Texas Instruments SM73307MMX/NOPB

Overview

SM73307MMX/NOPB from Texas Instruments is a dual, low-noise, rail-to-rail output CMOS-input precision operational amplifier optimized for photovoltaic electronics and sensor interfaces. It delivers ±150 μV max input offset voltage, 5.8 nV/√Hz input voltage noise at 1 kHz, 17 MHz gain bandwidth product, 1.30 mA per-channel supply current, and operates from 1.8 V to 5.5 V across −40°C to 125°C - enabling high-fidelity signal conditioning in solar monitoring systems.

For engineers reviewing the SM73307MMX/NOPB datasheet, SM73307MMX/NOPB pinout, SM73307MMX/NOPB application, or SM73307MMX/NOPB equivalent, key selection criteria include ultra-low input bias current (100 fA), renewable energy grade qualification, AEC-Q100 compliance, and VSSOP-8 packaging for space-constrained instrumentation designs.

Technical Context

The SM73307MMX/NOPB employs TI's VIP50 CMOS process to achieve 100 fA input bias current and 5.8 nV/√Hz input voltage noise - critical for transimpedance amplifiers handling photodiode currents. Its 17 MHz GBW supports stable closed-loop gains up to 100× at 170 kHz while maintaining <0.001% THD+N at 1 kHz.

Designed for single-supply operation, it features rail-to-rail output swing (within 25 mV of rails at RL = 2 kΩ), extended input common-mode range (−0.3 V to V+ − 0.3 V), and enhanced stability with capacitive loads up to 120 pF - eliminating need for external isolation resistors in most photovoltaic front-end buffers.

Key Specifications

Pinout & Package

SM73307MMX/NOPB is housed in an 8-pin VSSOP package (Package Code DGK), measuring 3.0 mm × 3.0 mm × 1.0 mm with 0.5 mm pitch - optimized for compact PCB layouts in solar microinverters and portable test equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2333AIDGKR and ADA4522-2ARMZ, SM73307MMX/NOPB uniquely balances ultra-low input bias current (100 fA), photovoltaic-grade qualification, and 1.8 V operation - making it the only option qualified for direct integration into UL-certified solar microinverter signal chains without derating.

Availability

SM73307MMX/NOPB is available at Aetrix Electronics and suitable for photovoltaic electronics, transimpedance amplifiers, sensor interface applications, and automotive cabin monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SM73307MMX/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 over 90 years of innovation in precision analog ICs and power management solutions.

The SM73307MMX/NOPB belongs to TI's Renewable Energy Grade amplifier portfolio, engineered specifically for high-reliability signal conditioning in solar energy harvesting, battery monitoring, and automotive electrification systems.

FAQ

What is the maximum capacitive load the SM73307MMX/NOPB can drive without external compensation?

The SM73307MMX/NOPB can directly drive capacitive loads up to 120 pF while maintaining stability and avoiding oscillation - verified across its full operating temperature range (−40°C to 125°C) and supply voltage range (1.8 V to 5.5 V). This capability eliminates the need for series isolation resistors in typical photovoltaic string monitor PCB layouts where trace capacitance remains below this threshold. For loads exceeding 120 pF, a small isolation resistor (e.g., 10–50 Ω) should be added in series with the output.

Does the SM73307MMX/NOPB support true single-supply operation with input voltage extending below ground?

Yes, the SM73307MMX/NOPB supports true single-supply operation with an input common-mode voltage range extending to −0.3 V relative to V− (ground), enabling direct interfacing with sensors whose output may dip slightly below ground - such as thermocouples or certain pH electrodes. This feature is specified and tested across the full −40°C to 125°C temperature range and does not require level-shifting circuitry when used with 1.8 V to 5.5 V supplies.

How does the SM73307MMX/NOPB's 100 fA input bias current impact transimpedance amplifier design?

The SM73307MMX/NOPB's 100 fA maximum input bias current minimizes DC error in transimpedance amplifiers using high-value feedback resistors (e.g., 1 MΩ to 100 MΩ), ensuring photocurrent measurements remain accurate without significant offset-induced baseline shift. At 25°C, typical input bias current is just 0.1 pA - allowing stable operation with feedback networks that would otherwise saturate with conventional op-amps. This enables reliable detection of sub-nanoampere photodiode currents in fiber-optic receivers and environmental light sensors.

Is the SM73307MMX/NOPB qualified for automotive applications, and what standards does it meet?

Yes, the SM73307MMX/NOPB is qualified to AEC-Q100 Grade 1 (−40°C to 125°C) and carries Renewable Energy Grade certification - confirming compliance with enhanced manufacturing controls, defect detection methodologies, and reliability testing required for automotive under-hood and cabin electronics. It meets all stress tests defined in AEC-Q100 Rev G, including HTOL, TC, and ESD (HBM 2000 V), and is approved for use in EV solar roof monitoring, battery cell voltage sensing, and HVAC air quality modules.

What is the open-loop voltage gain (AVOL) of the SM73307MMX/NOPB, and how does it affect precision DC measurements?

The SM73307MMX/NOPB delivers a minimum open-loop voltage gain of 80 dB (10⁴ V/V) at 25°C with 2 kΩ load, rising to 95 dB (≈1.8×10⁴ V/V) typical - ensuring residual errors from finite gain remain below 100 μV in unity-gain buffer configurations. This high AVOL directly supports precision DC measurements in pH electrode buffers and thermopile interfaces, where loop gain above 80 dB maintains <0.01% gain error even with 10 kΩ source impedances and 100 kΩ feedback networks.