Overview
The Texas Instruments LMH6553SDE/NOPB is a high-performance 900 MHz fully differential amplifier designed with an integrated adjustable output limiting clamp. This amplifier is particularly well-suited for driving analog-to-digital converters (ADCs) and offers exceptional bandwidth, distortion, and noise performance. The integrated clamp feature provides transient over-voltage protection, safeguarding low-voltage ADC inputs from being overdriven and damaged by large input signals. This makes the LMH6553SDE/NOPB an ideal choice for various demanding applications including automotive, communication, medical, test and measurement, video, and LIDAR systems.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Number of channels | 1 | Total supply voltage (min) (V) | 4.5 |
| Total supply voltage (max) (V) | 12 | BW at Acl (MHz) | 900 |
| Acl, min spec gain (V/V) | 1 | Slew rate (typ) (V/µs) | 2300 |
| Architecture | Current FB, Fully Differential ADC Driver | Vn at flatband (typ) (nV√Hz) | 1.2 |
| Iq per channel (typ) (mA) | 29 | Rail-to-rail | No |
| Operating temperature range (°C) | -40 to 125 | Iout (typ) (mA) | 120 |
| 2nd harmonic (dBc) | 79 | 3rd harmonic (dBc) | 90 |
| Frequency of harmonic distortion measurement (MHz) | 20 | GBW (typ) (MHz) | 900 |
| Input bias current (max) (pA) | 2000000 | CMRR (typ) (dB) | 82 |
| Package | WSON-8-EP(2.5x3) | RoHS Status | Compliant |
Key Features
- 900 MHz −3 dB Small Signal Bandwidth: High bandwidth suitable for high-speed applications.
- Integrated Adjustable Output Limiting Clamp: Provides transient over-voltage protection and safeguards low-voltage ADC inputs.
- Low Harmonic Distortion: −79 dB THD @ 20 MHz and −92 dB IMD3 @ f_c= 20 MHz.
- Fast Settling Time: 10 ns settling time to 0.1% and 600 ps clamp overdrive recovery time.
- Ultra-Low Latency: 30ns latency, ideal for high-speed data transfer.
- Low EMI Radiation: Minimized electromagnetic interference.
- Flexible Configuration: Can be configured as either a differential input to differential output or single-ended input to differential output gain block.
Applications
- Automotive Systems: Suitable for high-speed and high-reliability applications in the automotive sector.
- Communication Systems: Ideal for communication systems requiring high bandwidth and low distortion.
- Medical Systems: Used in medical equipment that demands high precision and reliability.
- Test and Measurement Systems: Suitable for high-speed oscilloscope front ends and other test equipment.
- Video and LIDAR Systems: Used in video processing and LIDAR applications requiring high-speed data handling.
Q & A
- Q: What is the primary function of the LMH6553SDE/NOPB amplifier?
A: The LMH6553SDE/NOPB is a 900 MHz fully differential amplifier with an integrated adjustable output limiting clamp, primarily used for driving ADCs and providing transient over-voltage protection.
- Q: What are the key benefits of the integrated output limiting clamp?
A: The clamp protects low-voltage ADC inputs from being overdriven, reduces the need for external discrete overload protection networks, and ensures fast overdrive recovery.
- Q: What is the bandwidth of the LMH6553SDE/NOPB amplifier?
A: The amplifier has a 900 MHz −3 dB small signal bandwidth and a 670 MHz −3 dB large signal bandwidth at A_V = 1.
- Q: What are the typical harmonic distortion and intermodulation distortion values?
A: The amplifier has a −79 dB THD @ 20 MHz and −92 dB IMD3 @ f_c= 20 MHz.
- Q: What is the settling time and clamp overdrive recovery time of the LMH6553SDE/NOPB?
A: The settling time is 10 ns to 0.1%, and the clamp overdrive recovery time is 600 ps.
- Q: What are the operating temperature and supply voltage ranges of the LMH6553SDE/NOPB?
A: The operating temperature range is −40°C to 125°C, and the supply voltage range is 4.5V to 12V.
- Q: In what packages is the LMH6553SDE/NOPB available?
A: The amplifier is available in 8-pin SO PowerPAD and 8-pin WSON packages.
- Q: How can the LMH6553SDE/NOPB be configured?
A: It 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.
- Q: What types of applications is the LMH6553SDE/NOPB suitable for?
A: It is suitable for automotive, communication, medical, test and measurement, video, and LIDAR applications.
- Q: How does the LMH6553SDE/NOPB minimize electromagnetic interference (EMI)?
A: The amplifier is designed to minimize EMI radiation, making it suitable for applications where low EMI is critical.
