NeuroNexus Technologies, Inc. ©2014 | 655 Fairfield Court, Suite 100, Ann Arbor, Michigan USA
CONNECTIONS
Analog and Digital Inputs and Outputs
DB50 PIN
1
2
TTLIN2
3
TTLIN3
TTLIN4
4TTLIN5
TTLIN6
TTLIN7
TTLIN9
TTLIN8
SIGNAL
TTLIN10
TTLIN11
TTLIN12
TTLIN13
TTLIN14
TTLIN15
ADC4
ADC3
ADC5
5
6
7
8
9
10
11
12
13
14
15
16
17
ADC6
ADC7
ADC8
TTLOUT2
TTLOUT3
TTLOUT4
TTLOUT6
TTLOUT5
TTLOUT7
TTLOUT8
TTLOUT9
TTLOUT10
TTLOUT11
TTLOUT12
TTLOUT14
TTLOUT13
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
DAC3
DAC4
DAC5
DAC6
DAC7
DAC8
GND
ADC Clock Signal
+3.3 V
-3.3 V DAC
+3.5 V
+5 V
GND
GND
GND
GND
TTLOUT15
DB50 PIN SIGNAL
The SmartBox™features a total of 16 digital inputs, 16 digital outputs, 8
ADC inputs, and 8 DAC outputs. While two channels for each of these
are located for easy interfacing on the box itself, the remaining 40 inputs
and outputs are wired to a DB-50 female socket on the back panel (see
below).
The 16-bit, 0-5 V ADC inputs may be used to sync external analog signals,
e.g. sync auditory signal with acquired neural signal. The 0-5 V digital in-
puts may be used to sync external TTL signals, such as light pulses for op-
togenetics or lever press in behavioral experiments, with acquired data.
The 16-bit, -3.3 V - +3.3 V DAC outputs allow the user to reconstruct
acquired digital signals back to analog for monitoring on an oscilloscope
or acquisition in LabVIEW. Channels routed to these DAC outputs can be
selected in software. The 0-5 V digital outputs can be used to drive exter-
nal devices (NOTE: this feature is not currently supported by software).
8 digital output lines serve as low-latency threshold comparators that
operate on signals routed to the DAC outputs.
To interface with additional I/Os via the DB-50 connector, users are rec-
ommended to purchase a DB-50 breakout board such as the BRKDD50M
offered by Winford Engineering (http://www.winfordeng.com/products/
brkdd50.php).
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