Texas Instruments THS4130IDGNRG4

Overview

THS4130IDGNRG4 from Texas Instruments is a fully differential input/output amplifier optimized for high-speed, low-noise signal conditioning in precision analog front-ends. It delivers 170 MHz small-signal bandwidth, 51 V/µs slew rate, –102 dBc THD at 250 kHz, and 1.25 nV/√Hz input voltage noise, operating from ±2.5 V to ±15 V supplies. It serves as a differential ADC driver in medical ultrasound systems requiring wide dynamic range and high common-mode noise rejection.

For engineers reviewing the THS4130IDGNRG4 datasheet, THS4130IDGNRG4 pinout, THS4130IDGNRG4 application, or THS4130IDGNRG4 equivalent, key selection criteria include its active power-down capability (PD pin), HVSSOP-8 thermal performance (RθJB = 30.0 °C/W), differential output impedance control, VOCM pin flexibility for level shifting, and verified distortion performance across supply voltages up to ±15 V.

Technical Context

The THS4130IDGNRG4 implements a true fully differential signal path with matched internal gain stages and a dedicated VOCM input that directly sets output common-mode voltage-enabling precise DC level control without external resistive dividers. Its architecture supports both single-ended-to-differential conversion and differential-in/differential-out operation with >95 dB CMRR at 800 kHz.

It features an active-low power-down pin (PD) referenced to VCC–, enabling shutdown quiescent current of 0.86 mA while placing outputs in high-impedance state (>1 MΩ). The device uses TI's high-voltage complementary bipolar process, supporting rail-to-rail output swing (±11.2 V at ±15 V supply) and maintaining stability with 10 pF+ capacitive loads when series output resistors are applied.

Key Specifications

Pinout & Package

HVSSOP-8 package (DGN) with exposed thermal pad electrically isolated from die; requires connection to large copper plane for RθJB = 30.0 °C/W thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4130IDGNRG4, THS4131IDGN trades power-down functionality for lower input bias current, while LMH5401RTVT sacrifices noise performance and VOCM flexibility for ultra-wide bandwidth-making THS4130IDGNRG4 optimal for precision, power-aware differential signal chains below 200 MHz.

Availability

THS4130IDGNRG4 is available at Aetrix Electronics and suitable for medical ultrasound systems, high-resolution data acquisition, industrial sensor interfaces, and RF test equipment requiring stable component supply across extended temperature ranges (–40°C to +85°C).

Supply support for THS4130IDGNRG4 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-performance amplifiers and data converters.

The THS413x product line was designed specifically for demanding differential signal conditioning tasks-including ADC/DAC interfacing, ultrasound front-ends, and instrumentation-where low distortion, wide bandwidth, and configurable common-mode control are essential.

FAQ

What is the function of the VOCM pin on the THS4130IDGNRG4?

The VOCM pin on the THS4130IDGNRG4 sets the DC common-mode voltage of the differential output pair (VOUT+ and VOUT–). Applying a stable voltage-such as 2.5 V for a 5-V ADC reference-directly configures the output midpoint without external resistor dividers. A 0.1-µF bypass capacitor is recommended to minimize noise coupling, and the pin must be driven from a low-impedance source to maintain accuracy. This feature is integral to the THS4130IDGNRG4's role in precision ADC driver applications.

Does the THS4130IDGNRG4 support single-supply operation?

Yes, the THS4130IDGNRG4 operates from a single 5-V to 30-V supply, as confirmed in Section 7.3 of the datasheet. In single-supply mode, VCC– connects to ground, and VOCM is typically biased to mid-rail (e.g., 2.5 V for 5-V supply) to enable full-swing differential output. The device maintains 170 MHz bandwidth and –102 dBc THD under these conditions, making the THS4130IDGNRG4 suitable for portable and industrial systems without dual-rail supplies.

How does the power-down feature work on the THS4130IDGNRG4?

The THS4130IDGNRG4 uses an active-low PD pin referenced to VCC–: pulling PD ≤1.4 V above VCC– disables the amplifier and reduces quiescent current to 0.86 mA. An internal 250-kΩ pull-up to VCC+ keeps the device active if PD is left unconnected. During shutdown, outputs enter high-impedance state (>1 MΩ), preventing loading of downstream circuitry. This behavior is explicitly characterized for the THS4130IDGNRG4 in Section 8.4.1 and Figure 8-3 of the datasheet.

What package type is used for the THS4130IDGNRG4, and why does it matter?

The THS4130IDGNRG4 uses the HVSSOP-8 (DGN) package with an exposed thermal pad. This package achieves RθJB = 30.0 °C/W-nearly 2× better than SOIC-8 (126.3 °C/W)-enabling reliable operation at higher power dissipation levels. The thermal pad must be soldered to a large copper plane for effective heat transfer. This thermal advantage is critical for the THS4130IDGNRG4 in continuous high-output applications like ultrasound Doppler signal chains.

Can the THS4130IDGNRG4 drive capacitive loads, and what precautions are needed?

Yes, the THS4130IDGNRG4 can drive capacitive loads ≥10 pF, but requires a series resistor (≥20 Ω) at each output to maintain stability and prevent ringing, as detailed in Section 9.1.2. This isolation resistor compensates for reduced phase margin caused by capacitive loading. For 50-Ω systems, a 50-Ω series resistor provides both stability and impedance matching. These guidelines apply specifically to the THS4130IDGNRG4 and are validated in Figure 9-1 and related characterization data.