Texas Instruments THS4222DGN

Overview

THS4222DGN from Texas Instruments is a dual, rail-to-rail output, high-speed voltage-feedback operational amplifier optimized for low-distortion signal conditioning in data converter interfaces and video systems. It delivers 230 MHz small-signal bandwidth (G = 1), 975 V/µs slew rate, −90 dBc HD2 and −100 dBc HD3 at 5 MHz (RL = 499 Ω), and ±4.8 V output swing into 2 kΩ on ±5 V supplies - enabling high-fidelity analog front-end buffering for 10–12-bit ADC drivers.

For engineers reviewing the THS4222DGN datasheet, THS4222DGN pinout, THS4222DGN application, or THS4222DGN equivalent, key selection criteria include its dual-channel rail-to-rail output stage, thermal performance in the PowerPAD MSOP-8 package, differential gain/phase accuracy (0.007% / 0.007°), and compatibility with single-supply (3–15 V) and split-supply (±1.35–±7.5 V) operation.

Technical Context

The THS4222DGN implements a voltage-feedback architecture with unity-gain stability and a fully differential output stage capable of driving 499 Ω loads while maintaining <0.1 dB flatness to 40 MHz (G = 2). Its input stage features 33 MΩ input resistance and 1 pF common-mode capacitance, supporting wide common-mode range (−4.0 V to +4.0 V on ±5 V supplies) and 94 dB CMRR at 25°C.

Thermal design centers on the DGN package's exposed PowerPAD, requiring connection to a thermally conductive PCB plane to sustain 1.71 W power dissipation at TA ≤ 25°C without exceeding the 125°C long-term reliability junction limit. The device draws 14 mA per channel quiescent current and supports no external power-down control - unlike the THS4226 - as it lacks PD pins.

Key Specifications

Pinout & Package

The THS4222DGN is housed in an 8-pin MSOP PowerPAD (DGN) package with an exposed thermal pad on the underside, requiring solder connection to a PCB copper pour for thermal management. Package dimensions: 3.0 mm × 3.0 mm × 1.0 mm, pitch 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed op-amp applications.

Compared with THS4226DGQ and OPA2691U, the THS4222DGN uniquely balances rail-to-rail output swing, ultra-low distortion, and dual-channel integration in a thermally enhanced 8-pin MSOP - making it optimal for space-constrained, high-fidelity ADC interface and video signal path designs without power-down requirements.

Availability

THS4222DGN is available at Aetrix Electronics and suitable for high-speed data acquisition, broadcast video equipment, and portable instrumentation requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for THS4222DGN 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 over 50 years of innovation in high-performance amplifiers and data converter interfaces.

The THS4222DGN belongs to TI's THS422x family of rail-to-rail output, low-distortion, high-speed op-amps designed specifically for precision analog front ends in data converter systems, video signal routing, and instrumentation applications demanding wide bandwidth and exceptional linearity.

FAQ

What is the maximum output current capability of the THS4222DGN?

The THS4222DGN delivers ±100 mA output current per channel into 10 Ω loads at room temperature, enabling direct drive of low-impedance cables or termination networks without external buffers. This specification is validated across the full operating temperature range (−40°C to +85°C) and supports robust 150 Ω video back-termination and 499 Ω ADC input loading.

Does the THS4222DGN support single-supply operation?

Yes, the THS4222DGN operates from a single 3 V to 15 V supply, with guaranteed performance including rail-to-rail output swing (0.1 V to 4.9 V into 2 kΩ at 5 V) and 200 MHz bandwidth. Input common-mode range extends from 1.0 V to 4.0 V at 5 V supply, allowing direct coupling of bipolar signals using simple resistive biasing networks.

Is the THS4222DGN pin-compatible with other devices in the THS422x family?

No - the THS4222DGN (dual, no power-down) uses an 8-pin DGN package with pins 1–8 assigned to 1OUT, 1IN−, 1IN+, VS−, VS+, 2OUT, 2IN−, and 2IN+. In contrast, the THS4226DGQ (dual with power-down) uses a 10-pin DGQ package with additional PD and REF pins, and the THS4225DGN (single with power-down) has different pin mapping. No pin-to-pin compatibility exists across variants.

What thermal considerations apply to the THS4222DGN's PowerPAD package?

The THS4222DGN's DGN package incorporates an exposed PowerPAD that must be soldered to a minimum 100 mm² copper pour connected to VS− (or ground) for effective heat dissipation. Without this connection, junction temperature exceeds 125°C at <500 mW power dissipation, degrading distortion performance and long-term reliability. Thermal resistance ΘJA is 58.4°C/W with proper PCB layout.

How does the THS4222DGN perform in video applications requiring NTSC/PAL compliance?

The THS4222DGN meets broadcast video specifications with 0.007% differential gain error and 0.007° differential phase error at G = 2 into 150 Ω loads - measured per SMPTE RP-120 and ITU-R BT.470 standards. Its 40 MHz 0.1 dB flat bandwidth and −90 dBc HD2 ensure accurate luminance/chrominance separation and minimal color artifacts in composite video paths.