Texas Instruments LMV321M7/NOPB

Overview

LMV321M7/NOPB from Texas Instruments is a single-channel, rail-to-rail output operational amplifier optimized for low-voltage (2.7 V to 5.5 V), space-constrained applications. It delivers 1 MHz gain-bandwidth, 1 V/µs slew rate, and 130 µA supply current at 5 V, with input common-mode range extending to ground and output swing within 10 mV of V+ and 65 mV of V− under 10 kΩ load - enabling precision signal conditioning in battery-powered portable devices and sensor interfaces.

For engineers reviewing the LMV321M7/NOPB datasheet, LMV321M7/NOPB pinout, LMV321M7/NOPB application, or LMV321M7/NOPB equivalent, key selection considerations include its SC70-5 package footprint (2.00 mm × 1.25 mm), guaranteed −40°C to +125°C operation, absence of crossover distortion, 7 mV max input offset voltage, and compatibility with single-supply systems requiring rail-to-rail output drive into moderate loads.

Technical Context

The LMV321M7/NOPB employs a bipolar input stage and BiCMOS output stage, delivering improved noise performance (39 nV/√Hz at 1 kHz) and higher output current drive versus CMOS-only op amps. Its unity-gain-stable architecture supports direct capacitive loading up to 200 pF without oscillation, and its input common-mode range includes ground - enabling true single-supply sensing near 0 V.

Designed as a low-voltage upgrade to the LM324 family, it maintains functional compatibility while eliminating crossover distortion and reducing supply current by ~40% versus LM324 at 5 V. The device operates across full industrial temperature range with no performance derating between 2.7 V and 5.5 V supply rails.

Key Specifications

Pinout & Package

LMV321M7/NOPB is packaged in a 5-pin SC70 (DCK) case measuring 2.00 mm × 1.25 mm × 0.95 mm, optimized for high-density PCB layouts and portable electronics. This ultra-small outline minimizes parasitic capacitance and enables placement adjacent to sensors or connectors to preserve signal integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV9001IDBVR and LMV321IDBVR, LMV321M7/NOPB provides the lowest quiescent current in its class while maintaining proven rail-to-rail output and ground-sensing capability - making it optimal for ultra-low-power, cost-sensitive portable designs where 7 mV VOS is acceptable.

Availability

LMV321M7/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, industrial temperature monitoring, smart home motion detectors, and wearable biopotential front-ends requiring stable component supply across extended product lifecycles.

Supply support for LMV321M7/NOPB 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 op amp design heritage and automotive-grade process validation.

LMV321M7/NOPB belongs to TI's LMV3xx-N general-purpose op amp family, engineered specifically for cost-sensitive, low-voltage, space-constrained applications where rail-to-rail output, ground-sensing input, and sub-200 µA quiescent current are critical system requirements.

FAQ

What is the maximum operating temperature range for LMV321M7/NOPB?

The LMV321M7/NOPB is specified for continuous operation from −40°C to +125°C across its full supply range (2.7 V to 5.5 V). This industrial-grade temperature rating is ensured per datasheet Section 7.4 and applies to all electrical parameters unless otherwise noted for specific test conditions. No derating is required within this range, and the device maintains rail-to-rail output swing and 1 MHz bandwidth throughout.

Does LMV321M7/NOPB support true single-supply operation with input signals at ground?

Yes, LMV321M7/NOPB supports true single-supply operation with input common-mode voltage ranging from −0.2 V to V+ − 0.8 V. This includes ground (0 V) within its specified common-mode range, enabling direct connection of ground-referenced sensors like thermistors or bridge circuits without level-shifting components. Input protection diodes limit negative excursion to −0.3 V absolute maximum.

What is the output drive capability of LMV321M7/NOPB into resistive loads?

LMV321M7/NOPB delivers rail-to-rail output swing into ≥10 kΩ loads: V+ −10 mV minimum and V− +65 mV minimum. Short-circuit current is rated at ±40 mA (sourcing/sinking), but sustained output currents above 10 mA require thermal consideration due to its SC70-5 package's 478°C/W junction-to-ambient thermal resistance. For 2 kΩ loads, output swing degrades to V+ −40 mV / V− +180 mV per datasheet Section 7.9.

Is LMV321M7/NOPB pin-compatible with other packages of the same part number?

LMV321M7/NOPB uses the SC70-5 (DCK) package. It is not pin-compatible with the SOT-23-5 (DBV) variant of LMV321-N, despite identical pin numbering - mechanical dimensions differ (SC70: 2.00 mm × 1.25 mm; SOT-23: 2.90 mm × 1.60 mm), and land patterns are not interchangeable. Board redesign is required when switching between these packages.

How does LMV321M7/NOPB handle capacitive loads in unity-gain buffer configuration?

LMV321M7/NOPB is unity-gain stable and tolerates up to 200 pF of capacitive load directly at its output without oscillation or excessive ringing, as confirmed in datasheet Figure 7-23 and Section 8.3.1. For loads >200 pF, external isolation (e.g., 10–100 Ω series resistor) or feedback network modification is recommended to maintain phase margin above 60°.