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A-2
Specifications
Temperature coefficient of
accuracy (includes ADC)
Offset
Gain
• ±20µV/˚C ±(12µV/˚C ÷ gain) maximum for bipolar
• ±20µV/˚C ±(14µV/˚C ÷ gain) maximum for unipolar
• ±20ppm/˚C for gain < 50
• ±30ppm/˚C for gain = 50
• ±35ppm/˚C for gain = 250
Linearity
1
(relative accuracy) • Integral: ±
½
LSB typical, ±1 LSB maximum
• Differential: ±1 LSB
Throughput
333 ksamples/s
Refer to “Maximum Achievable Throughput Rates” on page 2-9
Dynamic parameters
• Acquisition time: 0.3µs
• Aperture delay: 13.0ns
• Aperture uncertainty: 150ps rms
• Conversion time: 3.0µs max. (includes acquisition time)
Input bias current
• ±40nA max. @ 25˚C
• ±60nA max. over operating range
Common-mode rejection ratio • 74 dB for gain = 1
• 80 dB for gain = 5
• 100 dB for gain = 50
• 100 dB for gain = 250
• 74 dB for gain = 1
• 80 dB for gain = 2
• 80 dB for gain = 4
• 86 dB for gain = 8
Input overvoltage
• ±15V continuous powered
• ±15V continuous unpowered
Noise
2
Bipolar electrical noise
(in counts)
Unipolar electrical noise
(in counts)
• p-p = 1, rms = 0.1 for gain = 1
• p-p = 1, rms = 0.1 for gain = 5
• p-p = 4, rms = 0.5 for gain = 50
• p-p = 8, rms = 1.0 for gain = 250
• p-p = 1, rms = 0.1 for gain = 1
• p-p = 1, rms = 0.1 for gain = 5
• p-p = 6, rms = 0.9 for gain = 50
• p-p = 9, rms = 1.4 for gain = 250
• p-p = 1, rms = 0.1 for gain = 1
• p-p = 1, rms = 0.1 for gain = 2
• p-p = 1, rms = 0.1 for gain = 4
• p-p = 1, rms = 0.1 for gain = 8
• p-p = 1, rms = 0.1 for gain = 1
• p-p = 1, rms = 0.1 for gain = 2
• p-p = 1, rms = 0.1 for gain = 4
• p-p = 1, rms = 0.1 for gain = 8
DMA levels
5, 6, and 7
Table A-1. Analog Input Specifications for DAS-1800ST Series (cont.)
Feature
DAS-1801ST/ST-DA
DAS-1802ST/ST-DA
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