Datasheet

ADM1063
Rev. C | Page 22 of 32
To measure ΔV
BE
, 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 ΔV
BE
. 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 1 0 . This
format provides temperature readings with a resolution of 0.125°C.
Table 10. 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