ES5117
3 1/2 DVM
with
LED Display and Hold
Features
Description
•
Guaranteed zero reading with zero input The ES5117 is a monolithic CMOS 3 1/2
digit
LED display
A/D converter with
•
Low input leakage current (1pA typical)
Display Hold
function. It contains the
•
Internal reference with low temperature internal clock, voltage reference, seven-
segment decoder and LED display driver.
drift ( 60ppm/
℃
typically)
The improved internal zener reference
voltage circuit gives the analog common a
•
Low noise (15uVp-p typical)
small temperature coefficient of 60
ppm/
℃
•
Direct LED display driver
typically. The high accuracy characteristics
•
Differential input and voltage reference
•
Precise null detection with true polarity
at zero
•
Internal clock circuit
•
No additional active circuits required
•
Display Hold
of the ES5117 perform very low linearity
error and rollover error. The high input
impedance (>10
12
Ω)
and low input leakage
current (1pA typical) give the ES5117 a
good application in the field of high
impedance circuit measurement. The
differential input and reference are suitable
for measuring bridge transducer or ohms by
using ratio-metric method. The dual slope
conversion technique makes the ES5117 a
good normal and common mode rejection
ratio. With a suitable oscillator frequency,
the ES5117 has a high rejection of 50Hz,
60Hz and 400Hz line frequency noise. With
single power supply, a few passive
components and a LED display, ES5117 can
be built as high performance panel meter.
Application
Digital panel meters
1
03/07/21
CYRUSTEK [ Cyrustek corporation ]
