Texas Instruments THS4502CDRG4

Overview

THS4502CDRG4 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. It is used as a high-linearity ADC driver in 14-bit, 80 MSps data acquisition systems.

For engineers reviewing the THS4502CDRG4 datasheet, THS4502CDRG4 pinout, THS4502CDRG4 application, or THS4502CDRG4 equivalent, key selection criteria include differential output drive capability (±7.4 V swing into 1 kΩ), VOCM-controlled output common-mode setting, thermal derating above +60°C junction temperature, and compatibility with high-speed SAR and pipeline ADC front-ends.

Technical Context

The THS4502CDRG4 implements a fully differential architecture optimized for wideband signal conditioning. Its centered input common-mode range (±3.4 V at ±5 V supply) enables direct interfacing with precision DACs and ADCs without level-shifting. The internal VOCM buffer allows precise control of output common-mode voltage independent of gain configuration.

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). The device exhibits low input voltage noise (6.8 nV/√Hz) and maintains OIP3 of 52 dBm at 30 MHz - critical for wireless receiver IF amplification and high-fidelity analog signal chains.

Key Specifications

Pinout & Package

THS4502CDRG4 is packaged in an 8-pin SOIC (D package) with exposed thermal pad (PowerPAD™), rated for 0°C to 70°C operation. The SOIC-D footprint enables compatibility with standard automated assembly processes while providing enhanced thermal performance over non-PowerPAD variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4502CDRG4, THS4503CDRG4 removes power-down capability but retains identical linearity and bandwidth, while THS4502IDRG4 extends operational temperature range without altering electrical behavior - both maintain pin compatibility and SOIC-D footprint.

Availability

THS4502CDRG4 is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure, and precision instrumentation requiring stable component supply and TI-qualified commercial-grade performance.

Supply support for THS4502CDRG4 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 delivering analog and embedded processing solutions with emphasis on precision, reliability, and signal integrity.

The THS4502 product line delivers ultra-low-distortion fully differential amplifiers targeting high-resolution ADC/DAC interfaces and RF signal conditioning in communications and test equipment.

FAQ

What is the maximum junction temperature limit for reliable operation of the THS4502CDRG4?

The THS4502CDRG4 must not exceed +60°C junction temperature during continuous operation to prevent low-level oscillation. This thermal constraint is explicitly specified in the datasheet's "Maximum Die Temperature to Prevent Oscillation" section. Operation above this threshold risks instability, especially under high-output-current conditions. Designers must use the θJA = 97.5°C/W (SOIC-D) value with proper PCB copper pour and thermal vias to ensure safe thermal margin.

How does the VOCM pin function in the THS4502CDRG4, and what voltage range is supported?

The VOCM pin on the THS4502CDRG4 directly sets the common-mode voltage of the differential output pair. When driven with a stable DC voltage, it establishes the midpoint between VOUT+ and VOUT−. Under 5 V single supply, VOCM accepts 1.2 V to 3.7 V input and produces corresponding output common-mode levels; under ±5 V supply, it supports ±4 V input. The VOCM buffer has 25 kΩ input impedance and 180 MHz bandwidth, enabling fast closed-loop DC offset correction.

Does the THS4502CDRG4 support single-supply operation, and what are the key constraints?

Yes, the THS4502CDRG4 supports single-supply operation from 4.5 V to 15 V. At 5 V supply, its input common-mode range is 1.3 V to 3.7 V, and differential output swing is ±2.6 V into 1 kΩ. Critical constraints include ensuring VOCM is biased within valid range (e.g., 2.5 V typical), using appropriate input coupling, and maintaining adequate headroom for output swing - unlike dual-supply mode, single-supply operation restricts input signal excursion near rails.

What is the power-down behavior of the THS4502CDRG4, and how quickly does it respond?

The THS4502CDRG4 enters low-power state when the PD pin voltage falls below 0.7 V (max) under 5 V supply, reducing quiescent current to ≤1.2 mA. Turnoff delay is ≤800 ns; turnon delay is ≤1000 ns. During power-down, input bias current drops to ≤140 µA and output becomes high-impedance. This behavior enables precise timing control in burst-mode data acquisition systems without external switching circuitry.

Can the THS4502CDRG4 drive a 50 Ω load directly, and what is its output current capability?

The THS4502CDRG4 is not designed for direct 50 Ω termination. Its specified differential output current drive is ≥100 mA into 20 Ω (at ±5 V, 85°C), but sustained 50 Ω loading risks thermal overload and violates recommended operating conditions. For 50 Ω systems, use external series resistors (e.g., 392 Ω + 50 Ω) as shown in the datasheet application circuit, or add a dedicated line-driver buffer stage to preserve linearity and stability.