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Texas Instruments TLC277CDG4
- Part No.:
- TLC277CDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC277CDG4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,668
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Product details
Overview
TLC277CDG4 from Texas Instruments is a precision dual CMOS operational amplifier optimized for single-supply operation, featuring 500 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 4.5 MHz unity-gain bandwidth with 0.5 V/µs slew rate - enabling high-fidelity signal conditioning in battery-powered sensor front-ends and portable instrumentation.
For engineers reviewing the TLC277CDG4 datasheet, TLC277CDG4 pinout, TLC277CDG4 application, or TLC277CDG4 equivalent, key selection criteria include its low-input-bias-current design (<60 pA typical), wide common-mode input range extending below ground, and compatibility with TTL/HCMOS supply rails - critical when upgrading legacy bipolar op-amp circuits or designing low-power analog interfaces.
Technical Context
The TLC277CDG4 uses a polysilicon-gate CMOS process to achieve ultra-high input impedance (>10¹² Ω) and low input bias current, minimizing loading on high-impedance sources like piezoelectric sensors and pH electrodes. Its input stage supports common-mode voltages down to –0.1 V (at VDD = 5 V), enabling true single-supply operation without level-shifting circuitry.
It integrates ESD protection and latch-up immunity, and its offset voltage drift is specified at 0.3 µV/°C (25°C to 70°C). The device exhibits 65–80 dB common-mode rejection and 65–120 dB supply-voltage rejection across temperature, ensuring stable performance in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 500 µV max at 25°C - enables accurate DC-coupled amplification of mV-level sensor signals without nulling circuitry |
| Input Voltage Noise | 10.8 nV/√Hz at 1 kHz - supports low-noise amplification of weak signals from photodiodes or strain gauges |
| Unity-Gain Bandwidth | 4.5 MHz - sufficient for anti-aliasing filters, active RC filters, and medium-speed data acquisition |
| Slew Rate | 0.5 V/µs - limits large-signal transient response but ensures stability with capacitive loads up to 20 pF |
| Supply Voltage Range | 3 V to 16 V - compatible with single-cell Li-ion (3.3 V), 5 V logic rails, and 12 V industrial supplies |
| Common-Mode Input Range | Extends to –0.1 V below negative rail (at VDD = 5 V) - allows direct interfacing to grounded transducers |
| Output Voltage Swing | Includes negative rail (0 V) - simplifies single-supply signal chain design by eliminating negative bias requirements |
Pinout & Package
TL277CDG4 is housed in an 8-pin SOIC (D package), measuring 4.9 mm × 6.0 mm, with standard JEDEC MS-012AC footprint and gull-wing leads. This surface-mount package supports automated assembly and provides thermal resistance (θJA) of 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node accepting differential input; requires guard ring routing to suppress PCB leakage currents |
| 2 | Non-Inverting Input (Amplifier A) | Accepts reference or sensor signal; common-mode range extends below ground for true single-supply use |
| 3 | Output (Amplifier A) | Rail-to-rail capable output driving 10 kΩ load; limited sourcing/sinking to ±30 mA per channel |
| 4 | Negative Supply (GND) | Reference return for both amplifiers; serves as signal ground in single-supply configurations |
| 5 | Non-Inverting Input (Amplifier B) | Independent second channel input; identical electrical specs to Pin 2 |
| 6 | Inverting Input (Amplifier B) | Second channel differential input; shares same high-Z, low-bias-current characteristics as Pin 1 |
| 7 | Output (Amplifier B) | Second independent output; usable for dual-channel filtering, differential drive, or redundancy |
| 8 | Positive Supply (VDD) | Single positive rail input (3–16 V); decoupling capacitor required within 1 cm for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | <60 pA typical at 25°C - preserves signal integrity in high-impedance pH, ion-selective, or piezo sensor interfaces |
| Single-supply optimized input stage | Common-mode range includes GND (–0.1 V min) - eliminates need for external level shifters in 0–5 V systems |
| Rail-to-rail output swing | Drives to 0 V (negative rail) with 10 kΩ load - maximizes dynamic range in 3.3 V or 5 V microcontroller ADC front-ends |
| Low 1/f noise corner | Typical 10.8 nV/√Hz at 1 kHz - outperforms bipolar op-amps above 50 kΩ source impedances |
| ESD-protected inputs | Integrated circuitry withstands ≥2 kV HBM - reduces need for external TVS diodes in board-level ESD zones |
Applications
| Medical Sensor Signal Conditioning | Industrial Temperature Monitoring |
|---|---|
|
Use Scenario: Amplifying low-amplitude mV outputs from thermocouples and RTDs in portable patient monitors. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with offset trimming capability and low drift over operating temperature. Use Value: 500 µV max VIO and 0.3 µV/°C drift ensure <±0.5°C accuracy over 0–70°C without calibration. |
Use Scenario: Signal conditioning for 4–20 mA loop-powered temperature transmitters in factory automation. IC Role / Device Role / Timing Role: Dual-channel buffer and I/V conversion amplifier supporting isolated analog output stages. Use Value: Dual configuration enables simultaneous sensor buffering and reference generation using one IC. |
| Portable Battery-Powered Instrumentation | Automotive Cabin Air Quality Sensing |
|
Use Scenario: Front-end amplification for CO₂ and VOC sensors in handheld air quality analyzers. IC Role / Device Role / Timing Role: Low-power, low-noise preamplifier operating from single 3.3 V Li-ion cell. Use Value: 3 V minimum supply and 1.12 mA typical IDD enable >100-hour runtime on 500 mAh battery. |
