Texas Instruments THS4502IDGKR

Overview

THS4502IDGKR 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 - enabling 14-bit ADC preamplification up to 40 MHz in wireless receiver chains and active filtering applications.

For engineers reviewing the THS4502IDGKR datasheet, THS4502IDGKR pinout, THS4502IDGKR application, or THS4502IDGKR equivalent, this device is selected for demanding analog front-ends requiring centered input common-mode range, output common-mode voltage control (VOCM), and low-distortion differential drive under ±5 V or single 5 V supply.

Technical Context

The THS4502IDGKR employs a fully differential architecture with symmetrical input and output stages, supporting both single-ended-to-differential and differential-to-differential conversion. Its VOCM input enables precise setting of output common-mode voltage independent of gain configuration, critical for interfacing with modern ADCs.

It features an integrated power-down pin (PD) that reduces quiescent current to ≤1.2 mA while maintaining high-impedance inputs and outputs. Thermal derating is required above +60°C junction temperature to prevent low-level oscillation, per TI's Maximum Die Temperature specification.

Key Specifications

Pinout & Package

The THS4502IDGKR is housed in an 8-pin MSOP PowerPAD™ package (DGK), optimized for thermal dissipation and compact PCB layout. The exposed thermal pad must be soldered to a copper plane for reliable operation at full performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4503IDGKR, THS4502IDGKR adds power-down control at no AC performance trade-off; compared with THS4502IDGNR, it delivers superior thermal management via PowerPAD, enabling full 120 mA output drive at elevated ambient temperatures.

Availability

THS4502IDGKR is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure, and precision instrumentation requiring stable component supply across extended temperature ranges (–40°C to +85°C).

Supply support for THS4502IDGKR 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 energy efficiency.

The THS4502IDGKR belongs to TI's high-speed differential amplifier product line, engineered specifically for ultra-linear signal conditioning in data converter interfaces and communication systems.

FAQ

What is the maximum junction temperature limit for reliable operation of the THS4502IDGKR?

The THS4502IDGKR must not exceed +60°C junction temperature during continuous operation to prevent low-level oscillation, as specified in TI's Maximum Die Temperature to Prevent Oscillation section. While absolute maximum TJ is 150°C, long-term reliability requires limiting steady-state TJ to ≤125°C, and functional stability mandates ≤60°C for oscillation-free performance. Thermal design must account for θJA = 260°C/W in the DGK package.

How does the VOCM pin function in the THS4502IDGKR, and what voltage range is supported?

The VOCM pin on the THS4502IDGKR sets the common-mode voltage of the differential outputs (VOUT+ and VOUT−) with 0.98–1.02 V/V gain accuracy. With ±5 V supply, VOCM accepts 1.3 V to 3.7 V (min) at 85°C; with 5 V single supply, it accepts 1.2 V to 3.7 V. When left floating, VOCM defaults to ~2.5 V (±0.1 V), enabling immediate operation without external biasing in many ADC interface configurations.

Can the THS4502IDGKR operate from a single 5 V supply, and what performance changes occur?

Yes, the THS4502IDGKR operates from a single 5 V supply with verified performance: small-signal bandwidth drops to 320 MHz (vs 370 MHz at ±5 V), slew rate reduces to 1300 V/µs, and differential output swing is ±2.6 V (min) referenced to 2.5 V. Harmonic distortion degrades slightly (e.g., IMD3 = –74 dBc at 30 MHz), but remains sufficient for 12–13 bit systems. VOCM functionality remains fully operational.

What is the purpose of the PowerPAD in the THS4502IDGKR's DGK package, and how should it be implemented?

The PowerPAD in the THS4502IDGKR's DGK package is an exposed thermal pad on the underside of the IC that serves as the primary heat dissipation path. It must be soldered to a dedicated PCB copper plane with ≥4 thermal vias (0.3 mm diameter) connecting to inner-layer ground planes. Failure to thermally connect the PowerPAD risks exceeding maximum junction temperature, especially at full output current (120 mA), leading to instability or permanent damage.

How does the power-down feature of the THS4502IDGKR affect input/output behavior during disable?

When the PD pin is driven below 0.7 V (max), the THS4502IDGKR enters power-down mode: quiescent current drops to ≤1200 µA, inputs present ≥50 kΩ || 1 pF impedance, and outputs go to high-impedance state with <±100 mV residual voltage. Turnoff delay is 800 ns typical; turnon delay is 1000 ns. No latch-up or back-drive risk exists, making it safe for dynamic power cycling in multi-channel systems.