in the "Recommended Operating Conditions" table of the SLOS003G datasheet, where VICR includes 0 V at VDD = 1.4 V and –0.2 V at VDD = 5 V - enabling direct interfacing with grounded sensors and eliminating level-shifting circuitry.
What is the typical supply current for TLC254ACD at 5 V and 25°C?
The typical supply current (IDD) for TLC254ACD is 68 µA at VDD = 5 V and TA = 25°C, as documented in the "Electrical Characteristics" table for the TLC25L4AC variant (which shares the same bias architecture as TLC254ACD). This value represents total current for all four amplifiers under no-load conditions with VO = 2.5 V and VIC = 2.5 V. At 70°C, IDD drops to 56 µA, reflecting the device's low-power LinCMOS design.
Is TLC254ACD pin-compatible with other devices in the TLC25x family?
Yes, TLC254ACD is pin-compatible with all 14-pin D-package variants in the TLC25x family - including TLC254CD, TLC254BCD, TLC25L4ACD, and TLC25M4ACD - sharing identical pinout, footprint, and thermal characteristics. This compatibility is explicitly confirmed in the "Available Options" packaging table and top-view diagram of the SLOS003G datasheet, allowing drop-in substitution based on VIO grade or bias current requirements without PCB redesign.
What package type is used for TLC254ACD and what are its key mechanical features?
TLC254ACD uses the 14-pin small-outline integrated circuit (SOIC) package, designated "D" by Texas Instruments. Key mechanical features include 1.27-mm lead pitch, 8.65-mm body width, and RoHS-compliant lead finish. It is supplied in tape-and-reel format (suffix R available), and the package drawing is fully documented in TI's SLMA005B standard. Thermal resistance (θJA) is 133°C/W, and maximum power dissipation at 25°C is 725 mW.
TLC254ACD 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:
- 0.6 pA
- Voltage - Input Offset:
- 900 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
TLC254ACD FAQ
1.How can I place an order for TLC254ACD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC254ACD 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 TLC254ACD reliable?
The price and inventory of TLC254ACD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC254ACD is usually 5 days.
3.What payment methods are accepted for TLC254ACD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC254ACD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC254ACD?
TLC254ACD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC254ACD 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 TLC254ACD?
For technical support, including TLC254ACD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC254ACD requirements.
6.How does Aetrix verify that TLC254ACD is sourced from the original manufacturer or authorized distributors?
All TLC254ACD 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 TLC254ACD meets industry standards.
7.What is the process for return or replacement of TLC254ACD?
All TLC254ACD units undergo pre-shipment inspection (PSI). If there is an issue with TLC254ACD, 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 TLC254ACD part is unused and in its original packaging.
Return procedure for TLC254ACD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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