CLC503

Comlinear CLC503 180MHz, Differential-Output Amplifier August 1996 N Comlinear CLC503 180MHz, Differential-Output Amplifier General Description The Comlinear CLC503 is a single-ended to differential amplifier. It utilizes a pair of closed-loop transconductance amplifiers to provide wideband, high fidelity, differential output signals. Internal resistors set the differential gain to 2V/V. With a ground-centered 2Vpp input signal, the CLC503 will produce a 4Vpp differential output signal. This differential output signal is centered around an adjustable common mode voltage. An independent input controls the common mode output voltage. The CLC503 has harmonic distortion products of -77dBc or less, and a signal to noise ratio of 72dB. The output stage is optimized for loads with signal ranges between +0.7 and +3.9 volts, such as those found on single supply CMOS ADCs. Overdrive recovery time of the CLC503 and following circuitry is optimized by the output limiting of the CLC503. The power down pin (PDN) allows for power savings in applications where unused circuitry is placed in a low power mode. The CLC503 is an ideal amplifier to drive the differential inputs of the Comlinear CLC949, 12-bit, 20MSPS, analog-to-digital converter. It is tailored for driving single supply, differential input, analog-to-digital converters which require fast settling, high fidelity inputs. Features s s s s -77dBc distortion (10MHz, 4Vpp) 72dB SNR (4Vpp) 15ns settling (0.1%) 180MHz bandwidth Single...