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參數(shù)資料
| 型號： | S9318S |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | Nonvolatile DACPOT⑩ Electronic Potentiometer With Up/Down Counter Interface |
| 中文描述： | 非易失DACPOT⑩電子電位隨著加/減計數(shù)器接口 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大?。?/td> | 34K |
| 代理商： | S9318S |
2
S9318
2016-04 4/24/99
Analog Section
The S9318 is an 8-bit, voltage output digital-to-analog
converter (DAC). The DAC consists of a resistor network
that converts an 8-bit value into equivalent analog output
voltages in proportion to the applied reference voltage.
Reference Inputs
The voltage differential between the V
L
and V
H
inputs
sets the full-scale output voltage range. V
L
must be equal
to or greater than ground (i.e. a positive voltage). V
H
must
be greater than V
L
and less than or equal to V
DD
. See
table on page 3 for guaranteed operating limits.
Output Buffer Amplifier
The voltage output is a precision unity-gain follower that
can slew up to 1V/
μ
s.
Digital Interface
The interface is designed to emulate a simple up/down
counter, but instead of a parallel count output, a
ratiometric voltage output is provided.
PINOUT
Chip Select (
high the S9318 is in standby mode and consumes the
least power. This mode is equivalent to a potentiometer
that is adjusted to the required setting. When
CS
is low the
S9318 will recognize transitions on the
INC
input and will
move the V
OUT
either toward the V
H
reference or toward
the V
L
reference depending upon the state of the UP/
DN
input.
CS
)
is an active low input. Whenever
CS
is
The host may exit an adjustment routine in two ways:
deselecting the S9318 while
INC
is low will not perform a
store operation (a subsequent power cycle will recall the
original data); deselecting the S9318 while
INC
is high will
store the current V
OUT
setting into nonvolatile memory.
Increment (
CS
is low and a high to low transition occurs on the
INC
input, the V
OUT
voltage will either move toward V
H
or V
L
depending upon the state of the UP/
DN
input.
INC
)
is an edge triggered input. Whenever
UP/Down (UP/
movement relative to V
H
and V
L
. When
CS
is low, UP/
DN
is high and there is a high to low transition on
INC
, the
V
OUT
voltage will move (1/256
th
x V
H
-V
L
) toward V
H
.
When
CS
and UP/
DN
are low, and there is a high to low
transition on
INC
, the V
OUT
will move (1/256
th
x V
H
-V
L
)
toward V
L
.
DN
)
is an input that will determine the V
OUT
INC
UP/DN
VH
GND
1
2
3
4
8
7
6
5
2016 ILL1.1
VDD
CS
VL
VOUT
PIN NAMES
Symbol
Description
INC
Increment Input, High to Low
Edge Trigger
UP/
DN
Up/Down Input controlling relative
V
OUT
movement
V
H
V+ reference input
GND
Analog and Digital Ground
V
OUT
Trimmed Voltage Output
V
L
V- reference input
CS
Active low chip select input
V
DD
Supply Voltage (2.7V to 5.5V)
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