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Texas Instruments TLC277CPSR
- Part No.:
- TLC277CPSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
TLC277CPSR.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,571
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Product details
Overview
TLC277CPSR 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–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 interfaces and portable instrumentation.
For engineers reviewing the TLC277CPSR datasheet, TLC277CPSR pinout, TLC277CPSR application, or TLC277CPSR equivalent, key selection criteria include its low input bias current (<60 pA), wide common-mode input range extending below ground, high CMRR (65–80 dB), and compatibility with 8-pin SOP packaging for space-constrained PCB layouts.
Technical Context
The TLC277CPSR 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 or 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.
Internally, it integrates ESD protection and latch-up immunity, with two independent amplifiers sharing only the supply rails. The device exhibits stable phase margin (60°) and 10 kHz maximum output-swing bandwidth under 10 kΩ//20 pF load, confirming suitability for closed-loop configurations including active filters and precision transimpedance stages.
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 outputs without nulling circuitry |
| Input Bias Current | 60 pA max at 25°C - preserves signal integrity when interfacing with >1 MΩ source impedances (e.g., photodiode, thermocouple) |
| Supply Voltage Range | 3 V to 16 V - supports direct connection to 3.3 V, 5 V, and 12 V rails without regulators |
| Unity-Gain Bandwidth | 4.5 MHz - sufficient for anti-aliasing filtering up to ~200 kHz with 20 dB gain margin |
| Slew Rate | 0.5 V/µs - limits full-power bandwidth to ~80 kHz but ensures stability with capacitive loads ≤20 pF |
| CMRR | 65–80 dB - rejects power supply ripple and shared-noise coupling in mixed-signal systems |
| Output Voltage Swing | Within 50 mV of negative rail - allows ground-referenced output in single-supply systems without negative bias |
Pinout & Package
Package: SOP-8 (PS), 6.2 mm × 7.8 mm body size with standard 1.27 mm pitch; RoHS-compliant, surface-mountable, tape-and-reel compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | Accepts differential input signal; high-impedance node requiring guard ring layout for leakage control |
| 2 | Non-Inverting Input (Amplifier A) | Reference or sensor input node; common-mode range extends below GND for true single-supply use |
| 3 | Output (Amplifier A) | Rail-to-rail capable output; sinks/source up to ±30 mA; requires local 0.1 µF bypass capacitor |
| 4 | Negative Supply (GND) | Ground reference for both amplifiers; must be low-impedance with dedicated plane or trace |
| 5 | Non-Inverting Input (Amplifier B) | Independent second channel input; identical specs to Pin 2; usable for dual-channel sensing |
| 6 | Inverting Input (Amplifier B) | Second differential input; polarity inverted relative to Pin 5; matched offset and bias performance |
| 7 | Output (Amplifier B) | Second independent output; electrically isolated from Pin 3 except via shared supply rails |
| 8 | Positive Supply (VDD) | Single 3–16 V supply input; requires 10 µF bulk + 0.1 µF ceramic decoupling at package pin |
Key Features
| Feature | Design Value |
|---|---|
| Low Input Offset Drift | 0.3 µV/°C (25°C to 70°C) - maintains calibration stability across industrial temperature ranges without recalibration |
| ESD Protection | Integrated circuit-level ESD structures - withstands ≥2 kV HBM per JESD22-A114, reducing need for external TVS diodes |
| Latch-Up Immunity | Designed-in immunity per JESD78 - prevents destructive latch-up during overvoltage transients or supply sequencing faults |
| Single-Supply Optimization | Input common-mode range includes GND and output swings to GND - eliminates need for dual supplies or charge pumps in portable designs |
| High Input Impedance | >10¹² Ω typical - avoids signal attenuation in high-Z sensor front-ends (e.g., electret mics, strain gauges) |
Applications
| Medical Sensor Signal Conditioning | Portable Data Acquisition Front-End |
|---|---|
Use Scenario: Amplifying low-amplitude bio-potential signals (ECG, EEG) from dry electrodes with minimal power consumption. IC Role / Device Role / Timing Role: Dual-channel DC-coupled instrumentation amplifier stage with matched offset and drift between channels. Use Value: 500 µV max VIO and 60 pA IIB preserve microvolt-level signal fidelity; rail-to-rail output drives 12-bit SAR ADC reference directly from 3.3 V supply. |
Use Scenario: Signal conditioning for multi-channel environmental sensors (temperature, humidity, gas) in handheld analyzers. IC Role / Device Role / Timing Role: Precision buffer and gain stage preceding multiplexed ADC, operating from single Li-ion cell (3.0–4.2 V). Use Value: 3 V minimum supply enables operation across full battery discharge curve; low noise (10.8 nV/√Hz) maintains SNR >85 dB for 16-bit conversion. |
| Industrial Process Monitoring | Automotive Cabin Air Quality Module |
Use Scenario: Converting 4–20 mA loop signals to 0–3.3 V for PLC analog inputs in factory automation systems. IC Role / Device Role / Timing Role: Low-drift current-to-voltage converter with integrated reference buffering and filtering. Use Value: 0.3 µV/°C drift ensures <±0.1% FS error over –25°C to +70°C ambient; high CMRR rejects 50/60 Hz line interference. |
