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Texas Instruments TLC25L4ACD
- Part No.:
- TLC25L4ACD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC25L4ACD.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TLC25L4ACD from Texas Instruments is a LinCMOS™ quad operational amplifier optimized for ultra-low-power, single-supply operation down to 1.4 V, with 5-mV max input offset voltage, 40–68 µA total supply current (at 5 V), and rail-to-rail common-mode input range extending to the negative rail. It serves as a precision analog signal conditioner in battery-powered sensor interfaces and portable instrumentation.
For engineers reviewing the TLC25L4ACD datasheet, TLC25L4ACD pinout, TLC25L4ACD application, or TLC25L4ACD equivalent, this page delivers verified electrical specs, package mapping, real-world use cases, and validated alternative options - all grounded in TI's SLOS003G production data sheet and official characterization across 0°C to 70°C.
Technical Context
The TLC25L4ACD implements a silicon-gate LinCMOS™ process, delivering picoamp-level input bias and offset currents (≤60 pA typ), enabling high-impedance transducer interfacing without significant error. Its low-bias architecture trades slew rate (0.03–0.05 V/µs) and unity-gain bandwidth (85–110 kHz at 5 V) for minimal quiescent current.
It supports true single-supply operation with common-mode input voltage ranging from –0.2 V to (VDD – 0.6) V, and output swing limited by load impedance - specified with RL = 1 MΩ for low-bias variants. ESD protection meets MIL-STD-883C, Method 3015.1 (2000 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4 V to 16 V - enables direct integration into single-cell Li-ion, NiMH, or solar-powered systems without regulation. |
| Input Offset Voltage (Max) | 5 mV at 25°C - grade-A selection ensures tighter DC accuracy than standard TLC25L4C (10 mV max) for precision amplification. |
| Total Supply Current (Typ) | 40 µA at 5 V, 25°C - four amplifiers draw less than 10 µA each, critical for multi-channel always-on sensing nodes. |
| Input Bias Current (Typ) | 0.6 pA at 5 V, 25°C - permits use with >100-MΩ feedback or sensor impedances without significant voltage error. |
| Common-Mode Input Range | Extends to VDD–/GND (–0.2 V min) - allows direct interface to ground-referenced sensors and single-supply signal chains. |
| Unity-Gain Bandwidth | 85 kHz at 5 V, 25°C - sufficient for DC–10 kHz signal conditioning (e.g., thermocouple, strain gauge, pH electrode outputs). |
| Equivalent Input Noise | 70 nV/√Hz at 1 kHz - higher than high-bias variants but acceptable for low-frequency, high-impedance applications where power dominates noise budget. |
Pinout & Package
Package: 14-pin Small Outline Integrated Circuit (SOIC) – D package, surface-mount, tape-and-reel compatible (suffix R available). Dimensions per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Amplifier 1 output | Buffered voltage output of first op-amp; drives high-impedance loads up to 1 MΩ with <50 mV low-level swing. |
| 1IN– | Amplifier 1 inverting input | Differential input node; accepts signals within –0.2 V to (VDD – 0.6) V; high-Z (≥10¹² Ω) minimizes loading. |
| 1IN+ | Amplifier 1 non-inverting input | Reference or signal input; identical CMVR and Zin as 1IN–; used in follower, summing, or differential configurations. |
| VDD | Positive supply rail | Single or dual supply connection; must be ≥1.4 V; decoupling capacitor (0.1 µF) recommended near pin. |
| 2IN+ | Amplifier 2 non-inverting input | Independent input for second op-amp; electrically isolated from other sections except shared VDD and GND rails. |
| 2IN– | Amplifier 2 inverting input | Matches 1IN– specs; supports individual gain-setting networks per channel without crosstalk. |
| 2OUT | Amplifier 2 output | Second independent output; same drive capability and swing limits as 1OUT. |
| 4OUT | Amplifier 4 output | Final op-amp output; pin 14 connects to VDD–/GND - not a dedicated negative supply pin but system ground reference. |
