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Texas Instruments TLC279CDR
- Part No.:
- TLC279CDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC279CDR.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,989
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Product details
Overview
TLC279CDR from Texas Instruments is a precision quad CMOS operational amplifier optimized for single-supply operation, featuring 900 µV max input offset voltage (25°C), 10.8 nV/√Hz input voltage noise at 1 kHz, and rail-to-rail output swing down to the negative rail. It operates from 3 V to 16 V over 0°C to 70°C and delivers high input impedance (>10¹² Ω) for low-level sensor signal conditioning in battery-powered instrumentation.
For engineers reviewing the TLC279CDR datasheet, TLC279CDR pinout, TLC279CDR application, or TLC279CDR equivalent, key selection criteria include its guaranteed 900 µV input offset voltage grade, single-supply compatibility with ground-sensing inputs, low-noise performance below 11 nV/√Hz, and SOIC-14 packaging suitable for space-constrained analog front-ends.
Technical Context
The TLC279CDR uses a polysilicon-gate CMOS process to achieve ultra-low input bias current (≤60 pA typical) and stable offset voltage drift (0.3 µV/°C). Its input stage supports common-mode voltages extending below ground, enabling true single-supply operation without level-shifting circuitry.
It integrates four independent amplifiers sharing one 14-pin SOIC package, each with unity-gain bandwidth of 4.5 MHz, slew rate of 0.5 V/µs (small-signal), and supply current of 2.24–6.4 mA (quad). The device maintains ≥65 dB CMRR and PSRR across temperature and supply variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input offset voltage | Max 900 µV at 25°C - enables high-accuracy DC-coupled amplification without trimming in precision sensor interfaces |
| Input voltage noise | 10.8 nV/√Hz at 1 kHz - supports low-noise amplification of microvolt-level signals from thermocouples or strain gauges |
| Supply voltage range | 3 V to 16 V - compatible with 3.3 V, 5 V, and 12 V logic rails and battery-powered systems |
| Common-mode input range | Extends to –0.1 V below GND at VDD = 5 V - allows direct sensing of ground-referenced signals |
| Output voltage swing | Down to GND (0 V) with load - eliminates need for negative supply in single-rail data acquisition |
| Input impedance | >10¹² Ω - minimizes loading on high-Z sources like pH electrodes or piezoelectric sensors |
| Unity-gain bandwidth | 4.5 MHz - supports stable closed-loop operation up to ~100 kHz with gain ≥10 |
Pinout & Package
TLC279CDR is housed in a 14-pin SOIC (D) package measuring 8.65 mm × 6 mm, with standard JEDEC MS-012AC footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Output | Amplifier channel 1 output - drives external loads up to ±30 mA |
| 1IN– | Input | Inverting input for channel 1 - accepts differential signals referenced to GND or VDD |
| 1IN+ | Input | Noninverting input for channel 1 - used for reference-based sensing or unity-gain buffering |
| VDD | Power | Positive supply rail - must be bypassed with 0.1 µF ceramic capacitor near pin |
| 2IN+ | Input | Noninverting input for channel 2 - supports independent signal paths per amplifier |
| 2IN– | Input | Inverting input for channel 2 - enables dual-channel instrumentation amplifier configurations |
| 2OUT | Output | Amplifier channel 2 output - electrically isolated from other outputs |
| 3OUT | Output | Amplifier channel 3 output - usable for multi-stage filtering or signal distribution |
| 3IN– | Input | Inverting input for channel 3 - supports cascaded gain stages |
| 3IN+ | Input | Noninverting input for channel 3 - configurable as buffer or comparator input |
| GND | Power | Negative supply / system ground - return path for all four amplifiers and bypass caps |
| 4IN+ | Input | Noninverting input for channel 4 - enables quad-channel simultaneous sampling |
| 4IN– | Input | Inverting input for channel 4 - used in differential receiver or active filter topologies |
| 4OUT | Output | Amplifier channel 4 output - supports independent feedback networks per channel |
Key Features
| Feature | Design Value |
|---|---|
| Low input offset voltage grade | 900 µV max (TLC279C) - highest precision grade in the TLC27xx family for minimal DC error |
| Rail-to-rail output swing | Drives to GND with no negative supply - simplifies power architecture in portable devices |
| Single-supply optimized input stage | Common-mode range includes negative rail - enables direct interface with 0 V–referenced transducers |
| Ultra-high input impedance | >10¹² Ω - preserves signal integrity from megohm-level sources without loading |
| ESD protection circuitry | Integrated protection on all pins - meets JEDEC JS-001 Class 2 (2 kV HBM) requirements |
Applications
| Instrumentation Amplifier Front-End | Portable Gas Sensor Signal Chain |
|---|---|
Use Scenario: Amplifying low-level differential signals from bridge-based pressure or load cells in industrial test equipment. IC Role / Device Role / Timing Role: TLC279CDR serves as the first-stage instrumentation amplifier core, providing matched gain and offset rejection across four channels. Use Value: Its 900 µV max VIO and 0.3 µV/°C drift ensure <±0.1% full-scale error over temperature without calibration. | Use Scenario: Conditioning microamp-level current output from electrochemical gas sensors in handheld air quality monitors. IC Role / Device Role / Timing Role: TLC279CDR acts as transimpedance amplifier and level-shifter, converting sensor current to voltage while rejecting supply ripple. Use Value: Input bias current ≤60 pA prevents signal corruption from high-impedance sensor nodes, preserving ppm-level detection accuracy. |
| Medical ECG Analog Front-End | Battery-Powered Data Logger |
Use Scenario: Amplifying mV-level biopotential signals from dry-electrode ECG patches in wearable health monitors. IC Role / Device Role / Timing Role: TLC279CDR functions as AC-coupled gain stage and right-leg drive amplifier, leveraging low noise and high ZIN. Use Value: 10.8 nV/√Hz noise floor ensures clean signal capture without amplifying thermal noise from electrode-skin interface. | Use Scenario: Multiplexing and amplifying temperature, humidity, and light sensor outputs in solar-powered environmental loggers. IC Role / Device Role / Timing Role: TLC279CDR provides quad-channel signal conditioning with shared VDD/GND, reducing component count and PCB area. Use Value: 3 V minimum supply enables direct operation from Li-ion or two-AA battery stacks, extending field life by minimizing quiescent current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC279IDR | Wider operating temperature range (–40°C to 85°C) and same 900 µV max VIO, but higher max supply current (8 mA vs 6.4 mA at 10 V) | Suitable for automotive cabin modules or industrial controllers requiring extended temp rating | Select TLC279IDR when ambient operating temperature exceeds 70°C; otherwise TLC279CDR offers lower cost and adequate performance for commercial-grade designs |
| OPA2333PWR | Zero-drift architecture, 10 µV max VIO, 0.15 µV/°C drift, but higher supply current (17 µA per amp) and no rail-to-rail output | Better for ultra-stable DC measurements where long-term drift dominates error budget | Choose OPA2333PWR only if sub-10 µV offset and near-zero drift are mandatory; TLC279CDR remains preferred for cost-sensitive, single-supply, rail-to-rail output needs |
Compared with TLC279IDR, TLC279CDR trades extended temperature capability for lower cost and marginally lower quiescent current; compared with OPA2333PWR, it sacrifices zero-drift stability for broader supply range, rail-to-rail output, and significantly lower unit price in volume production.
