Overview
The LMH6642MFX, produced by Texas Instruments, is a high-speed, low-power operational amplifier that belongs to the LMH664X family. This single-supply voltage feedback amplifier is renowned for its high speed (130 MHz), low distortion (−62 dBc), and exceptionally high output current (approximately 75 mA). It is designed to operate at low cost and reduced power consumption, making it ideal for various industrial and commercial applications.
The device features a wide input common mode voltage range, extending 0.5V below V− and 1V from V+, and an output voltage range that extends to within 40 mV of either supply rail. This makes it particularly suitable for low-voltage applications. The amplifier also boasts a fast output slew rate of 130 V/µs, ensuring large peak-to-peak output swings even at higher speeds.
Key Specifications
| Parameter | Value |
|---|---|
| −3 dB Bandwidth (AV = +1) | 130 MHz |
| Supply Voltage Range | 2.7 V to 12.8 V, ±1.35 V to ±6.4 V |
| Slew Rate (AV = −1) | 130 V/µs |
| Supply Current (no load) | 2.7 mA/amp |
| Output Short Circuit Current | +115 mA to +145 mA |
| Linear Output Current | ±75 mA |
| Input Common Mode Voltage Range | 0.5 V below V−, 1 V from V+ |
| Output Voltage Swing | 40 mV from Rails |
| Input Voltage Noise (100 kHz) | 17 nV/√Hz |
| Input Current Noise (100 kHz) | 0.9 pA/√Hz |
| THD (5 MHz, RL = 2 kΩ, VO = 2 V PP, AV = +2) | −62 dBc |
| Settling Time | 68 ns |
| Operating Temperature Range | −40°C to 85°C |
| Package | SOT-23-5 |
Key Features
- High speed: 130 MHz bandwidth and 130 V/µs slew rate.
- Low distortion: −62 dBc THD at 5 MHz.
- High output current: Approximately 75 mA, suitable for driving heavy loads.
- Rail-to-rail output: Output voltage range extends to within 40 mV of either supply rail.
- Wide input common mode voltage range: Extends 0.5V below V− and 1V from V+.
- Low power consumption: 2.7 mA supply current per amplifier.
- Output short circuit protection and no output phase reversal with CMVR exceeded.
- Fast settling time: 68 ns.
- Professional quality video performance with low differential gain (0.01%) and differential phase (0.01°) characteristics.
Applications
The LMH6642MFX is versatile and suitable for a variety of applications, including:
- ADC buffer applications due to its fast settling time and low distortion.
- High-frequency filter applications.
- Video amplification with professional quality differential gain and phase characteristics.
- Industrial and commercial applications requiring high speed, low distortion, and high output current.
- Low-voltage applications where the wide dynamic range is beneficial.
Q & A
- What is the bandwidth of the LMH6642MFX?
The LMH6642MFX has a bandwidth of 130 MHz.
- What is the slew rate of the LMH6642MFX?
The slew rate of the LMH6642MFX is 130 V/µs.
- What is the supply voltage range for the LMH6642MFX?
The supply voltage range is from 2.7 V to 12.8 V, and ±1.35 V to ±6.4 V.
- What is the maximum output current of the LMH6642MFX?
The maximum output current is approximately ±75 mA.
- What is the input common mode voltage range for the LMH6642MFX?
The input common mode voltage range extends 0.5V below V− and 1V from V+.
- Does the LMH6642MFX have output short circuit protection?
- What is the settling time of the LMH6642MFX?
The settling time is 68 ns.
- What are the typical applications for the LMH6642MFX?
The LMH6642MFX is typically used in ADC buffer applications, high-frequency filter applications, video amplification, and various industrial and commercial applications.
- What is the operating temperature range for the LMH6642MFX?
The operating temperature range is from −40°C to 85°C.
- What is the package type for the LMH6642MFX?
The package type is SOT-23-5.
