Texas Instruments THS4502IDGNR

Overview

THS4502IDGNR from Texas Instruments is a high-performance fully differential amplifier with power-down capability, designed 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 under ±5 V supply, enabling 14-bit ADC preamplification up to 40 MHz.

For engineers reviewing the THS4502IDGNR datasheet, THS4502IDGNR pinout, THS4502IDGNR application, or THS4502IDGNR equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed application use cases, and two rigorously cross-checked alternative parts for differential amplifier selection in RF receiver chains, active filtering, and single-ended-to-differential conversion circuits.

Technical Context

The THS4502IDGNR implements a fully differential architecture with centered input common-mode range and independent output common-mode voltage control (VOCM) pin, allowing precise DC offset setting for ADC interface alignment. Its internal topology supports both single-ended and differential inputs while maintaining >70 dB CMRR across temperature.

Power-down functionality is implemented via a dedicated PD pin with defined enable/disable thresholds (≥2.1 V ON, ≤0.7 V OFF under 5 V supply), reducing quiescent current to ≤1.2 mA while preserving input bias current <140 µA and enabling fast turnon/turnoff delays (1000 ns / 800 ns).

Key Specifications

Pinout & Package

The THS4502IDGNR is housed in an 8-pin MSOP PowerPAD™ package (DGN), optimized for thermal dissipation and compact layout in high-density analog signal chains. The exposed thermal pad must be soldered to a PCB copper plane for reliable operation below 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 THS4503IDGNR and ADA4940-1ARZ, the THS4502IDGNR uniquely balances high slew rate (2800 V/µs), integrated power-down, and proven 14-bit linearity-making it optimal for cost-sensitive, high-throughput ADC driver designs requiring dynamic power control.

Availability

THS4502IDGNR is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure transceivers, and precision test equipment requiring stable component supply across industrial temperature ranges (−40°C to +85°C).

Supply support for THS4502IDGNR 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 THS4502IDGNR belongs to TI's high-linearity fully differential amplifier product line, engineered specifically for demanding ADC interface, RF receiver, and precision signal chain applications where distortion, noise, and power efficiency are critical.

FAQ

What is the maximum junction temperature limit for reliable operation of the THS4502IDGNR?

The THS4502IDGNR must not exceed +60°C junction temperature to prevent low-level oscillation; operation above this threshold is not recommended for new designs. Thermal design must ensure the MSOP PowerPAD™ is soldered to a thermally conductive PCB plane, and ambient conditions must be evaluated using θJA = 58.4°C/W to maintain TJ ≤ 60°C under worst-case load and supply conditions. The THS4502IDGNR datasheet specifies derating above +60°C is required.

How does the VOCM pin function in the THS4502IDGNR, and what voltage range is valid?

The VOCM pin on the THS4502IDGNR directly controls the DC common-mode level of the differential outputs. Under 5 V single supply, VOCM accepts 1.3 V to 3.7 V; under ±5 V dual supply, it accepts ±3.4 V. When left floating, VOCM defaults to ~2.5 V (±0.1 V). This feature enables precise alignment of THS4502IDGNR output swing to ADC input requirements without external level-shifting circuitry.

What are the power-down enable and disable voltage thresholds for the THS4502IDGNR?

Under 5 V supply, the THS4502IDGNR PD pin enables the amplifier when voltage is ≥2.1 V and disables it when voltage is ≤0.7 V. In dual-supply mode (±5 V), thresholds shift to ≥−2.9 V (enable) and ≤−4.3 V (disable). These thresholds ensure clean state transitions with hysteresis, and the THS4502IDGNR maintains input bias current <140 µA and turnoff delay <800 ns during power-down.

Can the THS4502IDGNR drive a 50 Ω differential load directly, and what is its output current capability?

Yes-the THS4502IDGNR delivers ≥100 mA differential output current into 20 Ω loads, supporting direct drive of 50 Ω systems via appropriate termination (e.g., 25 Ω series resistors per leg). Its closed-loop output impedance is 0.1 Ω (single-ended), ensuring minimal mismatch-induced reflections. At ±5 V, THS4502IDGNR achieves ±7.4 V differential swing into 1 kΩ, scaling linearly to ~±2.5 V into 50 Ω with proper gain configuration.

What is the small-signal bandwidth of the THS4502IDGNR at G = +2 and G = +5 configurations?

At ±5 V supply, the THS4502IDGNR delivers 175 MHz small-signal bandwidth at G = +2 (Rf = 1 kΩ) and 70 MHz at G = +5 (Rf = 1.3 kΩ), per TI SLOS352E datasheet Section 6.2. These values reflect measured 3 dB points with −20 dBm input and 800 Ω load. Bandwidth scales inversely with gain, preserving a 300 MHz gain-bandwidth product for G > +10, confirming consistent high-frequency performance across gain settings in the THS4502IDGNR family.