HA9P5340-5 Datasheet PDF - Intersil Corporation
| Part Number | HA9P5340-5 | |
| Description | 700ns/ Low Distortion/ Precision Sample and Hold Amplifier | |
| Manufacturers | Intersil Corporation | |
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Data Sheet
HA-5340
September 1998
File Number 2859.3
700ns, Low Distortion, Precision Sample
and Hold Amplifier
The HA-5340 combines the advantages of two sample/ hold
architectures to create a new generation of monolithic
sample/hold. High amplitude, high frequency signals can be
sampled with very low distortion being introduced. The
combination of exceptionally fast acquisition time and
specified/characterized hold mode distortion is an industry
first. Additionally, the AC performance is only minimally
affected by additional hold capacitance.
To achieve this level of performance, the benefits of an
integrating output stage have been combined with the
advantages of a buffered hold capacitor. To the user this
translates to a front-end stage that has high bandwidth due to
charging only a small capacitive load and an output stage with
constant pedestal error which can be nulled out using the
offset adjust pins. Since the performance penalty for
additional hold capacitance is low, the designer can further
minimize pedestal error and droop rate without sacrificing
speed.
Low distortion, fast acquisition, and low droop rate are the
result, making the HA-5340 the obvious choice for high
speed, high accuracy sampling systems. For a Military
temperature range version request the HA-5340/883 data
sheet.
Ordering Information
PART NUMBER
HA3-5340-5
HA9P5340-5
TEMP.
RANGE (oC)
PACKAGE
0 to 75 14 Ld PDIP
0 to 75 16 Ld SOIC
Functional Diagram
PKG.
NO.
E14.3
M16.3
ADJUST OFFSET
CHOLD EXTERNAL
(OPTIONAL)
34
1
-IN
2
+IN
S/H 14
CONTROL
9
5
11 7
CHOLD
120pF
CCOMP
15pF
7 OUT
13 6
V+ V- SUPPLY SIGNAL GND
GND
Features
• Fast Acquisition Time (0.01%) . . . . . . . . . . . . . . . . . 700ns
• Fast Hold Mode Settling Time (0.01%). . . . . . . . . . . . 200n
• Low Distortion (Hold Mode) . . . . . . . . . . . . . . . . . . -72dBc
(VIN = 200kHz, fS = 450kHz, 5VP-P)
• Bandwidth Minimally Affected By External CH
• Fully Differential Analog Inputs
• Built-In 135pF Hold Capacitor
• Pin Compatible with HA-5320
Applications
• High Bandwidth Precision Data Acquisition Systems
• Inertial Navigation and Guidance Systems
• Ultrasonics
• SONAR
• RADAR
Pinouts
HA-5340
(PDIP)
TOP VIEW
-IN 1
+IN 2
OFFSET ADJ. 3
OFFSET ADJ. 4
V- 5
SIG. GND 6
OUTPUT 7
14 S/H CONTROL
13 SUPPLY GND
12 NC
11
EXTERNAL
HOLD CAP.
10 NC
9 V+
8 NC
HA-5340
(SOIC)
TOP VIEW
-IN 1
+IN 2
OFFSET ADJ. 3
OFFSET ADJ. 4
NC 5
V- 6
SIG. GND 7
OUTPUT 8
16 S/H CONTROL
15 SUPPLY GND
14 NC
13 NC
12
EXTERNAL
HOLD CAP.
11 NC
10 NC
9 V+
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
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HA-5340
Application Information
The HA-5340 has the uncommitted differential inputs of an op
amp, allowing the Sample and Hold function to be combined
with many conventional op amp circuits. See the Intersil
Application Note AN517 for a collection of circuit ideas.
Layout
A printed circuit board with ground plane is recommended
for best performance. Bypass capacitors (0.01µF to 0.1µF,
ceramic) should be provided from each power supply
terminal to the Supply Ground terminal on pin 13.
The ideal ground connections are pin 6 (SIG. GND) directly
to the system Signal Ground, and pin 13 (Supply Ground)
directly to the system Supply Common.
Hold Capacitor
The HA-5340 includes a 135pF MOS hold capacitor,
sufficient for most high speed applications (the Electrical
Specifications section is based on this internal capacitor).
Additional capacitance may be added between pins 7 and
11. This external hold capacitance will reduce droop rate at
the expense of acquisition time, and provide other trade-offs
as shown in the Performance Curves.
The hold capacitor CH should have high insulation
resistance and low dielectric absorption, to minimize droop
errors. Teflon®, polystyrene and polypropylene dielectric
capacitor types offer good performance over the specified
operating temperature range.
The hold capacitor terminal (pin 11) remains at virtual
ground potential. Any PC connection to this terminal should
be kept short and “guarded” by the ground plane, since
nearby signal lines or power supply voltages will introduce
errors due to drift current.
®Teflon is a registered Trademark of Dupont Corporation.
Typical Application
Figure 5 shows the HA-5340 connected as a unity gain
noninverting amplifier - its most widely used configuration.
As an input device for a fast successive - approximation A/D
converter, it offers very high throughput rate for a monolithic
IC sample/hold amplifier. Also, the HA-5340’s hold step error
is adjustable to zero using the Offset Adjust potentiometer,
to deliver a 12-bit accurate output from the converter.
The HA-5340 output circuit does not include short circuit
protection, and consequently its output impedance remains
low at high frequencies. Thus, the step changes in load
current which occur during an A/D conversion are absorbed
at the S/H output with minimum voltage error. A momentary
short circuit to ground is permissible, but the output is not
designed to tolerate a short of indefinite duration.
-15V +15V
OFFSET
ADJUST
≈ ±15mV
CH
50kΩ
3 4 5 9 11
VIN
S/H CONTROL
H
S
1
2
14
13
HA -5340
120pF
15pF
6
SYSTEM
POWER
GROUND
SYSTEM
SIGNAL
GROUND
HI - 774
7 13 INPUT
CONVERT
DIGITAL
OUTPUT
5 R/C
9 ANALOG
COMMON
NOTE: Pin Numbers Refer to
DIP Package Only.
FIGURE 5. TYPICAL HA-5340 CONNECTIONS; NONINVERTING UNITY GAIN MODE
5
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