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Texas Instruments TLC2254MFKB
- Part No.:
- TLC2254MFKB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 20-CLCC
- Datasheet:
-
TLC2254MFKB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 20LCCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,515
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Product details
Overview
TLC2254MFKB from Texas Instruments is a quad rail-to-rail output, very low-power operational amplifier in a ceramic chip carrier (FK) package, rated for –55°C to 125°C operation. It delivers 19 nV/√Hz input voltage noise at 1 kHz, 1 pA typical input bias current, and 35 µA per channel supply current. Its rail-to-rail output swing and common-mode input range extending to the negative rail make it suitable for precision signal conditioning in battery-powered sensor interfaces and analog front-ends for data acquisition systems.
For engineers reviewing the TLC2254MFKB datasheet, TLC2254MFKB pinout, TLC2254MFKB application, or TLC2254MFKB equivalent, key selection criteria include its micropower consumption, rail-to-rail output capability under ±2.2 V to ±8 V supplies, low-input-bias-current performance for high-impedance sources, and extended temperature qualification for aerospace and military embedded systems.
Technical Context
The TLC2254MFKB implements Advanced LinCMOS™ process technology to achieve rail-to-rail output swing while maintaining ultra-low quiescent current. Its input stage supports common-mode voltages down to the negative supply rail, enabling single-supply operation with ground-referenced inputs.
Each of the four amplifiers features fully differential input architecture with >10¹² Ω input resistance, 70–88 dB CMRR across temperature, and stable unity-gain operation with 63° phase margin into 50 kΩ//100 pF loads - verified for both single- and split-supply configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±2.2 V to ±8 V - supports wide industrial and military power rails without level-shifting circuitry |
| Input Bias Current | 1 pA typ - enables direct interfacing with piezoelectric transducers and high-Z pH sensors |
| Output Swing | Rail-to-rail - delivers full dynamic range into ADCs with 0–5 V or ±2.5 V reference spans |
| Input Noise Voltage | 19 nV/√Hz @ 1 kHz - 4× lower than legacy micropower CMOS op-amps, critical for low-level signal integrity |
| Quiescent Current | 35 µA per channel - allows four-channel precision amplification in sub-200 µA total system budget |
| Input Offset Voltage | 1500 µV max (TLC2254M) - specified over full –55°C to 125°C range for untrimmed military-grade performance |
| Common-Mode Input Range | Includes negative rail - permits true single-supply operation with inputs referenced to ground |
Pinout & Package
Ceramic chip carrier (FK) package, 14-terminal, hermetically sealed, leadless, surface-mountable with solder reflow compatibility. Designed for high-reliability, high-temperature environments including aerospace and defense applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OUT | Amplifier A output - rail-to-rail capable, drives 50 kΩ load with <0.15 V headroom at 500 µA |
| 2 | 1IN– | Inverting input of Amp A - high-impedance node (10¹² Ω), sensitive to PCB leakage paths |
| 3 | 1IN+ | Non-inverting input of Amp A - matched to Pin 2 for optimal CMRR; requires symmetrical layout |
| 4 | VDD+ | Positive supply rail - decoupling capacitor required within 5 mm for stability at 25 kHz |
| 5 | 2IN+ | Non-inverting input of Amp B - electrically isolated from other inputs; no internal connection to substrate |
| 6 | 2IN– | Inverting input of Amp B - shares same process characteristics as Pins 2 and 3 for channel matching |
| 7 | 2OUT | Amplifier B output - identical AC/DC specs to Pin 1; may be paralleled only with external resistors |
| 8 | 4OUT | Amplifier D output - fourth independent output; not internally connected to any other pin |
| 9 | 4IN– | Inverting input of Amp D - pin 9 is functionally identical to Pins 2 and 6; no shared bias network |
| 10 | 4IN+ | Non-inverting input of Amp D - matches Pin 3 electrical behavior; layout symmetry critical for PSRR |
| 11 | VDD–/GND | Negative supply or ground reference - serves as return path for all four amplifiers; star grounding recommended |
| 12 | 3IN+ | Non-inverting input of Amp C - independent node; no internal coupling to other inputs |
| 13 | 3IN– | Inverting input of Amp C - fully differential pair with Pin 12; offset drift tracked across temperature |
| 14 | 3OUT | Amplifier C output - completes quad configuration; supports individual gain-setting feedback networks |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full supply voltage range at output - eliminates need for level-shifting when driving SAR or sigma-delta ADCs |
| Ultra-low input bias current | 1 pA typical - preserves signal integrity from high-impedance sources like photodiodes and electret microphones |
| Military-grade temperature range | –55°C to 125°C operation - qualified per MIL-PRF-38535 for avionics and space-qualified subsystems |
| Low input voltage noise | 19 nV/√Hz at 1 kHz - enables resolution of µV-level signals in strain gauge and thermocouple amplifiers |
| Single- and split-supply compatible | Fully characterized from ±2.2 V to ±8 V - simplifies design reuse across portable, industrial, and automotive platforms |
Applications
| Strain Gauge Signal Conditioning | Avionics Sensor Interface |
|---|---|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from metallic strain gauges in flight control surfaces. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with rail-to-rail output driving 16-bit ADC reference buffer. Use Value: 1 pA input bias current prevents bridge imbalance error; 19 nV/√Hz noise ensures <0.05% measurement uncertainty at 10 Hz bandwidth. | Use Scenario: Signal conditioning for RTD and thermocouple inputs in engine monitoring units operating at –55°C ambient. IC Role / Device Role / Timing Role: Cold-junction compensation amplifier and linearization stage in multi-sensor fusion module. Use Value: –55°C to 125°C guaranteed operation eliminates derating; rail-to-rail output maintains full ADC code utilization across temperature extremes. |
| Portable Medical ECG Front-End | Space-Qualified Data Acquisition |
