Texas Instruments THS4520RGTRG4

Overview

THS4520RGTRG4 from Texas Instruments is a wideband, fully differential amplifier with rail-to-rail outputs, designed for 3.3 V and 5 V data acquisition systems. It delivers 620 MHz small-signal bandwidth, –123 dBc HD3 at 100 kHz (8 V_PP, 1 kΩ), 570 V/μs slew rate, and 2 nV/√Hz input voltage noise - enabling high-fidelity signal conditioning ahead of precision ADCs in test equipment and wireless baseband chains.

For engineers reviewing the THS4520RGTRG4 datasheet, THS4520RGTRG4 pinout, THS4520RGTRG4 application, or THS4520RGTRG4 equivalent, key selection criteria include output common-mode control accuracy (±0.25 mV offset), power-down quiescent current (15 μA), and 0.1% settling time (7 ns) - all critical for low-noise, fast-settling, dc-coupled analog front-ends.

Technical Context

The THS4520RGTRG4 employs a fully differential architecture with independent output common-mode voltage control via dedicated CM pins, allowing precise alignment to ADC reference midpoints without external resistive dividers. Its unity-gain-stable design supports minimum gain of 1 V/V (0 dB) and maintains < ±0.25 mV output common-mode error across 1.25–3.5 V CM input range.

It features dual supply operation (±1.65 V to ±2.5 V), rail-to-rail output swing (up to 8.64 V_DIFF at 5 V), and integrated power-down functionality with logic-controlled PD pin. Harmonic distortion performance is optimized for single-ended input/differential output configurations using 499 Ω feedback networks and 200 Ω differential loads.

Key Specifications

Pinout & Package

THS4520RGTRG4 is housed in a 16-pin QFN package (RGT) with exposed thermal pad, optimized for high-frequency layout and thermal dissipation in compact PCB designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4520RGTRG4, THS4521RGTR offers identical performance in a pin-compatible variant with reduced 3.3 V quiescent current, while LMH5401RTVT trades integrated CM control for extreme bandwidth - making THS4520RGTRG4 optimal for precision, dc-coupled, mid-band differential ADC driving.

Availability

THS4520RGTRG4 is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless baseband transceivers, test and measurement instrumentation, and voice processing systems requiring stable component supply and guaranteed long-term sourcing.

Supply support for THS4520RGTRG4 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The THS4520RGTRG4 belongs to TI's high-speed differential amplifier product line, engineered specifically for precision, low-noise, dc-coupled signal conditioning in data converter interfaces and communication infrastructure.

FAQ

What is the maximum differential output voltage swing of the THS4520RGTRG4 at 5 V supply?

The THS4520RGTRG4 delivers a typical differential output voltage swing of 8.64 V_PP at 5 V supply (±2.5 V) with 100 Ω load to mid-supply, supporting full-scale drive into high-resolution ADCs without clipping. This rail-to-rail capability is confirmed under TA = –40°C to 85°C conditions and aligns with its specified 7.8–8.64 V range in the datasheet.

Does the THS4520RGTRG4 support 3.3 V single-supply operation?

Yes, the THS4520RGTRG4 operates with ±1.65 V supplies (3.3 V total), delivering 600 MHz small-signal bandwidth, 320 V/μs slew rate, and –146 dBc HD3 at 100 kHz (4 V_PP). Its input and output common-mode ranges are optimized for mid-supply referencing, making it suitable for true single-supply 3.3 V data acquisition systems.

How does the output common-mode control function in the THS4520RGTRG4?

The THS4520RGTRG4 uses dedicated CM pins (pins 4 and 9) to set output common-mode voltage, defaulting to mid-supply (0 V with ±2.5 V supplies). When driven externally, it maintains ±0.25 mV typical offset from the applied CM voltage across 1.25–3.5 V range - enabling precise dc coupling to mid-supply-referenced ADCs without external resistors.

What is the power-down behavior of the THS4520RGTRG4?

When the PD pin (pin 12) is pulled low, the THS4520RGTRG4 enters power-down mode with quiescent current reduced to 15 μA (typical). The device remains functional with logic-high or open-circuit PD pin; no external pull-up is required as it defaults to enabled state. Power-down recovery time is not specified but is consistent with standard high-speed amplifier turn-on latency.

Can the THS4520RGTRG4 drive a 200 Ω differential load while maintaining low distortion?

Yes, the THS4520RGTRG4 is characterized for 200 Ω differential loads and achieves –123 dBc HD3 at 100 kHz (8 V_PP) under those conditions. Its 105 mA differential output current drive capability ensures stable operation into 200 Ω loads without gain compression or increased distortion, as verified in TI's SLOS503B datasheet Figures 11–14.