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Texas Instruments LM8261M5X
- Part No.:
- LM8261M5X
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM8261M5X.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,534
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Product details
Overview
LM8261M5X from Texas Instruments is a single rail-to-rail input/output operational amplifier optimized for high-output-current, unlimited capacitive load driving, and wide supply operation (2.7V to 32V). It delivers 35 V/µs slew rate, 24 MHz gain-bandwidth product, ±125 mA short-circuit output current, and 12 nV/√Hz input voltage noise - enabling use in TFT-LCD VCOM drivers and precision A/D converter buffers.
For engineers reviewing the LM8261M5X datasheet, LM8261M5X pinout, LM8261M5X application, or LM8261M5X equivalent, key selection criteria include guaranteed unlimited capacitive load stability, rail-to-rail I/O at 3V supply, high-speed low-noise performance, and SOT-23-5 package compatibility with space-constrained analog signal paths.
Technical Context
The LM8261M5X employs a robust output stage architecture that maintains stability into infinite capacitive loads without external isolation resistors - a critical feature for flat-panel display VCOM buffering where load capacitance exceeds 1 µF. Its rail-to-rail input common-mode range extends beyond the supply rails (V− to V+), enabling accurate high-side and low-side current sensing without level-shifting circuitry.
Designed for operation across 2.7V–32V, the device exhibits minimal parameter variation over supply voltage changes - including PSRR of ±3.5 µV/V and CMRR of 90 dB - ensuring consistent DC accuracy and AC performance in industrial and automotive power-supply environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| GBW | 24 MHz - supports closed-loop bandwidth up to ~20 MHz at unity gain, suitable for fast buffer and driver stages. |
| Slew Rate | 35 V/µs - enables full-scale 10 V step response in under 300 ns, critical for transient-heavy display and audio applications. |
| Supply Range | 2.7V to 32V - operates from single 3.3V logic supplies to dual ±15V industrial rails without redesign. |
| Output Current | ±125 mA - drives heavy loads (e.g., 2 kΩ + 1 µF) while maintaining linearity and settling time. |
| Input Noise | 12 nV/√Hz @ 1 kHz - low-noise performance preserves SNR in precision sensor interfaces and ADC front-ends. |
| THD+N | < 0.00022% @ 1 kHz - ultra-low distortion supports high-fidelity headphone amplification and measurement-grade signal conditioning. |
| Cap Load Drive | Unlimited - eliminates need for series Riso compensation, simplifying layout and improving reliability in high-C bus drivers. |
Pinout & Package
The LM8261M5X is housed in a 5-pin SOT-23 package (2.9 mm × 2.8 mm), optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output | Amplified signal source capable of sourcing/sinking ±125 mA; rail-to-rail swing within 60 mV of V+ and V− at 2 kΩ load. |
| 2 - V− | Negative Supply | Ground or negative rail connection; supports single-supply (V− = GND) and dual-supply (V− = −VS) configurations. |
| 3 - IN+ | Non-inverting Input | High-impedance node (IB < 2 µA) with rail-to-rail common-mode range (V− to V+); enables direct sensing at supply extremes. |
| 4 - IN− | Inverting Input | Differential input node; used with feedback network to set gain and configure transimpedance or difference amplifier topologies. |
| 5 - V+ | Positive Supply | Main power input; accepts up to 32 V; decoupling capacitor required within 0.5 inch for stable high-frequency operation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail I/O | Input common-mode range extends from V− to V+, and output swings within 60 mV of both rails at 2 kΩ - enables full dynamic range utilization in low-voltage systems. |
| Unlimited Capacitive Load Drive | Stable operation into any capacitive load without oscillation or peaking - validated per TI's Figure 5-29 and 5-30, eliminating external compensation components. |
| High Output Current | ±125 mA short-circuit current rating allows direct driving of MOSFET gates, relay coils, and LCD segment lines without external buffers. |
| Low Input Voltage Noise | 12 nV/√Hz at 1 kHz - 25% lower than predecessor die - improves resolution in low-level signal amplification (e.g., strain gauge, thermopile interfaces). |
| Wide Supply Flexibility | 2.7V–32V operation with <2.23 mA max supply current across temperature - supports battery-powered sensors and 24V industrial PLC I/O modules. |
Applications
| TFT-LCD VCOM Driver | A/D Converter Buffer |
|---|---|
Use Scenario: Driving common voltage (VCOM) node in active-matrix LCD panels with load capacitance >1 µF and tight settling requirements. IC Role / Device Role / Timing Role: Precision voltage follower with unlimited capacitive load stability and rail-to-rail output swing to maintain display contrast and grayscale fidelity. Use Value: Eliminates external RC compensation, reduces BOM count by one component, and ensures monotonic settling in <500 ns per frame update. | Use Scenario: Buffering high-impedance sensor outputs (e.g., RTD, thermocouple) into SAR or delta-sigma ADC inputs. IC Role / Device Role / Timing Role: Low-noise, low-distortion unity-gain buffer isolating source impedance from ADC sampling capacitor kickback. Use Value: Preserves 16-bit+ ENOB via THD+N <0.00022% and 12 nV/√Hz noise floor - avoids gain error and harmonic aliasing in precision data acquisition. |
| High-Side Current Sensing | Headphone Amplifier |
