ES51991
11,000 Counts ADC
Features
•
Max. 11,000 counts resolution
•
Conversion rate selectable by MPU
command: 1.6/s 128/s
•
Input signal full scale: 110mV
•
50/60Hz line noise rejection selectable by
MPU command
•
Low battery detection
•
3-wire serial bus and EOC signal for MPU
I/O port
•
-3V power operation with internal charge
pumping circuit
•
MPU I/O power level selectable by external
control pin
•
Zero calibration for eliminating offset error
•
On-chip buzzer driving and frequency
selectable by MPU command
•
Support sleep mode by external CS(chip-
select) pin
Description
ES51991 is an 11000-count dual-slope analog-
to-digital converter (ADC). The conversion
rate and buzzer frequency can be selected or
decided by an external microprocessor. The
conversion rate can be varied from 1.6 time/sec
to 128 times/sec under 4MHz/12MHz crystal
oscillation clock. Besides, ES51991 also
provides low battery detection, power-down
mode, 50/60Hz line noise rejection selection,
and I/O port level selection for flexible design.
Application
Clamp meter
Thermometer
Portable instrumentation
1
06/09/20
CYRUSTEK [ Cyrustek corporation ]
