Texas Instruments LMP7711MK

Overview

LMP7711MK from Texas Instruments is a single-channel, precision CMOS-input operational amplifier optimized for low-noise, low-offset, rail-to-rail output signal conditioning in portable and sensor interface applications. It delivers ±150 μV max input offset voltage, 5.8 nV/√Hz input voltage noise at 1 kHz, 17 MHz gain bandwidth product, and operates from 1.8 V to 5.5 V supply. Its enable pin supports ultra-low-power shutdown (140 nA), making it ideal for battery-powered instrumentation.

For engineers reviewing the LMP7711MK datasheet, LMP7711MK pinout, LMP7711MK application, or LMP7711MK equivalent, key selection criteria include input bias current (≤100 fA), rail-to-rail output swing (within 25 mV of rails), temperature-stable offset drift (±4 μV/°C max), and compatibility with low-voltage single-supply systems down to 1.8 V.

Technical Context

The LMP7711MK employs a proprietary CMOS input stage enabling femtoampere-level input bias current and low input voltage noise-critical for high-impedance sensor front-ends. Its internal architecture integrates an enable-controlled power-down path that reduces quiescent current to 140 nA without compromising turn-on time (114 ns typical).

It features a unity-gain-stable, internally compensated design with 17 MHz GBW and 9.5 V/μs slew rate (rising edge), supporting accurate amplification up to closed-loop gains of 100× at 170 kHz. The device maintains rail-to-rail output swing across its full operating temperature range (−40°C to +125°C) and supports capacitive loads up to 120 pF directly.

Key Specifications

Pinout & Package

The LMP7711MK is housed in a 6-pin SOT-23 package (TI package code DDC), measuring 2.9 mm × 1.6 mm × 1.0 mm, optimized for space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op-amp applications.

Compared with OPA333AIDBVR and ADA4522-1ARMZ, the LMP7711MK uniquely balances 17 MHz bandwidth, 1.8 V operation, integrated enable, and 5.8 nV/√Hz noise-making it optimal for wideband, battery-operated sensor systems requiring both speed and efficiency.

Availability

LMP7711MK is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, battery-powered test equipment, and precision data acquisition systems requiring stable component supply and long-term manufacturability.

Supply support for LMP7711MK 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 signal-chain solutions.

The LMP7711MK belongs to TI's LMP™ precision amplifier family, engineered specifically for high-fidelity, low-power signal conditioning in instrumentation, sensor interfaces, and portable measurement systems.

FAQ

What is the maximum capacitive load the LMP7711MK can drive without external isolation?

The LMP7711MK can directly drive capacitive loads up to 120 pF while maintaining stability and avoiding oscillation. This is verified per TI's characterization data under unity-gain follower configuration with 5 V supply. For loads exceeding 120 pF, a series isolation resistor (RISO) is required between the output and CL to preserve phase margin. The LMP7711MK datasheet provides recommended RISO values based on load capacitance and required settling behavior.

Does the LMP7711MK support true single-supply operation with input voltages below ground?

Yes-the LMP7711MK supports a common-mode input voltage range extending to −0.3 V (i.e., 300 mV below V−), enabling true single-supply use with inputs referenced below ground. This is confirmed in the "Common Mode Voltage Range" specification (CMVR = −0.3 V to VS − 0.3 V) across all supply voltages (1.8 V to 5.5 V) and temperatures (−40°C to +125°C). The LMP7711MK maintains rail-to-rail output swing under these conditions.

What is the typical turn-on time for the LMP7711MK after enabling?

The typical turn-on time for the LMP7711MK is 114 ns, measured from EN rising to 90% of final output voltage under standard test conditions (VS = 5 V, RL = 10 kΩ, CL = 10 pF). This fast wake-up enables use in duty-cycled systems where rapid signal acquisition is required. The LMP7711MK datasheet specifies maximum turn-on time as 200 ns across temperature and process corners, ensuring predictable timing in real-time sensor sampling.

How does the LMP7711MK's input bias current compare to bipolar-input op-amps in sensor applications?

The LMP7711MK's input bias current is ≤100 fA-over six orders of magnitude lower than typical bipolar-input op-amps (e.g., LM741: ~80 nA). This enables direct interfacing with ultra-high-impedance sources like glass pH electrodes (>1 GΩ), photodiodes in photovoltaic mode, or piezoelectric sensors without significant DC error or signal attenuation. In contrast, bipolar-input devices would require guard rings, T-networks, or active guarding to mitigate bias-induced errors-adding complexity and noise.

Is the LMP7711MK pin-compatible with other members of the LMP77xx family?

No-the LMP7711MK (6-pin SOT-23) is not pin-compatible with the dual-channel LMP7712 (10-pin VSSOP) or any other variant in the LMP77xx family. Pin assignments, package footprints, and thermal characteristics differ significantly. While electrical specifications and functional behavior are closely aligned across the family, PCB layout must be designed specifically for the 6-pin SOT-23 footprint of the LMP7711MK. Migration to LMP7712 requires complete board redesign.