Texas Instruments THS4215DGK

Overview

THS4215DGK from Texas Instruments is a low-distortion, high-speed voltage feedback amplifier with power-down functionality, designed for ±5 V or single 5–15 V operation. It delivers 970 V/µs slew rate, 1 GHz small-signal bandwidth (G = 1), –90 dBc THD at 30 MHz, 0.007% differential gain, and 170 mA output drive - enabling high-fidelity signal conditioning in video, ADC preamplifier, and DAC buffer applications.

For engineers reviewing the THS4215DGK datasheet, THS4215DGK pinout, THS4215DGK application, or THS4215DGK equivalent, this page provides verified package mapping (MSOP-8), validated power-down timing (4 µs turn-on), confirmed harmonic distortion performance across load conditions, and real-world alternative selection guidance for wideband analog signal chain design.

Technical Context

The THS4215DGK employs a unity-gain stable voltage feedback architecture optimized for wideband AC performance. Its internal compensation enables stable operation at G ≥ 1 without external phase compensation, while the dedicated PD (Power-Down) pin provides TTL/CMOS-compatible control of quiescent current reduction to ≤900 µA.

It features matched input impedance (4 MΩ common-mode), low input capacitance (0.3 pF common-mode), and rail-to-rail output swing capability (±3.6 V min into 499 Ω at +85°C). The device maintains <0.1 dB gain flatness up to 130 MHz at G = 2 and supports dual- or single-supply configurations with PSRR > 64 dB.

Key Specifications

Pinout & Package

THS4215DGK is housed in an 8-pin MSOP package (DGK) with exposed thermal pad (non-electrical). Pin 1 is top-left corner (dot-marked), and the PowerPAD™ must be soldered to a thermally conductive PCB plane for reliable operation at full power.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed voltage feedback amplifier applications.

Compared with THS4211DGK and LMH6629MA/NOPB, THS4215DGK uniquely combines 1 GHz bandwidth, 970 V/µs slew rate, and integrated power-down in MSOP-8 - making it optimal for space-constrained, battery-aware, high-fidelity analog signal chains.

Availability

THS4215DGK is available at Aetrix Electronics and suitable for high-speed data acquisition, broadcast video infrastructure, and portable test equipment requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for THS4215DGK 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 high-performance amplifiers and precision signal chain solutions.

The THS4215 belongs to TI's high-speed voltage feedback amplifier product line, engineered specifically for demanding wideband applications including video, communications, and instrumentation where distortion, speed, and power efficiency are co-critical.

FAQ

What is the power-down behavior of the THS4215DGK?

The THS4215DGK enters low-power state when the PD pin is driven to REF+1.0 V (with REF = 0 V or VS–), reducing quiescent current to ≤900 µA. Turn-on delay is 4 µs to 50% of final supply current. During power-down, the output enters high-impedance state (250 kΩ typical), preventing loading of downstream circuitry. This behavior is fully characterized in the THS4215DGK datasheet Section 6.7.

Can THS4215DGK operate on single 5-V supply?

Yes, THS4215DGK supports single 5-V operation with input common-mode range from 1.2 V to 3.8 V and output swing from 1.2 V to 3.8 V (min, +25°C). It maintains –60 dBc THD at 30 MHz and 800 V/µs slew rate under 5-V conditions. For optimal video performance, use G = 2 with proper level-shifting network to center input within the valid common-mode window.

What is the thermal requirement for THS4215DGK in MSOP-8 package?

The THS4215DGK in DGK package has θJA = 260°C/W and maximum junction temperature limit of +125°C for continuous operation. To avoid thermal derating of distortion and bandwidth, the PowerPAD™ must be soldered to ≥1 cm² copper area with ≥4 thermal vias. At 24 mA quiescent current and ±5 V supplies, PCB thermal design must keep case temperature ≤+85°C to sustain full AC performance.

How does THS4215DGK compare to THS4211DGK in pin compatibility?

THS4215DGK and THS4211DGK share identical MSOP-8 footprint and pin assignments except Pin 7: THS4215DGK uses it as PD (power-down control), while THS4211DGK leaves it as NC. No PCB redesign is needed to substitute THS4215DGK for THS4211DGK - simply tie Pin 7 to VS– (0 V) to enable default ON operation. This makes THS4215DGK a drop-in upgrade when power-down capability is later required.

What load conditions are specified for THS4215DGK harmonic distortion metrics?

THS4215DGK harmonic distortion values are measured under controlled load conditions: –90 dBc THD at 30 MHz is specified with RL = 499 Ω, VO = 1 VPP, G = 1, and ±5 V supplies. For video applications (G = 2), –82 dBc HD3 is guaranteed with RL = 499 Ω, VO = 2 VPP. Performance degrades with lower RL (e.g., 150 Ω), so design validation must match actual system load impedance per THS4215DGK datasheet Table 6.10.