Texas Instruments THS4504DGNRG4

Overview

THS4504DGNRG4 from Texas Instruments is a wideband, low-distortion fully differential amplifier with power-down capability, designed as a high-linearity ADC driver or single-ended-to-differential converter. It delivers 260 MHz small-signal bandwidth, –73 dBc third-order intermodulation distortion at 30 MHz, and 1800 V/µs slew rate under ±5 V supply, enabling precision signal conditioning in 12-bit, 80 MSps data acquisition systems.

For engineers reviewing the THS4504DGNRG4 datasheet, THS4504DGNRG4 pinout, THS4504DGNRG4 application, or THS4504DGNRG4 equivalent, key selection criteria include its power-down control (PD pin), VOCM-controlled output common-mode voltage, differential output swing up to ±7.4 V (±5 V supply), and MSOP-8 PowerPAD™ package optimized for thermal performance in RF receiver chains and active filtering circuits.

Technical Context

The THS4504DGNRG4 implements a fully differential architecture with independent input common-mode range extending to the negative rail (–5.7 V min at ±5 V supply) and precise output common-mode voltage control via the VOCM pin. Its internal feedback structure supports stable unity-gain operation and maintains balance error below –65 dB up to 100 kHz.

Power-down functionality is implemented through a dedicated PD pin with defined enable/disable thresholds (≥ –2.9 V enables, ≤ –4.3 V disables under dual supply), reducing quiescent current from 25 mA to 1.2 mA while preserving input impedance (50 kΩ || 1 pF) and enabling fast turn-on/turn-off delays (1000 ns / 800 ns).

Key Specifications

Pinout & Package

THS4504DGNRG4 is housed in an 8-pin MSOP PowerPAD™ (DGN) package with exposed thermal pad electrically isolated from all pins. The PowerPAD enhances thermal dissipation (θJC = 4.7 °C/W), supporting continuous operation at junction temperatures ≤ +125°C in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fully differential amplifier applications.

Compared with THS4505DGNRG4, THS4504DGNRG4 adds system-level power control without sacrificing linearity or bandwidth; versus THS4521RGTT, it trades raw speed and noise for VOCM configurability and lower quiescent power-making it optimal for adaptive, power-sensitive ADC interface designs.

Availability

THS4504DGNRG4 is available at Aetrix Electronics and suitable for wireless infrastructure, test equipment, and high-speed data acquisition requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for THS4504DGNRG4 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 signal chain components.

The THS4504 belongs to TI's high-speed differential amplifier product line, engineered specifically for precision ADC driving, RF receiver front-ends, and active filtering applications demanding exceptional linearity and flexible common-mode control.

FAQ

What is the function of the PD pin on the THS4504DGNRG4?

The PD (Power-Down) pin on the THS4504DGNRG4 is an active-low control input that places the amplifier into ultra-low-quiescent-current mode (<1.2 mA) when driven below –4.3 V (dual supply) or 0.7 V (single supply). When pulled above –2.9 V or 2.1 V respectively, the device operates normally with full bandwidth and drive capability. This feature enables dynamic power management in battery-operated or burst-mode systems without requiring external bias reconfiguration. The THS4504DGNRG4 defaults to enabled if the PD pin is left floating.

How does the VOCM pin affect THS4504DGNRG4 output behavior?

The VOCM pin on the THS4504DGNRG4 sets the DC common-mode voltage of the differential output pair (VOUT+ and VOUT−), allowing precise alignment to downstream ADC reference voltages (e.g., 2.5 V or 1.25 V). Internally, it controls a feedback loop that adjusts output offset to maintain the specified midpoint regardless of gain or load. With VOCM tied to 2.5 V, the THS4504DGNRG4 delivers symmetric ±3.3 V swing (5 V supply) or ±7.4 V (±5 V supply), eliminating need for external level-shifting circuitry and ensuring optimal ADC utilization.

What is the maximum differential output voltage swing for THS4504DGNRG4 at ±5 V supply?

At ±5 V supply, the THS4504DGNRG4 delivers a minimum differential output voltage swing of ±7.4 V into a 1 kΩ load, corresponding to a total peak-to-peak swing of 14.8 V. This specification holds across the full operating temperature range (–40°C to +85°C) and ensures compatibility with high-input-range differential ADCs such as the ADS5400 family. Swing is load-dependent: into 20 Ω, output current drive remains ≥100 mA, but voltage swing compresses due to internal output stage limitations.

Can THS4504DGNRG4 operate from a single 5 V supply?

Yes, the THS4504DGNRG4 supports single-supply operation from 4.5 V to 15 V. At 5 V supply, it achieves 210 MHz small-signal bandwidth, 900 V/µs slew rate, and ±3.3 V differential output swing (referenced to 2.5 V VOCM). Input common-mode range shifts to –0.7 V to +2.6 V, enabling direct interface with ground-referenced sources. Quiescent current drops to 21 mA max, and power-down current falls to 1200 µA-making it viable for portable instrumentation and low-voltage data acquisition systems.

What thermal considerations apply to THS4504DGNRG4 in the MSOP-8 PowerPAD™ package?

The THS4504DGNRG4 in the DGN package features an exposed thermal pad electrically isolated from all pins, providing θJC = 4.7 °C/W and θJA = 58.4 °C/W (JEDEC High-K board). To maintain junction temperature ≤ +125°C for long-term reliability and minimal distortion, PCB layout must solder the PowerPAD to a minimum 100 mm² copper pour with ≥4 thermal vias. At TA = +85°C, maximum continuous power dissipation is 685 mW-sufficient for typical 100–200 mW output drive in receiver chain applications without forced airflow.