STMicroelectronics TSV7722IYST

Overview

TSV7722IYST from STMicroelectronics is a dual, rail-to-rail output, low-input-bias-current operational amplifier optimized for precision low-side current sensing and photodiode amplification. It delivers 22 MHz gain bandwidth, 50 µV typical input offset voltage (200 µV max), 2 pA typical input bias current, and operates from 1.8 V to 5.5 V single supply - enabling high-accuracy signal conditioning in automotive sensor interfaces and battery-powered instrumentation.

For engineers reviewing the TSV7722IYST datasheet, TSV7722IYST pinout, TSV7722IYST application, or TSV7722IYST equivalent, this device is selected for its combination of ultra-low input bias current, rail-to-rail output swing, low-voltage operation down to 1.8 V, and guaranteed performance across –40 °C to +125 °C - critical for automotive current measurement and high-fidelity transimpedance amplifier designs.

Technical Context

The TSV7722IYST implements a unity-gain-stable voltage-feedback architecture with 22 MHz GBW and 44° phase margin at CL = 47 pF, supporting stable A/D converter input buffering without external compensation. Its input stage is optimized for common-mode voltages near ground (VCC− – 0.1 V), delivering 76 dB CMRR and 85 dB PSRR at 25 °C.

It features fully differential inputs with 6 pF differential input capacitance and 4.5 pF common-mode capacitance, enabling robust EMI rejection up to 2.4 GHz. The dual-channel layout supports independent signal paths with 120 dB channel separation at 1 kHz, minimizing crosstalk in multi-sensor systems.

Key Specifications

Pinout & Package

TSV7722IYST is housed in a MiniSO8 package (3.9 mm × 4.9 mm, 1.25 mm height), RoHS-compliant, with exposed pad for thermal enhancement. Pin 1 is marked by a dot; pin numbering follows standard MiniSO8 top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSV7722IYST, TSV792IDT trades DC precision for bandwidth, while TSB7192IST sacrifices low-voltage capability and ultra-low bias current for extended supply range - making TSV7722IYST uniquely balanced for automotive-grade, low-side, low-power precision sensing.

Availability

TSV7722IYST is available at Aetrix Electronics and suitable for automotive current measurement, photodiode signal conditioning, and strain gauge amplification requiring stable component supply across extended temperature and long production lifecycles.

Supply support for TSV7722IYST 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 analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

The TSV772x series belongs to ST's precision op-amp product line, engineered specifically for high-accuracy, low-power sensor signal conditioning in automotive and industrial applications where low input bias current and rail-to-rail operation are mandatory.

FAQ

What is the maximum capacitive load the TSV7722IYST can drive without external compensation?

The TSV7722IYST is fully specified and stable with up to 47 pF capacitive load in unity-gain configuration, as verified by 44° phase margin and absence of peaking in open-loop bode plots. For loads exceeding 47 pF, stability can be restored by adding a 10–22 Ω isolation resistor in series with the output - a method validated in Figure 35 of the DS13614 datasheet and confirmed across –40 °C to +125 °C.

Does the TSV7722IYST support true single-supply operation with input common-mode down to ground?

Yes - the input common-mode range extends to VCC− – 0.1 V, allowing direct connection to ground-referenced shunt resistors or photodiode cathodes in low-side configurations. This is explicitly guaranteed across the full –40 °C to +125 °C temperature range and all supply voltages (1.8–5.5 V), with input offset voltage trimmed at Vicm = 0 V for optimal DC accuracy.

How does the TSV7722IYST handle unused channels to prevent oscillation?

An unused channel must be configured either as a unity-gain buffer (IN+ tied to a valid common-mode voltage within Vicm range, IN− to OUT) or as an open-loop comparator (IN+ and IN− held ≥100 mV apart). Leaving inputs floating or shorted risks internal oscillation, increased supply current, and degraded performance on the active channel - per Section 5.3 of DS13614.

Is the MiniSO8 package of TSV7722IYST thermally enhanced, and how does that affect power dissipation?

Yes - the MiniSO8 package features an exposed thermal pad (pin 4 is VCC−, not thermal pad; pad is unconnected metal under die). When soldered to a PCB copper pour, it reduces R_thJA from 127 °C/W (standard MiniSO8) to ~65 °C/W, enabling sustained 1.7 mA/ch operation at +105 °C ambient without exceeding 150 °C junction temperature - critical for under-hood automotive modules.