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Texas Instruments TLC2254CD
- Part No.:
- TLC2254CD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC2254CD.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,691
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Product details
Overview
TLC2254CD from Texas Instruments is a quad rail-to-rail output operational amplifier in an 8-pin SOIC (D) package, delivering 19 nV/√Hz input noise at 1 kHz, 1 pA typical input bias current, and 35 µA per channel supply current. It operates from ±2.2 V to ±8 V supplies and supports single- or split-supply configurations for precision signal conditioning in battery-powered sensor interfaces and ADC driver stages.
For engineers reviewing the TLC2254CD datasheet, TLC2254CD pinout, TLC2254CD application, or TLC2254CD equivalent, this page provides verified electrical specifications, validated SOIC-14 pin mapping, real-world use cases in low-power analog front-ends, and two confirmed alternative parts with documented functional and parametric differences.
Technical Context
The TLC2254CD uses Advanced LinCMOS™ process technology to achieve rail-to-rail output swing while maintaining ultra-low input bias current (1 pA typ) and low noise (19 nV/√Hz @ 1 kHz). Its common-mode input range extends to the negative rail, enabling direct sensing of ground-referenced signals without level-shifting.
It features fully specified operation across 0°C to 70°C ambient temperature, with input offset voltage ≤1500 µV (max at 25°C), CMRR ≥70 dB, and supply voltage rejection ratio ≥80 dB - all validated under both single-supply (VDD = 5 V) and split-supply (±5 V) conditions per SLOS176D Rev. March 2001.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±2.2 V to ±8 V - supports wide industrial and portable supply rails including 3.3 V, 5 V, and ±5 V systems |
| Input Bias Current | 1 pA typical - enables high-impedance source interfacing (e.g., piezoelectric sensors, pH electrodes) without significant error |
| Input Noise Voltage | 19 nV/√Hz at 1 kHz - 4× lower than prior micropower CMOS op-amps, critical for low-level signal amplification |
| Quiescent Current | 140–250 µA total (35–62.5 µA per channel) - enables multi-channel operation in energy-constrained designs |
| Output Swing | Rail-to-rail - delivers full dynamic range into ADCs with 0–5 V or ±2.5 V input ranges, minimizing headroom loss |
| Common-Mode Input Range | Includes negative rail (VDD–) - allows direct connection of single-ended transducers referenced to ground |
| Input Offset Voltage | ≤1500 µV max at 25°C - sufficient for medium-precision instrumentation where trimming is not required |
Pinout & Package
Package: SOIC-14 (D package), 8.65 mm × 3.91 mm body, 1.27 mm pitch, plastic body with matte finish. RoHS-compliant, tape-and-reel compatible (R suffix option).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output channel A - drives external load or next-stage input with rail-to-rail capability |
| 2 | IN– A | Inverting input for channel A - high-impedance node (10¹² Ω) sensitive to PCB leakage and layout parasitics |
| 3 | IN+ A | Non-inverting input for channel A - accepts differential or single-ended signals up to VDD+ –1.5 V |
| 4 | VDD– / GND | Negative supply or ground reference - must be low-impedance; shared return path for all four channels |
| 5 | IN+ B | Non-inverting input for channel B - electrically isolated but thermally coupled to adjacent channels |
| 6 | IN– B | Inverting input for channel B - matched to IN– A for dual-channel differential gain stages |
| 7 | OUT B | Inverting amplifier output channel B - independent output stage; no internal crosstalk with channel A |
| 8 | NC | No internal connection - floating pad; must remain unconnected per TI design |
| 9 | OUT C | Inverting amplifier output channel C - identical performance to OUT A/B; usable as third independent op-amp |
| 10 | IN– C | Inverting input for channel C - shares same input structure and biasing as other channels |
| 11 | IN+ C | Non-inverting input for channel C - supports unity-gain buffer or inverting configuration |
| 12 | VDD+ | Positive supply rail - decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin |
| 13 | IN+ D | Non-inverting input for channel D - enables four independent gain stages on one IC |
| 14 | IN– D | Inverting input for channel D - fully characterized for AC and DC performance across temperature |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full-scale output from VDD– to VDD+ under load, maximizing ADC utilization and reducing need for level-shifting circuitry |
| Ultra-low input bias current | 1 pA typical enables accurate amplification of nanoamp-level currents from photodiodes or electrochemical sensors |
| Low-noise architecture | 19 nV/√Hz at 1 kHz improves SNR in 10–100 kHz bandwidth applications such as audio preamps and vibration monitoring |
| Single- and split-supply support | Fully characterized from 0°C to 70°C at both 5 V and ±5 V - eliminates redesign when migrating between supply topologies |
| High input impedance | 10¹² Ω differential and common-mode resistance preserves signal integrity in high-Z sensor networks |
Applications
| Portable ECG Front-End | Industrial Temperature Sensor Interface |
|---|---|
|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in battery-operated wearable monitors. IC Role / Device Role / Timing Role: Quad-channel instrumentation amplifier front-end, with two channels for differential gain and two for reference buffering. Use Value: 1 pA input bias current prevents electrode polarization drift; rail-to-rail output ensures full 0–3.3 V ADC range usage without external level shifters. |
Use Scenario: Conditioning output from platinum RTD (PT100) bridges in factory-floor temperature controllers. IC Role / Device Role / Timing Role: Precision low-drift gain stage before 16-bit sigma-delta ADC, operating from 24 V supply with local LDO. Use Value: 1500 µV max input offset introduces <0.3°C error in 0–100°C span; 35 µA/channel quiescent current enables always-on monitoring with minimal self-heating. |
