EMC1413_14 Datasheet, PDF (25/54 Pages) Microchip Technology – Multiple Channel 1°C Temperature Sensors with Beta Compensation

Multiple Channel 1°C Temperature Sensors with Beta Compensation
Data Sheet
6.9
Anti-parallel Diode Connections
The EMC1414 supports reading two external diodes on the same set of pins (DP2, DN2). These
diodes are connected as shown in Figure 6.1. Due to the anti-parallel connection of these diodes, both
diodes will be reverse biased by a V_BE voltage (approximately 0.7V). Because of this reverse bias,
only discrete thermal diodes (such as a 2N3904) are recommended to be placed on these pins.
6.10
External Diode Connections
The EMC1413/EMC1414 can be configured to measure a CPU substrate transistor, a discrete 2N3904
thermal diode, or an AMD processor diode on the External Diode 1 channel only. For the EMC1414
the External Diode 2 and External Diode 3 channels are configured to measure a pair of discrete anti-
parallel diodes (shared on pins DP2 and DN2). The supported configurations for the external diode
channels are shown in Figure 6.5.
Figure 6.5 Diode Configurations
 2014 Microchip Technology Inc.
DS20005274A-page 25