Overview
The LMH6643MAX/NOPB, produced by Texas Instruments, is a high-performance, low-power operational amplifier. This device is part of the LMH664X family, which includes single, dual, and quad amplifier configurations. The LMH6643 specifically is a dual operational amplifier, offering high speed, low distortion, and exceptional output current capabilities. It is designed to operate over a wide supply voltage range from 2.7 V to 12.8 V, making it versatile for various industrial and commercial applications.
Key Specifications
| Parameter | Typical Value | Unit | Conditions |
|---|---|---|---|
| −3 dB Bandwidth (BW) | 130 MHz | AV = +1, VOUT = 200mVPP | |
| Supply Voltage Range | 2.7 V to 12.8 V | ||
| Total Harmonic Distortion (THD) | −62 dBc | 5 MHz, RL = 2 kΩ, VO = 2 VPP, AV = +2 | |
| Settling Time | 68 ns | ||
| Overdrive Recovery | 100 ns | ||
| Slew Rate | 100 V/µs | AV = −1, VI = 2 VPP | |
| Input Offset Voltage (VOS) | ±3.4 mV | For LMH6643 | |
| Common Mode Rejection Ratio (CMRR) | ≥50 dB | VCM stepped from 0 V to 3.5 V | |
| Output Short Circuit Protection | Infinite for VS < 6 V at room temperature | Allowable short circuit duration is 1.5 ms for VS > 6 V |
Key Features
- High speed with a −3 dB bandwidth of 130 MHz at a gain of +1
- Low total harmonic distortion (THD) of −62 dBc at 5 MHz
- Fast settling time of 68 ns and overdrive recovery of 100 ns
- High output current capability of approximately 75 mA
- No output phase reversal with common-mode voltage range (CMVR) exceeded
- Output short circuit protection with infinite duration for VS < 6 V at room temperature
- Professional quality video performance with low differential gain and phase characteristics
- Available in various packages including SOIC, VSSOP, and TSSOP
Applications
- Active filters for various supplies
- CD/DVD ROM applications
- ADC buffer amplifiers
- Portable video applications
- Current sense buffer applications
Q & A
- What is the typical bandwidth of the LMH6643?
The typical bandwidth of the LMH6643 is 130 MHz at a gain of +1.
- What is the supply voltage range for the LMH6643?
The supply voltage range for the LMH6643 is from 2.7 V to 12.8 V.
- What is the total harmonic distortion (THD) of the LMH6643?
The total harmonic distortion (THD) of the LMH6643 is −62 dBc at 5 MHz.
- What is the settling time of the LMH6643?
The settling time of the LMH6643 is 68 ns.
- Does the LMH6643 have output short circuit protection?
Yes, the LMH6643 has output short circuit protection with infinite duration for VS < 6 V at room temperature and 1.5 ms for VS > 6 V.
- What are some common applications for the LMH6643?
Common applications include active filters, CD/DVD ROM, ADC buffer amplifiers, portable video, and current sense buffer applications.
- What is the slew rate of the LMH6643?
The slew rate of the LMH6643 is approximately 100 V/µs at a gain of −1 and input voltage of 2 VPP.
- What is the input offset voltage (VOS) of the LMH6643?
The input offset voltage (VOS) of the LMH6643 is typically ±3.4 mV.
- What is the common mode rejection ratio (CMRR) of the LMH6643?
The common mode rejection ratio (CMRR) of the LMH6643 is greater than or equal to 50 dB.
- In what packages is the LMH6643 available?
The LMH6643 is available in SOIC, VSSOP, and TSSOP packages.
