Texas Instruments Using the THS4012 EVM With Differential Inputs, THS4012 EVM Specifications

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Using the THS4012 EVM With Differential Inputs

1.8 Using the THS4012 EVM With Differential Inputs

The THS4012 EVM operates from power-supply voltages ranging from ± 5 V to ± 15 V. Move resistors on the board as detailed above for either noninverting or inverting operation to configure the EVM for differential input operation. Signal inputs on the module are terminated for 50-Ωnominal source impedance. An oscilloscope is typically used to view and analyze the EVM output signal.

1)Ensure that all power supplies are set to OFF before making power supply connections to the THS4012 EVM.

2)Connect the power supply ground to the module terminal block (J2) location marked GND.

3)Select the operating voltage for the EVM and connect appropriate split power supplies to the module terminal block (J2) locations marked ±VCC and +VCC.

4)Connect an oscilloscope across the module SMA output connectors (J3 and J5) through a 50-Ωnominal impedance cable (an oscilloscope having a 50-Ωinput termination is preferred for examining very high frequency

signals).

5)Set the power supply to ON.

6)Connect the differential signal input across the module SMA input con- nectors (J1 and J4)

The differential EVM input is terminated with an equivalent 50-Ωimpedance for each input. With a 50-Ωsource impedance, the voltage seen by the THS4012 amplifier IC on the module will be ￿ the source signal voltage applied to the EVM. This is due to the voltage division between the source impedance and the EVM equivalent input resistance.

7) Verify the differential output signal on the oscilloscope.

The signal shown on an oscilloscope with a 50-Ωinput impedance will be º the actual THS4012 amplifier IC output voltage. This is due to the voltage division between the output resistors (R7, R15) and the oscilloscope input impedance.

1.9 THS4012 EVM Specifications

Supply voltage range, ± VCC

± 5 V to ± 15 V

Supply current, ICC

. . . 17 mA typ

Input voltage, VI

. . ± VCC, max

Output drive, IO

. . . . . . 90 mA

For complete THS4012 amplifier IC specifications and parameter measurement information, and additional application information, see the THS4012 data sheet, TI Literature Number SLOS216.

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General

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Contents Users Guide Important Notice Preface Page Contents Figures General Feature Highlights Description SLOP230THS4012 EVM Noninverting Operation Noninverting Gain +1 RF +1 R6 and 1 R14General Using the THS4012 EVM In The Noninverting Mode ±3. THS4012 EVM Schematic Ð Inverting Operation THS4012 EVM Inverting OperationInverting Gain +±RF +±R6 and ±R14 Using the THS4012 EVM In The Inverting Mode THS4012 EVM Differential Input Differential Input, Noninverting OperationDifferential Input, Inverting Operation R4±RT General Using the THS4012 EVM With Differential Inputs THS4012 EVM Specifications10 THS4012 EVM Performance ±6. THS4012 EVM Frequency Response with Gain =General High-Speed Amplifier Design Considerations General PowerPAD Design Considerations ±8. PowerPAD PCB Etch and Via Pattern±9. Maximum Power Dissipation vs Free-Air Temperature General General Reference THS4012 EVM Complete Schematic ±1. THS4012 EVM SchematicTHS4012 Dual High-Speed Operational Amplifier EVM Parts List THS4012 EVM Board Layouts ±3. THS4012 EVM PC Board Layout ± Component Side ±4. THS4012 EVM PC Board Layout ± Back Side

THS4012 specifications

The Texas Instruments THS4012 is a high-performance, dual-channel operational amplifier designed for a wide variety of applications requiring high speed and precision. This op-amp is particularly appreciated in the fields of signal processing, data acquisition, and instrumentation, thanks to its exceptional characteristics and innovative technologies.

One of the standout features of the THS4012 is its ultra-low input noise and high slew rate, which make it a compelling choice for applications that demand rapid response times without signal distortion. With a slew rate of up to 1200 V/µs, the THS4012 can handle rapid changes in input signals, making it ideal for high-frequency applications such as analog-to-digital converters and RF signal processing.

In terms of performance, the THS4012 boasts a wide bandwidth of approximately 100 MHz at a gain of 1, ensuring it can efficiently transmit fast signals without significant loss. The part also provides a high common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR), enhancing its stability in environments with fluctuating power supply conditions or varying signal levels.

Another important aspect of the THS4012 is its low total harmonic distortion (THD), which is crucial for high-fidelity applications. By minimizing distortions, it ensures that the output signal closely matches the input signal, preserving the integrity of the original waveform. This makes it especially suitable for audio applications and precision data acquisition systems.

The THS4012 operates on a single or dual power supply, with a voltage range from ±2.5 V to ±6 V, providing designers with the flexibility to integrate this op-amp into various circuit configurations. The device is available in compact packages, making it suitable for space-constrained designs in portable electronics.

Additionally, the THS4012 incorporates innovative features such as internal compensation, which simplifies the design process by reducing the need for external components. This enhances design efficiency and reliability, allowing engineers to focus on other critical aspects of their circuits.

In conclusion, the Texas Instruments THS4012 dual operational amplifier combines high-speed performance, low distortion, and flexible power supply options, making it a popular choice for engineers looking to enhance the capabilities of their electronic systems. Its advanced technologies and characteristics render it a strong option in a myriad of applications within today's demanding electronic landscape.
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