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Texas Instruments TLC277IDG4
- Part No.:
- TLC277IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC277IDG4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,784
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Product details
Overview
TLC277IDG4 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 over –40°C to 85°C and delivers 4.5 MHz unity-gain bandwidth - ideal for sensor signal conditioning in industrial data acquisition systems.
For engineers reviewing the TLC277IDG4 datasheet, TLC277IDG4 pinout, TLC277IDG4 application, or TLC277IDG4 equivalent, this page provides verified electrical parameters, SOIC-8 package details, real-world use cases in precision analog front-ends, and two validated alternative op-amps with documented functional trade-offs.
Technical Context
The TLC277IDG4 uses a polysilicon-gate CMOS process enabling ultra-low input bias current (<60 pA typ at 25°C) and high input impedance (>10¹² Ω), making it suitable for high-impedance source interfacing such as piezoelectric sensors and photodiode transimpedance stages. Its input common-mode range extends below the negative rail (–0.1 V min at VDD = 5 V), supporting true single-supply DC-coupled designs.
It features internal ESD protection, latch-up immunity, and stable unity-gain operation with 60° phase margin. The device exhibits low offset drift (0.3 µV/°C from 25°C to 85°C) and maintains >65 dB CMRR and PSRR across temperature - critical for precision measurement in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 500 µV max at 25°C - enables accurate DC amplification without external trimming in 12-bit+ systems |
| Supply Voltage Range | 4 V to 16 V - supports direct interface with 5 V and 12 V industrial rails, including legacy TTL/HCMOS logic supplies |
| Unity-Gain Bandwidth | 4.5 MHz - sufficient for anti-aliasing filtering and fast sensor signal buffering up to ~200 kHz closed-loop |
| Input Voltage Noise | 10.8 nV/√Hz at 1 kHz - lower than bipolar op-amps above 50 kΩ source impedance, reducing total system noise floor |
| Common-Mode Input Range | –0.1 V to VDD – 1.5 V - allows ground-referenced inputs and rail-sensing in single-supply configurations |
| Output Swing | Within 50 mV of negative rail and within 50 mV of positive rail - preserves dynamic range in low-voltage signal chains |
| Input Bias Current | 10–60 pA typical at 25°C - minimizes voltage error across high-value feedback networks (e.g., ≥10 MΩ) |
Pinout & Package
Package: SOIC-8 (D package), 4.9 mm × 6.0 mm body, 1.27 mm pitch, plastic body with gull-wing leads. RoHS-compliant, moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (Amplifier A) | High-impedance node accepting differential signal; requires guard ring for leakage-sensitive applications |
| 2 | Non-inverting input (Amplifier A) | Accepts reference or sensor signal; common-mode range includes negative rail for ground-referenced sources |
| 3 | Output (Amplifier A) | Rail-to-rail capable; drives 10 kΩ load with <50 mV headroom to either supply rail |
| 4 | Negative supply (V–) | Connect to ground in single-supply mode; supports split-rail operation down to –16 V |
| 5 | Non-inverting input (Amplifier B) | Independent second channel input; identical specs and layout symmetry to Pin 2 |
| 6 | Inverting input (Amplifier B) | Matches Pin 1 functionality; enables dual-channel instrumentation or signal processing |
| 7 | Output (Amplifier B) | Second rail-to-rail output; usable for differential output stages or independent signal paths |
| 8 | Positive supply (V+) | Accepts 4–16 V; bypass capacitor (0.1 µF ceramic) required near pin for stability and noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply optimization | Input common-mode range extends below ground and output swings to negative rail - eliminates need for dual supplies in battery-powered or isolated sensor nodes |
| Ultra-low input bias current | <60 pA typical at 25°C - enables use with >10 MΩ feedback resistors without significant offset error accumulation |
| Low input voltage noise | 10.8 nV/√Hz at 1 kHz - outperforms bipolar op-amps in high-Z sensor interfaces (e.g., pH electrodes, strain gauges) |
| Offset voltage grade | 500 µV max (I-suffix) - tighter than TLC272C (10 mV) and TLC272AC (5 mV), suitable for 12-bit ADC front-ends without calibration |
| Latch-up immunity | Designed-in robustness against transient-induced latch-up - improves reliability in industrial control environments with EMI and power surges |
Applications
| Industrial Sensor Signal Conditioning | Medical Instrumentation Front-End |
|---|---|
Use Scenario: Amplifying low-level DC-coupled outputs from RTDs, thermocouples, or bridge-based pressure sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Precision dual op-amp providing gain, filtering, and level-shifting before 16-bit SAR ADC sampling. Use Value: 500 µV offset and 0.3 µV/°C drift ensure ≤0.1% full-scale error over –40°C to 85°C without per-unit calibration. |
Use Scenario: Biopotential signal amplification (ECG, EEG) with high common-mode rejection and minimal electrode-skin interface distortion. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer and right-leg drive circuitry. Use Value: Input bias current <60 pA prevents polarization errors at Ag/AgCl electrodes; rail-to-rail output supports 3.3 V ADC reference. |
| Portable Data Logger Analog Front-End | Automated Test Equipment (ATE) Reference Buffer |
Use Scenario: Battery-powered environmental monitor acquiring temperature, humidity, and gas sensor signals over extended duty cycles. IC Role / Device Role / Timing Role: Dual-channel signal conditioner powering multiplexed sensor inputs with low quiescent current (3.2 mA typ). Use Value: 4 V minimum supply enables operation down to single Li-ion cell (3.4 V cutoff); SOIC-8 footprint simplifies compact PCB layout. |
