Overview
The LMH6552MA/NOPB is a high-performance, fully differential amplifier designed by Texas Instruments. This device is optimized to provide exceptional signal fidelity and wide large-signal bandwidth, making it ideal for driving 8-bit to 14-bit high-speed data acquisition systems. The LMH6552 utilizes Texas Instruments' proprietary differential current mode input stage architecture, allowing it to operate at gains greater than unity without compromising response flatness, bandwidth, harmonic distortion, or output noise performance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bandwidth at AV=1 | 1.5 GHz | |
| Bandwidth at AV=4 | 800 MHz | |
| 0.1 dB Flatness Bandwidth | 450 MHz | |
| Slew Rate | 3800 V/µs | |
| Settling Time to 0.1% | 10 ns | |
| Total Harmonic Distortion (THD) at 20 MHz | -90 dB | |
| Total Harmonic Distortion (THD) at 70 MHz | -74 dB | |
| Enable/Shutdown Pin Time | 20 ns | |
| Operating Temperature Range | -40 to 85 °C | |
| Total Supply Voltage | 4.5 V to 12 V | |
| Input Bias Current (Max) | 8 nA | |
| Output Current (Typ) | 80 mA | |
| Common Mode Rejection Ratio (CMRR) | 70 dB (Min), 80 dB (Typ) | |
| Package Type | SOIC, WSON |
Key Features
- High-performance, fully differential amplifier with 1.5 GHz bandwidth at AV=1.
- Proprietary differential current mode input stage architecture for operation at gains greater than unity without compromising performance.
- Configurable as either differential input to differential output or single-ended input to differential output gain block using external gain set resistors and integrated common mode feedback.
- AC- or DC-coupled input capability.
- High slew rate of 3800 V/µs and fast settling time of 10 ns to 0.1%.
- Low total harmonic distortion (THD) of -90 dB at 20 MHz and -74 dB at 70 MHz.
- 20-ns enable/shutdown pin for quick power management.
- Operates over a wide supply voltage range of 4.5 V to 12 V.
- Available in 8-pin SOIC and thermally enhanced 8-pin WSON packages.
Applications
- High-speed data acquisition systems for 8-bit to 14-bit analog-to-digital converters (ADCs).
- Communication systems requiring high signal fidelity and bandwidth.
- High-speed oscilloscope front ends.
- Other applications where high-performance, fully differential amplification is necessary.
Q & A
- What is the bandwidth of the LMH6552 at a gain of 1?
The LMH6552 has a bandwidth of 1.5 GHz at a gain of 1 (AV=1).
- What is the slew rate of the LMH6552?
The slew rate of the LMH6552 is 3800 V/µs.
- Can the LMH6552 be configured as a single-ended input to differential output amplifier?
Yes, the LMH6552 can be configured as either a differential input to differential output or single-ended input to differential output gain block using external gain set resistors and integrated common mode feedback.
- What is the operating temperature range of the LMH6552?
The operating temperature range of the LMH6552 is -40 to 85 °C.
- What are the available package types for the LMH6552?
The LMH6552 is available in 8-pin SOIC and thermally enhanced 8-pin WSON packages.
- What is the typical output current of the LMH6552?
The typical output current of the LMH6552 is 80 mA.
- How does the LMH6552 perform in terms of total harmonic distortion (THD)?
The LMH6552 has a total harmonic distortion (THD) of -90 dB at 20 MHz and -74 dB at 70 MHz.
- Can the LMH6552 be AC- or DC-coupled at the input?
Yes, the LMH6552 can be AC- or DC-coupled at the input, making it suitable for a wide range of applications.
- What is the typical common mode rejection ratio (CMRR) of the LMH6552?
The typical common mode rejection ratio (CMRR) of the LMH6552 is 80 dB, with a minimum of 70 dB.
- Is the LMH6552 suitable for high-speed oscilloscope front ends?
Yes, the LMH6552 is suitable for high-speed oscilloscope front ends due to its high bandwidth and low distortion characteristics.
