Texas Instruments THS4502CDGNR

Overview

THS4502CDGNR from Texas Instruments is a high-performance fully differential amplifier with 370 MHz small-signal bandwidth, 2800 V/µs slew rate, and -95 dBc third-order intermodulation distortion at 30 MHz. It features power-down capability, output common-mode voltage control (VOCM), and supports ±5 V or single 5 V supply operation in high-linearity ADC preamplifier applications.

For engineers reviewing the THS4502CDGNR datasheet, THS4502CDGNR pinout, THS4502CDGNR application, or THS4502CDGNR equivalent, key selection criteria include its centered input common-mode range, 51 dBm OIP3 at 30 MHz, thermal oscillation limit of +60°C junction temperature, and MSOP-8 PowerPAD™ package for enhanced thermal dissipation.

Technical Context

The THS4502CDGNR employs a fully differential architecture optimized for signal integrity in high-speed data acquisition systems. Its internal VOCM feedback loop enables precise control of differential output common-mode level independent of gain configuration, while the power-down pin (PD) reduces quiescent current to ≤1.2 mA when asserted.

Designed for wideband analog front-ends, it delivers 14-bit AC performance through 40 MHz with low harmonic distortion (HD2 = -74 dBc, HD3 = -78 dBc at 30 MHz) and maintains >70 dB CMRR across its ±3.4 V input common-mode range under ±5 V supply conditions.

Key Specifications

Pinout & Package

The THS4502CDGNR is housed in an 8-pin MSOP PowerPAD™ package (DGN), where the exposed thermal pad must be soldered to a PCB copper plane for reliable thermal management and to prevent oscillation above +60°C junction temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4503CDGNR and THS4500IDGNR, the THS4502CDGNR uniquely combines power-down control, centered input common-mode range, and ultra-low distortion-making it optimal for battery-powered, high-SFDR data acquisition where thermal management and dynamic power scaling are essential.

Availability

THS4502CDGNR is available at Aetrix Electronics and suitable for high-speed data acquisition systems, wireless baseband receivers, single-ended-to-differential conversion circuits, and active differential line drivers requiring stable component supply across industrial temperature ranges.

Supply support for THS4502CDGNR 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 THS4502CDGNR belongs to TI's high-linearity fully differential amplifier product line, engineered specifically for demanding ADC driver and RF receiver applications where distortion, bandwidth, and thermal stability are critical.

FAQ

What is the maximum junction temperature specification for THS4502CDGNR to prevent oscillation?

The THS4502CDGNR has a maximum die temperature limit of +60°C to prevent low-level oscillation. Operation above this temperature is not recommended for new designs. Thermal design must ensure junction temperature remains below +60°C under worst-case ambient and power dissipation conditions, especially given its 4.7°C/W θJC in the MSOP-8 PowerPAD™ package.

How does the VOCM pin function in THS4502CDGNR, and what is its input impedance?

The VOCM pin on the THS4502CDGNR sets the common-mode voltage of the differential output pair. Its input impedance is 25 kΩ || 1 pF, and it accepts a DC voltage from 1 V to 4 V (single 5 V supply) or ±4 V (dual ±5 V supply). When left floating, VOCM defaults to ~2.5 V, enabling immediate operation without external biasing in many ADC interface configurations.

What are the power-down voltage thresholds for THS4502CDGNR under 5 V supply conditions?

Under 5 V single-supply operation, the THS4502CDGNR enables the amplifier when the PD pin voltage exceeds 2.1 V (minimum) and disables it when PD falls below 0.7 V (maximum). The transition occurs over a 1.4 V window, providing noise margin against false triggering. Power-down quiescent current is guaranteed ≤1200 µA at 85°C.

Can THS4502CDGNR operate with single 5 V supply, and what is its differential output swing in that configuration?

Yes, THS4502CDGNR supports single 5 V supply operation. In this mode, with VOCM = 2.5 V and RL = 1 kΩ, the guaranteed minimum differential output voltage swing is ±2.6 V at TA = 85°C. This allows direct interfacing to mid-scale-referenced 14-bit ADCs such as the ADS4149 without level-shifting circuitry.

What is the small-signal bandwidth of THS4502CDGNR when configured for G = +2 with ±5 V supplies?

When configured for a non-inverting gain of +2 with ±5 V supplies, Rf = 1 kΩ, and RL = 800 Ω, the THS4502CDGNR delivers a typical small-signal bandwidth of 175 MHz. This bandwidth supports wideband applications including IF amplification up to 100 MHz while maintaining <0.1 dB gain flatness out to 150 MHz at unity gain.