ES51992
11,000 Counts ADC
Description
Features
• Max. 11,000 counts resolution
ES51992 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, ES51992 also
provides multi-channels input, low battery
detection, power-down mode, 50/60Hz line
noise rejection selection, and I/O port level
selection for flexible design.
• Conversion rate selectable by MPU
command: 1.6/s Æ 128/s
• Input signal full scale: 110mV
• 50/60Hz line noise rejection selectable by
MPU command
• Low battery detection
• Multiple input channels for ADC
• 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
Application
Clamp meter
Thermometer
Portable instrumentation
1
06/09/20