Overview
The LMH3401IRMST, produced by Texas Instruments, is a high-performance, 7-GHz ultra-wideband, fixed-gain, fully-differential amplifier. This device is optimized for radio frequency (RF), intermediate frequency (IF), or high-speed, time-domain applications. It is particularly suited for dc- or ac-coupled applications that require single-ended to differential conversion, especially when driving an analog-to-digital converter (ADC). The LMH3401 generates very low levels of second-order and third-order distortion, making it ideal for applications such as test and measurement, broadband communications, and high-speed data acquisition.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bandwidth | 7 GHz | |
| –3-dB Bandwidth | 7 GHz | |
| Fixed Single-Ended to Differential Voltage Gain | 16 dB | |
| Noise Figure at 200 MHz (RS = 50 Ω) | 9 dB | |
| Slew Rate | 18,000 V/µs | |
| Supply Current | 55 mA | |
| Supply Voltage Range | 3.3 V to 5.0 V | |
| Operating Temperature Range | –40°C to 85°C | |
| Package Type | 14-lead UQFN | |
| Second-Order Harmonic Distortion (HD2) at 10 MHz | –96 dBc | |
| Third-Order Harmonic Distortion (HD3) at 10 MHz | –102 dBc |
Key Features
- Excellent single-ended to differential conversion performance from DC to 2 GHz.
- 7-GHz, –3-dB bandwidth.
- Low levels of second-order and third-order distortion (HD2 and HD3) across various frequencies.
- Best-in-class OIP3 performance to 2 GHz.
- Fixed single-ended to differential voltage gain of 16 dB.
- Noise figure of 9 dB at 200 MHz (RS = 50 Ω).
- Slew rate of 18,000 V/µs.
- Supports single-supply or split-supply operation.
- Powered-down feature for power savings.
- On-chip resistors simplify PCB implementation and enhance performance.
- Common-mode reference input pin to align amplifier output common-mode with ADC input requirements.
Applications
- Test and measurement equipment.
- Broadband communications.
- High-speed data acquisition.
- GSPS ADC drivers.
- ADC drivers for high-speed data acquisition.
- ADC driver for 1-Gbps Ethernet over microwave.
- DAC buffers.
- Wideband gain stages.
- Single-ended to differential conversions.
- Level shifters.
Q & A
- What is the bandwidth of the LMH3401?
The LMH3401 has a 7-GHz, –3-dB bandwidth.
- What is the slew rate of the LMH3401?
The slew rate of the LMH3401 is 18,000 V/µs.
- What are the typical supply voltage ranges for the LMH3401?
The LMH3401 can operate with supply voltages between 3.3 V and 5.0 V.
- Does the LMH3401 support single-supply or split-supply operation?
Yes, the LMH3401 supports both single-supply and split-supply operation.
- What is the noise figure of the LMH3401 at 200 MHz?
The noise figure of the LMH3401 at 200 MHz is 9 dB (RS = 50 Ω).
- What are the typical applications of the LMH3401?
The LMH3401 is typically used in test and measurement, broadband communications, high-speed data acquisition, and as GSPS ADC drivers.
- What is the operating temperature range of the LMH3401?
The operating temperature range of the LMH3401 is –40°C to 85°C.
- Does the LMH3401 have a power-down feature?
Yes, the LMH3401 has a power-down feature for power savings.
- What is the package type of the LMH3401?
The LMH3401 is available in a 14-lead UQFN package.
- How does the LMH3401 handle second-order and third-order harmonic distortion?
The LMH3401 generates very low levels of second-order and third-order distortion (HD2 and HD3) across various frequencies.
