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Products   >   I/O Expansion Modules   >   Analog I/O Modules   >   Diamond-MM-AT Analog I/O Module
16 analog inputs, 12-bit resolution
100KHz max sampling rate
Programmable gain
Interrupt-based A/D data transfer with FIFO support
2 12-bit analog outputs
Programmable analog output range
Multi-range autocalibration for highest accuracy
16 digital I/O lines
+5V only power supply
-40ºC to +85ºC operation
Drop-in upgrade for Diamond-MM
Customers who use this product also use:
50-pin Data Acquisition Cable

This product can be customized and ruggedized. Click here for more information.
See Diamond-MM-AT Analog I/O Module Technical Resources
A/D Board Tutorial
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Diamond-MM-AT Datasheet
(.pdf, 134.6 kb)
Diamond-MM-AT Manual v1.21
(.pdf, 1.4 MB)

Diamond-MM-AT Analog I/O Module

16 Channel, 12-bit Analog I/O with Autocalibration

Diamond-MM-AT Analog I/O Module
click for a larger image
Analog Input Ranges
Analog Output Ranges
Counters and Digital I/O
I/O Header Pinout
A/D Conversion Methods and Rates
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The new Diamond-MM-AT analog I/O module offers autocalibration, programmable gain, A/D FIFO, and extended temperature operation to mid-range 12-bit analog I/O users. All these features are added on top of our existing Diamond-MM architecture at the same price as the original board, to bring you an unbeatable combination of features at this price level.


The 16 12-bit analog input channels feature programmable gains of 1, 2, 4, and 8, as well as programmable unipolar/bipolar range, for a total of 9 different input ranges. Maximum sampling rate is 100KHz (total for all channels), and a new 512-sample FIFO enables the board to operate at full speed in Windows operating systems using interrupts. DMA is no longer required to attain full speed.

Diamond-MM-AT offers 9 different programmable input ranges, including both unipolar and bipolar modes. Single-ended / differential operation is selected with jumpers, as it is with all our analog I/O boards.

Input Range Resolution
0 - 10V 2.44mV
0 - 5V 1.22mV
0 - 2.5V 0.61mV
0 - 1.25V 0.31mV
±10V 4.88mV
±5V 2.44mV
±2.5V 1.22mV
±1.25V 0.61mV
±0.625V 0.31mV

Analog Outputs

The board also has 2 12-bit analog outputs with multiple unipolar and bipolar output ranges. A new programmable output range feature lets you set the output range anywhere between 0V and 10V with 1mV precision in software.

Analog Inputs

Both analog inputs and outputs benefit from our unique multi-range autocalibration process. Multiple on-board precision references are used to calibrate the board in each range, thereby ensuring the highest degree of accuracy. The analog outputs are also fed back to the autocalibration circuit for precise output range calibration as well as user-programmable output ranges.

Counters and Digital I/O

The board also has an on-board counter/timer to control A/D sampling or rate generator functions, 8 digital inputs, and 8 digital outputs. New features enable you to generate hardware interrupts from the counter/timer as well as an external digital signal. And in keeping with our real-world-friendly design, Diamond-MM-AT requires only +5V power supply and operates over the full industrial temperature range of -40 to +85oC.

I/O Header Pinout

Diamond-MM-AT's 50-pin I/O header has the same pinout and the same location as the header on Diamond-MM.

Vin 15 / 7- 1 2 Vin 7 / 7+
Vin 14 / 6- 3 4 Vin 6 / 6+
Vin 13 / 5- 5 6 Vin 5 / 5+
Vin 12 / 4- 7 8 Vin 4 / 4+
Vin 11 / 3- 9 10 Vin 3 / 3+
Vin 10 / 2- 11 12 Vin 2 / 2+
Vin 9 / 1- 13 14 Vin 1 / 1+
Vin 8 / 0- 15 16 Vin 0 / 0+
Analog Ground 17 18 VRef Out
Analog Ground 19 20 Vout 0
Analog Ground 21 22 Vout 1
Analog Ground 23 24 +15V
-15V Output 25 26 VRef In 0
Analog Ground 27 28 VRef In 1
In 0- 29 30 Digital Ground
Out 31 32 Out 2
Digital Out 7 33 34 Digital Out 6
Digital Out 5 35 36 Digital Out 4
Digital Out 3 37 38 Digital Out 2
Digital Out 1 39 40 Digital Out 0
Digital In 7 41 42 Digital In 6
Digital In 5 43 44 Digital In 4
Digital In 3 45 46 Digital In 2/Gate 0
Digital In 1 47 48 Digital In 0/Gate 1/2
+5V 49 50 Digital Ground


Analog Inputs
Number of inputs 8 differential or 16 single-ended (user selectable)
A/D resolution 12 bits (1/4096 of full scale)
Bipolar ranges ±10V, ±5V, ±2.5V, ±1.25V, ±0.625V
Unipolar ranges 0-10V, 0-5V, 0-2.5V, 0-1.25V
Input bias current 3nA max
Max. input voltage ±10V for linear operation
Overvoltage protection ±35V on any analog input
Input Impedance 10^13 ohms
Conversion rate 100,000 samples per second with interrupts
Input FIFO 512 samples, interrupt on half-full
Analog Outputs
Number of outputs 2
D/A resolution 12 bits (1/4096 of full scale)
Output ranges Fixed: ±5V, 0-5V
Programmable: anywhere between 0V and 10V in 1mV increments
Output current ±5mA max per channel
Settling time 4µS max to ±2/2 LSB
Relative accuracy ±1 LSB
Nonlinearity ±1 LSB, monotonic
Reset All channels reset to OV
Digital I/O
Number of inputs 8, HCT/TTL compatible
Input voltage
Logic 0: 0.0V min, 0.8V max
Logic 1: 2.0V min, 5.0V max
Input current ±1µA max
Number of outputs 8, HCT/TTL compatible
Output voltage
Logic 0: 0.0V min, 0.33V max
Logic 1: 3.8V min, 5.0 max
Output current
Logic 0: 64mA max per line
Logic 1: -15mA max per line
A/D Pacer clock 32-bit down counter (2 82C54 counters cascaded)
Clock source 10MHz on-board source or external signal
General purpose 16-bit down counter (1 82C54 counter)
Interrupt trigger End of A/D conversion or scan
Calibration A/D and D/A circuits calibrated under software control
Power supply +5VD±10%@350mA typical
±15V output current ±10mA max with DACs unloaded
Operating temperature -40°C to +85°C Extended
Weight 3.3oz/93
RoHS Compliant

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Diamond-MM-AT Analog I/O Module
available models:
Diamond-MM Autocalibrating 16-ch 12-bit A/D + 2-ch 12-bit D/A Extended Temperature
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Cables and accessories
available models:
50-conductor .1" pitch 18" ribbon cable, Data acquisition Cable
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