| 4IN– | Amplifier 4 inverting input | Fourth high-Z input; usable for multi-stage filtering or independent sensor channels. |
| 4IN+ | Amplifier 4 non-inverting input | Enables full utilization of all four amplifiers in compact space-constrained designs (e.g., 4-channel data acquisition). |
| VDD–/GND | Ground / negative supply | System return path; referenced for all inputs/outputs; no separate negative rail required in single-supply mode. |
| 3IN+ | Amplifier 3 non-inverting input | Third channel input; layout symmetry supports matched trace routing for differential pairs or parallel processing. |
| 3OUT | Amplifier 3 output | Third output; shares thermal and supply coupling characteristics with other sections but operates independently. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 40–68 µA total (all four op-amps) at 5 V - extends battery life in portable medical monitors and IoT edge nodes. |
| Rail-to-rail input capability | Common-mode range includes VDD–/GND (–0.2 V min) - eliminates level-shifting circuitry for ground-sensed signals. |
| Picoampere input bias | ≤60 pA typical - preserves signal integrity when amplifying from high-output-impedance sources like piezoelectric sensors. |
| Low-voltage operation | Functional down to 1.4 V supply - supports direct connection to partially discharged primary cells or energy-harvesting storage. |
| ESD robustness | 2000 V HBM rating per MIL-STD-883C - reduces handling sensitivity and improves field reliability in uncontrolled environments. |
Applications
| Portable Gas Sensor Interface | Multi-Channel Thermistor Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying microvolt-level output from electrochemical gas sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with low input bias to prevent sensor polarization and offset drift. Use Value: Enables 12-bit effective resolution without external zero-drift correction, leveraging 5-mV VIOmax and sub-100-pA IIB. |
Use Scenario: Simultaneous linearization and amplification of four NTC thermistors in HVAC control panels. IC Role / Device Role / Timing Role: Quad buffer/gain stage converting high-impedance thermistor voltage dividers into low-Z outputs for ADC input. Use Value: Single SOIC replaces four discrete op-amps, reducing PCB area by >60% while maintaining channel-to-channel matching. |
| Low-Power pH Electrode Front-End | Solar-Powered Environmental Data Logger |
|
Use Scenario: High-impedance (>1 GΩ) pH probe signal conditioning in handheld water quality testers. IC Role / Device Role / Timing Role: FET-input-equivalent amplifier providing stable DC gain without leakage-induced drift. Use Value: 0.6 pA typical IIB prevents measurement error >10 mV over 24 hours, meeting ASTM D1293 pH accuracy requirements. |
Use Scenario: Analog front-end for temperature, humidity, and light sensors in off-grid weather stations. IC Role / Device Role / Timing Role: Multi-function signal conditioner powering up only during periodic sampling bursts. Use Value: 40 µA quiescent current allows >1-year operation on 100 mAh Li-SOCl₂ cell with 1-min wake-up interval. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad low-power op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC25L4CD | 10-mV max VIO (vs. 5 mV for TLC25L4ACD); otherwise identical bias, noise, and supply specs. | Suitable where ±10 mV offset is acceptable (e.g., non-critical threshold detection), but not for calibrated sensor scaling. | Select TLC25L4CD only if cost sensitivity outweighs DC accuracy requirements; no PCB change needed. |
| LP324DR | Higher supply current (120 µA typ), wider VIO range (7 mV max), no guaranteed 1.4-V operation; CMOS input. | Better AC performance (300-kHz GBW) but unsuitable for sub-2-V systems or ultra-low-power sleep modes. | Choose LP324DR only when higher speed is mandatory and supply ≥2.7 V; requires validation of startup behavior at low VDD. |
Compared with TLC25L4CD, the TLC25L4ACD provides tighter initial offset for calibration-sensitive designs; versus LP324DR, it enables true single-cell operation and cuts quiescent power by >65%, at the expense of bandwidth.
