Keithley KPCI-3110, User Manual

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A-2 Specifications KPCI-3110 and KPCI-3116 User’s Manual
Table A-1 lists the specifications for the A/D subsystem on the KPCI-3110 and KPCI-3116
boards.
Table A-1
A/D subsystem specifications
Feature KPCI-3110 Specifications KPCI-3116 Specifications
Number of analog input channels
Single-ended/
pseudo-differential:
Differential:
32
16
Number of gains 4 (1, 2, 4, 8)
Resolution 12 bits 16 bits
Data encoding
Bipolar:
Unipolar:
Offset binary
Binary
System accuracy (full-scale)
Gain = 1:
Gain = 2:
Gain = 4:
Gain = 8:
0.03%
0.04%
0.05%
0.05% 0.01%
0.02%
0.02%
0.03%
Nonlinearity (integral) ±1.0 LSB ±2.0 LSB
Differential linearity ±0.75 LSB (no missing codes)
Range
Bipolar:
Unipolar:
±10V
0 to 10V
Drift
Zero:
Gain:
±30
µ
V + (+15
µ
V * Gain)/
°
C
±30 ppm/
°
C
±20
µ
V + (+10
µ
V * Gain)/
°
C
±25 ppm/
°
C
Input impedance
Off:
On:
100M
Ω,
10pF
100M
Ω,
200pF
100M
Ω,
10pF
100M
Ω,
200pF
Input bias current ±20nA
Common mode voltage ±11V maximum (operational)
Maximum input voltage ±20V maximum (protection)
A/D converter noise 0.3 LSB rms 0.5 LSB rms
Amplifier input noise 15.0
µ
V rms + (20
µ
V rms * gain)
20.0pA rms (current)
Channel-to-channel offset ±40.0
µ
V ±30.0
µ
V
Channel acquisition time 1
µ
s to 0.05% 4
µ
s to 0.01%
A/D conversion time 0.8
µ
s 4.0
µ
s
Effective number of bits @
1kHz sine wave, 2 channels:
10kHz sine wave, 2 channels:
sine wave, 2 channels:
11.7 bits typical
(1 MS/s aggregate rate)
11.6 bits typical
(1 MS/s aggregate rate)
11.5 bits typical (1 MS/s aggregate rate
with sine wave of 40kHz) 14.4 bits typical
(at 150 kS/s aggregate rate)
14.2 bits typical
(at 150 kS/s aggregate rate)
13.5 bits typical (at 150 kS/s aggregate rate
with sine wave of 20kHz)
Total Harmonic Distortion @
1kHz input
−
71dB typical (at 1.25 MS/s rate)
−
82dB typical (at 250 kS/s rate)