STMicroelectronics MC33172DT

Overview

MC33172DT from STMicroelectronics is a low-power dual bipolar operational amplifier optimized for single- or dual-supply operation from +4 V to +44 V (±2 V to ±22 V), featuring 200 µA per amplifier quiescent current, 2.1 MHz gain-bandwidth product, and rail-to-rail input common-mode range extending to V_CC–. It delivers 2 V/µs slew rate and 100 mV typical low-level output voltage near V_CC–, enabling use in battery-powered sensor signal conditioning.

For engineers reviewing the MC33172DT datasheet, MC33172DT pinout, MC33172DT application, or MC33172DT equivalent, key selection criteria include input offset voltage (1–6.5 mV), supply current stability over temperature (200–300 µA), common-mode rejection (80–100 dB), and SO-8 package thermal resistance (125 °C/W junction-to-ambient).

Technical Context

The MC33172DT employs a bipolar input stage with Class AB output stage, supporting rail-to-rail input operation down to V_CC– while maintaining stable phase margin (≥45°) under 10 kΩ load and 100 pF capacitance. Its internal compensation ensures unity-gain stability without external components.

It operates across –40°C to +105°C, with input bias current (20–200 nA) and offset drift (10 µV/°C) specified over full temperature range, and features ESD protection rated at 2 kV HBM, 200 V MM, and 1 kV CDM per JEDEC standards.

Key Specifications

Pinout & Package

MC33172DT is housed in an SO-8 plastic micropackage (JEDEC MS-012AA), with 1.27 mm pitch, 4.8–5.0 mm width, and 5.8–6.2 mm length. Thermal resistance is 125 °C/W (junction-to-ambient) and 40 °C/W (junction-to-case).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-power operational amplifier applications.

Compared with LM358DR and TLV2462IDR, the MC33172DT uniquely balances ultra-low I_Q, rail-to-rail input, and bipolar input linearity-making it optimal for precision, low-power industrial analog front-ends where cost, temperature range, and ESD robustness are jointly constrained.

Availability

MC33172DT is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, portable battery-powered instrumentation, 4–20 mA transmitter interfaces, and automotive body control module analog monitoring requiring stable component supply across extended temperature ranges.

Supply support for MC33172DT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets with emphasis on reliability, energy efficiency, and long-term product longevity.

The MC3x172 series was developed specifically for industrial and automotive analog signal chains requiring low power, wide supply range, and robust operation across –40°C to +105°C without performance degradation.

FAQ

Is MC33172DT suitable for single-supply operation with input signals referenced to ground?

Yes. The MC33172DT's input common-mode voltage range extends to V_CC–, allowing ground-referenced inputs in single-supply configurations (e.g., V_CC+ = +5 V, V_CC– = 0 V). Its 100 mV typical output swing above V_CC– preserves usable dynamic range without level-shifting circuitry.

What is the maximum capacitive load the MC33172DT can drive without instability?

The MC33172DT is internally compensated for unity-gain stability with up to 100 pF capacitive load when driving a 10 kΩ resistive load, as verified in the datasheet's phase margin test condition. For loads exceeding 100 pF, a series resistor (≥100 Ω) between output and capacitance is recommended to maintain ≥45° phase margin.

Does MC33172DT have built-in ESD protection, and what are the ratings?

Yes. The MC33172DT features integrated ESD protection rated at 2 kV per Human Body Model (HBM), 200 V per Machine Model (MM), and 1 kV per Charged Device Model (CDM), meeting industrial handling requirements without external protection diodes in most board-level implementations.

How does the MC33172DT's input offset voltage vary across temperature?

The MC33172DT has a typical input offset voltage drift of 10 µV/°C over –40°C to +105°C. At 25°C, V_IO is 1–4.5 mV; at +105°C, it increases by ≤0.8 mV (based on 10 µV/°C × 80°C delta), remaining within 6.5 mV max as specified in Table 3.