STMicroelectronics TSX7192IDT

Overview

TSX7192IDT from STMicroelectronics is a dual, decompensated, rail-to-rail input/output operational amplifier optimized for precision instrumentation and automotive applications. It delivers 200 µV max input offset voltage, 9 MHz gain bandwidth product, 2.7–16 V supply range, and operates across –40 °C to +125 °C - enabling high-accuracy current sensing and sensor interface circuits in battery-powered and under-hood systems.

For engineers reviewing the TSX7192IDT datasheet, TSX7192IDT pinout, TSX7192IDT application, or TSX7192IDT equivalent, key selection criteria include its minimum gain ≥10 stability requirement, rail-to-rail I/O capability at low supply voltages, low 50 pA max input bias current for high-impedance nodes, and AEC-Q100 qualification for automotive use.

Technical Context

The TSX7192IDT employs a decompensated two-stage CMOS architecture requiring closed-loop gain ≥10 for phase margin ≥42° and stable operation. Its rail-to-rail input stage uses complementary PMOS/NMOS differential pairs, enabling common-mode range from (V_CC– – 0.1 V) to (V_CC+ + 0.1 V), while the rail-to-rail output stage delivers <40 mV saturation voltage into 10 kΩ at both rails.

It features 1 TΩ input resistance and 12.5 pF input capacitance, supporting high-Z sensor interfaces without significant loading. The amplifier's 2.5 µV/°C max input offset drift and 4 kV HBM ESD rating are validated across –40 °C to +125 °C, meeting automotive reliability requirements without external protection.

Key Specifications

Pinout & Package

TSX7192IDT is housed in an SO8 package (8-pin small outline integrated circuit) with standard dual op-amp pinout and surface-mount footprint compatible with JEDEC MS-012AC. Thermal pad is not present; power dissipation is managed via PCB copper area per layout guidelines in Section 4.9 of the datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSX7192IDT, TSX712IDT trades bandwidth for unconditional stability, while TSX922IYDT offers speed at the cost of offset accuracy and automotive qualification - making TSX7192IDT the sole choice for AEC-Q100-compliant, high-precision, medium-bandwidth dual op-amp needs.

Availability

TSX7192IDT is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive current sensing, and high-impedance sensor interface applications requiring stable component supply, long-lifecycle support, and AEC-Q100 compliance.

Supply support for TSX7192IDT 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 automotive ICs for industrial, automotive, and consumer markets.

The TSX7192 belongs to ST's precision rail-to-rail op-amp product line, engineered specifically for high-accuracy signal conditioning in harsh-environment automotive and industrial systems where low offset, wide temperature range, and robustness are mandatory.

FAQ

Can TSX7192IDT operate stably at gain = 1?

No. TSX7192IDT is decompensated and requires minimum closed-loop gain of 10 for stability, as confirmed by phase margin ≥42° at G = 10 in Table 3. Using it at unity gain risks oscillation due to insufficient phase margin - verified by Bode plots in Figures 21–22. For G = 1 applications, ST recommends TSX712IDT instead.

What is the maximum capacitive load the TSX7192IDT can drive without instability?

TSX7192IDT remains stable with ≤100 pF capacitive load when driving 10 kΩ, as specified in gain bandwidth and phase margin test conditions (Table 3). Figure 24 shows overshoot increases sharply above 100 pF, indicating potential ringing; for loads >100 pF, an isolation resistor (≥100 Ω) between output and capacitor is required per application note AN2719.

Does TSX7192IDT support true rail-to-rail input when V_CC– = 0 V?

Yes. With V_CC– = 0 V, the input common-mode range extends to –0.1 V to V_CC+ + 0.1 V (Table 2), allowing inputs 100 mV below ground. However, input current must be limited to ≤10 mA (Table 1 Note 3) using series resistors if input voltage exceeds V_CC– – 0.2 V or V_CC+ + 0.2 V to prevent ESD diode conduction.

Is the 200 µV input offset voltage guaranteed over temperature?

No. The 200 µV maximum applies only at T_A = 25 °C (Table 3). Over full temperature range (–40 °C to +125 °C), max V_IO rises to 450 µV (Table 3, "Tmin < Top < 125 °C" row). This 2.5 µV/°C drift is characterized and usable for system-level error budgeting, but not guaranteed point-to-point across temperature.