210-MHz, 250-mA high-speed buffer

The BUF634A device

is a high-performance, high-fidelity, open-loop buffer that

is capable of driving 250 mA of output current. The BUF634A

is a 36-V device with an adjustable bandwidth of 35 MHz to

210 MHz, which is accomplished by varying the value of an

external resistor between the V– and BW pins.

The BUF634A device can be used as a

standalone open-loop driver, or used inside the feedback

loop of a precision op amp to provide both high-precision

and large output current drive with improved capacitive load

drive.

For low-power

applications, the BUF634A device operates on a 1.5-mA

quiescent current with a 250-mA output, 3750-V/µs slew rate,

and 35-MHz bandwidth. The device consumes 8.5-mA quiescent

current in wide-bandwidth mode with a 210-MHz bandwidth. The

BUF634A is fully protected by an internal current limit in

its output stage and by thermal shutdown, making the device

rugged and easy to use.

The BUF634A device

is rated to function over the extended industrial

temperature range of –40°C to +125°C. The BUF634A comes in

three packages: D (SOIC), DRB (VSON), and DDA (HSOIC). The

DRB (VSON) and DDA (HSOIC) packages have excellent thermal

performance resulting from the thermal pad on the bottom

side. The DRB package comes in a very small form factor of

3.0 mm × 3.0 mm, making the device a very suitable option

for portable and size-constrained applications.