HS1-2420RH-Q データシートの表示（PDF） - Intersil
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HS1-2420RH-Q Datasheet PDF : 13 Pages
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HS-2420RH
HOLD STEP VOLTAGE (V)
+10
+5
-10
-5
+5
+10
DC INPUT VOLTAGE (V)
-5
CH = 0.1µF
-10
CH = 10,000pF
-15
CH = 1000pF
-20
-25
-30
CH = 100pF
-35
FIGURE 14. HOLD STEP vs INPUT VOLTAGE
S/H
CONTROL
V+
CH
-
+
+
-
HS-2420RH
-IN +IN
V-
OUT
100kΩ
OFFSET TRIM
(±25mV RANGE)
FIGURE 15. BASIC SAMPLE-AND-HOLD (TOP VIEW)
0.002RF
RF
INPUT
RI
-IN
HS-2420RH
OUT
+IN
S/H
CONTROL
OUTPUT
S/H CONTROL
INPUT
-RF
GAIN ~ RI
FIGURE 16. INVERTING CONFIGURATION
INPUT
+IN
HS-2420RH
-IN
S/H
CONTROL
RF
OUT
OUTPUT
S/H CONTROL
RI
INPUT
0.002RI
-RF
GAIN ~ I + RI
FIGURE 17. NONINVERTING CONFIGURATION
Offset and Gain Adjustment
Offset Adjustment
The offset voltage of the HS-2420RH may be adjusted using
a 100kΩ trim pot, as shown in Figure 15. The recommended
adjustment procedure is:
1. Apply zero volts to the sample-and-hold input, and a
square wave to the S/H control.
2. Adjust the trim pot for zero volts output in the hold mode.
Gain Adjustment
The linear variation in pedestal voltage with sample-and-hold
input voltage causes a -0.06% gain error (CH = 1000pF). In
some applications (D/A deglitcher, A/D converter) the gain
error can be adjusted elsewhere in the system, while in other
applications it must be adjusted at the sample-and-hold. The
two circuits shown below demonstrate how to adjust gain
error at the sample-and-hold.
The recommended procedure for adjusting gain error is:
1. Perform offset adjustment.
2. Apply the nominal input voltage that should produce a
+10V output.
3. Adjust the trim pot for +10V output in the hold mode.
4. Apply the nominal input voltage that should produce a -10V
output.
5. Measure the output hold voltage (V-10 NOMINAL). Adjust
the trim pot for an output hold voltage of
--(--V-------1---0-----N-----O-----M-----I-N---2--A----L---)-----+------(--–---1----0----V----)-
Spec Number 518855
10
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