GENERAL DESCRIPTION

The SPT9712 is a 12-bit, 100 MWPS digital-to-analog converter designed for direct digital synthesis, high resolution imaging, and arbitrary waveform generation applications.

This device is pin-for-pin compatible with the AD9712 with significantly improved performance. The only difference between the SPT9712 and the AD9712 is that the Latch Enable (LE, pin 26) for the SPT9712 is rising-edge triggered (see figure 1), whereas the Latch Enable (LE, pin 26) for the AD9712 functions in the transparent mode.

The SPT9712 is an ECL-compatible device. It features a fast settling time of 13 ns and low glitch impulse energy of 15 pV-s, which results in excellent spurious-free dynamic range characteristics.

The SPT9712 is available in a 28-lead PLCC package in the industrial temperature range (–40 to +85 °C).

FEATURES

• 12-Bit, 100 MWPS digital-to-analog converter

• ECL compatibility

• Low power: 600 mW

• 1/2 LSB DNL

• 40 MHz multiplying bandwidth

• Industrial temperature range

• Superior performance over AD9712

   – Improved settling time of 13 ns

   – Improved glitch energy 15 pV-s

   – Master-slave latches

APPLICATIONS

• Fast frequency hopping spread spectrum radios

• Direct sequence spread spectrum radios

• Microwave and satellite modems

• Test & measurement instrumentation