Use Scenario: Signal conditioning for NDIR-based CO₂ sensors in automotive HVAC control modules. IC Role / Device Role / Timing Role: High-impedance buffer for detector photodiode current-to-voltage conversion. Use Value: Input impedance >10¹² Ω prevents loading of high-Z photodiode junctions, preserving SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision dual op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift architecture; 0.1 µV/°C max drift vs. TLC277CDG4's 0.3 µV/°C; higher quiescent current (17 µA vs. 1.12 mA) | Better for sub-µV DC stability over temperature; less suitable for high-output-drive or fast-settling applications | Select OPA2333AIDR when long-term DC accuracy dominates; retain TLC277CDG4 for cost-sensitive, moderate-precision, higher-output-current needs |
| LMV722MMX/NOPB | Rail-to-rail input/output; lower supply range (2.7–5.5 V); higher input bias current (1 pA typical vs. 60 pA) | Optimized for 3.3 V only; lacks extended 16 V operation and true ground-sensing input capability | Choose LMV722MMX/NOPB for compact 3.3 V designs where size and ultra-low power matter more than wide supply flexibility |
Compared with OPA2333AIDR and LMV722MMX/NOPB, the TLC277CDG4 uniquely balances wide supply range (3–16 V), ground-sensing input, and cost-effective precision - making it optimal for industrial and portable equipment where robustness and design reuse across voltage domains are priorities.
Availability
TLC277CDG4 is available at Aetrix Electronics and suitable for medical sensor signal conditioning, industrial temperature monitoring, portable battery-powered instrumentation, and automotive cabin air quality sensing requiring stable component supply across extended production lifecycles.
Supply support for TLC277CDG4 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 heritage in precision op-amp design and manufacturing excellence.
The TLC27xx family was developed to provide cost-effective, high-input-impedance precision amplification for sensor interfaces and industrial signal chains - bridging performance gaps between legacy bipolar and modern zero-drift op-amps.
FAQ
What is the maximum supply voltage rating for the TLC277CDG4?
The absolute maximum supply voltage for the TLC277CDG4 is 18 V, but the recommended operating range is 3 V to 16 V across 0°C to 70°C. Exceeding 16 V risks exceeding internal power dissipation limits and may degrade long-term reliability. The TLC277CDG4 must not be operated above 18 V under any condition, as permanent damage can occur.
Does the TLC277CDG4 support true rail-to-rail input operation?
No - the TLC277CDG4 supports rail-to-rail *output* swing (down to GND), but its input common-mode range extends only to –0.1 V below the negative rail (GND) and up to VDD – 1 V at 25°C. It does not accept inputs at the positive rail. This makes it ground-sensing but not full rail-to-rail input, distinguishing it from newer CMOS op-amps like the OPAx320 series.
Can unused amplifier channels in the TLC277CDG4 be left floating?
No - unused amplifier channels in the TLC277CDG4 must be configured as unity-gain buffers with inputs tied to a valid common-mode voltage (e.g., mid-supply via resistor divider or directly to GND if within spec). Leaving inputs unconnected risks oscillation, increased supply current, or erratic output behavior due to internal node instability.
What is the typical input bias current of the TLC277CDG4 at 85°C?
The typical input bias current of the TLC277CDG4 rises to 220 pA at 85°C, based on electrical characteristics tables for I-suffix variants (TLC277I). While the C-suffix TLC277CDG4 is rated for 0°C to 70°C operation, its bias current at 70°C reaches 600 pA maximum - a key derating factor when designing high-impedance sensor interfaces near upper temperature limits.
Is the TLC277CDG4 pin-compatible with other TLC27xx variants like TLC272CDG4?
Yes - the TLC277CDG4 shares identical SOIC-8 pinout and footprint with TLC272CDG4, TLC272ACDG4, and TLC272BDG4. All devices in the TLC27xx family use the same D-package pin configuration, enabling drop-in replacement for offset voltage grade upgrades - though system-level validation of noise, bandwidth, and drift performance is still required.
TLC277CDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 5.3V/µs
- Gain Bandwidth Product:
- 2.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.7 pA
- Voltage - Input Offset:
- 1.1 mV
- Current - Supply:
- 1.9mA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLC277CDG4 FAQ
1.How can I place an order for TLC277CDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC277CDG4 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 TLC277CDG4 reliable?
The price and inventory of TLC277CDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC277CDG4 is usually 5 days.
3.What payment methods are accepted for TLC277CDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC277CDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC277CDG4?
TLC277CDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC277CDG4 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 TLC277CDG4?
For technical support, including TLC277CDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC277CDG4 requirements.
6.How does Aetrix verify that TLC277CDG4 is sourced from the original manufacturer or authorized distributors?
All TLC277CDG4 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 TLC277CDG4 meets industry standards.
7.What is the process for return or replacement of TLC277CDG4?
All TLC277CDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC277CDG4, 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 TLC277CDG4 part is unused and in its original packaging.
Return procedure for TLC277CDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC277CDG4 Tags
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