Datasheet
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SBOS146A − OCTOBER 1986 − REVISED AUGUST 2004
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17
B. AT THE UPPER RANGE VALUE (T = +150°C)
DR + R
T 150
o
C
* R
4
+ 156.4 * 109.4 + 47W
DV
CC
+
ǒ
24 0.005
Ǔ
) 20mA
ǒ
250W ) 100W
Ǔ
) 0.6V
+ 7720mV
e
1
+ 5.109V
e
2
+
ǒ
2mA 2.5kW
Ǔ
)
ǒ
1mA 156.4W
Ǔ
+ 5.156V
ǒ
e
1
* e
2
Ǔ
2
* 5V + 0.1325V
s
O
+ 6mA
s
1
+ 30mV )
ǒ
150nA 47W ) 20nA 190W
Ǔ
)
7720mV
3.16 10
5
)
0.1325V
3.16 10
3
+ 30mV ) 9.23mV ) 24mV ) 4.19mV
+ 67.42mV
s
S
+ 0.0001
e
IN
+ eȀ
2
* V
4
+ I
REF1
R
T 150
o
C
* I
REF2
R
4
+
ǒ
1mA 156.4W
Ǔ
*
ǒ
1mA 109W
Ǔ
+ 47mV
I
O
error + s
O
) K s
I
) K s
S
e
IN
+ 6mA )
ǒ
0.34AńV 67.42mV
Ǔ
)
ǒ
0.34AńV 0.0001 47000mV
Ǔ
+ 6mA ) 22.92mA ) 1.60mA
+ 30.52mA
% error +
30.52mA
16mA
100%
0.19% of span at upper range value.
CONCLUSIONS
Lower Range: From Equation 10, it is observed that the
predominant error term is the input offset voltage (30µV for
the B grade). This is of little consequence in many
applications. V
OS
RTI
can, however, be nulled using the
plots shown in Figure 5 and Figure 6. The result is an error
of 0.06% of span instead of 0.13% of span.
Upper Range: From Equation 11, the predominant errors
are I
OS
RTO
(6µA), V
OS
RTI
(30µV), and I
B
(150nA), max,
B grade. Both I
OS
and V
OS
can be trimmed to zero;
however, the result is an error of 0.09% of span instead of
0.19% of span.
RECOMMENDED HANDLING PROCEDURES
FOR INTEGRATED CIRCUITS
All semiconductor devices are vulnerable, in varying
degrees, to damage from the discharge of electrostatic
energy. Such damage can cause performance
degradation or failure, either immediate or latent. As a
general practice, we recommend the following handling
procedures to reduce the risk of electrostatic damage:
1. Remove the static-generating materials (such as
untreated plastic) from all areas that handle
microcircuits.
2. Ground all operators, equipment, and work stations.
3. Transport and ship microcircuits, or products
incorporating microcircuits, in static-free, shielded
containers.
4. Connect together all leads of each device by means
of a conductive material when the device is not
connected into a circuit.
5. Control relative humidity to as high a value as practical
(50% recommended).
(11)