Datasheet

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last update
November 30, 2010
reference
smtutin
page
2/27
couplers required in insulated systems. For information about insulated UTI applications, please see the
relevant application notes in the support shop of our website. Continuous auto-calibration of offset and gain
of the complete system is performed by using the three-signal technique. The low-frequency interference is
removed by an advanced chopping technique. Selection of any of the sixteen operating modes takes place by
setting four mode-bits.
Functional block diagram
V
SS
V
DD
A
B
C
D
E
F
Logic control circuit
Frequency
Divider
Driver
Voltage to
Period
Converter
AMP/
C-V/
Divider
MUX
UTI
SL1 SL2 SL3 SL4 CML SF PD
OUT
The UTI is available in a 16-pin plastic dual-in-line package (DIP) as well as a 18-lead small outline package
(SOIC). Figure 1 shows the pin configurations of DIP and SOIC. The function of the pins is listed in Table 1 .
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Figure 1 pin configuration of DIL 16 and SOIC-18
Name Function of the pin
V
DD
, V
ss
Power supply
A, B, C, D, E, F Sensor connections
SEL1..SEL4 Mode selection (see Table 2)
OUT Output
SF Slow/fast mode selection
CML CMUX02/CMUX12 mode selection
PD Power Down (tri-state)
Table 1. Function of the pins
18-pins SOIC
9
8
7
6
5
4
3
2
18 1
UTI
Top View
(Not to Scale)
A
V
DD
E
F
CML
PD
OUT
SF
NC NC
V
SS
SL4
SL2
SL3
SL1
B
C
D
10
11
12
13
14
15
16
17
16-pins DIL
8
7
6
5
4
3
2
16 1
UTI
Top View
(Not to Scale)
V
DD
E
F
CML
PD
OUT
SF
A V
SS
SL4
SL2
SL3
SL1
B
C
D
9
10
11
12
13
14
15