Overview
The THS4131IDGNG4, part of the THS413x family, is a high-speed, low-noise, fully differential input/output amplifier produced by Texas Instruments. These amplifiers are fabricated using Texas Instruments' state-of-the-art, high-voltage, complementary bipolar process. The THS413x series offers a true fully differential signal path from input to output, providing excellent common-mode noise rejection and low total harmonic distortion. This design is particularly beneficial for high-voltage differential signal chains, enhancing headroom and dynamic range without the need for additional amplifiers.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Bandwidth | 170 MHz | VCC = ±15 V, G = 1 V/V |
| Slew Rate | 51 V/µs | |
| Gain Bandwidth Product | 215 MHz | |
| Total Harmonic Distortion (THD) | –102 dBc at 2 VPP, 250 kHz | |
| Voltage Noise | 1.25 nV/√Hz input-referred noise | |
| 1/f Voltage Noise Corner | 350 Hz | |
| Single Supply Operating Range | 5 V to 30 V | |
| Quiescent Current (Shutdown) | 860 µA (THS4130) | PD = –5 V, TA = 25°C |
| Temperature Range | –40°C to +85°C | |
| Packages | PowerPAD™ HVSSOP-8, SOIC-8, VSSOP-8 |
Key Features
- High performance with a bandwidth of 170 MHz and a slew rate of 51 V/µs
- Low noise characteristics, including 1.25 nV/√Hz input-referred noise and a 1/f voltage noise corner of 350 Hz
- Excellent common-mode noise rejection performance (95 dB at 800 kHz)
- Wide single supply operating range from 5 V to 30 V
- Low quiescent current in shutdown mode (860 µA for THS4130)
- Integrated power-down feature with an active low power-down pin
- Thermal pad for improved thermal performance in HVSSOP package
Applications
- Single-ended to differential conversion
- Differential ADC driver
- Differential antialiasing
- Differential transmitter and receiver
- Output level shifter
- Medical ultrasound systems
Q & A
- What is the bandwidth of the THS4131 amplifier?
The bandwidth of the THS4131 amplifier is 170 MHz when VCC = ±15 V and G = 1 V/V.
- What is the slew rate of the THS4131?
The slew rate of the THS4131 is 51 V/µs.
- What is the total harmonic distortion (THD) of the THS4131?
The THD of the THS4131 is –102 dBc at 2 VPP, 250 kHz.
- What is the input-referred noise of the THS4131?
The input-referred noise of the THS4131 is 1.25 nV/√Hz.
- What is the operating temperature range of the THS4131?
The operating temperature range of the THS4131 is –40°C to +85°C.
- What packages are available for the THS4131?
The THS4131 is available in PowerPAD™ HVSSOP-8, SOIC-8, and VSSOP-8 packages.
- How does the power-down feature work on the THS4131?
The power-down feature is activated via an active low power-down pin. When the pin is pulled to VCC–, the device enters a high-impedance state.
- What are some common applications of the THS4131?
The THS4131 is commonly used in single-ended to differential conversion, differential ADC drivers, differential antialiasing, differential transmitter and receiver, output level shifting, and medical ultrasound systems.
- How should the power supplies be connected and decoupled for the THS4131?
The power supplies should be connected through pins 3 (VCC+) and 6 (VCC–), and each supply pin should be decoupled to GND with a low-inductance, surface-mount ceramic capacitor of approximately 10 nF.
- What precautions should be taken during system power-on sequencing?
Careful planning of system power-on sequencing is necessary to avoid undesirable signal transients and potential damage to ADC inputs when an ADC is used in the application.
