Suitable for electro-optical modules such as bias control

Analog Devices (ADI) has released a pair of highly integrated 16-channel DACs that significantly reduce the footprint of wired communication systems without compromising performance.

The 12-bit AD5767 and 16-bit AD5766 are fully integrated devices that support full-band biasing for medium-to-long distance optical communication systems. These devices are integrated through an extensive array of various discrete components to provide the necessary voltage range and additional system functions in a very small space.

AD5767 and AD5766 are suitable for electro-optical functions, such as bias control including Mach-Zehnder modulator-bias control, or for optical modules.

The AD5767 and AD5766 are available in 4×4mm WLCSP and 6×6mm LFCSP packages to save board space. Both products provide unipolar and bipolar output voltage ranges starting from a user-supplied reference voltage of 2.5V.

The voltage can be adjusted from a minimum of -20V to a maximum of +14V. The output buffer can deliver or draw up to 20mA, while the DAC can apply low-frequency dithering to these outputs if necessary, eliminating the need for external circuitry. An output multiplexer is integrated, so if desired, you can monitor each of the 16 channels individually.

The AD5766 is compatible with the AD5767 in pins and footprint and supports the same functions, but also provides 16-bit performance suitable for applications requiring additional resolution. Both the AD5767 and AD5766 utilize a general-purpose 4-wire serial interface supporting clock speeds of up to 50 MHz in write mode, which is compatible with Serial Peripheral Interface (SPI), QSPI™, MICROWIRE™, and DSP interface standards. Both products can operate over a temperature range of -40°C to +105°C, offering a wide range of applications.