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PDF SMP9317 Data sheet ( Hoja de datos )
| Número de pieza | SMP9317 | |
| Descripción | Nonvolatile DACPOT Electronic Potentiometer With Up/Down Counter Interface | |
| Fabricantes | ETC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SMP9317 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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SUMMIT
MICROELECTRONICS, Inc.
Nonvolatile DACPOT™ Electronic Potentiometer
With Up/Down Counter Interface
SMP9317
FEATURES
• Digitally Controlled Electronic Potentiometer
• 7-Bit Digital-to-Analog Converter (DAC)
– Independent Reference Inputs
– Differential Non-Linearity - +0.5LSB
– Integral Non-Linearity - +1LSB
• VOUT Value in EEPROM for Power-On Recall
– Equivalent to 128-Step Potentiometer
• Unity Gain Op Amp Drives ±100µA
• Simple Trimming Adjustment
– Up/Down Counter Style Operation
• Low Noise Operation
• “Clickless” Transitions between DAC Steps
• No Mechanical Wearout Problem
– 1,000,000 Stores (typical)
– 100 Year Data Retention
• Operation from +2.7V to +5.5V Supply
• Ultra-Low Power, 0.5mW max at +5V
OVERVIEW
The SMP9317 DACPOT™ trimmer is a 7-bit nonvolatile
DAC designed to replace mechanical potentiometers.
The SMP9317 includes a unity-gain amplifier to buffer the
DAC output and enables VOUT to swing from rail to rail.
The DACPOT trimmer operates over a supply voltage
range of 2.7V to 5.5V.
The SMP9317’s simple up/down counter input provides
an ideal interface for automatic test equipment to dither
and monitor the VOUT voltage. This interface allows for
quick and consistent calibration of even the most sophis-
ticated systems.
The SMP9317 is a pin-compatible performance upgrade
for other industry nonvolatile potentiometers. The
SMP9317 offers higher resolution than these devices and
provides ‘clickless’ transitions of VOUT.
FUNCTIONAL BLOCK DIAGRAM
VDD
7-bit E2 PROM
UP/DN
INC
CS
Counter
&
Write
Control
7-bit
Data
Register
7-bit DAC
-
AMP
+
VH
VOUT
GND
VL
2031 ILL2.0
SUMMIT MICROELECTRONICS, Inc. • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Telephone 408-378-6461 • Fax 408-378-6586 • www.summitmicro.com
© SUMMIT MICROELECTRONICS, Inc. 1998
2031-04 12/4/98
Characteristics subject to change without notice
1
1 page  
SMP9317
OPERATIONAL TRUTH TABLE
INC CS UP/DN
Operation
HITOLO
L
H VOUT toward VH
HITOLO
L
L VOUT toward VL
H LOTOHI
X
Store Setting
L LOTOHI
X Maintain Setting, NO Store
X H X Standby, note 1
2031 PGM T5.1
Notes: 1. The Standby or operating current will be lowest with INC and UP/DN pins at H as there are weak internal pull-ups that draw current
when connected LO.
AC TIMING CHARACTERISTICS
Symbol
Parameter
Min Max Units
tCLIL CS to INC Setup
100
ns
tIHDC
INC High to UP/DN Change
100
ns
tDCIL
UP/DN to INC Setup
100
ns
tIL INC Low Period
200
ns
tIH INC High Period
200
ns
tIHCH
INC Inactive to CS Inactive
100
ns
tWP Write Cycle Time
5 ms
tILVOUT
INC to VOUT Delay
5 µs
2031 PGM T6.0
CS
tCLIL
INC
UP/DN
VOUT
tIL
tIHDC
tIH
tILVOUT
tDCIL
tIHCH
AC TIMING DIAGRAM
tWP
2031 ILL3.1
2031-04 12/4/98
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet SMP9317.PDF ] | |
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