Texas Instruments THS4150 manual Description, Evaluation Module Features

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Description

1.1 Description

The THS4150 EVM is a good example of PCB design and layout for high-speed operational amplifier applications. It is a complete circuit for the high-speed operational amplifier. The EVM is made of the THS4150 high-speed operational amplifier, a number of passive components, and various features and footprints that enable the user to experiment, test, and verify various operational amplifier circuit implementations. The board measures 4.5 inches in length by 2.5 inches in width. Initially, this board is populated for a single-ended input amplifier (see Figure 1-2 for populated circuits). The outputs (VO+ and VO±) can be tested differentially or single ended. Gain is set to one and can be changed by changing the ratios of the feedback and gain resistors (see the device datasheet for recommended resistor values). The user may populate various footprints on the evaluation module board to verify filter designs or perform other experiments. Each input is terminated with a 50-Ωresistor to provide correct line-impedance matching.

1.2 Evaluation Module Features

THS4150 high-speed operational amplifier EVM features include:

JVoltage supply operation range: 5-V to ± 15-V operation (see the device data sheet)

JSingle and differential input and output capability

JNominal 50-Ωinput and output termination resistors. They can be configured according to the application requirement.

JVOCM direct input control (see schematic and the device data sheet)

JVOCM pin can be controlled via transformer center-tap (see schematic)

JShutdown pin control, JU1 (if applicable to the device, see the device data sheet)

JInput and output transformer footprints for changing single-ended signals to differential signals

JFootprint for high-precision, balanced feedback and gain resistors (0.01% or better)

JFootprints for low-pass filter implementation (see application note SLOA054A)

JFootprints for antialiasing filter implementation (see application note SLOA054A)

JDifferential probe terminals on input and output nodes for differential probe insertion

JVarious GND and signal test points on the PCB

JCircuit schematic printed on the back of the EVM

JA good example of high-speed amplifier PCB design and layout

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Introduction and Description

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Contents Users Guide Important Notice Preface Trademarks Contents Figures Introduction and Description Evaluation Module Features DescriptionTHS4150 EVM Specifications Schematic of the Populated Circuit Default ConfigurationTHS4150 EVM Schematic ±2. SchematicAdditional Sample Schematics ±5. Vicr Level Shifter THS4150 EVM Layout ±7. Top Layer Silkscreen±9. Internal Plane Layer 2 Ground Plane ±11. Bottom Layer 4 Ground and Signal Introduction and Description Using the THS4150 EVM Power Supply Setup Required EquipmentInput and Output Setup ±2. Signal ConnectionsTesting the EVM Setup ±3. Driver 1 Output SignalPower Down Verification Measuring the Frequency ResponseButterworth Filter Butterworth FilterTHS4150 EVM Bill of Materials ±1. THS4150 EVM Bill of MaterialsP374CTR-ND General High-Speed Amplifier Design Considerations General High-Speed Amplifier Design Considerations

THS4150 specifications

Texas Instruments (TI) is renowned for its innovative analog and mixed-signal technologies, and one of its standout products in the operational amplifier domain is the THS4150. This high-speed, precision, voltage-feedback amplifier has garnered attention in various applications, particularly in high-frequency and low-noise environments.

One of the main features of the THS4150 is its impressive bandwidth. It boasts a bandwidth of 120 MHz, making it suitable for wideband signal amplification in applications like video processing, data conversion, and instrumentation. The amplifier also has a high slew rate of 1600 V/μs, enabling it to respond quickly to rapid signal changes. This characteristic is particularly crucial for applications where maintaining signal integrity is paramount.

The THS4150 operates with a supply voltage range from ±2.5 V to ±9 V, providing flexibility for designers looking to optimize power consumption and performance in battery-operated systems or other sensitive applications. Its low input offset voltage of 0.5 mV ensures accurate signal amplification, making it ideal for precision measurement systems.

Another noteworthy aspect of the THS4150 is its output drive capability. The amplifier can source and sink up to 200 mA of output current, allowing it to drive heavy loads without significant distortion. This feature is beneficial in driving capacitive loads and connecting directly to other stages in an analog signal chain.

In terms of technology, the THS4150 employs TI’s advanced bipolar process, which combines high-speed and low-noise characteristics essential for modern electronics. The amplifier is also designed to minimize power supply rejection, ensuring stable performance even under varying power supply conditions.

The device includes built-in protection features that accommodate various real-world scenarios, such as limited input voltage conditions and short circuits at the output. Consequently, this contributes to its reliability and robustness in demanding applications.

In summary, the Texas Instruments THS4150 is a high-performance voltage-feedback amplifier that stands out due to its wide bandwidth, high slew rate, low offset voltage, and strong output drive capability. These features make it a versatile choice for various applications, including high-speed data acquisition, video signal processing, and low-noise amplification. As designers seek to create sophisticated systems requiring reliable signal integrity and performance, the THS4150 is poised to be an invaluable component in their toolbox.
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