Texas Instruments LMV721M7X

Overview

LMV721M7X from Texas Instruments is a single-channel, rail-to-rail output, low-noise (9 nV/√Hz), low-voltage (2.2 V to 5.5 V) operational amplifier in SC70-5 package, delivering 10 MHz gain-bandwidth, 5.25 V/µs slew rate at 5 V, and 930 µA quiescent current at 2.2 V - optimized for battery-powered microphone preamplifiers and portable active filters.

For engineers reviewing the LMV721M7X datasheet, LMV721M7X pinout, LMV721M7X application, or LMV721M7X equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative op amps with documented functional and packaging differences.

Technical Context

The LMV721M7X uses a bipolar input stage with 260 nA typical input bias current and features rail-to-rail output swing (within 120 mV of either rail at 2.2 V into 600 Ω), enabling full dynamic range in low-voltage single-supply systems. Its input common-mode voltage range includes ground (−0.3 V to 1.3 V at 2.2 V), supporting direct sensing near GND.

It achieves stable unity-gain operation with up to 4700 pF capacitive load without oscillation and maintains ≥67° phase margin across 2.2 V–5.5 V supply range. The device is fabricated in TI's submicron BiCMOS process, ensuring consistent performance over −40°C to +85°C junction temperature.

Key Specifications

Pinout & Package

LMV721M7X is housed in a 5-pin SC70 package (DCK0005A), measuring 2.0 mm × 2.0 mm × 1.0 mm, with moisture sensitivity level 1 (260°C peak reflow), lead-free Sn finish, and tape-and-reel packaging (3000 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2761IDBVR and OPA333AIDBVR, LMV721M7X uniquely balances 10 MHz bandwidth, 9 nV/√Hz noise, and sub-1 mA quiescent current in SC70-5 - making it the only option among the three suitable for battery-powered audio preamps requiring both fidelity and runtime.

Availability

LMV721M7X is available at Aetrix Electronics and suitable for cellular handsets, portable medical sensors, and battery-powered audio interfaces requiring stable component supply across multi-year production cycles.

Supply support for LMV721M7X 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 decades of expertise in precision op amps and low-power signal chain solutions.

The LMV721M7X belongs to TI's LMV72x-N low-voltage op amp family, designed specifically for space-constrained, battery-operated systems demanding rail-to-rail output, low noise, and guaranteed 2.2 V operation.

FAQ

What is the maximum capacitive load the LMV721M7X can drive without external compensation?

The LMV721M7X can directly drive up to 4700 pF in unity-gain configuration without oscillation or instability, as verified in TI's SNOS414I datasheet Figure 23 and associated capacitive load tolerance analysis. This capability eliminates the need for series isolation resistors in many PCB layouts, simplifying design for compact audio and sensor interfaces. LMV721M7X maintains ≥67° phase margin under this condition, ensuring robust transient response. For loads exceeding 4700 pF, TI recommends the resistive-isolation circuit shown in Figure 23 of the same datasheet.

Does the LMV721M7X support true single-supply operation with input signals at ground potential?

Yes, the LMV721M7X supports true single-supply operation with input common-mode voltage range extending to V− (ground), as specified in the "Input Common-Mode Voltage Range Includes Ground" feature and confirmed by V_CM = −0.3 V minimum at 2.2 V supply in the 2.2 V DC Electrical Characteristics table. This allows direct connection of 0 V-referenced sensors like thermistors or bridge transducers without level-shifting circuitry. However, inputs must not fall below −0.3 V relative to V− to avoid forward-biasing internal ESD diodes.

What is the thermal resistance (θ_JA) of the LMV721M7X in its SC70-5 package?

The LMV721M7X in SC70-5 (DCK) package has a thermal resistance θ_JA of 440°C/W, as explicitly listed in the "Thermal Resistance (θ_JA)" section of the SNOS414I datasheet under "Silicon Dust SC70-5 Pkg". This value assumes standard JEDEC 2-layer board conditions. At 0.93 mA quiescent current and 2.2 V supply, power dissipation is ~2.05 mW, resulting in a junction-to-ambient rise of <1°C - confirming suitability for sealed, unventilated portable enclosures.

How does the LMV721M7X compare to the LMV721M5X in terms of package and performance?

The LMV721M7X and LMV721M5X share identical electrical specifications - including 10 MHz GBW, 9 nV/√Hz noise, and 930 µA I_Q - but differ exclusively in package: LMV721M7X uses SC70-5 (DCK), while LMV721M5X uses SOT-23 (DBV). Both are 5-pin, lead-free, RoHS-compliant, and rated for −40°C to +85°C. The SC70-5 package is smaller (2.0 × 2.0 mm vs. 2.9 × 1.6 mm) and has higher θ_JA (440°C/W vs. 265°C/W), making LMV721M7X optimal for ultra-compact layouts where thermal budget permits.

Is the LMV721M7X suitable for driving ADC inputs in 12-bit to 16-bit precision systems?

Yes, the LMV721M7X is suitable for driving 12-bit to 16-bit SAR and delta-sigma ADCs when configured as a buffered follower or gain stage. Its 3.5 mV max input offset voltage contributes <0.85 LSB error in a 12-bit 3.3 V system, and its 9 nV/√Hz noise adds negligible contribution compared to typical 16-bit ADC input-referred noise (≥1 µV RMS). Verified performance at 2.2 V ensures compatibility with low-voltage ADC references, and rail-to-rail output guarantees full-scale utilization without clipping.