Overview
The BUF634T, produced by Texas Instruments, is a high-speed, unity-gain, open-loop buffer designed for a wide range of applications. It is particularly useful for increasing the output current of operational amplifiers, eliminating thermal feedback, and improving capacitive load drive. The device operates with a low quiescent current of 1.5mA and can deliver up to 250mA of continuous output current. It features a high slew rate of 2000V/µs and adjustable bandwidth from 30MHz to 180MHz. The BUF634T is available in various packages, including 5-pin SOIC, 5-pin TO-220, and 5-pin TO-263 surface-mount, making it versatile for different mechanical and power-dissipation requirements.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±2.25 | ±18 | V | |
| Output Current | ±250 | mA | ||
| Slew Rate | 2000 | V/µs | ||
| Bandwidth | 30 | 180 | MHz | |
| Quiescent Current (Low Quiescent Current Mode) | ±1.5 | ±2 | mA | |
| Quiescent Current (Wide Bandwidth Mode) | ±15 | ±20 | mA | |
| Thermal Shutdown Temperature | 175 | °C | ||
| Operating Temperature Range | –40 | 125 | °C | |
| Storage Temperature Range | –55 | 125 | °C |
Key Features
- High output current: up to 250mA
- High slew rate: 2000V/µs
- Pin-selected bandwidth: adjustable from 30MHz to 180MHz
- Low quiescent current: 1.5mA in low quiescent current mode
- Wide supply range: ±2.25V to ±18V
- Internal current limit and thermal shutdown protection
- Available in 5-pin SOIC, 5-pin TO-220, and 5-pin TO-263 surface-mount packages
Applications
- Valve driver
- Solenoid driver
- Op amp current booster
- Line driver
- Headphone driver
- Video driver
- Motor driver
- Test equipment
- ATE pin driver
Q & A
- What is the maximum output current of the BUF634T?
The BUF634T can deliver up to 250mA of continuous output current.
- What is the slew rate of the BUF634T?
The slew rate of the BUF634T is 2000V/µs.
- How can the bandwidth of the BUF634T be adjusted?
The bandwidth can be adjusted from 30MHz to 180MHz by connecting a resistor between V– and the BW pin.
- What is the quiescent current in low quiescent current mode?
The quiescent current in low quiescent current mode is 1.5mA.
- What is the thermal shutdown temperature of the BUF634T?
The thermal shutdown temperature is 175°C.
- What are the available package types for the BUF634T?
The BUF634T is available in 5-pin SOIC, 5-pin TO-220, and 5-pin TO-263 surface-mount packages.
- What is the operating temperature range of the BUF634T?
The operating temperature range is –40°C to 125°C.
- Does the BUF634T have internal protection features?
Yes, the BUF634T has internal current limit and thermal shutdown protection.
- What are some common applications of the BUF634T?
Common applications include valve drivers, solenoid drivers, op amp current boosters, line drivers, headphone drivers, video drivers, motor drivers, test equipment, and ATE pin drivers.
- Is there a newer version of the BUF634T available?
Yes, a newer version of this device is now available: BUF634A.
