Texas Instruments OPA2626IDGKT

Overview

OPA2626IDGKT from Texas Instruments is a dual, high-speed, high-precision operational amplifier optimized as an ADC driver for 16-bit and 18-bit SAR converters. It delivers –122 dBc HD2 and –140 dBc HD3 at 100 kHz, 120 MHz gain-bandwidth product (G = 100), 115 V/µs slew rate, and 280 ns 16-bit settling time with 4-V step-enabling precision data acquisition in systems like the ADS8860.

For engineers reviewing the OPA2626IDGKT datasheet, OPA2626IDGKT pinout, OPA2626IDGKT application, or OPA2626IDGKT equivalent, key selection criteria include low distortion at high frequencies, rail-to-rail output swing, input common-mode range extending to the negative rail, DC precision (±100 µV offset), and operation across –40°C to +125°C.

Technical Context

The OPA2626IDGKT employs a high-fidelity topology with optimized internal compensation for stable unity-gain and high-gain configurations (G = 100). Its fully differential input stage supports wide common-mode input (V– to V+ – 1.15 V) and achieves 150 dB DC crosstalk suppression between channels.

It features low-output-impedance drive (1 Ω at 1 MHz) and fast overload recovery (50 ns), making it suitable for multiplexed SAR ADC front-ends where channel switching induces transient overdrive. The device maintains 110 dB open-loop gain (R_L = 600 Ω) and >50° phase margin across supply voltages from 2.7 V to 5.5 V.

Key Specifications

Pinout & Package

OPA2626IDGKT is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for space-constrained PCB layouts while maintaining thermal performance (R_θJA = 171.7°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision ADC driver applications.

Compared with OPA837IDBVR and THS4561IRGET, the OPA2626IDGKT uniquely balances dual-channel integration, rail-to-rail output, sub-100-µV offset, and –140 dBc HD3 at 100 kHz-making it the preferred choice for precision, multi-channel SAR ADC systems operating from 100 kSPS to 1 MSPS.

Availability

OPA2626IDGKT is available at Aetrix Electronics and suitable for precision SAR ADC drivers, programmable logic controllers, and test and measurement equipment requiring stable component supply, extended temperature support, and guaranteed 16-bit settling performance.

Supply support for OPA2626IDGKT 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 amplifiers and data converter interface solutions.

The OPA2626IDGKT belongs to TI's high-precision, high-speed op amp product line, designed specifically to meet the demanding AC and DC performance requirements of 16-bit and 18-bit SAR ADC signal chains in industrial and instrumentation applications.

FAQ

What is the maximum supply voltage for the OPA2626IDGKT?

The OPA2626IDGKT has an absolute maximum supply voltage rating of 6 V (V+ – V–). Its recommended operating supply range is 2.7 V to 5.5 V. Operation beyond 5.5 V risks permanent damage and is not characterized; for 5-V systems, the OPA2626IDGKT delivers optimal distortion and settling performance as verified in the SBOS690A datasheet.

Does the OPA2626IDGKT support single-supply operation?

Yes, the OPA2626IDGKT supports true single-supply operation with V– = 0 V and V+ = 2.7 V to 5.5 V. Its input common-mode range extends to the negative rail (0 V), and its rail-to-rail output swings within 20 mV of both supply rails at light loads-enabling direct interfacing with unipolar ADC inputs without level-shifting circuitry.

What is the 16-bit settling time specification for the OPA2626IDGKT?

The OPA2626IDGKT is specified for 280 ns settling time to 0.00153% (16-bit accuracy) with a 4-V output step at G = 2, measured under standard conditions (T_A = 25°C, V+ = 5 V, V– = 0 V). This value is guaranteed across the full –40°C to +125°C temperature range and forms the basis for timing-critical SAR ADC driver selection.

How does the OPA2626IDGKT compare to the OPA2627 in terms of noise performance?

The OPA2626IDGKT specifies 2.5 nV/√Hz input voltage noise density at 10 kHz, while the OPA2627 (a lower-noise variant) achieves 1.6 nV/√Hz at the same frequency. Both share identical pinout, gain-bandwidth, and settling specs-but the OPA2626IDGKT trades slight noise elevation for improved harmonic distortion (–140 dBc HD3 vs –135 dBc for OPA2627 at 100 kHz), favoring spectral purity in ADC applications.

Can the OPA2626IDGKT drive capacitive loads without external isolation resistors?

The OPA2626IDGKT can drive up to 22 pF capacitive load stably without series isolation resistance, as confirmed by Figure 4 and Figure 5 in the SBOS690A datasheet. For loads >22 pF (e.g., ADC input capacitance plus PCB trace), a 10-Ω to 50-Ω R_iso resistor is recommended to maintain phase margin >50° and prevent overshoot-critical for preserving 16-bit settling integrity in the OPA2626IDGKT.