User guide

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21
Pin Function In/Out
1 VCC 5V -
2 Chip Select 0 O
3 Chip Select 1 O
4 Chip Select 2 O
5 Chip Select 3 O
6 Chip Select 4 O
7 Chip Select 5 O
8 DAC Select O
9 TRIG - Scope Trigger O
10 GND -
11 BCD Unit 1 I
12 BCD Unit 2 I
13 BCD Unit 4 I
14 BCD Unit 8 (msb) I
15 BCD Ten 1 I
16 BCD Ten 2 I
17 BCD Ten 4 I
18 BCD Ten 8 (msb) -
19 Osc1 (16mhz crystal) -
20 Osc2 (16mhz crystal) -
21 NC -
22 DMX512 TTL Receive I
23 NC -
24 Good Rx (Open Collector, Lo=Good) O
25 NC -
26 NC -
27 Test (Connect to GND) I
28 BCD Hundred 4 I
29 BCD Hundred 2 I
30 BCD Hundred 1 I
31 GND -
32 MCLR (Connect to VCC) I
33 D7 (msb dac data) O
34 D6 O
35 D5 O
36 D4 O
37 AD3 (msb channel address) O
38 AD2 O
39 AD1 O
40 AD0 O
Pin
Functions
Circuit
Operation
The AL4005 chip selects and address outputs are used to
address a single demultiplex channel from the 96 available.
The Analogue multiplex output is then routed through that
channel to the sample and hold circuit.
The application drawings that follow show this process using
4067 16 channel de-multiplexors and TL084 op-amps. The