NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 41

• Manufacturer Part Number: NCT6627UD
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

7.3
The eight analog inputs of the hardware monitor block connect to an 8-bit Analog to Digital Converter (ADC) and
consist of four general-purpose inputs connected to external device pins (CPUVCORE, VIN0 – VIN2) and four
internal signals connected to the power supplies (AVCC, VBAT, 5VSB and 5VCC). All inputs are limited to a
maximum voltage of 2.048V due to an internal setting of 8mV LSB (256 steps x 8mV = 2.048V). All inputs to the
ADC must limit the maximum voltage by using a voltage divider. The power supplies have internal resistors, while
the external pins require outside limiting resistors as described below.
As illustrated in the figure above, other connections may require some external circuits. The rest of this section
provides more information about voltages outside the range of the 8-bit ADC, CPU Vcore voltage detection, and
temperature measurement
Analog Inputs
Positive Voltage Input
Negative Voltage Input
Figure 7-4 Analog Inputs and Application Circuit of the W83627UHG
10K@25 C, beta=3435K
V2
V0
R
THM
CPUVCORE
VIN1
R1
CPUD+
CPUD-
(AGND)
10K, 1%
R
Power Inputs
15K, 1%
R2
R
R3
CAP,2200p
CPUTIN
SYSTIN
AVCC
VBAT
5VSB
5VCC
-32-
AGND
R4
VIN0
W83627UHG/NCT6627UD
VIN2
VREF
Pin 97
Pin 74
Pin 61
Pin 12
Pin 101
Pin 100
Pin 99
Pin 98
Publication Release Date: October 26, 2010
Pin 102
Pin 103
Pin 104
Pin 105
8-bit ADC
8mV LSB
with
Revision 1.7