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Texas Instruments TLC277IDR
- Part No.:
- TLC277IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC277IDR.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,803
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Product details
Overview
TLC277IDR 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 4 V to 16 V across –40°C to 85°C and delivers 4.5 MHz unity-gain bandwidth - enabling high-fidelity signal conditioning in battery-powered instrumentation and sensor front-ends.
For engineers reviewing the TLC277IDR datasheet, TLC277IDR pinout, TLC277IDR application, or TLC277IDR equivalent, key selection criteria include its low input bias current (<60 pA), wide common-mode input range extending below ground, and guaranteed performance over industrial temperature range without requiring split supplies.
Technical Context
The TLC277IDR 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 such as 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 with ground-referenced inputs.
It integrates ESD protection circuitry and latch-up immunity, and its output drives ±30 mA while maintaining low-level output voltage ≤50 mV (IOL = 0). The device exhibits 65–85 dB CMRR and 65–120 dB PSRR across frequency, supporting stable closed-loop gain 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 in precision measurement paths without trimming. |
| Input bias current | <60 pA typical at 25°C - preserves signal integrity when interfacing with MΩ-range sensor impedances. |
| Unity-gain bandwidth | 4.5 MHz - supports stable amplification of audio-band and low-speed control signals up to ~100 kHz closed-loop. |
| Slew rate | 0.5 V/µs (small-signal), 21 V/µs (large-signal) - accommodates fast transients while limiting distortion in buffered references. |
| Supply voltage range | 4 V to 16 V (–40°C to 85°C) - compatible with 5 V and 12 V industrial rails, and tolerant of brownout conditions. |
| Common-mode input range | –0.1 V to VDD – 1.5 V - allows direct sensing of ground-referenced signals without level-shifting circuitry. |
| Output voltage swing | Within 50 mV of negative rail and within 50 mV of positive rail (RL = 10 kΩ) - maximizes dynamic range in single-supply systems. |
Pinout & Package
Package: SOIC-8 (D package), 4.9 mm × 6.0 mm body, 1.27 mm pitch, gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (Amplifier A) | High-impedance node accepting differential signal; requires guard ring layout for leakage-sensitive applications. |
| 2 | Non-inverting input (Amplifier A) | Accepts reference or sensor signal; common-mode range extends below ground for single-supply biasing. |
| 3 | Output (Amplifier A) | Capable of sourcing/sinking ±30 mA; output swing includes negative rail for full-scale analog interfacing. |
| 4 | Ground (V–) | Power return path; must be low-impedance and decoupled near device to maintain PSRR and stability. |
| 5 | Non-inverting input (Amplifier B) | Independent input channel; identical electrical specs to Pin 2 - supports dual-channel signal processing. |
| 6 | Inverting input (Amplifier B) | Matches Pin 1 performance; layout symmetry recommended to minimize inter-channel crosstalk. |
| 7 | Output (Amplifier B) | Electrically isolated from Pin 3; usable for independent gain stages or feedback paths in multi-stage filters. |
| 8 | Supply (V+) | Accepts 4–16 V; requires 0.1 µF ceramic bypass capacitor placed within 5 mm of pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply optimized architecture | Enables ground-referenced input and rail-to-rail output without level shifters or dual supplies - reduces BOM count and PCB area. |
| Low input voltage noise | 10.8 nV/√Hz at 1 kHz - critical for amplifying microvolt-level sensor outputs (e.g., thermocouples, strain gauges) without adding noise floor. |
| Ultra-low input bias current | <60 pA typical - prevents signal attenuation and DC error in high-Z networks (e.g., pH probes, photodiode transimpedance stages). |
| Latch-up immunity | Guaranteed per JEDEC JESD78 - ensures robustness against transient overvoltage and supply sequencing faults in embedded systems. |
| ESD protection | Integrated circuitry rated to >2 kV HBM - eliminates need for external TVS diodes in moderate-environment industrial designs. |
Applications
| Medical Instrumentation | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Amplifying low-amplitude bio-potential signals (ECG, EEG) from dry electrodes with minimal power consumption. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier in first-stage analog front-end, providing gain and buffering before ADC sampling. Use Value: 500 µV max VIO and <60 pA IIB prevent baseline drift and electrode polarization errors, enabling sub-µV resolution. |
Use Scenario: Conditioning output from resistive temperature detectors (RTDs) and load cells in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Low-drift instrumentation amplifier driver and reference buffer in ratiometric measurement circuits. Use Value: Rail-to-rail output and wide supply range (4–16 V) allow direct interface with 5 V or 12 V PLC backplanes without additional regulators. |
| Portable Test Equipment | Automotive Body Control Modules |
Use Scenario: Signal amplification in handheld multimeters and portable oscilloscope front-ends powered by Li-ion batteries (3.3–4.2 V nominal). IC Role / Device Role / Timing Role: Dual-channel amplifier for AC/DC coupling selection and autoranging gain stages. Use Value: 4 V min supply enables operation down to battery end-of-life; low noise preserves measurement accuracy across ranges. |
