Description

1.2 Description

The TI THS4012 dual high-speed operational amplifier evaluation module (EVM) is a complete dual high-speed amplifier circuit. It consists of the TI THS4012 dual low-noise high-speed operational amplifier IC, along with a small number of passive parts, mounted on a small circuit board measuring approximately 1.9 inch by 2.2 inch (Figure 1±1). The EVM uses standard SMA miniature RF connectors for inputs and outputs and is completely assembled, tested, and ready to use Ð just connect it to power, a signal source, and a load (if desired).

Figure 1±1. THS4012 Evaluation Module

C1

J1

Vin1

±VCC GND +VCC

J2

+C2

+

J3

Vout1

R1

 

R2

R3

 

R4

R5

R6

 

C3

R7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R8

J4

Vin2

C4

 

 

 

 

U1

 

 

 

 

 

 

 

C5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R9

R10

R11

R12

R13

R14

C6

R15

TEXAS

INSTRUMENTS

J5

Vout2

SLOP230

THS4012 EVM Board

Note: The EVM is shipped with the following component locations empty: C3, C6,

R2, R4, R8, R10, R12

Although the THS4012 EVM is shipped with components installed for dual-channel single-ended noninverting operation, it can also be configured for single-channel differential and/or inverting operation by moving components. Noninverting gain is set to 2 with the installed components. The input of each channel is terminated with a 50-Ωimpedance to provide correct line impedance matching. The amplifier IC outputs are routed through 50-Ωresistors both to provide correct line impedance matching and to help isolate capacitive loading on the outputs of the amplifier. Capacitive loading directly on the output of the IC decreases the amplifier's phase margin and can result in peaking or oscillations.

General 1-3

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Texas Instruments THS4012 manual Description, SLOP230

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.