Zmod DAC

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Zmod DAC
SYZYGY-compatible Dual-channel 14-bit Digital-to-Analog Converter Module
Channel Type
Output Range
±1.25V (Low Range)
±5V (High Range)
Absolute Resolution
167μV (Low Range)
665μV (High Range)
±0.2% of Range (Typical)
Output Impedance
Sample Rate
100MS/s (Real Time)
Max AC Amplitude
Analog Bandwidth
40 MHz @ 3dB
20 MHz @ 0.5dB
14 MHz @ 0.1dB
Slew Rate
180V/μs (2V Step)
SYZYGY™ Compatibility
Syzygy 1.1
Syzygy DNA 1.1
Compatibility Table
45 mm
70 mm

The Digilent Zmod DAC, is an open-source hardware SYZYGY™ 1) compatible pod containing a dual-channel DAC and the associated front end. The Zmod DAC is intended to be used with any SYZYGY™ compatible carrier board having the required capabilities.

Figure 1. Zmod DAC top and bottom views.

The analog outputs can be connected to a circuit using SMA cables. Driven by the SYZYGY™ carrier, the Zmod DAC can generate two simultaneous signals (50Ω, ±5V, single-ended, 14-bit, 100MS/s, 40MHz+ bandwidth).

The Zmod DAC was designed to be a piece in a modular, HW and SW open-source ecosystem. Combined with a SYZYGY™ carrier, other SYZYGY™ compatible pods, Zmod DAC can be used for a variety of applications: data acquisition systems, closed loop controllers, etc.

This document describes the Zmod DAC's circuits, with the intent of providing a better understanding of its electrical functions, operations, and a more detailed description of the hardware’s features and limitations. It is not intended to provide enough information to enable complete duplication of the Zmod DAC, but can help users to design custom configurations for programmable parts in the design.


Compatible Digilent Host Boards


These tutorials step through the process of creating a hardware platform that supports the Zmod ADC 1410. Prebuilt images for the Eclypse Z7 are available on the Digilent GitHub. The process of working with these prebuilt images is documented in Section 2 of the Zmod Base Library User Guide.

Additional Resources