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Número de pieza | SMP08 | |
Descripción | Octal Sample-and-Hold with Multiplexed Input | |
Fabricantes | Analog Devices | |
Logotipo | ||
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Octal Sample-and-Hold
with Multiplexed Input
SMP08*
FEATURES
Internal Hold Capacitors
Low Droop Rate
TTL/CMOS Compatible Logic Inputs
Single or Dual Supply Operation
Break-Before-Make Channel Addressing
Compatible With CD4051 Pinout
Low Cost
APPLICATIONS
Multiple Path Timing Deskew for ATE
Memory Programmers
Mass Flow/Process Control Systems
Multichannel Data Acquisition Systems
Robotics and Control Systems
Medical and Analytical Instrumentation
Event Analysis
Stage Lighting Control
FUNCTIONAL BLOCK DIAGRAM
(LSB)
INPUT A
(MSB)
B C INH
3 11 10 9
6
1 OF 8 DECODER
SW
8 DGND
16 VDD
13 CH0OUT
SW 14 CH1OUT
SW 15 CH2OUT
SW 12 CH3OUT
SW 1 CH4OUT
SW 5 CH5OUT
GENERAL DESCRIPTION
The SMP08 is a monolithic octal sample-and-hold; it has eight
internal buffer amplifiers, input multiplexer, and internal hold
capacitors. It is manufactured in an advanced oxide isolated
CMOS technology to obtain high accuracy, low droop rate, and
fast acquisition time. The SMP08 has a typical linearity error of
only 0.01% and can accurately acquire a 10-bit input signal to
± 1/2 LSB in less than 7 microseconds. The SMP08’s output
swing includes the negative supply in both single and dual sup-
ply operation.
The SMP08 was specifically designed for systems that use a
calibration cycle to adjust a multiple of system parameters. The
low cost and high level of integration make the SMP08 ideal for
calibration requirements that have previously required an
ASIC, or high cost multiple D/A converters.
SW
SW
HOLD CAPS
(INTERNAL)
SMP08
2 CH6OUT
4 CH7OUT
7 VSS
The SMP08 is also ideally suited for a wide variety of sample-
and-hold applications including amplifier offset or VCA gain
adjustments. One or more SMP08s can be used with single or
multiple DACs to provide multiple set points within a system.
The SMP08 offers significant cost and size reduction over dis-
crete designs. It is available in a 16-pin plastic DIP, or surface-
mount SOIC package.
*Protected by U.S. Patent No. 4,739,281.
REV. D
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1996
1 page 0
VDD = +12V
–1 VSS = 0V
–2 VIN = +5V
RL = 10kΩ
–3
–4
–5
–6
–7
–8
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE – °C
Figure 10. Offset Voltage vs.
Temperature
Typical Performance Characteristics–SMP08
14
VSS = 0V
NO LOAD
12
10
+85°C
8
+25°C
6
4 –40°C
2
4 6 8 10 12 14 16 18
VDD – Volts
Figure 11. Supply Current vs. VDD
90
80
70
60
50
40
30
20
10
0
10
–PSRR
+PSRR
VDD = +12V
VSS = 0V
VIN = +6V
TA = +25°C
NO LOAD
100 1k
10k 100k
FREQUENCY – Hz
1M
Figure 12. Sample Mode Power
Supply Rejection
2
1
0
–1
–2
–3
–4
–5
100
VDD = +12V
VSS = 0V
TA = +25°C
NO LOAD
90
45
0
PHASE
–45
–90
GAIN
–135
–180
1k 10k 100k 1M
FREQUENCY – Hz
–225
10M
Figure 13. Gain, Phase Shift vs.
Frequency
15
VDD = +6V
VSS = –6V
12 TA = +25°C
NO LOAD
9
6
3
0
10k 100k
1M
FREQUENCY – Hz
10M
Figure 15. Maximum Output Voltage
vs. Frequency
35
VDD = +12V
30 VSS = 0V
TA = +25°C
25 NO LOAD
20
15
10
5
0
10 100
1k 10k 100k
FREQUENCY – Hz
1M
Figure 14. Output Impedance vs.
Frequency
60
50
+PSRR
40
VDD = +12V
30 VSS = 0V
TA = +25°C
20 NO LOAD
10 HOLD CAPACITORS
REFERENCED TO VSS
0
–PSRR
–10
10
100 1k
10k 100k
FREQUENCY – Hz
1M
Figure 16. Hold Mode Power Supply
Rejection
REV. D
–5–
5 Page |
Páginas | Total 8 Páginas | |
PDF Descargar | [ Datasheet SMP08.PDF ] |
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