Use Scenario: Measuring load current on the high-side of a 12V–24V power rail using a shunt resistor and differential amplifier configuration. IC Role / Device Role / Timing Role: Single-supply op-amp configured as difference amplifier with rail-to-rail input extending to V+ - enabling direct sensing without level shifters. Use Value: Achieves 90 dB CMRR across temperature, minimizing offset drift and enabling ±0.5% current measurement accuracy at 85°C ambient. | Use Scenario: Delivering 30 mW into 32 Ω headphones from a 5V USB-powered portable audio device. IC Role / Device Role / Timing Role: Low-distortion, rail-to-rail output buffer with ±125 mA drive capability - directly sourcing/sinking peak headphone currents. Use Value: Delivers audible-range THD+N <0.00022% and 35 V/µs slew rate - prevents slew-induced distortion during bass transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA365AIDBVR | Lower supply current (1.6 mA vs. 1.35 mA), higher GBW (50 MHz), but limited to 5.5V max supply and no unlimited cap-load guarantee. | Better for low-voltage, high-speed signal chains (e.g., portable test equipment); unsuitable for 24V VCOM or industrial sensing. | Select OPA365AIDBVR only when supply ≤5.5V and capacitive load ≤100 pF; LM8261M5X remains preferred for wide-VS, high-C applications. |
| TLV2782IDGKR | Lower slew rate (10 V/µs), narrower supply range (2.7V–6V), rail-to-rail I/O, but no specified unlimited capacitive load drive. | Targeted at ultra-low-power battery sensors; lacks drive strength and stability margin for display or audio loads. | Choose TLV2782IDGKR for sub-1 mA power budgets below 6V; LM8261M5X is required for ≥12V operation or >100 nF loads. |
Compared with OPA365AIDBVR and TLV2782IDGKR, the LM8261M5X uniquely combines 32V operation, ±125 mA output, and verified unlimited capacitive load stability - making it irreplaceable in TFT-LCD, industrial current sensing, and medium-power audio driver roles where other op-amps require external compensation or fail outright.
Availability
LM8261M5X is available at Aetrix Electronics and suitable for TFT-LCD VCOM driver designs, high-side current sensing circuits, and headphone amplifier implementations requiring stable component supply, long-term manufacturability, and guaranteed unlimited capacitive load performance.
Supply support for LM8261M5X 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, embedded processing, and connectivity technologies, with decades of op-amp innovation and broad industrial qualification.
The LM8261 product line was engineered specifically for high-output-current, rail-to-rail, capacitive-load-tolerant applications - targeting flat-panel display timing control, precision instrumentation, and power-sensitive analog signal conditioning.
FAQ
What is the maximum capacitive load the LM8261M5X can drive without oscillation?
The LM8261M5X is explicitly characterized and guaranteed for unlimited capacitive load drive - meaning it remains stable into any value of capacitive load (including >1 µF) without requiring external series isolation resistors. This capability is validated in TI's datasheet Figures 5-29 through 5-31 and forms the core design advantage of the LM8261M5X for TFT-LCD VCOM driver applications.
Does the LM8261M5X support true rail-to-rail input at 3V supply?
Yes, the LM8261M5X provides rail-to-rail input operation down to 3V supply, with input common-mode voltage range specified from V− to V+. At 3V single supply (V− = 0 V, V+ = 3 V), the input accepts signals from 0 V to 3 V - enabling direct interfacing with 3.3V logic and low-voltage sensors without attenuation or level shifting.
What is the thermal resistance (RθJA) of the LM8261M5X in SOT-23-5 package?
The LM8261M5X in the SOT-23-5 (DBV) package has a junction-to-ambient thermal resistance (RθJA) of 185.4 °C/W, measured on a standard JEDEC 2-layer board. This value assumes proper PCB copper pour and decoupling; actual thermal performance improves with added copper area and airflow, supporting continuous operation at up to 85°C ambient under typical load conditions.
Can the LM8261M5X be used in dual-supply ±15V applications?
Yes, the LM8261M5X is fully rated for dual-supply operation up to ±16V (32V total), and its electrical characteristics - including CMRR (90 dB), PSRR (±3.5 µV/V), and output swing - are specified across the full −40°C to +85°C temperature range at ±15V. It maintains rail-to-rail input and output functionality and delivers 35 V/µs slew rate under these conditions, making it suitable for industrial control and test equipment.
What is the input offset voltage specification for the LM8261M5X over temperature?
The LM8261M5X has a maximum input offset voltage of ±9 mV over the full operating temperature range of −40°C to +125°C, with a typical drift of ±2 µV/°C. This specification is guaranteed per TI's datasheet Section 5.5, Table "Electrical Characteristics", and applies under recommended operating conditions with VCM = V− - ensuring predictable DC accuracy in precision sensing and closed-loop control applications.
LM8261M5X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 12V/µs
- Gain Bandwidth Product:
- 24 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.05 µA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 1.3mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM8261M5X FAQ
1.How can I place an order for LM8261M5X through Aetrix?
Please submit a Request for Quotation (RFQ) for LM8261M5X 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 LM8261M5X reliable?
The price and inventory of LM8261M5X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM8261M5X is usually 5 days.
3.What payment methods are accepted for LM8261M5X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM8261M5X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM8261M5X?
LM8261M5X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM8261M5X 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 LM8261M5X?
For technical support, including LM8261M5X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM8261M5X requirements.
6.How does Aetrix verify that LM8261M5X is sourced from the original manufacturer or authorized distributors?
All LM8261M5X 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 LM8261M5X meets industry standards.
7.What is the process for return or replacement of LM8261M5X?
All LM8261M5X units undergo pre-shipment inspection (PSI). If there is an issue with LM8261M5X, 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 LM8261M5X part is unused and in its original packaging.
Return procedure for LM8261M5X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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