ISL60002_10 Datasheet, PDF (34/36 Pages) Intersil Corporation – Precision Low Power FGA™ Voltage References

3.5
3.0
V_IN
2.5
2.0
UNIT 3
1.5
1.0
UNIT 1
UNIT 2
0.5
0
-1
1
3
5
7
TIME (ms)
ISL60002
Temperature Coefficient
The limits stated for temperature coefficient (tempco) are
governed by the method of measurement. The overwhelming
standard for specifying the temperature drift of a reference is to
measure the reference voltage at two temperatures, take the
total variation, (V_HIGH – V_LOW), and divide by the temperature
extremes of measurement (T_HIGH – T_LOW). The result is divided
by the nominal reference voltage (at T = +25°C) and multiplied
by 10⁶ to yield ppm/°C. This is the “Box” method for specifying
temperature coefficient.
9
11
3.5
V_IN
3.0
2.5
2.0
UNIT 3
UNIT 1
1.5
1.0
UNIT 2
0.5
0
-1
1
3
5
7
9
11
TIME (ms)
FIGURE 119. TURN-ON TIME
Typical Application Circuits
V_IN = 3.0V
R = 200Ω
2N2905
V_IN
ISL60002 ^VOUT
V_OUT = 2.50V
GND
2.5V/50mA
0.001µF
FIGURE 120. PRECISION 2.5V 50mA REFERENCE
34
FN8082.17
December 16, 2010