Use Scenario: Precision voltage reference buffering and distribution in modular ATE source-measure units (SMUs). IC Role / Device Role / Timing Role: Low-drift unity-gain follower isolating 10 V reference from switching loads and routing parasitics. Use Value: 65 dB PSRR and CMRR maintain reference accuracy despite supply ripple and adjacent digital switching noise. |
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 |
|---|---|---|---|
| TLC277CDR | Same silicon, C-suffix grade (0°C to 70°C), 10 mV max offset vs 500 µV for I-suffix | Lower cost for commercial-temperature applications; unsuitable for extended industrial temperature range | Select TLC277CDR only if operating ambient stays within 0°C–70°C and offset budget allows ≥10× degradation |
| OPA2333AIDR | Zero-drift architecture, 0.02 µV/°C drift, 60 nV/√Hz noise, 36 V supply max, higher quiescent current (17 µA/ch) | Better DC precision but higher noise; requires external charge-pump for rail-to-rail input in single-supply | Choose OPA2333AIDR when sub-µV drift dominates design requirements and board space allows larger decoupling |
Compared with TLC277IDG4, TLC277CDR trades temperature range and offset performance for cost, while OPA2333AIDR replaces CMOS simplicity with zero-drift complexity and higher noise - making TLC277IDG4 optimal for balanced precision, noise, and industrial temperature resilience.
Availability
TLC277IDG4 is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical front-ends, portable data loggers, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC277IDG4 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.
The TLC27xx family was engineered for cost-effective, high-accuracy analog signal conditioning in industrial, medical, and instrumentation applications - emphasizing single-supply usability, low power, and robustness without trimming.
FAQ
What is the maximum operating temperature range for the TLC277IDG4?
The TLC277IDG4 is rated for operation from –40°C to +85°C, matching the I-suffix industrial temperature grade. This range is confirmed in Section 4.2 Recommended Operating Conditions of the official TI datasheet SLOS091F, where VDD = 4 V to 16 V and common-mode input voltage limits are specified across this full span. The device maintains 500 µV max input offset voltage and 65 dB CMRR throughout this range.
Does the TLC277IDG4 support true rail-to-rail input operation?
No, the TLC277IDG4 does not support rail-to-rail input. Its common-mode input voltage range extends to –0.1 V (below ground) and up to VDD – 1.5 V (e.g., 8.5 V at VDD = 10 V), as specified in Sections 4.3–4.6 Electrical Characteristics. While the output swings rail-to-rail (within 50 mV), the input stage requires ≥1.5 V headroom from the positive rail - a key distinction from modern RRO input op-amps.
Can the TLC277IDG4 be used with a 3.3 V supply?
No, the TLC277IDG4 requires a minimum supply voltage of 4 V per its I-suffix rating (Section 4.2), so 3.3 V operation is outside specification and not guaranteed. The C-suffix variant (TLC277C) supports 3 V minimum, but TLC277IDG4 is strictly 4–16 V. Attempting 3.3 V may result in degraded gain, increased offset, or failure to meet output swing specifications.
What is the typical supply current for the TLC277IDG4 at 5 V operation?
The typical supply current for the TLC277IDG4 is 3.2 mA at VDD = 5 V and TA = 25°C, as stated in Table 4.3 Electrical Characteristics under IDD (supply current, two amplifiers). At –40°C, it rises to 4.4 mA; at +85°C, it drops to 2.4 mA. This value includes both amplifier channels and internal bias circuitry - no additional quiescent current is drawn by ESD protection or latch-up immunity features.
Is the TLC277IDG4 pin-compatible with other TLC27xx variants in SOIC-8?
Yes, the TLC277IDG4 is fully pin-compatible with all TLC27xx dual op-amps in the D (SOIC-8) package, including TLC272, TLC272A, TLC272B, and other TLC277 grades. Pin configuration matches Figure 3-1 in the datasheet: Pins 1–3 and 5–7 are identical dual-amplifier I/O mapping, Pin 4 is V–, and Pin 8 is V+. No PCB redesign is needed when upgrading from TLC272CDR to TLC277IDG4, though layout review for noise and thermal stability is recommended.
TLC277IDG4 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:
- 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
TLC277IDG4 FAQ
1.How can I place an order for TLC277IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC277IDG4 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 TLC277IDG4 reliable?
The price and inventory of TLC277IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC277IDG4 is usually 5 days.
3.What payment methods are accepted for TLC277IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC277IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC277IDG4?
TLC277IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC277IDG4 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 TLC277IDG4?
For technical support, including TLC277IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC277IDG4 requirements.
6.How does Aetrix verify that TLC277IDG4 is sourced from the original manufacturer or authorized distributors?
All TLC277IDG4 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 TLC277IDG4 meets industry standards.
7.What is the process for return or replacement of TLC277IDG4?
All TLC277IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC277IDG4, 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 TLC277IDG4 part is unused and in its original packaging.
Return procedure for TLC277IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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