Texas Instruments LMV844MTX/NOPB

Overview

LMV844MTX/NOPB from Texas Instruments is a quad-channel, rail-to-rail input/output (RRIO), CMOS-input operational amplifier optimized for high-impedance sensor interface and battery-powered instrumentation. It operates from 2.7 V to 12 V, delivers 4.5 MHz unity-gain bandwidth, draws only 1.03 mA per channel at ±5 V, and features 0.3 pA input bias current and 500 µV max input offset voltage - enabling precision signal conditioning in portable medical sensors and low-power data acquisition systems.

For engineers reviewing the LMV844MTX/NOPB datasheet, LMV844MTX/NOPB pinout, LMV844MTX/NOPB application, or LMV844MTX/NOPB equivalent, key selection criteria include its guaranteed RRIO swing at 3.3 V/5 V/±5 V supplies, −40°C to +125°C operating range, ultra-low input bias current for photodiode or pH electrode interfaces, and compatibility with space-constrained PCBs using the 14-pin TSSOP package.

Technical Context

The LMV844MTX/NOPB integrates four independent high-precision op-amp channels sharing a common CMOS input stage with 112 dB CMRR and 108 dB PSRR. Its architecture supports stable operation with capacitive loads up to 100 pF and maintains phase margin ≥67° across supply voltages (2.7–12 V) and temperatures (−40°C to 125°C).

Each channel provides rail-to-rail output swing within 32 mV of rails (at 10 kΩ load, 5 V supply) and input common-mode range extending 0.2 V beyond rails, enabling direct interfacing with single-supply ADCs and DACs without level-shifting circuitry.

Key Specifications

Pinout & Package

LMV844MTX/NOPB is packaged in a 14-pin TSSOP (PW) with nominal body size 5.00 mm × 4.40 mm. This thermally enhanced, surface-mount package supports automated assembly and delivers R_θJA = 85.4°C/W for reliable operation in compact enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar operational amplifier applications.

Compared with TLV9064IPWR and OPA4991IPWR, LMV844MTX/NOPB uniquely balances ultra-low input bias current, wide 2.7–12 V operation, and 125°C qualification in a compact TSSOP-14 - making it optimal for cost-sensitive, thermally demanding, multi-channel sensor hubs where power and space are constrained.

Availability

LMV844MTX/NOPB is available at Aetrix Electronics and suitable for medical sensor interface, battery-powered data loggers, industrial process control, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LMV844MTX/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 expertise in precision amplifiers and low-power signal chain solutions.

The LMV844MTX/NOPB belongs to TI's LMV84x family of CMOS-input, RRIO op-amps designed specifically for high-impedance sensor interfacing and portable instrumentation - emphasizing low power, wide supply range, and robust performance across automotive and industrial temperature grades.

FAQ

What is the maximum capacitive load the LMV844MTX/NOPB can drive while maintaining stability?

The LMV844MTX/NOPB maintains phase margin ≥67° with capacitive loads up to 100 pF when properly decoupled (0.1 µF ceramic capacitor near V+ pin). For loads >50 pF, TI recommends adding a 10 Ω isolation resistor in series with the output to prevent peaking or oscillation in active filter or ADC driver configurations. This behavior is verified across all supply voltages (3.3 V, 5 V, ±5 V) and temperature extremes (−40°C to 125°C).

Does the LMV844MTX/NOPB support true rail-to-rail input common-mode range?

Yes - the LMV844MTX/NOPB guarantees input common-mode voltage range from V−–0.1 V to V++0.2 V at 3.3 V supply, and from V−–0.2 V to V++0.2 V at 5 V supply. This allows direct interfacing with grounded sensors and single-supply ADC references without external level-shifting circuitry, unlike many competing op-amps that require input biasing above ground.

How does the input offset voltage drift of LMV844MTX/NOPB compare across supply voltages?

LMV844MTX/NOPB exhibits input offset voltage drift of 0.25 µV/°C at ±5 V, 0.35 µV/°C at 5 V, and 0.5 µV/°C at 3.3 V - all specified over −40°C to +125°C. This monotonic improvement with higher supply reflects reduced CMOS input stage stress, making ±5 V operation optimal for ultra-stable DC-coupled measurement chains where drift <0.3 µV/°C is critical.

Can LMV844MTX/NOPB be used in single-supply 3.3 V systems with an ADC referenced to AVDD?

Yes - LMV844MTX/NOPB's rail-to-rail output swings to within 28 mV of V+ (3.3 V) and 33 mV of V− (GND) at 10 kΩ load, delivering 0–3.27 V full-scale range. Combined with its input common-mode range extending to GND, it directly drives 12-bit SAR ADCs like the ADS7953 without external clamping or level-shifting, preserving SNR and reducing BOM count.

What is the thermal resistance (R_θJA) of the LMV844MTX/NOPB in its TSSOP-14 package?

The LMV844MTX/NOPB in the PW (TSSOP-14) package has a junction-to-ambient thermal resistance (R_θJA) of 85.4°C/W when mounted on a standard 2-layer PCB with JEDEC-standard copper pour. This value assumes no internal thermal vias; adding two 0.3-mm thermal vias per power pad reduces R_θJA by ~12°C/W, enabling continuous 4-channel operation at ambient temperatures up to 85°C without derating.