Z8F16800144ZCOG Zilog, Z8F16800144ZCOG Datasheet - Page 265
Z8F16800144ZCOG
Manufacturer Part Number
Z8F16800144ZCOG
Description
KIT DEV FOR Z8F642 MCU 44 PIN
Manufacturer
Zilog
Series
Z8 Encore!®r
Type
MCUr
Specifications of Z8F16800144ZCOG
Contents
Hardware, Software and Documentation
For Use With/related Products
Z8F642
For Use With
269-4661 - KIT ACC ETHERNET SMART CABLE
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
269-4678
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Temperature Sensor
Overview
Operation
PS025011-1010
The on-chip Temperature Sensor allows you to measure temperature on the die to an
accuracy of roughly ±7 °C over a range of -40 °C to +105 °C. Over a reduced range, the
accuracy is significantly better. This block is a moderately accurate temperature sensor for
low-power applications where high accuracy is not required. Uncalibrated accuracy is
significantly worse, therefore the temperature sensor is not recommended for
untrimmed use:
•
•
•
•
The on-chip temperature sensor is a PTAT (proportional to absolute temperature) topology
which has provision for zero-point calibration. A pair of Flash option bytes contain the
calibration data. The temperature sensor can be disabled by a bit in the
Register 0
The temperature sensor can be directly read by the ADC to determine the absolute value of
its output. The temperature sensor output is also available as an input to the comparator for
threshold type measurement determination. The accuracy of the sensor when used with the
comparator is substantially less than when measured by the ADC. Maximum accuracy can
be obtained by customer re-trimming the sensor using an external reference and a high-
precision external reference in the target application.
During normal operation, the die undergoes heating that will cause a mismatch between
the ambient temperature and that measured by the sensor. For best results, the XP device
should be placed into STOP mode for sufficient time such that the die and ambient
temperatures converge (this time will be dependent on the thermal design of the system).
The temperature sensor should be measured immediately after recovery from STOP mode.
The following equation defines the relationship between the ADC reading and the die
temperature:
If bit 2 of TEMPCALH calibration option byte is zero, then
On-chip temperature sensor.
±7 °C full-range accuracy for calibrated version.
±1.5 °C accuracy over the range of 20 °C to 30 °C.
Flash recalibration capability.
T = (25/128) * (ADC + {TEMPCALH_bit1, TEMPCALH_bit0, TEMPCALL}) – 77
(where T is the temperature in °C; ADC is the 10-bit compensated ADC value).
on page 47 to reduce power consumption.
P R E L I M I N A R Y
Z8 Encore! XP
Product Specification
Power Control
Temperature Sensor
®
F1680 Series
251
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