S9418 Datasheet PDF - ETC
| Part Number | S9418 | |
| Description | Quad 8-Bit Nonvolatile DACPOT Electronic Potentiometer With a Mute Control Input | |
| Manufacturers | ETC | |
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SUMMIT
MICROELECTRONICS, Inc.
Quad 8-Bit Nonvolatile DACPOT™ Electronic Potentiometer
With a Mute Control Input
S9418
FEATURES
• Four 8-Bit DACS
— Differential Non-linearity - ±0.5LSB max
— Integral Non-Linearity Error - ±1LSB max
• Each DAC has Independent Reference Inputs
— Output Buffer Amplifiers Swing Rail-to-Rail
— Ground to VDD Reference Input Range
• Each DAC’s Digital Inputs Maintained in
EEPROM
• Power-On Reset Reloads Registers with
Nonvolatile Data
• Simple Serial Interface for Reading and Writing
DAC values, SPI™ and QSPI™ compatible.
• Fully operational from 2.7V to 5.5V
• Low Power, 4mW max at +5V
OVERVIEW
The S9418 DACPOT™ is a serial input, voltage output,
quad 8-bit digital to analog converter. The S9418 oper-
ates from a single +2.7V to +5.5V supply. Internal preci-
sion buffers swing rail-to-rail and the reference input
range includes both ground and the positive supply.
The S9418 integrates four 8-bit DACs and their associ-
ated circuits which include; an enhanced unity gain opera-
tional amplifier output, an 8-bit data latch, an 8-bit non-
volatile register and an industry standard serial interface
for reading and writing data to the DACs’ data latches and
registers. The DACs are independently programmable
and each has its own electrically isolated Vreference
inputs.
FUNCTIONAL BLOCK DIAGRAM
RDY/BSY
Programming
Memory
Controller
Memory Control
8-bit E2PROM
Serial Data In 8-bit Data Register
CS
DI
CLK
MUTE
VDD
GND
Control
Logic
Serial Data Out
8-bit DAC
AMP
DAC Section 0
VREFH0
VOUT0
VREFL0
DAC Section 1
DAC Section 2
DAC Section 3
VREFH1
VOUT1
VREFL1
VREFH2
VOUT2
VREFL2
VREFH3
VOUT3
VREFL3
DO
2023 ILL2 1.2
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. 1999
2023 1.5 4/24/99
Characteristics subject to change without notice
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S9418
RECALL COMMAND
The recall command will retrieve data from the selected
nonvolatile register and write it into the data register of the
associated DAC. This operation is initiated by taking CS
LOW and clocking in a start bit followed by the recall
command and the address of the nonvolatile register to be
recalled. The eight bits of data are don’t care, so CS can
be taken high any time after the address bits are clocked
in. Refer to Figure 4 for an illustration of the sequence of
bus conditions for a Recall operation.
Power-On Recall
Whenever the S9418 is powered on, the VOUT values will
be returned to the analog equivalent of the data byte
stored in the nonvolatile register.
MUTE Operation
The MUTE input is active high. Whenever the input is low,
the VOUT will reflect the value in the data register. If MUTE
is driven high the VOUT outputs will be switched to VREFL.
Releasing the MUTE input returns the VOUT outputs to the
analog equivalent of the data register contents.
CS
CLK
DI
VOUT
S
T
C1 C0 A1 A0
A
R
T
2023 ILL6 1.0
FIGURE 4. RECALL COMMAND SEQUENCE
2023 1.5 4/24/99
5
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| Information | Total 10 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ S9418.PDF Datasheet ] | |
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