Ver 1.2
8
22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Functional Description
Operation Modes
Voltage Measurement
A voltage divider automatically provides a suitable range in voltage measurement mode. The following
table summarizes the full-scale ranges in each configuration.
In scan mode, ES269 can automatically detect ACV/DCV input signal. The input voltage must exceed
500mV
RMS
2
to switch to ACV measurement and 350mV to switch to DCV measurement.
In auto mode, ES269 can automatically switch to appropriate range for measurement.
In manual mode, User can switch range by Range key.
ES269 has an OL display selection feature achieved by configuring a S600VEFSEL pin. If pin
S600VEFSEL is floating or is connected to V+, the DCV and ACV overflow level is 600.0V. If pin
S600VEFSEL is connected to AGND or V-, the DCV and ACV overflow level is 1000.0V. When the
measuring signal reaches the overflow level, OL will be showed on the LCD, and the buzzer will sound
an alarm. The configuration of S600VEFSEL is listed below. See Table 12 for details.
Table 3. Voltage ranges
Configuration
Full Scale Range
Divider Ratio
Resister Connection
VR1
6.000V
1/10
VR2 (220KΩ)
VR2
60.00V
1/100
VR3 (20KΩ)
VR3
600V/1000V
1/1000
VR4 (2KΩ)
2
The threshold is not a consistent value, it depends on the frequency of test signal. 500mV
RMS
at 50Hz
test condition.
