X60003C-41 INTERSIL [Intersil Corporation], X60003C-41 Datasheet - Page 8

• Manufacturer Part Number: X60003C-41
• Description: Precision 4.096V SOT-23 FGA Voltage References
• Manufacturer: INTERSIL [Intersil Corporation]

load capacitances above .001µF the noise reduction
network shown in fig. 3 is recommended. This network
reduces noise sig-nificantly over the full bandwidth. As
shown in fig. 2, noise is reduced to less than 40µVp-p
from 1Hz to 1MHz using this network with a .01µF
capacitor and a 2kΩ resistor in series with a 10µF
capacitor.
Figure 2.
Figure 3.
V
IN
= 5.0V
250
200
150
100
300
400
350
50
.1µF
0
1
10µF
X60003x-41 NOISE REDUCTION
10
CL = 0
CL = .001µF
CL = .1µF
CL = .01µF & 10µF + 2kΩ
X60003x-41
100
GND
V
IN
8
V
O
1000
.01µF
X6003B-41, X6003C-41, X6003D-41
10000
100000
2kΩ
10µF
Turn-On Time
The X60003x-41 device has ultra-low supply current
and thus the time to bias up internal circuitry to final
values will be longer than with higher power refer-
ences. Normal turn-on time is typically 7ms. This is
shown in the graph, Figure 4. Since devices can vary
in supply current down to 300nA, turn-on time can last
up to about 12ms. Care should be taken in system
design to include this delay before measurements or
conversions are started.
Figure 4.
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
measurement (T
by the nominal reference voltage (at T = 25°C) and
multiplied by 10
method for determining temperature coefficient.
V
LOW
), and divide by the temperature extremes of
7
6
5
4
3
2
1
0
-1
I
IN
1
X60003 TURN-ON TIME (25 C)
6
= 590nA
HIGH
to yield ppm/°C. This is the “Box”
3
- T
TIME (mSec)
I
IN
LOW
5
= 450nA
V
). The result is divided
IN
I
IN
7
= 340nA
9
11
March 15, 2005
HIGH
FN8138.0
-