Availability
TLC279CDR is available at Aetrix Electronics and suitable for precision instrumentation, portable medical devices, and battery-powered sensor interfaces requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for TLC279CDR 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 signal-chain solutions.
The TLC27xx family was designed for cost-effective, high-accuracy analog signal conditioning in commercial and industrial systems where single-supply operation, low power, and robust DC specifications are critical.
FAQ
What is the maximum input offset voltage specification for TLC279CDR at 25°C?
The TLC279CDR has a maximum input offset voltage of 900 µV at 25°C, as specified in the Electrical Characteristics table under TLC279C conditions. This value is guaranteed across production lots and forms the basis for its classification as the highest-precision grade in the TLC27xx series. The TLC279CDR maintains this tight offset spec while delivering rail-to-rail output swing and single-supply compatibility.
Does TLC279CDR support true single-supply operation with inputs referenced to ground?
Yes, the TLC279CDR supports true single-supply operation with inputs extending to the negative rail (GND). Its common-mode input voltage range includes –0.1 V at VDD = 5 V, allowing direct connection of ground-referenced sensors without level-shifting circuitry. This feature is explicitly enabled by its CMOS input stage and is validated across the 0°C to 70°C operating range for the C-suffix variant. The TLC279CDR leverages this capability to simplify analog front-end design in battery-powered systems.
What is the typical input voltage noise density of TLC279CDR and at what frequency is it measured?
The TLC279CDR exhibits a typical input voltage noise density of 10.8 nV/√Hz at 1 kHz, as confirmed in Section 4.7 Operating Characteristics. This value is measured with RS = 20 Ω and reflects the device's low-noise performance in the audio and low-frequency sensor bandwidth. The noise profile remains flat across 10 Hz to 10 kHz, making the TLC279CDR suitable for amplifying microvolt-level signals from thermopiles, RTDs, and piezoresistive elements without introducing significant noise floor degradation.
Can TLC279CDR operate from a 3.3 V supply, and what are the implications for output swing?
Yes, the TLC279CDR is fully specified to operate from a 3 V supply (minimum) across 0°C to 70°C, making it compatible with standard 3.3 V logic rails. At 3.3 V, its output can swing from GND to approximately 2.8 V (typical VOH), maintaining functional rail-to-rail behavior on the low side and retaining >85% of full-scale dynamic range. This capability is confirmed in the Recommended Operating Conditions and Electrical Characteristics tables, ensuring reliable use in modern low-voltage embedded systems without sacrificing DC accuracy or noise performance.
How does the input bias current of TLC279CDR compare to bipolar op-amps, and why does it matter?
The TLC279CDR features a typical input bias current of ≤60 pA at 25°C - over six orders of magnitude lower than typical bipolar op-amps (e.g., LM324: ~45 nA). This ultra-low bias current prevents loading errors when interfacing with high-impedance sources such as pH electrodes, photodiodes, or capacitive sensors. In practice, it enables use of MΩ-range feedback and gain-setting resistors without introducing significant offset error, directly improving measurement fidelity in precision analog signal chains using the TLC279CDR.
TLC279CDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 3.6V/µs
- Gain Bandwidth Product:
- 2.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.6 pA
- Voltage - Input Offset:
- 320 µV
- Current - Supply:
- 2.7mA (x4 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
TLC279CDR FAQ
1.How can I place an order for TLC279CDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC279CDR 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 TLC279CDR reliable?
The price and inventory of TLC279CDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC279CDR is usually 5 days.
3.What payment methods are accepted for TLC279CDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC279CDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC279CDR?
TLC279CDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC279CDR 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 TLC279CDR?
For technical support, including TLC279CDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC279CDR requirements.
6.How does Aetrix verify that TLC279CDR is sourced from the original manufacturer or authorized distributors?
All TLC279CDR 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 TLC279CDR meets industry standards.
7.What is the process for return or replacement of TLC279CDR?
All TLC279CDR units undergo pre-shipment inspection (PSI). If there is an issue with TLC279CDR, 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 TLC279CDR part is unused and in its original packaging.
Return procedure for TLC279CDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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