D5a
===

.. _d5a_description:

Description
-----------

The D5a module is a 16 channel DC voltage source dedicated to setting gate-voltages on samples. Each channel on the D5a is controlled by the same 18-bit DACs (Digital to Analog converters). 

.. figure:: ./figures/FrontD5a.png
    :height: 600px
    :align: left
    :alt: A D5a voltage module.

On the front of each D5a module you find:

- **16 x MCX**: DC voltage source with software-selectable range (±4, ±2, +4 V), 18-bit resolution, 550 Ohm output impedance with a 100 KHz low-pass filter. The compliance current is ±7.3 mA.
- **1 x switch**: Switch to ramp all outputs down to zero volts.


Specifications
--------------

Output characteristics
^^^^^^^^^^^^^^^^^^^^^^

+-----------------------------+---------------+-----------------------+--------------------+
| Parameter                   | Value         | Units                 | Conditions         |
+=============================+===============+=======================+====================+
| Analog channels             | 16            |                       | MCX connectors     | 
+-----------------------------+---------------+-----------------------+--------------------+
| Range                       | ±4, ±2, +4    | V                     |                    |   
+-----------------------------+---------------+-----------------------+--------------------+
| Compliance current          | ±7.3          | mA                    |                    |
+-----------------------------+---------------+-----------------------+--------------------+
| Impedance                   | 550           | Ω                     |                    |
+-----------------------------+---------------+-----------------------+--------------------+

Static performance
******************

+----------------------------------+---------------+-----------------------+--------------------+
| Parameter                        | Value         | Units                 | Conditions         |
+==================================+===============+=======================+====================+
| Resolution (vertical)            | 18            | bit                   |                    |
+----------------------------------+---------------+-----------------------+--------------------+
| Differential Non-Linearity (DNL) | ±0.2          | LSB                   | Typical value      |
+----------------------------------+---------------+-----------------------+--------------------+
| Integral Non-Linearity (INL)     | ±0.5          | LSB                   | Typical value      |
+----------------------------------+---------------+-----------------------+--------------------+

Dynamic performance
*******************

+-----------------------------+---------------+-----------------------+--------------------+
| Parameter                   | Value         | Units                 | Conditions         |
+=============================+===============+=======================+====================+
| Noise                       | <70           | nV/√Hz @ 2 Hz         | Measured into high |
|                             +---------------+-----------------------+ impedance with     | 
|                             | <30           | nV/√Hz @ 100 Hz       | ±4 V range         |
+-----------------------------+---------------+-----------------------+--------------------+
| Drift                       | 0.7           | ppm/°C of range       | Measured into high |
|                             +---------------+-----------------------+ impedance with     |
|                             | 1.5           | ppm/°C of output      | ±4 V range         |
+-----------------------------+---------------+-----------------------+--------------------+
| Wideband Noise              | <0.5          | μVrms                 | 0.1-10 Hz, measured|
|                             |               |                       | into high impedance|
|                             |               |                       | with ±4 V range    |
+-----------------------------+---------------+-----------------------+--------------------+

Miscellaneous
^^^^^^^^^^^^^

+-----------------------------+----------------------+----------------+--------------------+
| Parameter                   | Value                | Units          | Conditions         |
+=============================+======================+================+====================+
| Power consumption           | 1.04                 | W              | No load            |
|                             +----------------------+----------------+--------------------+ 
|                             | 1.76                 | W              | All shorted        |
|                             |                      |                | @ max output       |
+-----------------------------+----------------------+----------------+--------------------+
| Dimensions                  | 35.3 x 128.7 x 182   | mm³            |                    |
+-----------------------------+----------------------+----------------+--------------------+
| Weight                      | 0.360                | kg             |                    |
+-----------------------------+----------------------+----------------+--------------------+