1
91年11月28日
ES51977
3 3/4 AUTO EASY
Features:
•
Full Automatic measurement
•
3 3/4 digits display
•
Frequency measurement (40M HZ)
•
Rotary or push setting mode
•
Auto-power-off then hold the final data
•
Rotary or push re-power on function
•
Data hold function
•
Low battery detect (3V & 9V)
•
On chip buzzer driver
•
3V DC power supply
•
Internal AC to DC conversion OP AMP
If non_AC mode , OP will become unit
gain buffer.
•
Serial Data Output(RS232 format)
•
LCD segment check
•
100 Pin flat-package
Description:
The ES51977 is an integrated analog-
to-digital converter (ADC)with 3 3/4 digits
and 42-segment bargraph LCD display,
automatic range, and 3V battery power
supply.
Automatic range selection is provided
for voltage (AC/DC) measurement, ohm
measurement, current(uA and mA)
measurement, and frequency counter. The
ES51977 also provides serial data output
function.
Expensive and bulky mechanical range
switches are not required. The other
functions are provided for data holding,
low battery detection, auto-power-off,
diode measurement, continuity checking.
Absolute Maximum Ratings
Characteristics
Ratings
Supply Voltage (V- to AGND)
-4V
Analog Input Voltage
V+ to V-
Digital Input
V- to DGND
Power Dissipation Flat Package
800mW
Operating Temperature
0℃ to 70℃
Storage Temperature
-25℃ to 125℃
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