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ADM1062 Datasheet(PDF) 25 Page - Analog Devices

Part No. ADM1062
Description  Super Sequencer with Margining Control and Temperature Monitoring
Download  36 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADM1062 Datasheet(HTML) 25 Page - Analog Devices

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ADM1062
Rev. C | Page 25 of 36
To measure ΔVBE, the sensor is switched between operating
currents of I and N × I. The resulting waveform is passed through
a 65 kHz low-pass filter to remove noise and through a chopper-
stabilized amplifier that amplifies and rectifies the waveform
to produce a dc voltage proportional to ΔVBE. This voltage is
measured by the ADC to produce a temperature output in 12-bit
offset binary. To further reduce the effects of noise, digital filtering
is performed by averaging the results of 16 measurement cycles.
A remote temperature measurement takes nominally 600 ms.
The results of remote temperature measurements are stored in
12-bit, offset binary format, as shown in Table 11. This format
provides temperature readings with a resolution of 0.125°C.
Table 11. Temperature Data Format
Temperature
Digital Output (Hex)
Digital Output (Binary)
−128°C
0x400
010000000000
−125°C
0x418
010000011000
−100°C
0x4E0
010011100000
−75°C
0x5A8
010110101000
−50°C
0x670
011001110000
−25°C
0x738
011100111000
−10°C
0x7B0
011110110000
0°C
0x800
100000000000
+10.25°C
0x852
100001010010
+25.5°C
0x8CC
100011001100
+50.75°C
0x996
100110010110
+75°C
0xA58
101001011000
+100°C
0XB20
101100100000
+125°C
0xBE8
101111101000
+128°C
0xC00
110000000000


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