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Texas Instruments LM8272MMX
- Part No.:
- LM8272MMX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM8272MMX.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,379
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Product details
Overview
LM8272MMX from Texas Instruments is a dual rail-to-rail input/output operational amplifier optimized for high-output-current, unlimited capacitive load drive, and wide supply operation (2.5 V to 24 V). It delivers ±65 mA output current at 1 V from rails, 15 MHz gain-bandwidth product, and 15 V/µs slew rate - enabling use in TFT-LCD VCOM driver circuits requiring stable DC bias with fast transient response under heavy capacitive loads.
For engineers reviewing the LM8272MMX datasheet, LM8272MMX pinout, LM8272MMX application, or LM8272MMX equivalent, key selection criteria include guaranteed rail-to-rail input common-mode range (−0.3 V to V+ +0.3 V), unlimited capacitive load stability, low 0.95 mA/channel quiescent current, and VSSOP-8 package compatibility with space-constrained display and sensing designs.
Technical Context
The LM8272MMX employs a dual-differential-pair input stage enabling rail-to-rail input operation beyond the supply rails by ±0.3 V while maintaining >50 dB CMRR. Its output stage uses complementary NPN/PNP emitter followers with internal current limiting and adaptive Miller compensation, ensuring unconditional stability with any capacitive load.
Supply voltage insensitivity is achieved across 2.5 V–24 V operation: key parameters including GBWP (15 MHz), slew rate (15 V/µs), and output swing (within 250 mV of rails at ±65 mA) remain consistent. Input voltage noise (15 nV/√Hz) and current noise (1.4 pA/√Hz) support precision low-noise buffering without added filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| GBWP | 15 MHz - supports closed-loop bandwidth up to ~1.5 MHz at gain = 10 without phase margin degradation. |
| Supply Range | 2.5 V to 24 V - enables single-supply 3.3 V/5 V logic interfacing and high-voltage analog biasing (e.g., ±12 V). |
| Slew Rate | 15 V/µs - ensures <1 µs settling to 0.1% for 10 V step into 100 nF load, critical for VCOM step response. |
| Output Current | ±65 mA at 1 V from rails - drives >1 µF TFT panel capacitance directly without external boost. |
| Cap Load Tolerance | Unlimited - no external isolation resistor required; stable with 10 nF–10 µF loads per channel. |
| Input CMVR | −0.3 V to V+ +0.3 V - supports high-side and low-side sensing without level-shifting circuitry. |
| Quiescent Current | 0.95 mA/channel - enables dual-channel operation at <2 mA total, suitable for battery-backed systems. |
Pinout & Package
LM8272MMX is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for thermal performance and PCB area efficiency in compact display and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Amplifier A output | Delivers rail-to-rail sourcing/sinking current; connects directly to VCOM line or sensor load. |
| 2 - −IN A | Inverting input A | Accepts feedback signal; compatible with unity-gain or inverting configurations up to 15 MHz. |
| 3 - +IN A | Non-inverting input A | Supports rail-to-rail common-mode input down to −0.3 V; used for high-side sensing reference. |
| 4 - V− | Negative supply | Ground reference in single-supply mode; accepts −12 V in split-supply applications. |
| 5 - +IN B | Non-inverting input B | Independent second channel input; enables dual-sensing or differential buffer architectures. |
| 6 - −IN B | Inverting input B | Second channel feedback node; allows independent gain setting per channel. |
| 7 - OUT B | Amplifier B output | Electrically isolated from OUT A; drives separate load (e.g., backlight dimming control). |
| 8 - V+ | Positive supply | Accepts up to 24 V; supplies both channels simultaneously with <2.9 mA total IQ. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input beyond rails | Operates with input voltages from −0.3 V to V+ +0.3 V - eliminates need for external clamping or level shifters in high-side sensing. |
| Unlimited capacitive load drive | Stable with any CL (10 pF to 10 µF); removes series resistor requirement and associated bandwidth loss in TFT-LCD buffers. |
| High output current (±65 mA) | Drives full-scale VCOM voltage steps across >1 µF panel capacitance without external FET boost stages. |
| Low quiescent current (0.95 mA/channel) | Enables dual op-amp functionality in power-sensitive applications such as portable medical displays or IoT HMI panels. |
| Wide supply range (2.5 V–24 V) | Supports direct interface with 3.3 V microcontrollers and 12 V/24 V industrial bus systems without LDO regulation. |
Applications
| TFT-LCD VCOM Driver | A/D Converter Buffer |
|---|---|
|
Use Scenario: Driving common electrode (VCOM) voltage in active-matrix LCD panels with dynamic gamma correction. IC Role / Device Role / Timing Role: Precision DC bias generator with fast transient response to pixel row updates; maintains VCOM stability during frame transitions. Use Value: Eliminates external MOSFET buffer due to ±65 mA output and unlimited capacitive load tolerance - reduces BOM count and layout area. |
Use Scenario: Buffering high-impedance sensor outputs (e.g., thermistor, strain gauge) before SAR ADC sampling. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail input follower that preserves signal integrity and prevents ADC input loading errors. Use Value: 15 nV/√Hz input voltage noise and >50 dB CMRR ensure <0.1% measurement error in 16-bit ADC systems at 25°C. |
| High-Side/Low-Side Sensing | Headphone Amplifier |
|
Use Scenario: Monitoring battery voltage and current in portable devices using shunt-based current sensing. IC Role / Device Role / Timing Role: Differential amplifier front-end with input range extending 0.3 V beyond supply rails - accommodates shunt voltage above V+ or below V−. Use Value: Enables single-supply sensing of bidirectional currents without level-shifting ICs or dual supplies. |
Use Scenario: Driving 16 Ω–32 Ω stereo headphone loads from portable audio DACs. IC Role / Device Role / Timing Role: Single-supply output buffer delivering 100 mW into 32 Ω with <0.02% THD+N at 1 kHz. Use Value: 15 V/µs slew rate and ±65 mA output prevent clipping on bass transients; rail-to-rail output maximizes dynamic range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Lower output current (±30 mA), narrower supply range (2.7 V–6 V), no unlimited cap load guarantee. | Suitable only for low-voltage, light-load buffering (e.g., sensor signal conditioning at 3.3 V). | Select TLV2462IDR when supply is ≤6 V and capacitive load <10 nF; avoid for VCOM or headphone drive. |
| OPA2340UA | Higher quiescent current (1.6 mA/channel), limited cap load stability (requires ≥10 Ω isolation resistor), GBWP = 5.5 MHz. | Used in precision instrumentation where ultra-low offset (<0.5 mV) outweighs drive capability. | Choose OPA2340UA for sub-mV offset-critical DC applications; LM8272MMX preferred for speed/load drive. |
Compared with TLV2462IDR and OPA2340UA, the LM8272MMX uniquely combines unlimited capacitive load stability, ±65 mA output, and 2.5 V–24 V operation - making it the only dual RRIO op amp qualified for direct TFT-LCD VCOM driving without external components.
