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DNR-AI-207
DNR-AI-207
16-channel, 18-bit, 1 kS/s per channel, analog input, data acquisition board for the PowerDNR RACKtangle®
 
The DNR-AI-207 is a 16-channel A/D board featuring 16 differential input channels, 18-bit resolution, and 12 software selectable input ranges. Each channel may be sampled at up to 16 kS/s, though the maximum board throughput is 16 kS/s so applications monitoring multiple channels will reduce the per channel sample rate (e.g. 1 kS/S for 16 channels, 2 kS/S for 8 channels, etc.). Additionally, the DNx-AI-207 provides a dedicated CJC channel that can be used for reading from the built-in CJC sensor on the DNA-STP-AI-U or AI-207TC terminal panels. When used with DNA-STP-AI-U or 207TC panel, the DNR-AI-207 layer also features a direct connection to RTDs or thermocouples (with open TC detection). The software included will perform all required RTD/TC linearization and CJC compensation and return data in °C or °F if desired.

Another key feature of the DNx-AI-207 is the oversampling engine, allowing the board to automatically acquire as many samples as possible for the given gain/speed and average them, thus dramatically improving the noise floor.
 
Characteristics:
  • 16 differential channels
  • Additional dedicated CJC channel
  • Maximum sampling rate of 1kHz per channel
  • 18-bit resolution
  • ±10V input range
  • Gains - 1, 2, 4, 8, 10, 20, 40, 80, 100, 200, 400, 800
  • Overvoltage protection (-40V to +55V)
  • Direct Inputs for thermocouples (with DNA-STP-AI-U panel)
  • Embedded averaging engine
 
Technical Specifications
Parameter
Number of channels: 16 fully differential plus
1 single-ended dedicated CJC channe
Programmable DIO line 1 (external trigger)
ADC resolution 18 bits
Sampling rate 1 S/s - 16 kS/s per channel;
16 kS/s max aggregate for entire board
FIFO size 512 samples
Input bias current ±5nA max, ±0.5nA typical
Input impedance 10MΩ
Gains 1,2,4,8,10,20,40,80,100,200,400,800
Frontend bandwidth 48kHz @ -3dB
Common mode rejection 100dB typical
Oversampling ratio 2 to 8192, selected automatically
Accuracy ±287.59 µV at ±10 V input range. Please see 
table on page 3 for other ranges. (Typical test 
results also depicte on pages two and three.)
Isolation 350 Vrms
Overvoltage protection -40V to +55V
Power consumption 1.4W (stand-by); 2.2W max
Operating temp. (tested) -40°C to +85°C
Operating humidity 95%, non-condencing
Vibration IEC 60068-2-6 5 g, 10-500 Hz, sinusoidal
IEC 60068-2-64 5 g (rms), 10-500Hz, broadband random
Shock IEC 60068-2-27 50 g, 3 ms half sine, 18 shocks @ 6 orientations
30 g, 11 ms half sine, 18 shocks @ 6 orientations
MTBF 637,000 hours