Use Scenario: Low-noise, low-power amplification of biopotential signals (<5 mVpp) in handheld ECG devices. IC Role / Device Role / Timing Role: First-stage gain block with high-pass filtering and DC suppression before digitization. Use Value: 35 µA per channel enables 4-channel simultaneous acquisition within 200 µA total supply budget - extends battery life beyond 72 hours. | Use Scenario: Analog signal preprocessing for radiation-hardened telemetry systems on LEO satellites. IC Role / Device Role / Timing Role: Input buffer and anti-aliasing filter driver for radiation-tolerant SAR ADCs. Use Value: Ceramic FK package provides hermetic sealing and TCT survivability; 10¹² Ω input resistance minimizes leakage-induced drift in vacuum environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad low-power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP482HSZ | Higher supply current (350 µA/channel), wider GBW (4 MHz), but no rail-to-rail output | Better for high-speed active filters; unsuitable where full output swing is required | Select when slew rate >0.1 V/µs and drive capability >10 mA are needed - not for micropower rail-to-rail use cases |
| TLC2274CDR | Commercial temp range (0°C to 70°C), plastic SOIC-14, 125 µA/channel supply current | Lower cost for non-military terrestrial applications; lacks hermeticity and extended temperature rating | Choose for cost-sensitive industrial controls where –55°C operation and ceramic reliability are unnecessary |
Compared with OP482HSZ and TLC2274CDR, the TLC2254MFKB uniquely combines military-grade temperature range, ceramic hermetic packaging, rail-to-rail output, and sub-40 µA/channel quiescent current - making it irreplaceable in size-, power-, and reliability-constrained aerospace signal chains.
Availability
TLC2254MFKB is available at Aetrix Electronics and suitable for avionics sensor interfaces, space-qualified data acquisition modules, and portable medical ECG front-ends requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TLC2254MFKB 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 for industrial, automotive, and aerospace markets.
The TLC225x family was engineered specifically for ultra-low-power, high-precision analog signal conditioning in harsh-environment applications - emphasizing rail-to-rail output, nanovolt-level noise, and extended temperature reliability over speed or drive strength.
FAQ
What is the maximum operating temperature range for the TLC2254MFKB?
The TLC2254MFKB is rated for continuous operation from –55°C to 125°C. This specification is validated per MIL-PRF-38535 requirements and applies across all electrical parameters in the datasheet, including input offset voltage, CMRR, and output swing. The ceramic FK package contributes to thermal stability and mechanical robustness under thermal cycling stress.
Does the TLC2254MFKB support true single-supply operation with ground-referenced inputs?
Yes, the TLC2254MFKB supports true single-supply operation. Its common-mode input voltage range extends to the negative rail (VDD–/GND), and its output swings rail-to-rail. When powered from 0 V and +5 V, inputs can be referenced to 0 V, and the output will swing from near 0 V to near +5 V - enabling direct interface with unipolar ADCs without level-shifting circuitry.
What is the input bias current specification for the TLC2254MFKB, and why does it matter in high-impedance circuits?
The TLC2254MFKB has a typical input bias current of 1 pA, with a maximum of 100 pA over temperature. This ultra-low value prevents loading errors in high-impedance sensor interfaces - such as piezoelectric accelerometers or glass pH electrodes - where even nanoampere currents would introduce significant offset and drift. Maintaining picoampere-level bias ensures signal fidelity without active guarding or bootstrapping.
Can the TLC2254MFKB drive capacitive loads, and what is its phase margin?
The TLC2254MFKB is stable with 100 pF capacitive loads when driving into 50 kΩ, exhibiting 63° phase margin and 15 dB gain margin at unity gain. For larger capacitive loads (>100 pF), an isolation resistor (≥100 Ω) between output and capacitance is recommended. Its closed-loop output impedance is 200 Ω at 25 kHz, confirming robust small-signal drive capability within its specified bandwidth.
How does the TLC2254MFKB differ from the TLC2254A variant?
The TLC2254MFKB is the untrimmed military-grade version with 1500 µV maximum input offset voltage over –55°C to 125°C, while the TLC2254AMFKB is the trimmed version with 850 µV max offset. Both share identical pinout, package, noise, power, and rail-to-rail performance. The "M" suffix denotes the extended temperature range and MIL-PRF-38535 qualification; the absence of "A" indicates the standard offset grade.
TLC2254MFKB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 20-CLCC
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.12V/µs
- Gain Bandwidth Product:
- 210 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 160µA (x4 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 4.4 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
TLC2254MFKB FAQ
1.How can I place an order for TLC2254MFKB through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2254MFKB 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 TLC2254MFKB reliable?
The price and inventory of TLC2254MFKB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2254MFKB is usually 5 days.
3.What payment methods are accepted for TLC2254MFKB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2254MFKB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2254MFKB?
TLC2254MFKB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2254MFKB 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 TLC2254MFKB?
For technical support, including TLC2254MFKB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2254MFKB requirements.
6.How does Aetrix verify that TLC2254MFKB is sourced from the original manufacturer or authorized distributors?
All TLC2254MFKB 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 TLC2254MFKB meets industry standards.
7.What is the process for return or replacement of TLC2254MFKB?
All TLC2254MFKB units undergo pre-shipment inspection (PSI). If there is an issue with TLC2254MFKB, 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 TLC2254MFKB part is unused and in its original packaging.
Return procedure for TLC2254MFKB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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