Availability
LM8272MMX is available at Aetrix Electronics and suitable for TFT-LCD VCOM driver circuits, high-side/low-side current sensing systems, and headphone amplifier designs requiring stable component supply across automotive, industrial, and consumer display programs.
Supply support for LM8272MMX 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 over 50 years of innovation in precision amplifiers and power management solutions.
The LM8272MMX belongs to TI's high-output-current, rail-to-rail op amp product line - engineered specifically for flat-panel display biasing, sensor interface, and medium-speed analog signal conditioning where drive strength and capacitive load immunity are critical.
FAQ
What is the maximum capacitive load the LM8272MMX can drive without oscillation?
The LM8272MMX is explicitly characterized and guaranteed for unlimited capacitive load drive - meaning it remains stable with any value from 0 pF up to 10 µF or higher, without requiring external isolation resistors or compensation networks. This is confirmed in the datasheet's "Cap load tolerance" specification and validated in Figure 24 (Overshoot vs. Cap Load) and Figure 25 (Settling Time vs. Cap Load). The LM8272MMX achieves this via adaptive Miller compensation in its output stage, which dynamically adjusts dominant pole placement based on load capacitance.
Does the LM8272MMX support true rail-to-rail input operation beyond the supply rails?
Yes - the LM8272MMX features a dual-differential-pair input stage that extends the input common-mode voltage range to −0.3 V below V− and +0.3 V above V+, as specified in the "Input common mode voltage" parameter (−0.3 V to V+ +0.3 V). This enables high-side sensing (e.g., monitoring V+ rail voltage) and low-side sensing (e.g., shunt current measurement below ground) without external level-shifting circuitry. The design maintains >50 dB CMRR across this extended range, ensuring accuracy in bidirectional sensing applications.
What is the output current capability of the LM8272MMX at 12 V supply?
At 12 V supply (V+ = 12 V, V− = 0 V), the LM8272MMX delivers ±65 mA output current when the output is within 1 V of either rail, as confirmed in the 12 V Electrical Characteristics table (IOUT = ±65 mA, VID = ±200 mV). This is sufficient to drive typical TFT-LCD VCOM loads (often 0.5–2 µF) with <10 µs settling time. Short-circuit current is rated at ±130 mA (sourcing/sinking), but continuous operation above ±65 mA requires thermal derating per the RθJA = 235 °C/W specification.
Can the LM8272MMX operate from a single 3.3 V supply?
Yes - the LM8272MMX is fully specified and functional from 2.5 V to 24 V supply, including single 3.3 V operation. At 3.3 V, it maintains rail-to-rail input/output swing, 15 MHz GBWP, and 0.95 mA/channel quiescent current. Output swing reaches within 250 mV of each rail at ±65 mA load, supporting full-scale signal handling in low-voltage portable displays and IoT sensor nodes. The device's supply-insensitive architecture ensures consistent performance across this wide range.
What package type is used for the LM8272MMX, and what are its thermal characteristics?
The LM8272MMX uses the 8-pin VSSOP (DGK) package with nominal body dimensions of 3.00 mm × 3.00 mm. Its junction-to-ambient thermal resistance (RθJA) is 235 °C/W when soldered to a standard PCB, as documented in Section 6.4 of the datasheet. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with copper pour and thermal vias. Maximum junction temperature is 150 °C, and continuous operation requires ambient temperature derating when power dissipation exceeds (150 °C − TA)/235 °C/W.
LM8272MMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 15V/µs
- Gain Bandwidth Product:
- 15 MHz
- -3db Bandwidth:
- 12.5 MHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 1.9mA (x2 Channels)
- Current - Output / Channel:
- 65 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 24 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LM8272MMX FAQ
1.How can I place an order for LM8272MMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM8272MMX 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 LM8272MMX reliable?
The price and inventory of LM8272MMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM8272MMX is usually 5 days.
3.What payment methods are accepted for LM8272MMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM8272MMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM8272MMX?
LM8272MMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM8272MMX 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 LM8272MMX?
For technical support, including LM8272MMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM8272MMX requirements.
6.How does Aetrix verify that LM8272MMX is sourced from the original manufacturer or authorized distributors?
All LM8272MMX 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 LM8272MMX meets industry standards.
7.What is the process for return or replacement of LM8272MMX?
All LM8272MMX units undergo pre-shipment inspection (PSI). If there is an issue with LM8272MMX, 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 LM8272MMX part is unused and in its original packaging.
Return procedure for LM8272MMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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