STMicroelectronics TSB612IST

Overview

TSB612IST from STMicroelectronics is a dual, rail-to-rail output, low-power operational amplifier designed for precision signal conditioning in high-voltage industrial and automotive systems. It delivers 1 mV max input offset voltage, 560 kHz gain bandwidth product at 36 V, 125 µA max supply current per channel, and operates from −40 °C to 125 °C - enabling use in battery monitoring circuits within 24 V commercial vehicle powertrain modules.

For engineers reviewing the TSB612IST datasheet, TSB612IST pinout, TSB612IST application, or TSB612IST equivalent, key selection criteria include its extended 2.7–36 V supply range, rail-to-rail output swing (≤110 mV from rails at 36 V), input common-mode range including ground, 4 kV HBM ESD rating, and guaranteed performance across automotive temperature extremes.

Technical Context

The TSB612IST integrates two independent amplifiers in a single SO8 package with fully differential input stages supporting common-mode voltages from VCC− − 0.1 V to VCC+ − 1 V. Its unity-gain-stable architecture uses internal compensation optimized for capacitive loads up to 100 pF without external isolation resistors.

It features a high open-loop gain (>100 dB) and CMRR ≥105 dB at 36 V, enabling accurate DC-coupled sensing in noisy environments. The device maintains stable phase margin (≥58°) and low THD+N (0.004% at 1 kHz) across its full operating voltage and temperature range.

Key Specifications

Pinout & Package

TSB612IST is housed in an SO8 (Small Outline Integrated Circuit, 8-pin) package with standard 1.27 mm pitch and gull-wing leads. This RoHS-compliant, ECOPACK2-qualified package supports automated surface-mount assembly and provides thermal resistance (R_thJA) of 125 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual, rail-to-rail output, high-voltage op amp applications.

Compared with TSB612IST, TSB611IST offers identical performance in half the channel count and footprint, while LM358DR trades precision, rail-to-rail capability, and automotive temperature support for lower unit cost in less demanding applications.

Availability

TSB612IST is available at Aetrix Electronics and suitable for battery management systems, automotive HVAC controllers, industrial programmable power supplies, and on-board EV charger current sensing requiring stable component supply across long production lifecycles.

Supply support for TSB612IST 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 microcontrollers, power ICs, sensors, and analog components for automotive, industrial, and consumer markets.

The TSB61x series belongs to ST's precision analog portfolio, engineered specifically for high-voltage, low-power, automotive-grade signal conditioning - emphasizing rail-to-rail operation, wide temperature resilience, and ESD-hardened design for harsh environment reliability.

FAQ

What is the maximum capacitive load the TSB612IST can drive without oscillation?

The TSB612IST remains stable with up to 100 pF capacitive load when configured with unity gain and a 10 kΩ load to VCC/2, as verified in Figure 27 of DS11136 Rev 4. For loads exceeding 100 pF, a series isolation resistor (R_iso) of 10–100 Ω is recommended per Figure 35 to maintain ≥58° phase margin and prevent peaking or ringing.

Does the TSB612IST support true single-supply operation with input signals at ground potential?

Yes - the input common-mode voltage range extends to VCC− − 0.1 V, allowing direct connection of grounded sensors (e.g., shunt resistors, thermistors) without level-shifting circuitry. This is confirmed in Section 4.2 and Table 2 of DS11136 Rev 4, where Vicm minimum is specified as (VCC−) − 0.1 V across −40 °C to +125 °C.

How does the TSB612IST's 560 kHz gain bandwidth product translate to usable small-signal bandwidth?

At unity gain, the usable small-signal bandwidth equals the GBP (560 kHz). At gain = 10, the −3 dB bandwidth is approximately 56 kHz, assuming dominant-pole compensation. Measured phase margin remains ≥58° up to 100 pF load, confirming stable closed-loop response per Figure 25 and Table 3 AC performance data at 36 V.

Is the TSB612IST pin-compatible with other ST dual op amps like TS912 or TSV912?

No - TSB612IST uses a non-standard SO8 pinout (VCC− on Pin 4, VCC+ on Pin 5) differing from industry-standard dual op amp layouts (e.g., TS912 places VCC+ on Pin 8, VCC− on Pin 4). Direct replacement would require PCB redesign; consult ST's pinout diagrams in DS11136 Figure 1 to verify routing compatibility.