Texas Instruments LMP7718MAE/NOPB

Overview

LMP7718MAE/NOPB from Texas Instruments is a dual, decompensated, precision CMOS-input operational amplifier optimized for high-speed, low-noise signal conditioning in 1.8V–5.5V systems. It delivers 88 MHz gain bandwidth at G = +10, 5.8 nV/√Hz input voltage noise, ±150 µV max input offset voltage, and rail-to-rail output swing within 25 mV of either rail (10 kΩ load), enabling high-fidelity ADC interface and photodiode amplification.

For engineers reviewing the LMP7718MAE/NOPB datasheet, LMP7718MAE/NOPB pinout, LMP7718MAE/NOPB application, or LMP7718MAE/NOPB equivalent, key selection considerations include its minimum stable gain of +10, 1.30 mA per channel supply current, −40°C to 125°C operating range, and SOIC-8 package compatibility with space-constrained instrumentation designs.

Technical Context

The LMP7718MAE/NOPB employs a decompensated two-pole architecture with dominant pole at 1.6 kHz and second pole at 45 MHz, requiring closed-loop gain ≥10 for unconditional stability. Its VIP50 CMOS process enables 100 fA typical input bias current and rail-to-rail output stage with >40 mA sourcing capability at 1.8V.

It supports single-supply operation from 1.8V (0°C–125°C) or 2.0V–5.5V (−40°C–125°C), features input common-mode range extending to V−, and exhibits 85 dB min CMRR and PSRR across its full supply range-critical for precision sensor front-ends and low-voltage data acquisition.

Key Specifications

Pinout & Package

The LMP7718MAE/NOPB is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with standard 1.27 mm pitch, JEDEC MS-012AC compliant footprint, and exposed pad not present. Thermal resistance θ_JA = 190°C/W on 2-layer PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2188AIDR and ADA4625-2ACPZ-R7, the LMP7718MAE/NOPB uniquely combines 1.8V operation, 88 MHz bandwidth, and 5.8 nV/√Hz noise in a cost-optimized SOIC-8 package-making it optimal for battery-powered, wideband precision instrumentation where supply headroom is constrained.

Availability

LMP7718MAE/NOPB is available at Aetrix Electronics and suitable for ADC interface, photodiode amplification, and active filter design requiring stable component supply, long-term manufacturability, and guaranteed TI production continuity through 2030.

Supply support for LMP7718MAE/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 delivering analog, embedded processing, and connectivity solutions with deep manufacturing scale and broad technical support infrastructure.

The LMP™ precision amplifier family-including the LMP7718MAE/NOPB-is engineered for low-voltage, low-noise, high-speed signal conditioning in medical, test equipment, and industrial sensing applications where accuracy, power efficiency, and thermal robustness are critical.

FAQ

What is the minimum stable gain for LMP7718MAE/NOPB?

The LMP7718MAE/NOPB is decompensated and requires a minimum closed-loop gain of +10 (20 dB) for unconditional stability without external compensation. Operating below this gain risks oscillation due to insufficient phase margin; lead-lag RC networks can extend stability to lower gains but add design complexity. This differs from unity-gain-stable op amps and must be verified in each circuit layout.

Does LMP7718MAE/NOPB support true 1.8V operation across its full temperature range?

The LMP7718MAE/NOPB is specified for 1.8V operation only from 0°C to 125°C per its Electrical Characteristics table. For −40°C to 125°C operation, the minimum supply is 2.0V. Designers targeting extended temperature industrial or automotive use must therefore operate at ≥2.0V to ensure guaranteed functionality across the full range.

What is the maximum capacitive load LMP7718MAE/NOPB can drive without instability?

The LMP7718MAE/NOPB datasheet does not specify a maximum capacitive load for direct driving. Stability with capacitive loads depends on output impedance, gain configuration, and PCB layout. For loads >100 pF, isolation resistors (e.g., 10–50 Ω in series with the output) are recommended. TI's application notes advise verifying phase margin via simulation or bench testing when driving cables or ADC input capacitance.

How does the input common-mode voltage range of LMP7718MAE/NOPB compare to standard rail-to-rail input op amps?

The LMP7718MAE/NOPB features rail-to-rail *output* but only extends its input common-mode range to the negative rail (V−), not the positive rail. Its CMVR is −0.3 V to 4 V at 5 V supply-meaning it accepts inputs down to ground in single-supply use but cannot handle inputs near V+. This contrasts with true rail-to-rail input op amps and must be considered in level-shifting or sensor-biasing networks.

Can LMP7718MAE/NOPB be used as a comparator?

No-TI explicitly advises against using the LMP7718MAE/NOPB in open-loop configurations such as comparators. Its output stage uses positive feedback to enhance drive strength, which compromises comparator performance (e.g., propagation delay, output saturation behavior). Dedicated comparators like TLV3501 or LMH7322 are recommended for threshold detection tasks.