78M6613-IM/F/P MAXIM [Maxim Integrated Products], 78M6613-IM/F/P Datasheet - Page 7

• Manufacturer Part Number: 78M6613-IM/F/P
• Description: Single-Phase AC Power Measurement IC
• Manufacturer: MAXIM [Maxim Integrated Products]

DS_6613_018
1.2.5 Temperature Sensor
The 78M6613 includes an on-chip temperature sensor implemented as a bandgap reference. It is used
to determine the die temperature. The MPU reads the temperature sensor output during alternate
multiplexer cycles. The primary use of the temperature data is to determine the magnitude of
compensation required to offset the thermal drift in the system (see
1.2.6 Functional Description
The AFE functions as a data acquisition system, controlled by the MPU. The input signals (A0, A1, A2,
and A3) are sampled and the ADC counts obtained are stored in CE DRAM where they can be accessed
by the CE and, if necessary, by the MPU. Alternate multiplexer cycles are initiated less frequently by the
MPU to gather access to the slow temperature signal.
Rev 2
Compensation).
A2
A0
A1
A3
TEMP
CTRL
MUX
MUX
MUX
CROSS
CK32
Figure 2: AFE Block Diagram
VBIAS
VREF
VREF
FIR_DONE
FIR_START
V3P3A
VBIAS
+
VREF
-
CONVERTER
Section 3.3 Temperature
∆Σ ADC
4.9152 MHz
78M6613 Data Sheet
FIR
7