Chapter 4 Specifications; Analog Input - Measurement Computing CIO-DAS16/Jr User Manual

Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Analog input

Parameter
A/D converter type
Resolution
Number of channels
Input ranges
Polarity
A/D pacing
A/D trigger sources
A/D triggering modes
Data transfer
DMA
A/D conversion time
Throughput
Absolute accuracy
Differential linearity error
Integral linearity error
Differential linearity error
No missing codes guaranteed
Gain drift (A/D specs)
Zero drift (A/D specs)
Common mode range
CMRR @ 60 Hz
Input leakage current (@ 25
Input impedance
Absolute maximum input voltage
Range
Bipolar (10 V)
Bipolar (5 V)
Bipolar (2.5 V)
Bipolar (1.25 V)
Unipolar (10 V)
Unipolar (5 V)
Unipolar (2.5 V)
Unipolar (1.25 V)
Table 1. Analog input specifications
Specification
AD7800
12 bits
8 differential or 16 single-ended, switch selectable
±10 V, ±5 V, ±2.5 V, ±1.25 V, ±0.625 V, 0 to 10 V, 0 to 5 V, 0 to 2.5 V, 0 to
1.25 V, 0 to 0.625 V, fully programmable
Unipolar/Bipolar, software selectable
Programmable:
internal counter or external source (DIG. IN 0 / TRIGGER, rising edge), or
software polled
External polled gate trigger (DIG. IN 0 / TRIGGER, active high)
Digital: Gated pacer, software polled.
(Gate must be disabled by software after trigger event.)
Interrupt, DMA or software polled
Channel 1 or 3
3 µs
120 kHz typical, PC dependant
0.01% of reading ±1 LSB
±1 LSB
±1 LSB
±1 LSB
12-bits
±25 ppm/°C
±10ppm/°C
±10 V
-72 dB
°
200 nA
C)
10 Meg Ohms min
±35 V
Table 2. Noise distribution (Rate = 1-100 kHz)
Average % ±2 bins
98%
97%
97%
95%
95%
96%
92%
89%
Average % ±1 bin
86%
86%
82%
73%
79%
80%
70%
68%
15
Chapter 4
Average # bins
8 bins
9 bins
8 bins
9 bins
9 bins
9 bins
10 bins
11 bins