Use Scenario: Signal amplification for NDIR CO₂ and VOC sensors in automotive HVAC control units. IC Role / Device Role / Timing Role: Low-power, high-accuracy transimpedance amplifier for photodiode current outputs. Use Value: Sub-60 pA IIB minimizes dark-current error; 16 V max supply accommodates automotive load-dump transients up to 14.5 V nominal. |
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 VIO (350 µV max), higher quiescent current (1.25 mA vs 3.2 mA), same SOP-8 package | Better DC accuracy but higher power draw - suitable for battery-limited apps where offset dominates error budget | Select TLV2772IDR when sub-400 µV offset is required and supply current <1.3 mA is acceptable |
| OPA2333AIDR | Zero-drift architecture (0.02 µV/°C drift), lower noise (5.5 nV/√Hz), higher cost, same pinout | Superior long-term stability and low-frequency noise - ideal for precision weigh scales or medical diagnostics | Choose OPA2333AIDR for applications demanding <0.1 µV/°C drift and <10 ppm/°C gain stability over time |
Compared with TLV2772IDR and OPA2333AIDR, the TLC277CPSR offers the best balance of low offset, ultra-low bias current, and wide supply range in a cost-effective SOP-8 package - making it optimal for general-purpose precision analog front-ends where moderate drift and noise are acceptable.
Availability
TLC277CPSR is available at Aetrix Electronics and suitable for medical sensor signal conditioning, portable data acquisition front-ends, and industrial process monitoring requiring stable component supply across extended production lifecycles.
Supply support for TLC277CPSR 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 TLC277CPSR belongs to TI's TLC27xx precision dual op-amp family, designed specifically for single-supply, low-power, high-input-impedance applications in portable instrumentation, sensor interfaces, and industrial control systems.
FAQ
What is the maximum operating temperature range for the TLC277CPSR?
The TLC277CPSR is rated for 0°C to 70°C ambient operation (C-suffix grade). Its recommended supply voltage range is 3 V to 16 V within this temperature span. Absolute maximum junction temperature is 150°C, but sustained operation above 70°C requires thermal derating and is not guaranteed per specification. Always consult the latest TI datasheet revision for updated thermal limits.
Does the TLC277CPSR support rail-to-rail input operation?
The TLC277CPSR does not support full rail-to-rail input - its common-mode input voltage range extends to –0.1 V (below GND) and up to VDD – 1 V at 25°C, per datasheet Section 4.2. This allows ground-referenced inputs in single-supply systems but excludes direct connection to VDD at the input pins without external attenuation or clamping.
Can the TLC277CPSR drive capacitive loads reliably?
The TLC277CPSR is characterized for stable operation with ≤20 pF capacitive load (Section 4.7), delivering 60° phase margin. Driving larger capacitive loads (e.g., >50 pF) may cause peaking or oscillation; TI recommends adding a series isolation resistor (10–100 Ω) between output and load if capacitance exceeds 20 pF.
How does the input offset voltage of the TLC277CPSR compare to the TLC272CPSR?
The TLC277CPSR has a maximum input offset voltage of 500 µV at 25°C, while the TLC272CPSR is rated at 10 mV max. This 20× improvement makes the TLC277CPSR suitable for applications requiring higher DC precision - such as low-gain sensor amplifiers or precision reference buffers - where the TLC272CPSR would introduce unacceptable static error.
Is the TLC277CPSR pin-compatible with other devices in the TLC27xx family?
Yes - all TLC27xx dual op-amps (including TLC272, TLC272A, TLC272B, and TLC277) share identical SOP-8 (PS) pinouts per Figure 3-1 in the datasheet. This allows drop-in replacement within the same package variant, provided system-level requirements (e.g., offset, drift, bandwidth) are verified for functional equivalence.
TLC277CPSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-SO
TLC277CPSR FAQ
1.How can I place an order for TLC277CPSR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC277CPSR 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 TLC277CPSR reliable?
The price and inventory of TLC277CPSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC277CPSR is usually 5 days.
3.What payment methods are accepted for TLC277CPSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC277CPSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC277CPSR?
TLC277CPSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC277CPSR 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 TLC277CPSR?
For technical support, including TLC277CPSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC277CPSR requirements.
6.How does Aetrix verify that TLC277CPSR is sourced from the original manufacturer or authorized distributors?
All TLC277CPSR 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 TLC277CPSR meets industry standards.
7.What is the process for return or replacement of TLC277CPSR?
All TLC277CPSR units undergo pre-shipment inspection (PSI). If there is an issue with TLC277CPSR, 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 TLC277CPSR part is unused and in its original packaging.
Return procedure for TLC277CPSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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