Analog Input Specifications - Data Translation DT9837A User Manual

Appendix A

Analog Input Specifications

Table 22
Unless otherwise noted, specifications are typical at 25
Feature
Number of analog input
channels
Resolution
Ranges and gains
Gain of 1:
Gain of 10:
A/D type
Data encoding
Maximum sample rate
Minimum sample rate
Group delay
b
ADC Delta Sigma filter
Passband, –3 dB:
Passband ripple, ±0.005 dB:
Stopband, –100 dB:
b
Analog filter
Low pass cutoff, –3 dB:
High pass cutoff, –3 dB
(AC coupling):
Channel-to-channel
c
crosstalk
Input Signal = 10 kHz:
Input impedance
Coupling
IEPE current source
IEPE compliance voltage
118
lists the specifications for the analog input subsystem on the DT9837 Series modules.
Table 22: Analog Input Subsystem Specifications
DT9837
Specifications
4, single-ended,
simultaneous
24 bits
±10 V
±1 V
Delta Sigma
Offset binary
a
52.734 kHz
195.3 Hz
39/data rate, in
seconds
0.49 x sample
frequency, Hz
0.453 x sample
frequency, Hz
0.547 x sample
frequency, Hz
400 kHz
0.5 Hz
> –110 dB with 50 Ω
termination
> –105 dB with 1 kΩ
termination
d
1 MΩ, 20 pF
AC/DC
(software-selectable
per channel)
4 mA ±0.5%
18 V
°
C.
DT9837A
Specifications
4, single-ended, 4, single-ended,
simultaneous simultaneous
24 bits 24 bits
±10 V ±10 V
±1 V ±1 V
Delta Sigma Delta Sigma
Offset binary Offset binary
a
52.734 kHz 105.469 kHZ
195.3 Hz 195.3 Hz
39/data rate, in 39/data rate, in
seconds seconds
0.49 x sample 0.49 x sample
frequency, Hz frequency, Hz
0.453 x sample 0.453 x sample
frequency, Hz frequency, Hz
0.547 x sample 0.547 x sample
frequency, Hz frequency, Hz
400 kHz 400 kHz
0.1 Hz 0.5 Hz
> –110 dB with 50 Ω
> –110 dB with 50 Ω
termination
termination
> –105 dB with 1 kΩ>
> –105 dB with 1 kΩ
termination
termination
d
1 MΩ, 20 pF 1 MΩ, 20 pF
AC/DC AC/DC
(software-selectable (software-selectable
per channel) per channel)
4 mA ±0.5% 4 mA ±0.5%
18 V 18 V
DT9837B
Specifications Specifications
4, single-ended,
simultaneous
24 bits
±10 V
±1 V
Delta Sigma
Offset binary
a
105.469 kHZ
195.3 Hz
39/data rate, in
seconds
0.49 x sample
frequency, Hz
0.453 x sample
frequency, Hz
0.547 x sample
frequency, Hz
400 kHz
1 Hz
> –110 dB with 50 Ω
termination
> –105 dB with 1 kΩ
termination
d
1 MΩ, 20 pF
AC/DC
(software-selectable
per channel)
2 mA ±0.5%
18 V
DT9837C
a
d