High-Precision Voltage References with
Temperature Sensor
MAX6173鈥揗AX6177
Temperature Coefficient vs. Operating
Temperature Range for a
1 LSB Maximum Error
In a data converter application, the reference voltage
of the converter must stay within a certain limit to keep
the error in the data converter smaller than the resolu-
tion limit through the operating temperature range.
Figure 1 shows the maximum allowable reference-volt-
age temperature coefficient to keep the conversion
error to less than 1 LSB, as a function of the operating
temperature range (T
MAX
- T
MIN
) with the converter
resolution as a parameter. The graph assumes the ref-
erence-voltage temperature coefficient as the only
parameter affecting accuracy.
In reality, the absolute static accuracy of a data con-
verter is dependent on the combination of many para-
meters such as integral nonlinearity, differential
nonlinearity, offset error, gain error, as well as voltage-
reference changes.
( V
OUT
+ 2V) TO 40V INPUT
IN
REFERENCE
OUTPUT
OUT
*
MAX6173鈥揗AX6177
MAX5436
50k鈩?/div>
POTENTIOMETER
TEMP
TRIM
GND
*OPTIONAL.
Figure 2. Applications Circuit Using the MAX5436 Potrntiometer
Pin Configuration
TOP VIEW
I.C.*
IN
TEMP
1
2
3
8
7
I.C.*
N.C.
OUT
TRIM
Chip Information
TRANSISTOR COUNT: 429
PROCESS: BiCMOS
MAX6173鈥?/div>
MAX6177
6
5
GND 4
SO
*INTERNALLY CONNECTED. DO NOT CONNECT.
14
______________________________________________________________________________________
prev
next