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ADUCM350 датащи(PDF) 29 Page - Analog Devices

номер детали ADUCM350
подробное описание детали  16-Bit Precision, Low Power Meter On A
PDF  41 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

ADUCM350 датащи(HTML) 29 Page - Analog Devices

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ADuCM350
Data Sheet
Rev. A | Page 28 of 40
Figure 28. Settling Time of the DAC at RCAL
Figure 29. Impedance Measurement Magnitude Accuracy
Figure 30. Impedance Measurement Phase Accuracy
Figure 31. Impedance Measurement Magnitude Precision
Figure 32. Impedance Measurement Phase Precision
Figure 33. CapTouch Linearity
0.4
0.6
0.8
1.0
1.2
1.4
1.6
–15
–10
–5
0
5
10
15
20
25
30
TIME (µs)
0xC00 TO 0x400
0x400 TO 0xC00
0
10
20
30
40
50
60
70
80
90
190.94
191.04
191.13
191.23
191.32
191.42
IMPEDANCE MAGNITUDE (Ω)
Z = 127Ω + 56nF
SINE AMPLITUDE = 9mV rms
DAC_ATTEN_EN = 1
RTIA = 7.5kΩ
1000 ADuCM350
DEVICES MEASURED
0
10
20
30
40
50
60
70
80
90
100
–48.66
–48.63
–48.59
–48.55
–48.52
–48.48
IMPEDANCE PHASE (°)
Z = 127Ω + 56nF
SINE AMPLITUDE = 9mV rms
DAC_ATTEN_EN = 1
RTIA = 7.5kΩ
1000 ADuCM350
DEVICES MEASURED
0
50
100
150
200
250
300
350
400
450
500
181.5
182.2
183.0
183.7
184.4
185.2
IMPEDANCE MAGNITUDE (Ω)
1000 MEASUREMENTS
ON 1 ADuCM350 DEVICE
Z = 127Ω + 56nF
SINE AMPLITUDE = 9mV rms
DAC_ATTEN_EN = 1
RTIA = 7.5kΩ
0
50
100
150
200
250
300
350
400
450
500
40.08
40.28
40.48
40.68
40.88
41.08
IMPEDANCE PHASE (°)
Z = 127Ω + 56nF
SINE AMPLITUDE = 9mV rms
DAC_ATTEN_EN = 1
RTIA = 7.5kΩ
1000 MEASUREMENTS
ON 1 ADuCM350 DEVICE
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
0
5
10 15 20 25 30 35 40 45 50 55 60 65 70
INPUT CAPACITANCE (pF)
4.662pF_G1
6.993pF_G1
9.324pF_G1
2.331pF_G2
4.662pF_G2
6.993pF_G2
9.324pF_G2
2.331pF_G4
4.662pF_G4
6.993pF_G4
9.324pF_G4
CAPDAC COMPENSATED
AT 50pF
AUTOZERO = 2µs
HOLD TIME = 2µs
PH13 = 2µs
PH23 = 4µs



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