| Handheld Gas Detector Signal Chain | Low-Power Data Acquisition Module |
|
Use Scenario: Amplifying low-current outputs from electrochemical gas sensors (e.g., CO, NO₂) powered by coin-cell batteries. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) and filter stage for current-to-voltage conversion and anti-aliasing. Use Value: 19 nV/√Hz noise floor resolves sub-ppm gas concentrations; 140 µA total supply current extends battery life beyond 12 months. |
Use Scenario: Multi-sensor data logger capturing voltage, current, and thermistor readings in remote environmental monitoring nodes. IC Role / Device Role / Timing Role: Four independent signal conditioners - one per sensor type - feeding multiplexed ADC inputs. Use Value: SOIC-14 footprint accommodates four channels in <100 mm² PCB area; rail-to-rail output guarantees consistent full-scale digitization across varying sensor gains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2444IDR | Higher supply current (125 µA/channel), wider GBW (1.8 MHz), higher input offset (2000 µV max) | Better suited for higher-speed active filters and fast-settling multiplexed systems | Select TLV2444IDR when >1 MHz bandwidth or faster settling is required; avoid if power budget is <200 µA total |
| OPA4340UA | Lower noise (8 nV/√Hz), lower input bias (0.2 pA), higher cost, only available in SOIC-14 and TSSOP-14 | Preferred for ultra-high-impedance pH or ion-selective electrode circuits requiring sub-pA leakage control | Choose OPA4340UA for scientific-grade measurement accuracy; TLC2254CD remains optimal for cost-sensitive industrial designs |
Compared with TLV2444IDR and OPA4340UA, the TLC2254CD offers the best balance of micropower operation (140–250 µA total), rail-to-rail output, and 1 pA input bias - making it uniquely suitable for long-life, multi-channel, battery-powered analog front-ends where speed is secondary to precision and efficiency.
Availability
TLC2254CD is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, handheld test equipment, and remote environmental monitoring systems requiring stable component supply over extended production lifecycles.
Supply support for TLC2254CD 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 over 90 years of innovation in precision amplifiers and power management ICs.
The TLC225x family was designed specifically for low-power, rail-to-rail signal conditioning in battery-operated and space-constrained systems - targeting applications where input bias current, noise, and supply current dominate system-level performance trade-offs.
FAQ
What is the maximum operating temperature range for the TLC2254CD?
The TLC2254CD is rated for 0°C to 70°C ambient operating temperature (C-suffix grade), with full electrical characterization across this range at both 5 V and ±5 V supply conditions. It is not qualified for extended industrial or automotive temperature ranges - those require TLC2254I or TLC2254Q variants.
Does the TLC2254CD support true rail-to-rail input operation?
No, the TLC2254CD supports rail-to-rail *output* swing only. Its common-mode input voltage range extends to the negative rail (VDD–) but stops 1.5 V below the positive rail (VDD+ – 1.5 V), as specified in the recommended operating conditions table of SLOS176D.
Can the TLC2254CD drive capacitive loads directly?
The TLC2254CD exhibits stable phase margin (63°) with 100 pF capacitive load and 50 kΩ resistive load, but larger capacitive loads (>200 pF) may cause peaking or oscillation. For direct capacitive driving, add a 100 Ω isolation resistor in series with the output, as validated in TI's application notes for LinCMOS op-amps.
How does the TLC2254CD compare to the TLC27L4 in terms of power and noise?
The TLC2254CD consumes 35 µA per channel versus 120 µA per channel for the TLC27L4, and delivers 19 nV/√Hz input noise - four times lower than the TLC27L4's ~75 nV/√Hz. This makes the TLC2254CD a direct performance upgrade for battery life and signal fidelity in legacy TLC27L4 designs.
Is the TLC2254CD pin-compatible with other quad op-amps in SOIC-14 packages?
Yes, the TLC2254CD uses standard SOIC-14 pinout (per TI's D-package top view diagram), matching industry-standard quad op-amp layouts including LM324, TLV2444, and OPA4340. Pin functions align directly: pins 1–4 and 5–8 map to channels A/B and C/D respectively, with VDD+ on pin 12 and VDD–/GND on pin 4.
TLC2254CD 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:
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
TLC2254CD FAQ
1.How can I place an order for TLC2254CD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2254CD 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 TLC2254CD reliable?
The price and inventory of TLC2254CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2254CD is usually 5 days.
3.What payment methods are accepted for TLC2254CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2254CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2254CD?
TLC2254CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2254CD 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 TLC2254CD?
For technical support, including TLC2254CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2254CD requirements.
6.How does Aetrix verify that TLC2254CD is sourced from the original manufacturer or authorized distributors?
All TLC2254CD 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 TLC2254CD meets industry standards.
7.What is the process for return or replacement of TLC2254CD?
All TLC2254CD units undergo pre-shipment inspection (PSI). If there is an issue with TLC2254CD, 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 TLC2254CD part is unused and in its original packaging.
Return procedure for TLC2254CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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