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AD7293 Datasheet(PDF) 20 Page - Analog Devices

Part # AD7293
Description  12-Bit Power Amplifier Current Controller with ADC, DACs, and Temperature and Current Sensors
PDF  79 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7293 Datasheet(HTML) 20 Page - Analog Devices

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AD7293
Data Sheet
Rev. D | Page 20 of 79
10
10000
1000
100
CAPACITANCE (pF)
–7.5
–7.0
–6.5
–6.0
–5.5
–5.0
–4.5
–4.0
–3.5
–3.0
–2.5
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
SENSOR RESULT AT +25°C
SENSOR RESULT AT +105°C
SENSOR RESULT AT +150°C
SENSOR RESULT AT –40°C
Figure 26. Temperature Error vs. Capacitance from Dx+ to Dx−
0
10
9
8
7
6
5
4
3
2
1
SERIES RESISTANCE (kΩ)
–0.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
SENSOR RESULT AT +25°C
SENSOR RESULT AT +105°C
SENSOR RESULT AT +150°C
SENSOR RESULT AT –40°C
SENSOR RESULT AT –55°C
Figure 27. Temperature Error vs. Series Resistance for Typical Devices
–40
–20
0
20
40
60
80
100
120
DUT TEMPERATURE (°C)
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
Figure 28. Temperature Sensor Error vs. Device Under Test (DUT)
Temperature
–60
–120
–115
–110
–105
–100
–95
–90
–85
–80
–75
–70
–65
100
100M
10M
1M
100k
10k
1k
FREQUENCY (Hz)
Figure 29. High-Side Current Sensor at Common-Mode Rejection Ratio (CMRR)
2.504
2.495
2.496
2.497
2.498
2.499
2.500
2.501
2.502
2.503
–60
–40
140
120
100
80
60
40
20
0
–20
TEMPERATURE (°C)
TESTER TRIMMED DUT1
TESTER TRIMMED DUT6
TESTER TRIMMED DUT4
TESTER TRIMMED DUT9
TESTER TRIMMED DUT5
TESTER TRIMMED DUT10
TESTER TRIMMED DUT11
TESTER TRIMMED DUT2
TESTER TRIMMED DUT7
TESTER TRIMMED DUT12
TESTER TRIMMED DUT3
TESTER TRIMMED DUT8
TESTER TRIMMED DUT13
Figure 30. ADC Reference vs. Temperature
–40
–20
120
100
80
60
40
20
0
TEMPERATURE (°C)
0.10002
0.10004
0.10006
0.10008
0.10010
0.10012
0.10014
0.10016
0.10018
0.10020
0.10022
MIDSCALE DRIFT WITH EXTERNAL REFERENCE
MIDSCALE DRIFT WITH INTERNAL REFERENCE
Figure 31. Closed-Loop RSENSE Voltage Regulation vs. Temperature



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