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Texas Instruments TLC271ACD
- Part No.:
- TLC271ACD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC271ACD.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:325
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Product details
Overview
TLC271ACD from Texas Instruments is a programmable low-power LinCMOS™ operational amplifier with bias-select capability, 5 mV max input offset voltage at 25°C, 3 V to 16 V supply range (0°C to 70°C), and rail-to-rail output swing down to the negative rail. It serves as a precision signal-conditioning amplifier in battery-powered sensor interfaces and portable instrumentation.
For engineers reviewing the TLC271ACD datasheet, TLC271ACD pinout, TLC271ACD application, or TLC271ACD equivalent, this page delivers verified specifications, validated pin functions, confirmed operating modes (high/medium/low bias), real-world application contexts, and two technically documented alternative parts for design flexibility.
Technical Context
The TLC271ACD implements a silicon-gate LinCMOS™ process enabling 10¹² Ω typical input impedance and sub-picoampere input bias current. Its three-mode bias-select architecture-controlled via an external voltage on the BIAS SELECT pin-directly configures power dissipation (50–3375 µW), slew rate (0.03–3.6 V/µs), and unity-gain bandwidth (0.09–1.7 MHz) without changing external components.
It supports single-supply operation with common-mode input voltage extending below ground (–0.2 V at VDD = 5 V), features internal ESD protection rated to 2000 V (MIL-STD-883C), and exhibits latch-up immunity due to designed-in structural isolation. Input offset voltage drift is typically 0.1 µV/month, including first 30 days.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (max) | 5 mV at 25°C - defines worst-case DC error in precision gain stages |
| Supply Voltage Range | 3 V to 16 V at 0°C to 70°C - enables direct use with 3.3 V, 5 V, and 12 V rails |
| Input Impedance (typ) | 10¹² Ω - minimizes loading on high-impedance sources like pH electrodes or piezoelectric sensors |
| Slew Rate (high-bias) | 3.6 V/µs at VDD = 5 V - supports >100 kHz small-signal amplification without distortion |
| Power Dissipation (high-bias) | 3375 µW at VDD = 5 V - balances speed and ultra-low power for portable devices |
| Common-Mode Input Range | Extends to –0.2 V below GND at VDD = 5 V - allows true single-supply transducer interfacing |
| ESD Rating | 2000 V per MIL-STD-883C Method 3015.2 - reduces handling sensitivity in assembly |
Pinout & Package
Package: SOIC-8 (D package), 3.9 mm × 4.9 mm body, 1.27 mm pitch, tape-and-reel compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OFFSET N1) | Offset null input | Connects to external potentiometer wiper for manual input offset trimming |
| 2 (IN–) | Inverting input | Differential input node; accepts signals referenced to system ground or negative rail |
| 3 (IN+) | Non-inverting input | Differential input node; supports common-mode voltages down to –0.2 V (VDD = 5 V) |
| 4 (GND) | Negative supply / reference | Return path for supply and signal; common-mode range extends below this pin |
| 5 (BIAS SELECT) | Bias mode control | Voltage level (GND = low, VDD/2 = medium, VDD = high) sets power/performance tradeoff |
| 6 (VDD) | Positive supply | Accepts 3–16 V; internal regulation ensures stable bias across full voltage range |
| 7 (OUT) | Amplifier output | Rail-to-rail swing: drives to GND and within 0.2 V of VDD under 10 kΩ load |
| 8 (OFFSET N2) | Offset null input | Completes nulling network with Pin 1; required only when trimming offset is needed |
Key Features
| Feature | Design Value |
|---|---|
| Bias-select programming | Three discrete operating modes (low/medium/high) set by single external voltage - eliminates need for multiple op-amp SKUs |
| Rail-to-rail output | Swings to GND and within 200 mV of VDD - maximizes dynamic range in single-supply systems |
| Sub-pA input bias current | 0.6 pA typ at 25°C - preserves signal integrity in photodiode, capacitive, or electrochemical sensor front-ends |
| LinCMOS™ process stability | 0.1 µV/month offset drift (including first 30 days) - reduces calibration frequency in long-life instruments |
| Wide temperature grade | Rated for 0°C to 70°C (C-suffix) - qualified for commercial industrial control and test equipment |
| ESD-hardened inputs | 2000 V HBM rating - withstands handling without functional degradation or parameter shift |
Applications
| Portable Gas Sensor Signal Chain | Low-Power Battery Monitor |
|---|---|
|
Use Scenario: Amplifying microamp-level current from electrochemical gas cells in handheld air quality meters. IC Role / Device Role / Timing Role: Transimpedance amplifier with programmable gain and ultra-low input bias to preserve signal-to-noise ratio. Use Value: 0.6 pA input bias prevents current leakage errors; 5 mV max offset ensures <1% full-scale error at 100 mV output span. |
Use Scenario: Monitoring cell voltage and current in lithium-ion battery packs for wearables and medical devices. IC Role / Device Role / Timing Role: Precision differential amplifier for shunt-based current sensing and rail-referenced voltage scaling. Use Value: Common-mode input range extending below GND enables accurate measurement of negative shunt voltage drops; low 50 µW power in low-bias mode extends runtime. |
| Industrial Temperature Transmitter | Remote Analog I/O Module |
|
Use Scenario: Conditioning output of RTD or thermocouple bridges in DIN-rail mounted field transmitters. IC Role / Device Role / Timing Role: Programmable-gain instrumentation amplifier stage with offset trim capability. Use Value: OFFSET N1/N2 pins enable factory calibration to <10 µV residual offset; 10¹² Ω input impedance avoids bridge imbalance errors. |
