Texas Instruments LMV722MX

Overview

LMV722MX from Texas Instruments is a dual, rail-to-rail output, low-noise (9 nV/√Hz), low-voltage (2.2 V to 5.5 V), and low-power (1.81 mA typical at 2.2 V) operational amplifier in an SOIC-8 package. It delivers 10 MHz unity-gain bandwidth, 5.25 V/µs slew rate at 5 V, and operates across −40°C to +85°C - ideal for battery-powered microphone preamplifiers and portable active filters.

For engineers reviewing the LMV722MX datasheet, LMV722MX pinout, LMV722MX application, or LMV722MX 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 parts with documented functional and application-level differences.

Technical Context

The LMV722MX uses a bipolar input stage with 260 nA typical input bias current and achieves rail-to-rail output swing - 120 mV from either rail into 600 Ω at 2.2 V, and 135 mV at 5 V - enabling full dynamic range in low-voltage systems. Its input common-mode voltage range includes ground (−0.3 V to 4.1 V at 5 V), supporting single-supply sensing near 0 V.

It features 88 dB CMRR and 90 dB PSRR at 2.2 V, ensuring stable operation under supply and common-mode variation. The device drives up to 4700 pF capacitive load directly in unity-gain configuration without oscillation, validated by phase margin ≥67.4° at 2.2 V and ≥72° at 5 V.

Key Specifications

Pinout & Package

LMV722MX is housed in an 8-pin SOIC package (Package Drawing D, 3.91 mm × 4.90 mm × 1.75 mm body height), RoHS-compliant, with Sn lead finish and MSL Level-1 rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-voltage operational amplifier applications.

Compared with LMV722MX, LMV722MM/NOPB.A offers identical performance in a smaller footprint but with higher thermal resistance, while TLV272IDR trades noise, bandwidth, and low-voltage assurance for modest current reduction - making LMV722MX the optimal choice for noise-sensitive, wide-bandwidth, battery-critical designs.

Availability

LMV722MX is available at Aetrix Electronics and suitable for cellular phone audio front-ends, portable active filters, and battery-powered sensor interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LMV722MX 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 LMV722MX belongs to TI's LMV72x-N low-voltage op amp family, engineered specifically for battery-powered portable electronics where rail-to-rail output, low noise, and guaranteed sub-2.5 V operation are essential.

FAQ

What is the maximum capacitive load the LMV722MX can drive without external compensation?

The LMV722MX can directly drive up to 4700 pF in unity-gain configuration without oscillation, as validated by phase margin ≥67.4° at 2.2 V. This eliminates the need for isolation resistors in many ADC driver and cable-interface applications. For loads exceeding 4700 pF, TI recommends using the resistive-isolation circuit shown in Figure 23 of the LMV721-N/LMV722-N datasheet. The LMV722MX itself does not require external compensation under this condition.

Does the LMV722MX support true single-supply operation with input signals at ground potential?

Yes, the LMV722MX supports true single-supply operation with input common-mode voltage range extending to −0.3 V (at 25°C) and up to 4.1 V at 5 V supply - explicitly including ground. This allows direct interfacing with 0 V-referenced sensors like thermocouples or bridge circuits without level-shifting components. However, input voltages must not go more than −0.3 V below ground to avoid forward-biasing internal ESD diodes.

What is the guaranteed minimum output voltage swing for LMV722MX at 2.2 V supply into 600 Ω?

At 2.2 V supply and 25°C, the LMV722MX guarantees output swing to within 145 mV of either rail into a 600 Ω load - i.e., minimum high-level output is 2.065 V and minimum low-level output is 0.145 V. This rail-to-rail capability preserves >93% of available voltage range, critical for maximizing dynamic range in low-voltage audio and sensor signal chains.

Is LMV722MX pin-compatible with other dual op amps in SOIC-8 packages like the LM358 or MCP602?

No, LMV722MX is not pin-compatible with LM358 or MCP602. While all use SOIC-8, the LMV722MX pinout places Channel A inputs on Pins 1–2–3 and Channel B inputs on Pins 5–6–7, with V− on Pin 4 and V+ on Pin 8. LM358 uses Pins 2–3–1 for Channel A and Pins 5–6–7 for Channel B, but with V+ on Pin 8 and V− on Pin 4 - same power pin locations but swapped inverting/non-inverting inputs. Direct replacement would require PCB redesign.

What is the input bias current cancellation technique recommended for LMV722MX in precision applications?

TI recommends balancing resistor values at both inverting and non-inverting inputs to cancel input bias current error - e.g., placing equal resistances from each input to their respective bias networks. For the LMV722MX, typical input bias current is 260 nA at 5 V; a 100 kΩ resistor mismatch introduces ~26 mV offset. Figure 26 in the LMV721-N/LMV722-N datasheet shows the standard cancellation topology, which applies identically to LMV722MX due to its matched bipolar input stage.