Texas Instruments OPA210IDGKT

Overview

OPA210IDGKT from Texas Instruments is a dual-channel, precision, low-noise, rail-to-rail output operational amplifier built on super-beta bipolar process. It delivers 2.2 nV/√Hz voltage noise density at 1 kHz, 5 µV typical offset voltage, 0.1 µV/°C typical drift, and 18 MHz gain bandwidth - enabling high-fidelity signal conditioning in medical instrumentation and precision data acquisition systems.

For engineers reviewing the OPA210IDGKT datasheet, OPA210IDGKT pinout, OPA210IDGKT application, or OPA210IDGKT equivalent, this device is selected for ultra-low-noise, low-drift analog front-ends where 16-bit settling accuracy, ±2.25 V to ±18 V supply flexibility, and no phase reversal under overdrive are critical design requirements.

Technical Context

The OPA210IDGKT implements a fully differential input stage with super-beta PNP transistors, achieving sub-100 nVPP 0.1–10 Hz noise and 132 dB minimum CMRR. Its unity-gain stable architecture supports fast 2.6 µs 16-bit settling (10-V step) without external compensation.

It operates across –40°C to +125°C with rail-to-rail output swing (within 200 mV of rails at 10 kΩ), no phase reversal on common-mode overdrive, and robust ESD protection (±4 kV HBM). Input bias current remains ≤2 nA over temperature, supporting high-impedance sensor interfaces.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed 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 OPA210IDGKT, OPA211IDGKT trades 44% higher power for 50% lower voltage noise, while OPA2210IDGKT adds EMI hardening at minimal cost premium - making OPA210IDGKT the optimal balance of noise, drift, power, and cost for general-purpose precision signal chains.

Availability

OPA210IDGKT is available at Aetrix Electronics and suitable for ultrasound scanners, patient monitors, spectrum analyzers, and professional audio systems requiring stable component supply across extended product lifecycles.

Supply support for OPA210IDGKT 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 heritage in precision op amp innovation.

The OPAx210 family was designed specifically for high-resolution data acquisition and medical instrumentation, targeting applications demanding simultaneous low noise, low drift, rail-to-rail output, and wide supply range - all in industry-standard packages.

FAQ

What is the maximum capacitive load the OPA210IDGKT can drive stably?

The OPA210IDGKT is unity-gain stable and supports capacitive loads up to 2000 pF with controlled overshoot (<80%), as verified in Figure 6-37 of the datasheet. For loads >100 pF, a series resistor (typically 10–100 Ω) between output and load is recommended to maintain phase margin. This behavior applies identically to both channels of the OPA210IDGKT under all specified operating conditions.

Does the OPA210IDGKT support single-supply operation?

Yes, the OPA210IDGKT operates from a single supply of 4.5 V to 36 V, per Section 6.3 of the datasheet. Its rail-to-rail output and input common-mode range extending to within 1.5 V of each rail enable true single-supply use in 5 V, 12 V, or 24 V systems - for example, driving an ADC reference buffer or sensor signal conditioner without negative rails.

What is the thermal resistance (RθJA) of the OPA210IDGKT in its VSSOP-8 package?

The OPA210IDGKT in DGK (VSSOP-8) package has a junction-to-ambient thermal resistance (RθJA) of 171.3°C/W, as specified in Table 6-4. This value assumes standard JEDEC 2-layer board layout; actual thermal performance improves significantly with PCB copper pour and thermal vias under the exposed pad - critical for sustained 2.5 mA/channel operation at +125°C ambient.

How does the OPA210IDGKT handle input overvoltage beyond the supply rails?

The OPA210IDGKT features internal back-to-back diodes between inputs (Section 7.3.2), limiting differential input voltage to ~1.2 V. Exceeding ±0.5 V beyond rails risks forward-biasing these diodes, requiring external current limiting (≤10 mA) via series resistors. This protection scheme is identical across both amplifier channels in the OPA210IDGKT and does not affect normal linear operation.

Is the OPA210IDGKT pin-compatible with the OPA2210IDGKT?

Yes, the OPA210IDGKT and OPA2210IDGKT share identical VSSOP-8 (DGK) pinout, package dimensions, and electrical pin functions - including OUT A, –IN A, +IN A, V–, –IN B, +IN B, OUT B, and V+. They are drop-in replacements in layout; the OPA2210IDGKT adds integrated EMI filtering but requires no PCB changes when substituting for OPA210IDGKT.