Texas Instruments LMV751M5

Overview

LMV751M5 from Texas Instruments is a low-noise, low-input-offset-voltage CMOS operational amplifier in SOT-23-5 package, delivering 4.5 MHz gain-bandwidth, 6.5 nV/√Hz input voltage noise at 1 kHz, and 500 µA typical supply current at 2.7 V - optimized for battery-powered portable electronics requiring rail-to-rail output swing and ground-referenced inputs.

For engineers reviewing the LMV751M5 datasheet, LMV751M5 pinout, LMV751M5 application, or LMV751M5 equivalent, key selection criteria include its 0.05 mV typical V_OS, unity-gain stability, 2.7–5.0 V single-supply operation, and ability to drive ≥1000 pF capacitive loads without oscillation.

Technical Context

The LMV751M5 employs a cascoded P-channel MOSFET input stage enabling ground-referenced common-mode input range (0 V min) with ~1.3 V headroom from V+, and a PNP-NPN common-emitter output stage supporting true rail-to-rail output swing - achieving 2.52 V minimum positive swing and 180 mV maximum negative swing at 2.7 V supply into 2 kΩ load.

Its internal compensation ensures unity-gain stability across 2.7–5.0 V supply, with 2 V/µs slew rate and 5 MHz GBW at 5 V, while maintaining low 0.01 pA/√Hz input current noise and <100 pA max input bias current - making it suitable for high-impedance sensor interfaces and low-power active filters.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body, moisture sensitivity level 1, lead finish NiPdAu/Sn, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, low-power op amp applications.

Compared with OPA333AIDBVR and MCP6001T-E/OT, the LMV751M5 uniquely balances 6.5 nV/√Hz noise, 4.5 MHz bandwidth, and 500 µA supply current - making it optimal for battery-powered signal chains demanding both AC fidelity and DC accuracy without zero-drift complexity or bandwidth sacrifice.

Availability

LMV751M5 is available at Aetrix Electronics and suitable for cellular phone audio front-ends, portable ECG monitors, and RF receiver IF amplifiers requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for LMV751M5 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 digital signal technologies, with over 90 years of innovation in high-reliability analog IC design.

The LMV751M5 belongs to TI's low-noise, low-power CMOS op amp product line, engineered specifically for space-constrained, battery-operated portable electronics needing precision, stability, and rail-to-rail performance.

FAQ

What is the maximum capacitive load the LMV751M5 can drive without instability?

The LMV751M5 is characterized to remain stable with capacitive loads up to 1000 pF, as confirmed in the datasheet's "Loading" section and Typical Performance Characteristics. This eliminates the need for output isolation resistors in many ADC driver and cable interface applications. For loads exceeding 1000 pF, a series resistor (e.g., 10–50 Ω) between the LMV751M5 output and the load is recommended to maintain phase margin. The LMV751M5's internal compensation ensures unity-gain stability across its full operating voltage range.

Does the LMV751M5 support true rail-to-rail input operation?

No, the LMV751M5 does not support rail-to-rail input. Its input common-mode voltage range extends to 0 V (ground-referenced), but requires ~1.3 V headroom from the positive supply rail - e.g., up to 3.6 V at V+ = 5.0 V. This is enabled by its cascoded P-channel MOSFET input stage. While not rail-to-rail on the high side, this architecture delivers ultra-low input bias current (<100 pA) and excellent CMRR near ground, distinguishing the LMV751M5 from bipolar-input alternatives.

What is the typical input offset voltage drift over temperature for the LMV751M5?

The LMV751M5 datasheet does not specify input offset voltage drift (µV/°C) as a guaranteed parameter; only the initial V_OS (0.05 mV typ., 1.5 mV max) is characterized over −40°C to +85°C. TI's application notes indicate typical drift is <1 µV/°C for this process, but designers requiring guaranteed low drift should consider zero-drift alternatives like the OPA333. The LMV751M5's low initial V_OS and high CMRR help mitigate thermal error contributions in most portable applications.

Can the LMV751M5 be used as a comparator?

The LMV751M5 is not recommended for comparator use. As stated in the "Comparator operation" application hint, its unity-gain compensation limits speed, its output stage may saturate under light loads causing supply current to rise to 20–30 mA, and logic-level compatibility is not guaranteed. Dedicated comparators (e.g., TLV3501) offer faster response, defined output states, and lower quiescent current. If forced into open-loop use, a 2–10 kΩ pull-down/pull-up load and hysteresis are mandatory - but this compromises the LMV751M5's core value proposition as a precision amplifier.

What is the thermal resistance (θ_JA) of the LMV751M5 in its SOT-23-5 package?

The LMV751M5 in the SOT-23-5 (DBV) package has a typical junction-to-ambient thermal resistance (θ_JA) of 274°C/W when soldered directly onto a standard PCB in still air, per the Recommended Operating Conditions table. This value assumes no additional copper pour or thermal vias. For continuous operation at maximum ambient temperature (85°C), power dissipation must be limited to ≤237 mW to keep junction temperature below 150°C. Layout best practices - including thermal pads and vias - can significantly reduce effective θ_JA in production designs.