SUMMIT
MICROELECTRONICS, Inc.
S9418
Quad 8-Bit Nonvolatile DACPOT™ Electronic Potentiometer
With a Mute Control Input
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 V
DD
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
Memory Control
Programming
Memory
Controller
8-bit E2PROM
VREFH0
VOUT0
RDY/BSY
Serial Data In
8-bit Data Register
8-bit DAC
AMP
VREFL0
DAC Section 0
Serial Data Out
VREFH1
VOUT1
VREFL1
CS
DI
CLK
MUTE
VDD
GND
Control
Logic
DAC Section 1
DAC Section 2
VREFH2
VOUT2
VREFL2
VREFH3
VOUT3
VREFL3
DO
2023 ILL2 1.2
DAC Section 3
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
1
Characteristics subject to change without notice
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
