1
®
FN3554.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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HS-2420RH
Radiation Hardened Fast Sample and Hold
The HS-2420RH is a radiation hardened monolithic circuit
consisting of a high performance operational amplifier with
its output in series with an ultra-low leakage analog switch
and MOSFET input unity gain amplifier.
With an external hold capacitor connected to the switch output,
a versatile, high performance sample-and-hold or track-and-
hold circuit is formed. When the switch is closed, the device
behaves as an operation amplifier, and any of the standard op
amp feedback networks may be connected around the device
to control gain, frequency response, etc. When the switch is
opened the output will remain at its last level.
Performance as a sample-and-hold compares very favorably
with other monolithic, hybrid, modular, and discrete circuits.
Accuracy to better than 0.01% is achievable over the
temperature range. Fast acquisition is coupled with superior
droop characteristics, even at high temperatures. High slew
rate, wide bandwidth, and low acquisition time produce
excellent dynamic characteristics. The ability to operate at
gains greater than 1 frequently eliminates the need for
external scaling amplifiers.
The device may also be used as a versatile operational
amplifier with a gated output for applications such as analog
switches, peak holding circuits, etc.
Specifications for Rad Hard QML devices are controlled
by the Defense Supply Center in Columbus (DSCC). The
SMD numbers listed here must be used when ordering.
Detailed Electrical Specifications for these devices are
contained in SMD 5962-95669. A “hot-link” is provided
on our website for downloading.
Pinout
14 LEAD METAL-SEALED SIDE-BRAZED CERAMIC DIP
MIL-STD-1835, CDIP2-T14
TOP VIEW
Features
• Electrically Screened to SMD # 5962-95669
• QML Qualified per MIL-PRF-38535 Requirements
• Maximum Acquisition Time
- 10V Step to 0.1% . . . . . . . . . . . . . . . . . . . . . . . . . . 4µs
- 10V Step to 0.01% . . . . . . . . . . . . . . . . . . . . . . . . . 6µs
• Maximum Drift Current. . . . . . . . . . . . . . . . . . . . . . . 10nA
(Maximum Over Temperature)
• TTL Compatible Control Input
• Power Supply Rejection . . . . . . . . . . . . . . . . . . . . . ≥ 80dB
• Total Dose . . . . . . . . . . . . . . . . . . . . . 100 krad(Si) (Max)
• No Latch-Up
Applications
• Data Acquisition Systems
• D to A Deglitcher
• Auto Zero Systems
• Peak Detector
•Gated Op Amp
Functional Diagram
IN-
IN+
OFFSET ADJUST
OFFSET ADJUST
V-
NC
OUTPUT
SAMPLE
/HOLD
GND
NC
HOLD CAPACITOR
NC
V+
NC
CONTROL
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Ordering Information
ORDERING NUMBER
INTERNAL
MKT. NUMBER
TEMP. RANGE
(
o
C)
5962R9566901VCC HS1B-2420RH-Q -55 to 125
-
+
OFFSET
ADJUST
V+
-
+
7
OUTPUT
11
HOLD
CAPACITOR
- INPUT
+ INPUT
SAMPLE
/
HOLD
CONTROL
V-GND
14
2
1
HS-2420RH
34 5
513
Data Sheet February 2003
