ES5136
3 1/2 DIGIT A/D CONVERTER W/LCD(Low power)
I、GENERAL DESCRIPTION
The ES5136 combines analog section and digital section on a
single monolithic CMOS integrated circuit to provide a high
performance, very low power 3 1/2 –digit A/D converter. Each device
includes a dual slope converter, internal reference, seven segment
decoders, display drivers, and clock. The ES5136 is designed to
interface with a liquid crystal display and includes a back plane drive.
The supply current is only 150µA, very suitable for 9V battery
operation.
To built a high performance digital panel meter, ES5136 needs
only few passive components and a LCD display. The true differential
input and reference of ES5136 are versatile and useful in all systems,
and these give the designers an uncommon advantage to make the
measurement of load cells, train gauges and other bridge type
transducers.
The ES5136 can be used as a plug-in replacement for the ES5106
in a wide variety of applications by changing only the passive
components of the ES5106. The ES5136 differs from the ES5106 in
that it includes lower power dissipation, improved temperature
coefficient of analog common and scale factor, and the design of
ZERO INTEGRATE phase to eliminate the overrange hangover and
hysteresis.
1
ES5136
3 1/2 DIGIT A/D CONVERTER W/LCD(Low power)
II、FEATURES
*Pin compatible with ES5106.
*Internal reference with low temperature drift
*Direct LCD display drive
*No additional active components required
*Low input leakage current---1pA typical
*Guaranteed zero reading for 0 volts input on all scales
*Auto polarity indication
*True differential input and reference
*Internal clock circuit
*Low power consumption
III、APPLICATTONS
*Digital panel meters
*Digital multi-meters
*Digital centigrade thermometer
*pH meters
*Capacitance meters
2
ES5136
3 1/2 DIGIT A/D CONVERTER W/LCD(Low power)
IV、PIN ASSIGNMENT
40 PIN DIP Package
3
ES5136
3 1/2 DIGIT A/D CONVERTER W/LCD(Low power)
44PIN QFP Package
PIN ASSIGNMENT
REF LO
43
REF HI
44
IN LO
C
REF
+
42
IN HI
39
C
REF
-
41
COM
40
BUF
36
INT
AZ
37
V-
38
35
34
33
32
31
30
29
28
27
26
25
24
23
NC
NC
TEST
OSC3
NC
OSC2
OSC1
V+
D1
C1
B1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
NC
G2
C3
A3
G3
BP
POL
AB4
E3
F3
B3
ES5136Q
A1
F1
G1
E1
D2
C2
B2
A2
F2
E2
D3
4
ES5136
3 1/2 DIGIT A/D CONVERTER W/LCD(Low power)
V、BLOCK DIAGRAM
5
