Out in Front: September 12, 1996
A
pair of high-gain, low-current transistors for operation as high as 2.4 GHz
comes in a tiny, six-lead surface-mount package. The AT-32063 from
Hewlett-Packard contains two npn silicon, bipolar transistor chips in a 2×1.25×0.9-mm
SOT-363 package. In contrast, 2.9×1.3×0.93-mm SOT-143 and SOT-23
packages commonly contain just one transistor. Applications include low-voltage,
power-constrained receivers; low-noise stages; mixers; and oscillators.
Although the package pinout targets the common cascode configuration, you can use the two transistors separately. At 900 MHz, they have 1.3-dB noise figure and 14-dB gain in a typical design. With a 2.7V supply and 20-mA current, output power is 12 dBm (P1dB). The transistors operate from 1 to 5V supplies and with supply currents as low as 1 mA, making the transistors suitable for single-battery-cell operation. The AT-32063 costs $0.73 (1000).
—by Bill Schweber
Hewlett-Packard Co, Palo Alto, CA. (800) 537-7715, http://www.hp.com.