STMicroelectronics TSX923IST

Overview

TSX923IST from STMicroelectronics is a dual rail-to-rail input/output CMOS operational amplifier optimized for high-speed, low-distortion signal conditioning in automotive and industrial applications. It delivers 10 MHz gain bandwidth, 17.2 V/μs negative slew rate, and 0.0003 % THD+N at 1 kHz with 4 Vrms output - enabling precision active filtering, I/V conversion for ADC front-ends, and communications line drivers operating from 4 V to 16 V supply.

For engineers reviewing the TSX923IST datasheet, TSX923IST pinout, TSX923IST application, or TSX923IST equivalent, this device supports design of rail-to-rail analog signal chains requiring wide supply range, low input bias current (10 pA typ), ESD-hardened operation (4 kV HBM), and extended temperature stability (-40 °C to 125 °C) in MiniSO10 packaging.

Technical Context

The TSX923IST implements a unity-gain-stable CMOS input stage with rail-to-rail swing on both inputs and outputs, enabling full dynamic range utilization across its 4–16 V supply range. Its 10 MHz GBP and 17.2 V/μs slew rate support fast settling in closed-loop configurations up to 100 kHz without phase reversal.

It integrates independent shutdown control per amplifier (SHDN pin), reducing quiescent current to 7 µA per channel during inactive states. The MiniSO10 package supports thermal performance with R_thJA = 113 °C/W and maintains stable operation under ±0.1 V common-mode voltage extension beyond rails.

Key Specifications

Pinout & Package

TSX923IST is housed in a 10-pin MiniSO (SO-10) surface-mount package with exposed pad for thermal enhancement and standard JEDEC MO-187 footprint. Pin 1 is marked by a dot or beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSV912IDT and LMV358QDRQ1, TSX923IST uniquely combines 10 MHz bandwidth, 16 V operation, and integrated shutdown in a single MiniSO10 package - making it the only option for high-speed, wide-supply, automotive-qualified dual op-amp functions.

Availability

TSX923IST is available at Aetrix Electronics and suitable for automotive battery management, industrial process control, test equipment signal conditioning, and communications infrastructure requiring stable component supply across extended temperature and voltage ranges.

Supply support for TSX923IST 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The TSX92x family was developed specifically for high-speed, rail-to-rail signal conditioning in automotive and industrial applications demanding wide supply range, low distortion, and robust ESD immunity.

FAQ

What is the maximum capacitive load the TSX923IST can drive without instability?

The TSX923IST remains stable driving up to 120 pF with 10 kΩ load and no external compensation, as verified in Figure 21 of DS9502 Rev 5. For >120 pF, a 2–3 pF feedback capacitor (CF) is recommended to suppress overshoot above 20%, per Figure 28. Layout parasitics must be minimized - keep output trace length <5 mm and avoid vias near OUT pins.

Does the TSX923IST support single-supply operation with input signals near ground?

Yes - its rail-to-rail input stage operates with common-mode voltage down to (VCC−) − 0.1 V, allowing direct interface with 0 V-referenced sensors like thermistors or current shunts. At 16 V supply, inputs function correctly from −0.1 V to +16.1 V, confirmed in Table 2 and Figure 9 of the datasheet.

How does shutdown mode affect output state and channel isolation?

When SHDN is pulled low, both amplifiers enter high-impedance output state - OUT1 and OUT2 float with leakage <10 nA. Channel-to-channel isolation remains >120 dB (Figure 35), and residual crosstalk is unaffected. No output clamping or pull-down occurs; external termination is required if bus contention must be avoided.

Can the TSX923IST be used as a comparator?

It is not recommended - the TSX923IST lacks internal hysteresis, open-collector output, or guaranteed propagation delay specs. When driven with large differential inputs (>100 mV), input stage saturation causes slow recovery (tens of microseconds) and potential long-term Vio drift, as noted in footnote 2 of Table 3. Use dedicated comparators like TS882 for such roles.