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+5V Precision Voltage Reference
Output Adjustment
The MAX675 trim terminal can be used to adjust the out-
put voltage over a 5V ±150mV range. This feature allows
system errors to be trimmed by setting the reference to a
voltage other than 5V such as 5.120V for binary applica-
tions (see Typical Operating Circuit ). The trim terminal
may, of course, be left open if no adjustment is needed.
Adjustment of the output does not significantly affect the
temperature performance of the device. The temperature
coefficient change is approximately 0.7ppm/ ° C for each
100mV of output adjustment from its initial value.
Temperature Voltage Output
880
830
780
730
680
630
580
530
480
The MAX675 provides a temperature-dependent output
voltage on the TEMP pin. This voltage is proportional to
the absolute temperature, and has a scale factor of
approximately 2.1mV/ ° C (Figure 2).
430
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( ° C)
Output Voltage = 2.1(T + 273)mV
Figure 2. MAX675 Temperature Voltage Output vs.
Temperature
where T = Temperature in ° C
Typical Operating Characteristics
(T A = +25 ° C, unless otherwise noted.)
MAX675 OUTPUT WIDEBAND
LINE REGULATION
vs. FREQUENCY
NOISE vs. BANDWIDTH (0.1Hz
TO FREQUENCY INDICATED)
MAXIMUM LOAD CURRENT
vs. INPUT VOLTAGE
76
66
56
46
V IN = 15V
T A = +25 ° C
10,000
1000
35
30
25
20
SHORT-CIRCUIT PROTECTION
500mW MAXIMUM
DISSIPATION
36
15
26
16
100
10
5
6
10
0
T A = +25°C
10
100
1k
10k
100k
1M
10
100
1k
10k
100k
1M
5
10
15
20
25
FREQUENCY (Hz)
FREQUENCY (Hz)
INPUT VOLTAGE (V)
_______________________________________________________________________________________
3
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