HI7106
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3 / Digit, LCD/LED Display, A/D Converter
July 1998
2
Features
Description
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• Guaranteed Zero Reading for 0V Input on All Scales
• True Polarity at Zero for Precise Null Detection
• 1pA Typical Input Current
The Intersil HI7106 is a high performance, low power, 3 /
2
digit A/D converter. Included are seven segment decoders,
display drivers, a reference, and a clock. The HI7106 is
designed to interface with a liquid crystal display (LCD) and
includes a multiplexed backplane drive.
• True Differential Input and Reference,
Direct Display Drive
The HI7106 brings together a combination of high accuracy,
versatility, and true economy. It features auto-zero to less
than 10µV, zero drift of less than 1µV/ C, input bias current
• Low Noise - Less Than 15µV
o
P-P
of 10pA (Max), and rollover error of less than one count.
True differential inputs and reference are useful in all sys-
tems, but give the designer an uncommon advantage when
measuring load cells, strain gauges and other bridge type
transducers. Finally, the true economy of single power supply
operation enables a high performance panel meter to be built
with the addition of only 10 passive components and a display.
• On Chip Clock and Reference
• Low Power Dissipation - Typically Less Than 10mW
• No Additional Active Circuits Required
• Enhanced Display Stability
• Enhanced VCOM Reference Stability
Ordering Information
TEMP.
o
PART NO.
HI7106CPL
HI7106CM44
HI7106C/D
RANGE ( C)
0 to 70
PACKAGE
40 Ld PDIP
PKG. NO.
E40.6
0 to 70
44 Ld MQFP
DIE
Q44.10x10
0 to 70
Pinouts
HI7106
(PDIP)
HI7106
(MQFP)
TOP VIEW
TOP VIEW
1
2
40 OSC 1
39 OSC 2
38 OSC 3
37 TEST
V+
D1
C1
B1
A1
F1
G1
E1
D2
C2
B2
A2
F2
E2
D3
B3
F3
E3
3
4
(1’s)
5
36 REF HI
35 REF LO
6
44 43 42 41 40 39 38 37 36 35 34
1
NC
G2
C3
A3
G3
NC
NC
33
32
31
30
29
7
34
33
C
C
+
-
REF
REF
2
8
3
4
5
6
7
8
9
TEST
OSC 3
NC
9
32 COMMON
31 IN HI
30 IN LO
29 A-Z
10
11
12
13
14
15
16
17
18
19
20
(10’s)
OSC 2
OSC 1
V+
28
27
26
25
24
23
BP/GND
POL
AB4
E3
28 BUFF
27 INT
D1
26 V-
10
11
C1
F3
25 G2 (10’s)
24 C3
(100’s)
B1
B3
12 13 14 15 16 17 18 19 20 21 22
(100’s)
23 A3
22 G3
(1000) AB4
POL
21 BP/GND
A1 F1 G1 E1 D2 C2 B2 A2 F2 E2 D3
(MINUS)
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
File Number 4551
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
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