Availability
TLC25L4ACD is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered environmental sensors, and low-voltage industrial monitoring requiring stable component supply across long-life product cycles.
Supply support for TLC25L4ACD 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 expertise in precision op-amps and low-power design.
The TLC25L4ACD belongs to TI's LinCMOS™ low-power op-amp family, engineered specifically for energy-constrained applications demanding rail-to-rail input, picoampere bias, and operation below 2 V.
FAQ
What is the minimum operating supply voltage for the TLC25L4ACD?
The TLC25L4ACD is fully specified down to 1.4 V supply voltage per TI's SLOS003G datasheet. It remains functional and stable at unity gain across the full 0°C to 70°C range at this voltage, making it suitable for direct connection to single alkaline or lithium primary cells without regulation. Operation below 1.4 V is not characterized and may result in degraded parameters including reduced output swing and increased offset drift.
Does the TLC25L4ACD support rail-to-rail output swing?
No, the TLC25L4ACD does not provide rail-to-rail output swing. Its output voltage swing is load-dependent: at 5 V supply with RL = 1 MΩ, VOH is typically 3.2–4.1 V and VOL is 0–50 mV. Output headroom increases with lower load impedance - e.g., with RL = 10 kΩ, swing degrades further. For true rail-to-rail output, consider TI's TLV2464 or similar modern alternatives.
How does the input offset voltage of TLC25L4ACD compare to TLC25L4CD?
The TLC25L4ACD is the "A-grade" variant with maximum input offset voltage of 5 mV at 25°C (6.5 mV over 0°C to 70°C), whereas the standard TLC25L4CD has a 10-mV max specification. Both share identical pinout, package, supply range, and bias current. The tighter VIO makes TLC25L4ACD preferred for applications requiring factory-calibrated gain stages or low-drift DC amplification without trimming.
Can TLC25L4ACD drive capacitive loads directly?
The TLC25L4ACD is not unity-gain stable into arbitrary capacitive loads. TI's datasheet specifies stability with CL ≤ 20 pF when driving RL = 1 MΩ. Driving larger capacitive loads (e.g., >50 pF) or cables without isolation resistance risks peaking or oscillation due to phase margin reduction (<35° at 25°C). For such cases, add a series resistor (≥100 Ω) between output and load to restore stability.
Is the TLC25L4ACD RoHS compliant and lead-free?
Yes, the TLC25L4ACD in the SOIC (D) package is RoHS compliant and lead-free per TI's packaging standards. The device carries the "Green" designation in TI's datasheet and ordering information, indicating compliance with EU Directive 2011/65/EU and J-STD-609 revision A. Lead-free finish uses matte tin plating over copper leadframe, qualified for reflow soldering per JEDEC J-STD-020.
TLC25L4ACD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Single-Ended
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 110 kHz
- -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
TLC25L4ACD FAQ
1.How can I place an order for TLC25L4ACD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC25L4ACD 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 TLC25L4ACD reliable?
The price and inventory of TLC25L4ACD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC25L4ACD is usually 5 days.
3.What payment methods are accepted for TLC25L4ACD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC25L4ACD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC25L4ACD?
TLC25L4ACD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC25L4ACD 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 TLC25L4ACD?
For technical support, including TLC25L4ACD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC25L4ACD requirements.
6.How does Aetrix verify that TLC25L4ACD is sourced from the original manufacturer or authorized distributors?
All TLC25L4ACD 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 TLC25L4ACD meets industry standards.
7.What is the process for return or replacement of TLC25L4ACD?
All TLC25L4ACD units undergo pre-shipment inspection (PSI). If there is an issue with TLC25L4ACD, 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 TLC25L4ACD part is unused and in its original packaging.
Return procedure for TLC25L4ACD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC25L4ACD Tags
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LM358DT
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LM358DR
Texas Instruments
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LM324PWR
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