Texas Instruments SM73302MFE/NOPB

Overview

SM73302MFE/NOPB from Texas Instruments is a decompensated, precision CMOS-input operational amplifier optimized for low-noise, high-speed signal conditioning in 1.8V–5.5V systems. It delivers 88 MHz gain bandwidth at AV = +10, 5.8 nV/√Hz input voltage noise at 1 kHz, 1.15 mA supply current, and rail-to-rail output swing within 25 mV of either rail (10 kΩ load), enabling high-fidelity photodiode amplification and ADC front-end buffering.

For engineers reviewing the SM73302MFE/NOPB datasheet, SM73302MFE/NOPB pinout, SM73302MFE/NOPB application, or SM73302MFE/NOPB equivalent, key selection considerations include its minimum stable gain of +10, decompensated architecture requiring external lead-lag compensation for unity-gain use, ±150 µV max input offset voltage, −40°C to +125°C operating range, and SOT-23-5 package compatibility with space-constrained sensor interfaces.

Technical Context

The SM73302MFE/NOPB employs a VIP50 CMOS process with a dominant pole at 1.6 kHz and second pole at 45 MHz, enabling its 88 MHz GBW while maintaining only 1.15 mA quiescent current. Its open-loop gain exceeds 98 dB (RL = 10 kΩ) and phase margin approaches 0° at unity gain-necessitating closed-loop operation ≥+10 or external RC compensation.

Input stage features 100 fA max input bias current and rail-to-rail common-mode range (including ground), supporting single-supply sensor interfacing. Output stage delivers >40 mA sourcing capability at 1.8V and maintains THD+N ≤0.04% at 1 kHz into 600 Ω, confirming suitability for precision low-voltage signal chains.

Key Specifications

Pinout & Package

SM73302MFE/NOPB is housed in a 5-pin SOT-23 package (DBV) with exposed pad for thermal performance. Pin 1 is marked by a dot; device orientation follows JEDEC standard top-view layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMP7715MA/NOPB and OPA377AIDBVR, SM73302MFE/NOPB provides 5× higher bandwidth and lower voltage noise at modestly higher quiescent current-making it optimal for high-fidelity, high-speed sensor signal chains where external compensation is acceptable.

Availability

SM73302MFE/NOPB is available at Aetrix Electronics and suitable for photodiode amplification, ADC driver interface, and active filter applications requiring stable component supply, long-term manufacturability, and extended temperature support.

Supply support for SM73302MFE/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 SM73302MFE/NOPB belongs to TI's precision decompensated op amp family, engineered for high-speed, low-noise instrumentation in resource-constrained environments including renewable energy monitoring and portable medical devices.

FAQ

What is the minimum stable gain for SM73302MFE/NOPB?

The SM73302MFE/NOPB requires a minimum closed-loop gain of +10 (18 dB) for unconditional stability without external compensation. This is due to its decompensated architecture, which places the second pole at 45 MHz and yields near-zero phase margin at unity gain. Operating below gain +10 necessitates lead-lag RC compensation per Figure 47 in the SM73302MFE/NOPB datasheet to achieve ≥45° phase margin.

Does SM73302MFE/NOPB support rail-to-rail input?

No, SM73302MFE/NOPB does not support rail-to-rail input. Its input common-mode voltage range extends to the negative rail (V−) but only up to 1.5 V with 2.5V supply and 4 V with 5V supply-verified in the CMVR specifications. The input stage is CMOS-based and ground-sensing, making it ideal for single-supply sensor interfaces where the signal references V−, but it cannot accept signals near V+ without clipping or increased distortion.

What package type is used for SM73302MFE/NOPB?

SM73302MFE/NOPB uses the 5-pin SOT-23 (DBV) package, measuring 2.9 mm × 1.6 mm × 1.15 mm with a 0.95 mm pitch. It features a standard JEDEC top-view pinout (OUT, −IN, +IN, V−, V+) and includes an exposed thermal pad for enhanced power dissipation-critical for maintaining performance at elevated ambient temperatures up to +125°C.

Can SM73302MFE/NOPB operate from a 1.8V supply?

Yes, SM73302MFE/NOPB is fully specified to operate from a 1.8V supply within the 0°C to +125°C temperature range. At 1.8V, it maintains rail-to-rail output swing (within 45 mV of rails at 2 kΩ), 1.15 mA supply current, and functional gain bandwidth-enabling ultra-low-power designs such as solar-powered environmental sensors. Full 1.8V characterization is documented in the Operating Ratings table of the SM73302MFE/NOPB datasheet.

How does SM73302MFE/NOPB compare to LMP7715 in noise performance?

SM73302MFE/NOPB delivers superior noise performance versus LMP7715: 5.8 nV/√Hz (typical, 1 kHz, 5V) vs. 7.2 nV/√Hz. This 1.4 nV/√Hz reduction directly improves signal-to-noise ratio in low-amplitude sensor applications like photodiode amplification. Both share CMOS inputs and femtoampere bias currents, but SM73302MFE/NOPB achieves lower noise through optimized VIP50 process design and reduced internal thermal contributors.