Texas Instruments LMP7717MF/NOPB

Overview

LMP7717MF/NOPB from Texas Instruments is a 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 ±10 gain, 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), making it ideal for photodiode transimpedance amplifiers and ADC front-ends.

For engineers reviewing the LMP7717MF/NOPB datasheet, LMP7717MF/NOPB pinout, LMP7717MF/NOPB application, or LMP7717MF/NOPB equivalent, key selection considerations include its minimum stable gain of 10, 100 fA input bias current, −40°C to 125°C operation, SOT-23-5 package constraints, and need for external lead-lag compensation when used below unity-gain-stable configurations.

Technical Context

The LMP7717MF/NOPB employs a decompensated two-pole architecture with dominant pole at 1.6 kHz and second pole at 45 MHz, enabling 88 MHz GBW while maintaining 1.15 mA quiescent current. Its VIP50 CMOS process ensures femtoampere-level input bias current and ground-sensing input common-mode range (−0.3 V to V+ − 0.3 V).

Stability requires closed-loop gain ≥10 or external lead-lag compensation (RC network) to shift phase margin above 45°; uncompensated unity-gain use risks oscillation due to near-0° phase margin at the second pole. Output stage uses positive feedback to sustain >40 mA sourcing capability at 1.8 V, limiting open-loop comparator use.

Key Specifications

Pinout & Package

The LMP7717MF/NOPB is housed in a 5-pin SOT-23 package (DCU suffix per TI packaging nomenclature), with exposed pad not electrically connected. Thermal resistance θ_JA = 180°C/W on standard 2-layer PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA377AIDBVR and LMP7715MAX/NOPB, the LMP7717MF/NOPB trades guaranteed unity-gain stability for 5× higher bandwidth and lower input noise-making it optimal for high-fidelity, high-speed signal chains where external compensation is acceptable.

Availability

LMP7717MF/NOPB is available at Aetrix Electronics and suitable for photodiode amplifiers, precision ADC drivers, and low-noise sensor interfaces requiring stable component supply across industrial, medical, and test equipment programs.

Supply support for LMP7717MF/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 and embedded processing solutions, with over 90 years of innovation in precision analog ICs and manufacturing excellence.

The LMP™ precision amplifier family-including the LMP7717MF/NOPB-is engineered for low-voltage, low-noise, high-speed instrumentation applications where femtoampere bias, nanovolt noise, and rail-to-rail operation are critical.

FAQ

What is the minimum stable gain for LMP7717MF/NOPB, and why is it decompensated?

The LMP7717MF/NOPB requires a minimum closed-loop gain of +10 (20 dB) for unconditional stability due to its decompensated internal architecture-dominant pole at 1.6 kHz and second pole at 45 MHz yield near-0° phase margin at unity gain. This design sacrifices stability margin to achieve 88 MHz GBW at only 1.15 mA, doubling the speed-per-milliamp of unity-gain-stable alternatives like the LMP7715. External lead-lag compensation enables stable use at lower gains.

Can LMP7717MF/NOPB operate from a 1.8 V supply, and what performance is ensured at that voltage?

Yes, the LMP7717MF/NOPB is fully specified and production-tested for operation at 1.8 V supply across 0°C to 125°C ambient. At 1.8 V, it maintains rail-to-rail output swing (within 45 mV of rails at 2 kΩ), 1.15 mA typical supply current, and functional gain bandwidth-though GBW and slew rate are reduced versus 5 V operation. Key DC specs (offset, bias current, CMRR) remain ensured per datasheet limits.

What package type does LMP7717MF/NOPB use, and are there thermal considerations?

The LMP7717MF/NOPB uses the 5-pin SOT-23 package (TI package code DCU), with θ_JA = 180°C/W on standard 2-layer PCBs. No exposed thermal pad is present. Layout best practices include short, low-inductance power traces, 0.1 µF ceramic decoupling within 5 mm of pin 5 (V+), and grounding the substrate via shortest path to minimize noise coupling into the ultra-high-impedance inputs.

How does the input common-mode range of LMP7717MF/NOPB support single-supply sensor interfacing?

The LMP7717MF/NOPB features a ground-sensing input common-mode range extending to V− (0 V), allowing direct connection of 0 V-referenced sensors (e.g., thermocouples, bridge transducers) without level-shifting circuitry. With CMRR ≥83 dB over −0.3 V to 1.5 V (2.5 V supply) and ≥85 dB over −0.3 V to 4 V (5 V supply), it rejects supply noise and maintains accuracy even with noisy single-rail supplies.

Is LMP7717MF/NOPB suitable for use as a comparator, and what limits that application?

No-the LMP7717MF/NOPB is not recommended as a comparator. Its output stage uses positive feedback to enhance sourcing current (≥40 mA at 1.8 V), which degrades open-loop response and causes unpredictable propagation delay and latch-up risk under saturated conditions. The datasheet explicitly advises against open-loop use. For comparator functions, TI recommends dedicated devices such as TLV3501 or LMH7322.