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Zotino

Zotino is a 32-channel, 16-bit DAC EEM with an update rate of 1MSPS (divided between the channels). It was designed for low noise and good stability.

Design files (schematics, PCB layouts, BOMs) can be found at Zotino/releases.

Overview

• Width: 4HP
• Channel count: 32
• Resolution: 16-bit
• Update rate: 1MSPS, which may be divided arbitrarily between the channels
• Analogue bandwidth: 3rd-order Butterworth response with 75kHz cut-off; ?V/s slew-rate
• Output voltage: ±10V
• Output impedance: 470Ohm in parallel with 2.2nF
• DAC: AD5372BCPZ
• EEM connectors: power and digital communication supplied by a single EEM connector.
• Power consumption: 3W without load, 8.7W with max load on all channels.

Measurements and simulations

Temperature stability: To do, but include self-heating. Worst-case OpAmp self-heating is about 25C. At 0.2ppm/C, this is 4ppm, which is fine!

**WIP -- will complete when measurements are made! **

• noise data...
• Add image of transfer function from schematics
• Add image of noise spectrum
• Add images of any measurements

Accessories

• Zotino connects the 32 channels to both (a) a HD68 connector on its front panel and (b) to four IDC connectors on the board.
• HD68-to-HD68 cables are available from various sources.
• At the remote end, the HD68 connection can be broken out to four IDC connectors using HD68-IDC.
• Each IDC connection with 8 channels (either directly from Zotino or from the HD68-IDC board) can be broken out to BNC or MCX using BNC-IDC, or SMA using SMA-IDC. That board can be placed in the same crate as Zotino or remotely together with HD68-IDC.