Texas Instruments LMP7715MFX/NOPB

Overview

LMP7715MFX/NOPB from Texas Instruments is a single-channel, rail-to-rail output, precision CMOS-input operational amplifier optimized for low-noise, low-offset, high-bandwidth signal conditioning in portable and sensor interface applications. It delivers ±150 μV max input offset voltage, 100 fA typical input bias current, 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 - enabling high-fidelity amplification in battery-powered instrumentation.

For engineers reviewing the LMP7715MFX/NOPB datasheet, LMP7715MFX/NOPB pinout, LMP7715MFX/NOPB application, or LMP7715MFX/NOPB equivalent, key selection considerations include its SOT-23-5 package footprint, 1.15 mA supply current at 5 V, −40°C to +125°C operating temperature range, rail-to-rail output swing within 25 mV of rails, and suitability for transimpedance, active filter, and precision buffer designs requiring sub-200 μV offset and sub-100 fA bias current.

Technical Context

The LMP7715MFX/NOPB employs TI's VIP50 CMOS process to achieve ultra-low input bias current (100 fA) and low input voltage noise (5.8 nV/√Hz), making it suitable for high-impedance sensor front-ends where leakage and noise dominate error budgets. Its 17 MHz GBW and 6.0–9.5 V/μs slew rate support stable closed-loop operation up to ~1 MHz with moderate gains.

It features rail-to-rail output swing (25 mV from rails at 2 kΩ load), extended common-mode input range (to −0.3 V below V−), and robust PSRR (≥85 dB) and CMRR (≥85 dB) across 1.8–5.5 V supply - ensuring accuracy in single-supply, low-voltage systems such as medical sensors and portable data acquisition.

Key Specifications

Pinout & Package

Package: 5-pin SOT-23 (DBV), 2.9 mm × 1.6 mm footprint, surface-mount, moisture sensitivity level 1 (MSL-1).

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 LMP7715MFX/NOPB uniquely balances 17 MHz bandwidth, 100 fA bias current, and SOT-23-5 size - making it optimal for space-constrained, wideband, high-impedance sensor interfaces where zero-drift artifacts or excessive quiescent current are unacceptable.

Availability

LMP7715MFX/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor nodes, and medical diagnostics equipment requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for LMP7715MFX/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, embedded processing, and connectivity technologies, with decades of expertise in precision amplifiers and signal chain solutions.

The LMP7715MFX/NOPB belongs to TI's LMP™ precision amplifier family, engineered specifically for low-noise, low-offset, rail-to-rail output performance in battery-powered and high-impedance sensor interface applications.

FAQ

What is the maximum capacitive load the LMP7715MFX/NOPB can drive without oscillation?

The LMP7715MFX/NOPB can directly drive capacitive loads up to 120 pF in unity-gain follower configuration without oscillation, as verified in TI's SNOSAV0E datasheet Figure 32. For loads exceeding 120 pF, an isolation resistor (RISO) must be placed in series with the output to restore phase margin - typical values range from 10 Ω to 100 Ω depending on CL and layout parasitics. This capability simplifies PCB design for ADC input buffers and cable-driven outputs.

Does the LMP7715MFX/NOPB support true rail-to-rail input operation?

No, the LMP7715MFX/NOPB does not feature rail-to-rail input common-mode range. Its input common-mode voltage range extends to −0.3 V below V− and up to V+ − 1.2 V (at 5 V supply), per datasheet Section 6.5. However, it does provide rail-to-rail output swing - within 25 mV of both rails under 2 kΩ load - making it ideal for single-supply systems where output headroom is critical but input biasing can be managed externally.

What is the typical supply current of the LMP7715MFX/NOPB at 1.8 V supply?

At 1.8 V supply and TA = 25°C, the LMP7715MFX/NOPB draws 1.15 mA typical supply current, as specified in the "5V Electrical Characteristics" table (which applies across 1.8–5.5 V) and confirmed in Figure 17 of the SNOSAV0E datasheet. This ultra-low quiescent current enables multi-year battery life in always-on sensor nodes while retaining 17 MHz bandwidth and low-noise performance.

Can the LMP7715MFX/NOPB be used in automotive applications?

The LMP7715MFX/NOPB is rated for −40°C to +125°C operation and meets industrial temperature requirements, but it is not AEC-Q100 qualified. For automotive applications requiring qualification, TI offers the pin-compatible LMP7716Q dual op-amp (AEC-Q100 Grade 1). The LMP7715MFX/NOPB may be used in non-safety-critical cabin electronics where qualification is not mandated, but system-level validation remains the designer's responsibility.

How does the input capacitance of the LMP7715MFX/NOPB affect high-frequency stability?

The LMP7715MFX/NOPB exhibits ~5 pF typical input common-mode capacitance (Figure 50), which interacts with external feedback/gain resistors to form unintended poles. At high frequencies, this degrades phase margin and causes gain peaking. To mitigate, use lower-value resistors (e.g., ≤10 kΩ) and add a feedback capacitor (CF) - e.g., 2–5 pF - to suppress peaking, as demonstrated in Figure 53. This is essential in transimpedance and active filter designs above 100 kHz.