Texas Instruments THS4503CDGNRG4

Overview

THS4503CDGNRG4 from Texas Instruments is a high-performance fully differential amplifier optimized for precision signal conditioning in high-speed data acquisition systems. It delivers 370 MHz small-signal bandwidth, 2800 V/µs slew rate, and -95 dBc third-order intermodulation distortion at 30 MHz - enabling 14-bit ADC preamplification up to 40 MHz with exceptional linearity. Its centered input common-mode range and output common-mode voltage control (VOCM) support seamless interfacing with modern SAR and pipeline ADCs.

For engineers reviewing the THS4503CDGNRG4 datasheet, THS4503CDGNRG4 pinout, THS4503CDGNRG4 application, or THS4503CDGNRG4 equivalent, key selection criteria include differential output drive capability (±7.4 V swing into 1 kΩ), VOCM bandwidth (180 MHz), thermal oscillation limit (max 60°C junction temperature), and MSOP-8 PowerPAD™ package thermal performance (θJA = 58.4°C/W).

Technical Context

The THS4503CDGNRG4 employs a fully differential architecture with symmetrical input and output stages, supporting both single-ended-to-differential and differential-to-differential conversion. Its open-loop gain of 50 dB (min) and 80 dB CMRR enable precise gain-setting with external resistors while maintaining balance across wide bandwidths.

Unlike the THS4502, this variant omits power-down functionality - simplifying biasing and eliminating PD pin routing. The VOCM terminal provides active control of output common-mode level with 0.98–1.02 V/V gain accuracy and ±4 V input range, making it ideal for DC-coupled ADC driver applications requiring programmable offset alignment.

Key Specifications

Pinout & Package

The THS4503CDGNRG4 is housed in an 8-pin MSOP package with exposed PowerPAD™ thermal pad (DGN suffix), requiring solder connection to PCB ground plane for thermal integrity and optimal AC performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4502CDGNRG4, THS4503CDGNRG4 removes complexity by eliminating power-down logic, improving stability margin and reducing layout sensitivity. Against LMH5401RTVR, it trades raw bandwidth for VOCM control and lower power - essential for DC-accurate, thermally constrained data acquisition systems.

Availability

THS4503CDGNRG4 is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure, instrumentation, and medical imaging systems requiring stable component supply with guaranteed long-term sourcing.

Supply support for THS4503CDGNRG4 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-speed amplifier design and manufacturing.

The THS4503 forms part of TI's precision high-speed amplifier portfolio, engineered specifically for demanding signal-chain applications where linearity, bandwidth, and thermal stability are critical - especially ADC driver and RF receiver roles.

FAQ

What is the maximum recommended junction temperature for continuous operation of the THS4503CDGNRG4?

The THS4503CDGNRG4 must not exceed 60°C junction temperature during continuous operation to prevent low-level oscillation. This requirement mandates proper thermal design: the MSOP-8 PowerPAD™ must be soldered to a minimum 100 mm² copper pour tied to internal ground planes. Derating is required above ambient 55°C, and thermal simulation should confirm TJ < 60°C under worst-case load and airflow conditions for the THS4503CDGNRG4.

Does the THS4503CDGNRG4 support single-supply operation, and what are the constraints?

Yes, the THS4503CDGNRG4 operates from a single 4.5–15 V supply (e.g., +5 V with VS− tied to ground). In this mode, the input common-mode range is 1.3–3.7 V (min), and differential output swing reduces to ±2.6 V into 1 kΩ. VOCM must be biased within this range (e.g., 2.5 V) to center the output. Single-supply use requires careful attention to input signal headroom and output clipping limits - verified in the THS4503CDGNRG4 electrical characteristics table for 5 V operation.

How does the VOCM pin function in the THS4503CDGNRG4, and what happens if left unconnected?

The VOCM pin on the THS4503CDGNRG4 actively controls the DC common-mode level of the differential outputs. When driven with a stable voltage (e.g., 2.5 V), it forces VOUT+ and VOUT− to straddle that value. If left floating, VOCM defaults to ~2.5 V (±0.1 V) in 5 V operation but exhibits increased drift and noise; TI explicitly recommends tying VOCM to a low-impedance source. The THS4503CDGNRG4 datasheet specifies 25 kΩ input impedance and ±4 V input range for this pin.

What is the significance of the 'R' and 'G4' suffixes in THS4503CDGNRG4?

The 'R' denotes tape-and-reel packaging (standard quantity 2500 units), and 'G4' indicates TI's green (lead-free, RoHS-compliant) packaging standard. Both suffixes are orderable identifiers - the 'R' confirms factory-packaged reels suitable for automated SMT assembly, while 'G4' certifies compliance with environmental regulations without performance impact. These markings appear on the THS4503CDGNRG4 device body and shipping documentation.

Can the THS4503CDGNRG4 replace the THS4502CDGNRG4 on the same PCB layout?

Yes - the THS4503CDGNRG4 is pin-compatible with the THS4502CDGNRG4 in the DGN package: Pin 6 is NC on THS4503CDGNRG4 versus PD on THS4502CDGNRG4, but both accept the same footprint and thermal pad. No PCB changes are required; however, the PD trace must be left unconnected or grounded (per layout guidelines) when using THS4503CDGNRG4. All other pins, electrical behavior, and thermal requirements match identically.