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Zircon-MM
Low-Cost 8-bit Analog I/O PC/104 Module
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Description |
Zircon-MM is our entry-level PC/104 module for basic analog I/O applications that don't require high resolution. The 8-bit A/D and D/A converters are adequate for many price-sensitive applications. This cost-effective module offers high-speed (up to 40,000 samples/sec using interrupts) A/D conversions, 24 digital I/O lines, optional counter/timer for A/D conversion timing, external A/D trigger capability, and calibration-free operation
Three Models to Choose From
The basic Zircon-MM-LC has 8 single-ended 8-bit analog inputs, 1 8-bit analog output, unipolar (0-2.5V and 0-1.25V) input and output ranges, and 24 digital I/O lines. The mid-level LC2 version includes a clock oscillator and counter/timer to provide precise on-board control for A/D sampling rates and automatic operation, as well as general purpose counting and timing functions. The full-featured DX model (shown) has all these features plus bipolar input and output ranges, as well as an increased full-scale input swing of 0-5V in unipolar mode and ±5V in bipolar mode.
Low Price, High Quality
At Diamond Systems, low price doesn't mean low quality. Zircon-MM still has a 4-layer circuit board with split analog and digital power and ground planes to minimize the effects of digital noise on the analog circuitry. And all versions require only +5V for operation, to help keep total system costs down.
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Analog I/O Ranges |
Depending on the model, different analog input and output ranges are available.
| Input Range |
Resolution |
Model |
| 0-1.25V |
4.9mV |
1.22 mV |
| 0-2.5V |
9.8mV |
0.61mV |
| 0-5V |
19.5mV |
0.305 mV |
| ±1.25V |
9.8mV |
0.153 mV |
| ±2.5V |
19.5mV |
0.0763 mV |
| ±5V |
39.1mV |
0.061 mV |
| Output Range |
Resolution |
Model |
| 0-1.25V |
4.9mV |
LC, DX |
| 0-2.5V |
9.8mV |
LC, DX |
| ±1.25V |
9.8mV |
DX only |
| ±2.5V |
19.5mV |
DX only |
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Digital I/O |
Zircon-MM includes an 82C55 chip which provides 24 lines of digital I/O. The 82C55 is an industry standard device that allows flexible configuration, including programmable port directions and handshaking capability. All lines have 10KOhm pull-up resistors, and all lines are set to input mode on power-up or system reset.
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Counter/Timer for A/D Pacer Clock |
Models ZMM-LC2 and ZMM-DX have an on-board 4MHz clock oscillator and an 82C54 3-channel counter/timer IC. These models allow you to program the A/D conversion rate and have the board perform conversions automatically, transferring the data to system memory using interrupts. Two counter/timers are combined to provide the A/D timer, and the third counter/timer is available on the I/O header for general purpose use.
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Free Software |
Zircon-MM comes with free driver software compatible with C and Basic languages. Example programs are included to get you started quickly. Some examples of the supported board operations are:
- A/D conversion on single channel
- A/D conversion on multiple channels
- Interrupt-based A/D conversions
- Analog output on single channel
- Analog output on both channels
- Program counter/timers
- Digital input, bit and nibble
- Digital output, bit and nibble
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I/O Header Pinout |
| Vin 7 |
1 |
2 |
Vin 6 |
| Vin 5 |
3 |
4 |
Vin 4 |
| Vin 3 |
5 |
6 |
Vin 2 |
| Vin 1 |
7 |
8 |
Vin 0 |
| Analog Ground |
9 |
10 |
Analog Ground |
| V Out |
11 |
12 |
Analog Ground |
| Analog Ground |
13 |
14 |
Analog Ground |
| +5V Supply Output |
15 |
16 |
-5V Supply Output (ZMM-DX only) |
| Analog Ground |
17 |
18 |
Analog Ground |
| Digital Ground |
19 |
20 |
External Trigger |
| Counters 1 & 2 Gate |
21 |
22 |
Counter 0 In |
| Counter 0 Gate |
23 |
24 |
Counter 0 Out |
| (Digital I/O Lines) A7 |
25 |
26 |
A6 (Digital I/O Lines) |
| A5 |
27 |
28 |
A4 |
| A3 |
29 |
30 |
A2 |
| A1 |
31 |
32 |
A0 |
| C7 |
33 |
34 |
C6 |
| C5 |
35 |
36 |
C4 |
| C3 |
37 |
38 |
C2 |
| C1 |
39 |
40 |
C0 |
| B7 |
41 |
42 |
B6 |
| B5 |
43 |
44 |
B4 |
| B3 |
45 |
46 |
B2 |
| B1 |
47 |
48 |
B0 |
| +5V |
49 |
50 |
Digital Ground |
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Specifications |
| Analog Inputs |
| No./type of channels |
8 single-ended |
| Resolution |
8 bits (1 part in 256) |
| A/D conversion time |
2.6 µs max |
| Max. conversion time |
40 kHz typical, interrupt-based single conversions; 40kHz, single channel; 64 kHz typical, interrupt-based 8-channel scan |
| Relative accuracy |
±1 LSB max |
| Offset error |
±3 LSB max |
| Full-scale error |
1-4, +0 LSB mas |
| Input current |
LC, DX
±300 µA max
±25 µA max |
| Analog Outputs |
| No./type of channels |
1, voltage output |
| Resolution |
8 bits (1 part in 256) |
| Settling time |
4 µs max to ±1/2 LSB |
| Offset error |
±2 LSB max |
| Full-scale error |
±2 LSB max |
| Digital I/O |
| Number of lines |
24 (using 82C55 chip) |
| Direction |
Programmable in 4/8 bit groups |
| Compatibility |
±TTL/CMOS |
| Pull-up resistors |
10KΩ on each I/O line |
| Output current |
±2.5mA max per line |
| Counter/Timers (DX only) |
| No. of counter/timers |
3, 16-bit |
| Compatibility |
TTL/CMOS |
| Max. input frequency |
10MHz |
| On-board osc. |
4MHz |
| Configuration |
Counters 1 and 2 cascaded for interrupts; Counter 0 free |
| General |
| Dimensions |
3.55" x 3.775" (PC/104 standard) |
| Operating temperature |
0 to +70°C, Standard, -40 to +85°C Extended |
| Power supply |
+5VDC ±10% |
| Current consumption: |
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| ZMM-DX |
127mA |
| ZMM-LC (typical, all outputs open) |
100MA |
| Weight |
-LC: 2.7 oz/76g
-DX: 3.0 oz/85g |
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Get an online quote |
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Zircon-MM |
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| Zircon-MM 8-ch 8-bit A/D Unipolar + 1-ch 8-bit D/A Unipolar |
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| Zircon-MM 8-ch 8-bit A/D + 1-ch 8-bit D/A Plus Counter/timers |
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Cables and accessories |
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| 50-conductor .1" pitch 18" ribbon cable Data Acquisition |
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