ISL60002 Datasheet, PDF (35/37 Pages) Intersil Corporation – Precision, Low Noise FGA Voltage References

ISL60002
3.5
3.0
V_IN
2.5
2.0
UNIT 3
1.5
1.0
UNIT 1
UNIT 2
0.5
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.
0
-1
1
3
5
7
TIME (ms)
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
TIME (ms)
FIGURE 119. TURN-ON TIME
Typical Application Circuits
V_IN = 3.0V
11
R = 200Ω
2N2905
V_IN
ISL60002 ^VOUT
V_OUT = 2.50V
GND
2.5V/50mA
0.001µF
FIGURE 120. PRECISION 2.5V 50mA REFERENCE
35
FN8082.16
May 4, 2009