Use Scenario: Monitoring 12 V vehicle bus voltage and cabin temperature sensor outputs in BCMs with extended temperature requirements. IC Role / Device Role / Timing Role: Voltage supervisor comparator input buffer and NTC thermistor signal conditioner. Use Value: Guaranteed operation from –40°C to 85°C and 16 V max supply rating support automotive under-hood and interior environments. |
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 |
|---|---|---|---|
| TLV2772IDR | Lower supply voltage (2.7 V min), higher quiescent current (1.25 mA vs 3.2 mA), 2.5 MHz GBW - optimized for ultra-low-voltage battery use. | Better suited for 3.3 V systems with tighter power budgets; less suitable for 12 V industrial rails due to lower VDD max (6 V). | Select TLV2772IDR only when operating below 4 V or requiring lower supply headroom; TLC277IDR remains preferred for 5–16 V industrial designs. |
| OPA2333AIDR | Zero-drift architecture, 0.02 µV/°C offset drift, 60 µV max VIO, but higher cost and 17 µA IIB - superior DC stability at expense of noise (5.5 nV/√Hz). | Ideal for long-term drift-critical applications (e.g., calibration equipment); not required for moderate-accuracy sensor interfaces where TLC277IDR's 0.3 µV/°C drift suffices. | Choose OPA2333AIDR only when sub-µV/°C drift is mandatory; TLC277IDR offers optimal balance of precision, noise, and cost for general-purpose industrial use. |
Compared with TLV2772IDR and OPA2333AIDR, the TLC277IDR provides the widest supply range (4–16 V), lowest input voltage noise (10.8 nV/√Hz), and best cost-performance ratio for industrial and instrumentation applications requiring stable precision without zero-drift complexity.
Availability
TLC277IDR is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal conditioning, portable test equipment, and automotive body control modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for TLC277IDR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TLC27xx family was designed as cost-effective, high-input-impedance precision op-amps targeting sensor interfaces, portable instrumentation, and industrial control systems where BiFET performance was needed without the cost or power penalty.
FAQ
What is the maximum supply voltage rating for the TLC277IDR?
The TLC277IDR has an absolute maximum supply voltage of 18 V, with recommended operation from 4 V to 16 V across the full –40°C to 85°C industrial temperature range. Exceeding 16 V may compromise long-term reliability and is not supported in the electrical characteristics tables.
Does the TLC277IDR support true single-supply operation with ground-referenced inputs?
Yes, the TLC277IDR supports true single-supply operation: its common-mode input voltage range extends to –0.1 V (at VDD = 5 V) and its output swings to within 50 mV of the negative rail. This allows direct connection of ground-referenced sensors without level-shifting circuitry.
What is the typical input bias current of the TLC277IDR at 85°C?
The typical input bias current of the TLC277IDR is 200 pA at 85°C, with a maximum of 2000 pA across the full temperature range. This ultra-low value preserves accuracy in high-impedance sensor interfaces such as pH electrodes and piezoelectric transducers.
Can unused amplifier sections in the TLC277IDR be left floating?
No - unused amplifier sections in the TLC277IDR must be configured as grounded unity-gain followers (non-inverting input tied to ground, output connected to inverting input) to prevent oscillation and ensure stable quiescent current draw.
Is the TLC277IDR pin-compatible with other devices in the TLC27xx family?
Yes, the TLC277IDR shares identical SOIC-8 (D package) pinout and footprint with TLC272IDR, TLC272AIDR, and TLC272BIDR - enabling drop-in replacement for different offset voltage grades (10 mV, 5 mV, 2 mV, and 500 µV) without PCB changes.
TLC277IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 900 µV
- Current - Supply:
- 1.4mA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLC277IDR FAQ
1.How can I place an order for TLC277IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC277IDR 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 TLC277IDR reliable?
The price and inventory of TLC277IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC277IDR is usually 5 days.
3.What payment methods are accepted for TLC277IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC277IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC277IDR?
TLC277IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC277IDR 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 TLC277IDR?
For technical support, including TLC277IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC277IDR requirements.
6.How does Aetrix verify that TLC277IDR is sourced from the original manufacturer or authorized distributors?
All TLC277IDR 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 TLC277IDR meets industry standards.
7.What is the process for return or replacement of TLC277IDR?
All TLC277IDR units undergo pre-shipment inspection (PSI). If there is an issue with TLC277IDR, 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 TLC277IDR part is unused and in its original packaging.
Return procedure for TLC277IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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