Texas Instruments LMV751M5X

Overview

LMV751M5X from Texas Instruments is a low-noise, low-input-offset-voltage CMOS operational amplifier in SOT-23-5 package, delivering 6.5 nV/√Hz input voltage noise, 0.05 mV typical V_OS, and 4.5 MHz gain-bandwidth product at 500 µA supply current. It operates from 2.7 V to 5.0 V, supports rail-to-rail output swing, and is unity-gain stable-ideal for precision signal conditioning in battery-powered portable electronics.

For engineers reviewing the LMV751M5X datasheet, LMV751M5X pinout, LMV751M5X application, or LMV751M5X equivalent, key selection criteria include its low-noise performance at sub-1 kHz, ground-referenced inputs, 1000 pF capacitive load drive capability, and compatibility with space-constrained layouts requiring SOT-23-5 footprint and thermal resistance of 274°C/W.

Technical Context

The LMV751M5X uses 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 delivering rail-to-rail output swing within ~86–180 mV of either rail under 2 kΩ load. Its internal compensation ensures unity-gain stability without external components.

It achieves 6.5 nV/√Hz input voltage noise at 1 kHz and 0.01 pA/√Hz input current noise, making it suitable for low-source-impedance (<1 MΩ) precision amplification where voltage noise dominates. The device draws only 500 µA typ. at 2.7 V while maintaining 120 dB open-loop gain and >85 dB CMRR across −40°C to +85°C.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body, 274°C/W θ_JA, RoHS-compliant, NIPDAU lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV6741IDBVR and OPA333AIDBVR, the LMV751M5X uniquely balances 6.5 nV/√Hz noise, 4.5 MHz bandwidth, and 500 µA supply current in SOT-23-5 - making it the most energy-efficient option for mid-bandwidth, battery-sensitive signal chains where sub-millivolt offset is acceptable.

Availability

LMV751M5X is available at Aetrix Electronics and suitable for portable audio preamplifiers, medical biosensor interfaces, wireless environmental monitoring nodes, and industrial 4–20 mA loop receivers requiring stable component supply across multi-year production cycles.

Supply support for LMV751M5X 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 expertise in precision op amp design and manufacturing reliability.

The LMV751M5X belongs to TI's low-noise, low-power CMOS op amp family engineered for portable and battery-operated applications demanding high accuracy, small size, and robust single-supply operation.

FAQ

What is the maximum capacitive load the LMV751M5X can drive without instability?

The LMV751M5X is characterized to drive up to 1000 pF capacitive loads while maintaining phase margin and stability. For loads exceeding this value, a series isolation resistor (e.g., 10–100 Ω) between the output and capacitance is recommended to prevent peaking or oscillation. This behavior is confirmed in the "Loading" section of the official LMV751M5X datasheet (SNOS468E, p.9).

Does the LMV751M5X support true rail-to-rail input operation?

No - the LMV751M5X features ground-referenced inputs (0 V minimum common-mode voltage) but requires ~1.3 V headroom from the positive rail (e.g., V_CM ≤ 3.7 V at 5 V supply). Its input stage uses cascoded P-channel MOSFETs, enabling single-supply use with grounded sensors while excluding full rail-to-rail input swing. This is explicitly specified in the "Input Common-Mode Voltage Range" table (p.3–4, SNOS468E).

Can the LMV751M5X be used as a comparator?

The LMV751M5X is not optimized for comparator use. Its unity-gain compensation limits speed, and its PNP-NPN output stage may saturate and draw excessive current (20–30 mA) under open-loop conditions. TI explicitly advises against comparator operation unless a 2–10 kΩ load and hysteresis are applied. For dedicated comparison, TI recommends devices like TLV3701 or LMV7235 instead.

What is the thermal resistance (θ_JA) of the LMV751M5X in its SOT-23-5 package?

The LMV751M5X in the DBV (SOT-23-5) 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, as documented in the "Recommended Operating Conditions" table (p.2, SNOS468E). This value assumes no additional copper pour or thermal vias.

Is the LMV751M5X RoHS compliant and what is its moisture sensitivity level?

Yes - the LMV751M5X/NOPB.A is RoHS compliant (lead-free, NIPDAU finish) and rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH), per TI's Package Option Addendum (Nov 2025). This allows standard reflow assembly without baking, supporting high-volume manufacturing and long-term storage.