Texas Instruments THS4501IDGK

Overview

THS4501IDGK from Texas Instruments is a high-performance fully differential amplifier optimized for ADC driving, single-ended-to-differential conversion, and active filtering in RF and communications systems. It delivers 370 MHz small-signal bandwidth, –90 dBc third-order intermodulation distortion at 30 MHz, 2800 V/μs slew rate, and output common-mode voltage control (VOCM) with ±5 V or 5 V supply operation - enabling precision signal conditioning in wireless receiver chains and high-speed data acquisition.

For engineers reviewing the THS4501IDGK datasheet, THS4501IDGK pinout, THS4501IDGK application, or THS4501IDGK equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for high-linearity differential signal path design - especially where IMD3, OIP3, VOCM accuracy, and thermal performance in MSOP-8 PowerPAD packages are critical.

Technical Context

The THS4501IDGK implements a fully differential architecture with independent input and output common-mode control, supporting both single-ended and differential inputs while maintaining balanced differential outputs. Its VOCM terminal enables precise setting of output common-mode voltage (e.g., 2.5 V for 5 V ADC interfaces), with 180 MHz small-signal bandwidth and ±0.1 V gain error over temperature.

It features rail-to-rail input common-mode range shifted to include the negative supply rail (–5.7 V min at ±5 V), 7 nV/√Hz input voltage noise, and 1.7 pA/√Hz input current noise - making it suitable for wide dynamic range applications such as 12–14-bit, 80+ MSps ADC front-ends where harmonic distortion and noise floor directly impact ENOB.

Key Specifications

Pinout & Package

The THS4501IDGK is housed in an 8-pin MSOP package with PowerPAD™ thermal enhancement (DGK suffix), requiring solder connection of the exposed pad to a PCB thermal plane for reliable junction temperature management under high-power operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4501IDGK, THS4500IDGK adds power-down capability at minor timing overhead, while THS4521IRGTR trades some IMD performance for lower noise and power - making THS4501IDGK the optimal choice for fixed-power, high-SFDR applications demanding –90 dBc IMD3 and robust VOCM control.

Availability

THS4501IDGK is available at Aetrix Electronics and suitable for wireless infrastructure, high-speed data acquisition, instrumentation signal conditioning, and active filter design requiring stable component supply, consistent parametric performance across temperature, and long-term manufacturability in MSOP-8 PowerPAD packaging.

Supply support for THS4501IDGK 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, embedded processing, and connectivity technologies, with decades of expertise in high-speed amplifier design and signal chain solutions.

The THS4501 belongs to TI's high-linearity fully differential amplifier product line, engineered specifically for demanding RF receiver, high-speed ADC driver, and precision instrumentation applications where distortion, noise, and common-mode control are critical.

FAQ

What is the key functional difference between THS4501IDGK and THS4500IDGK?

The THS4501IDGK lacks the power-down (PD) pin present on the THS4500IDGK - Pin 8 is NC (no connect) in THS4501IDGK versus PD in THS4500IDGK. All other electrical specifications, pinout (except Pin 8), and package are identical. THS4501IDGK is selected when continuous operation is required and power gating is unnecessary, simplifying layout and biasing.

Does THS4501IDGK support single-supply operation, and what is the minimum recommended supply voltage?

Yes, THS4501IDGK supports single-supply operation from 4.5 V to 15 V. The minimum recommended supply is 4.5 V for guaranteed performance across temperature; at 5 V, it delivers 320 MHz small-signal bandwidth, –60 dBc 3rd-harmonic distortion at 30 MHz, and ±3.3 V differential output swing into 1 kΩ load - sufficient for most 12-bit ADC interfaces.

How does the VOCM pin function in THS4501IDGK, and what happens if left unconnected?

The VOCM pin sets the output common-mode voltage via an internal resistive divider; when left floating, THS4501IDGK defaults to ~2.5 V (±0.1 V) on 5 V supply. For precise control (e.g., matching ADC reference), drive VOCM with a low-impedance source (≤1 kΩ). Input bias current is ≤3 μA at 2.5 V, and bandwidth remains 180 MHz - ensuring stable DC and AC common-mode tracking.

What thermal considerations apply to the THS4501IDGK in MSOP-8 PowerPAD (DGK) package?

The THS4501IDGK DGK package requires soldering the exposed PowerPAD to a dedicated PCB copper pour for thermal conduction. With θJA = 260°C/W, junction temperature rises significantly without proper thermal relief: at 34 mA quiescent current and 85°C ambient, TJ exceeds 125°C unless the pad connects to ≥2 in² of 2-oz copper. TI recommends using SLMA002/SLMA004 thermal guidelines for layout.

Can THS4501IDGK drive a 50 Ω differential load directly, and what is the maximum output current capability?

THS4501IDGK is not rated for direct 50 Ω differential load driving; its specified output current is 100 mA minimum into 20 Ω (per side), implying ~2.5 V swing into 50 Ω. For 50 Ω systems, use series termination (e.g., 392 Ω feedback/resistor network per TI reference designs) or add a current-boosting stage. Output balance error remains ≤ –58 dB up to 100 kHz, preserving signal integrity.