Use Scenario: Signal buffering and level-shifting for 4–20 mA loop receivers in distributed control systems. IC Role / Device Role / Timing Role: Unity-gain buffer isolating sensitive ADC inputs from noisy field wiring. Use Value: High CMRR (80 dB min) rejects common-mode noise on long cables; rail-to-rail output drives 12-bit SAR ADCs directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC271CD | 10 mV max input offset voltage (vs. 5 mV for TLC271ACD); otherwise identical pinout, bias modes, and specs | Lower-cost option where ±10 mV DC error is acceptable in non-critical signal paths | Select TLC271CD when budget constraints outweigh precision requirements and offset drift is not critical |
| TLC272ACD | Dual-channel version; same 5 mV offset grade, but shares supply and thermal environment between channels | Reduces board space in multi-channel sensor systems but introduces inter-channel crosstalk risk above 10 kHz | Choose TLC272ACD only when dual amplification is required and channel matching is secondary to integration density |
Compared with TLC271CD and TLC272ACD, the TLC271ACD provides the optimal balance of precision (5 mV offset), programmability (bias-select), and single-channel isolation for cost-sensitive yet accuracy-demanding designs such as portable diagnostics and battery management.
Availability
TLC271ACD is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensor nodes, and industrial analog I/O modules requiring stable component supply across extended production lifecycles.
Supply support for TLC271ACD 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 delivering analog, embedded processing, and connectivity solutions with over 90 years of innovation in precision analog design.
The TLC271 family was engineered to replace bipolar and BiFET op-amps in low-power, high-input-impedance applications-delivering CMOS performance without sacrificing speed or DC accuracy.
FAQ
What is the maximum input offset voltage specification for the TLC271ACD?
The TLC271ACD has a maximum input offset voltage of 5 mV at 25°C, as specified in the "Electrical Characteristics" table for high-bias mode under C-suffix conditions. This value applies across the full 0°C to 70°C operating range, with typical drift of 1.8 µV/°C from 25°C to 70°C. The TLC271ACD maintains this grade consistently across all three bias modes.
How does the BIAS SELECT pin function on the TLC271ACD?
The BIAS SELECT pin on the TLC271ACD determines operating mode: grounding selects low-bias (50 µW, 0.03 V/µs), connecting to VDD/2 selects medium-bias (525 µW, 0.4 V/µs), and tying to VDD selects high-bias (3375 µW, 3.6 V/µs). The TLC271ACD's internal circuitry interprets these voltage levels to reconfigure bias currents without external resistors or configuration registers.
Can the TLC271ACD operate from a single 3.3 V supply?
Yes, the TLC271ACD supports single-supply operation down to 3 V across its rated 0°C to 70°C temperature range. At 3.3 V, it delivers rail-to-rail output swing (to GND and within ~300 mV of VDD), 0.6 pA typical input bias current, and maintains 5 mV max input offset. Performance metrics such as slew rate scale linearly with supply voltage.
Does the TLC271ACD require external offset nulling in most applications?
External offset nulling via Pins 1 and 8 is optional and only required in applications demanding sub-millivolt DC accuracy. The TLC271ACD's 5 mV max offset and 0.1 µV/month drift are sufficient for most portable sensor and battery-monitoring uses. Nulling is recommended only when residual error must be reduced below 10 µV after system-level calibration.
What package type is used for the TLC271ACD and is it RoHS-compliant?
The TLC271ACD is supplied in an 8-pin SOIC (D) package measuring 3.9 mm × 4.9 mm with 1.27 mm lead pitch. It is RoHS-compliant and halogen-free per Texas Instruments' product change notification PCN-120517-001, with lead finish of matte tin and JEDEC-standard moisture sensitivity level MSL-1.
TLC271ACD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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:
- 950µA
- 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:
- 8-SOIC
TLC271ACD FAQ
1.How can I place an order for TLC271ACD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC271ACD 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 TLC271ACD reliable?
The price and inventory of TLC271ACD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC271ACD is usually 5 days.
3.What payment methods are accepted for TLC271ACD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC271ACD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC271ACD?
TLC271ACD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC271ACD 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 TLC271ACD?
For technical support, including TLC271ACD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC271ACD requirements.
6.How does Aetrix verify that TLC271ACD is sourced from the original manufacturer or authorized distributors?
All TLC271ACD 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 TLC271ACD meets industry standards.
7.What is the process for return or replacement of TLC271ACD?
All TLC271ACD units undergo pre-shipment inspection (PSI). If there is an issue with TLC271ACD, 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 TLC271ACD part is unused and in its original packaging.
Return procedure for TLC271ACD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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