HA-2420, HA-2425
3.2µs Sample and Hold Amplifiers
November 1996
Features
Description
• Maximum Acquisition Time
The HA-2420 and HA-2425 is a monolithic circuit consisting
- 10V Step to 0.1%. . . . . . . . . . . . . . . . . . . . . 4µs (Max) of a high performance operational amplifier with its output in
series with an ultra-low leakage analog switch and JFET
input unity gain amplifier.
- 10V Step to 0.01%. . . . . . . . . . . . . . . . . . . . 6µs (Max)
• Low Droop Rate (C = 1000pF). . . . . . . . 5µV/ms (Typ)
H
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 operational 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.
• Gain Bandwidth Product . . . . . . . . . . . . . 2.5MHz (Typ)
• Low Effective Aperture Delay Time . . . . . . . 30ns (Typ)
• TTL Compatible Control Input
• ±12V to ±15V Operation
Applications
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.
• 12-Bit Data Acquisition
• Digital to Analog Deglitcher
• Auto Zero Systems
• Peak Detector
• Gated Operational Amplifier
Ordering Information
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. For more information,
please see Application Note AN517.
TEMP.
PKG.
NO.
o
PART NUMBER RANGE ( C)
PACKAGE
HA1-2420-2
HA1-2425-5
HA3-2425-5
HA4P2425-5
HA9P2425-5
-55 to 125 14 Ld CERDIP
F14.3
0 to 75
0 to 75
0 to 75
0 to 75
14 Ld CERDIP
14 Ld PDIP
20 Ld PLCC
14 Ld SOIC
F14.3
The MIL-STD-883 data sheet for this device is available on
request.
E14.3
N20.35
M14.15
Pinouts
HA-2420 (CERDIP)
HA-2425 (CERDIP, PDIP, SOIC)
TOP VIEW
HA-2425
(PLCC)
TOP VIEW
-IN
1
2
3
4
5
6
7
14 S/H CONTROL
13 GND
3
2
1
20 19
+IN
4
5
OFFSET ADJ.
OFFSET ADJ.
V-
12 NC
18
17
16
OFFSET ADJ.
NC
NC
NC
11 HOLD CAP.
10 NC
HOLD CAP.
OFFSET ADJ.
6
7
8
15 NC
14 NC
NC
V-
NC
9
8
V+
NC
OUTPUT
9
10 11 12 13
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
File Number 2856.2
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