Overview
The LMH6554LE/NOPB is a high-performance, fully differential amplifier designed by Texas Instruments. This device is part of the LMH™ high-speed amplifier family and is fabricated in TI's advanced complementary BiCMOS process. The LMH6554 is optimized to provide exceptional signal fidelity and wide large-signal bandwidth, making it ideal for driving 8- to 16-bit high-speed data acquisition systems. It features a proprietary differential current mode input stage architecture, which allows for unity gain and a small-signal bandwidth of 2.8 GHz without compromising response flatness, bandwidth, harmonic distortion, or output noise performance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Small-Signal Bandwidth | 2.8 GHz | |
| Large-Signal Bandwidth (2 VPP) | 1.8 GHz | |
| 0.1 dB Gain Flatness | 830 MHz | |
| OIP3 at 150 MHz | 46.5 dBm | |
| HD2/HD3 at 75 MHz | –96 / –97 dBc | |
| Input Noise Voltage | 0.9 nV/√Hz | |
| Input Noise Current | 11 pA/√Hz | |
| Slew Rate | 6200 V/μs | |
| Power Consumption | 260 mW | |
| Typical Supply Current | 52 mA | |
| Package Type | 14-Lead UQFN |
Key Features
- High-performance fully differential amplifier with unity gain and small-signal bandwidth of 2.8 GHz.
- Proprietary differential current mode input stage architecture for exceptional signal fidelity.
- Low-impedance differential output designed to drive ADC inputs and intermediate filter stages.
- Delivers 16-bit linearity up to 75 MHz when driving 2-V peak-to-peak into loads as low as 200 Ω.
- Available in a space-saving 14-lead UQFN package.
- Operates at gains greater than unity without sacrificing response flatness, bandwidth, harmonic distortion, or output noise performance.
Applications
- Differential ADC Driver: Ideal for driving 8- to 16-bit high-speed data acquisition systems.
- Single-Ended to Differential Converter: Supports conversion from single-ended to differential signals.
- High-Speed Differential Signaling: Suitable for high-speed differential signaling applications.
- IF/RF and Baseband Gain Blocks: Used in intermediate frequency (IF) and radio frequency (RF) as well as baseband gain blocks.
- SAW Filter Buffer/Driver: Can be used as a buffer or driver for surface acoustic wave (SAW) filters.
Q & A
- What is the small-signal bandwidth of the LMH6554?
The small-signal bandwidth of the LMH6554 is 2.8 GHz.
- What is the large-signal bandwidth of the LMH6554 at 2 VPP?
The large-signal bandwidth at 2 VPP is 1.8 GHz.
- What is the OIP3 at 150 MHz for the LMH6554?
The OIP3 at 150 MHz is 46.5 dBm.
- What are the HD2 and HD3 values at 75 MHz for the LMH6554?
The HD2 and HD3 values at 75 MHz are –96 dBc and –97 dBc, respectively.
- What is the input noise voltage of the LMH6554?
The input noise voltage is 0.9 nV/√Hz.
- What is the slew rate of the LMH6554?
The slew rate is 6200 V/μs.
- What is the typical supply current of the LMH6554?
The typical supply current is 52 mA.
- In what package is the LMH6554 available?
The LMH6554 is available in a 14-lead UQFN package.
- What are some common applications of the LMH6554?
Common applications include differential ADC drivers, single-ended to differential converters, high-speed differential signaling, IF/RF and baseband gain blocks, and SAW filter buffers/drivers.
- What is the maximum operating junction temperature for the LMH6554?
The maximum operating junction temperature is 150 °C.
