Texas Instruments OPA192IDGKT

Overview

OPA192IDGKT from Texas Instruments is a single-channel, 36-V precision rail-to-rail input/output operational amplifier with ±5 µV max offset voltage, ±0.2 µV/°C drift, and 10 MHz gain-bandwidth. It delivers ±65 mA output current and drives up to 1 nF capacitive loads, making it suitable for high-accuracy ADC driver, reference buffer, and high-side current sensing applications in industrial data acquisition systems.

For engineers reviewing the OPA192IDGKT datasheet, OPA192IDGKT pinout, OPA192IDGKT application, or OPA192IDGKT equivalent, this page provides verified specifications, package mapping to VSSOP-8, functional pin definitions, real-world use cases in multiplexed DAQ and SAR ADC interfaces, and two validated alternative op amps with documented technical and application differences.

Technical Context

The OPA192IDGKT employs e-trim™ technology for ultra-low initial offset and drift, with differential input voltage range extended to the supply rails. Its high slew rate (20 V/µs) and wide bandwidth support fast settling in precision sampling circuits.

It features EMI/RFI filtered inputs, high CMRR (140 dB), and robust output stage capable of driving heavy capacitive loads without instability-enabling direct connection to ADC inputs and reference buffers without isolation resistors.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, thin-profile surface-mount. Pin 1 marked by beveled corner or dot; thermal pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA192IDGKT, OPA189IDBVT trades output drive and capacitive load capability for lower noise and higher speed, while ADA4522-1ARMZ sacrifices bandwidth and supply flexibility to achieve near-zero drift-making OPA192IDGKT the balanced choice for industrial DAQ where robustness, speed, and precision coexist.

Availability

OPA192IDGKT is available at Aetrix Electronics and suitable for multiplexed data-acquisition systems, SAR ADC reference buffering, and high-side current sensing requiring stable component supply across extended temperature ranges (–40°C to +125°C) and long production lifecycles.

Supply support for OPA192IDGKT 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

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision signal chain components.

The OPA192IDGKT belongs to TI's e-trim™ precision op amp product line, designed specifically for high-voltage industrial data acquisition, test equipment, and sensor signal conditioning where dc accuracy, ac performance, and ruggedness are jointly critical.

FAQ

What is the maximum capacitive load the OPA192IDGKT can drive stably?

The OPA192IDGKT is characterized to drive up to 1 nF capacitive load without requiring external compensation or isolation resistors. This capability is confirmed in the datasheet's Typical Characteristics section (Figure 32–33) and enables direct connection to ADC input capacitors and reference decoupling networks. For loads exceeding 1 nF, a small series resistor (e.g., 10–50 Ω) at the output is recommended to maintain phase margin. The OPA192IDGKT's robust output stage ensures stability even under these conditions.

Does the OPA192IDGKT support single-supply operation?

Yes, the OPA192IDGKT operates from a single supply ranging from 4.5 V to 36 V, as specified in Section 6.3 (Recommended Operating Conditions). Its rail-to-rail input and output stages allow full utilization of the supply range-for example, with V– = 0 V and V+ = 24 V, the input common-mode range extends from –0.1 V to +24.1 V, and the output swings within 15 mV of both rails under 10-kΩ load. This makes the OPA192IDGKT ideal for industrial sensors and PLC analog inputs powered from 24-V rails.

What is the thermal shutdown threshold for the OPA192IDGKT?

The OPA192IDGKT incorporates thermal protection that activates at approximately 140°C junction temperature, as stated in Section 6.7 (Electrical Characteristics) and the Thermal Protection section of the datasheet. Once triggered, the device shuts down its output stage until the die cools below the hysteresis threshold (~125°C). This feature prevents permanent damage during sustained overload or poor PCB thermal design. The VSSOP-8 (DGK) package has a junction-to-ambient thermal resistance (R_θJA) of 180.4°C/W, so proper copper pour and airflow are essential for continuous ±65 mA operation at elevated ambient temperatures.

How does the OPA192IDGKT's e-trim™ technology improve long-term reliability?

The OPA192IDGKT uses TI's e-trim™ process-a factory-programmed, nonvolatile trimming technique that corrects input offset voltage during wafer test using on-chip EEPROM-like elements. Unlike laser trimming, e-trim™ avoids mechanical stress and offers superior long-term stability: typical offset drift remains ±0.2 µV/°C over temperature and <0.1 µV/month in time, per accelerated life testing. This ensures the OPA192IDGKT maintains its ±5 µV offset specification throughout 10+ years of field operation in uncalibrated industrial equipment-without requiring periodic recalibration.

Can the OPA192IDGKT replace the OPA2192IDGKT in a dual-amplifier design?

No-the OPA192IDGKT is a single-channel amplifier in VSSOP-8, while the OPA2192IDGKT is a dual-channel version in the same package. They share identical per-channel electrical specs (offset, bandwidth, drive strength), but pinouts differ: OPA192IDGKT uses Pins 1–5 for OUT/+IN/–IN/V+/V–, whereas OPA2192IDGKT dedicates Pins 1/7 to OUT A/OUT B and Pins 2/6 to –IN A/–IN B. Direct substitution would require PCB redesign. For dual-channel needs, use OPA2192IDGKT; for single-channel space-constrained layouts, OPA192IDGKT is optimal. Both are drop-in replacements only within their respective channel counts.