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参数资料
| 型号： | REF10 |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | Precision Voltage Reference(精密电压基准) |
| 中文描述： | 精密电压基准（精密电压基准） |
| 文件页数： | 6/7页 |
| 文件大小： | 130K |
| 代理商： | REF10 |
REF10
6
affect drift, but the effect of the
TCR is reduced by a factor
of 40 by the internal resistor divider. A high quality poten-
tiometer with good mechanical stability, such as a cermet,
should be used. The circuit in Figure 3 has a range of
approximately +250mV to –100mV. The circuit in Figure 4
has less range but provides higher resolution. The mismatch
in TCR between R
and the internal resistors can introduce
some slight drift. This effect is minimized if R
is kept
significantly larger than the 156k
internal resistor. A TCR
of 100ppm/
°
C is normally sufficient.
FIGURE 3. REF10 Optional Output Voltage Adjust.
FIGURE 4. REF10 Optional Output Voltage Fine Adjust.
APPLICATION INFORMATION
High accuracy, extremely-low drift, and small size make the
REF10 ideal for demanding instrumentation and system
voltage reference applications. Since no heater is required,
low power supply current designs are readily achievable.
Also the REF10 has lower output noise and much faster
warm-up times than heated references, permitting high pre-
cision without extra power or additional supplies. It should
be considered that operating any integrated circuit at an
elevated temperature will reduce its MTTF.
A variety of application circuits are shown in Figures 5
through 11.
V
OUT
REF10
+V
CC
V
TRIM
Minimum range (+2.5%, –1.0%) and minimal degradation of drift.
2
6
5
4
20k
Output
Voltage
Adjust
+10V
1μF
Tantalum
+
REF10
2
4
R
1k
6
+V
CC
f
CO
= 2
π
RC
1
OPA27
C
100μF
V
OUT
= +10V
FIGURE 5. Precision Reference with Filtering.
FIGURE 6.
±
10V Reference.
REF10
2
4
+10V Out
–10V Out
2
1
6
5
3
INA105
+15V
6
FIGURE 7. Positive Precision Current Source.
V
OUT
REF10
V
TRIM
Higher resolution, reduced range.
2
6
5
4
20k
Output
Voltage
Adjust
+10V
R
S(1)
1μF
Tantalum
+
+V
CC
See Information in
Typical Performance
Curves
The TCR of R
can
affect V
drift if R
S
is made small.
NOTE: (1) R
S
typically 4M
.
REF10
2
4
OPA111
R
I
OUT
6
+V
CC
I
OUT
= 10V
≥
1k
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