Serial Input, Quad 8-Bit Nonvolatile DACPOT鈩?/div>
FEATURES
鈥?Four 8-Bit DACS
鈥?Differential Non-linearity - 鹵0.5LSB max
鈥?Integral Non-Linearity - 鹵1LSB max
鈥?Each DAC has Independent Reference Inputs
鈥?Output Buffer Amplifiers Swing Rail-to-Rail
鈥?Ground to V
DD
Reference Input Range
鈥?Each DAC鈥檚 Digital Input Data Maintained in
Nonvolatile EEPROM
鈥?Power-On Reset Reloads Registers with
Nonvolatile Data
鈥?Simple Serial Interface for Reading and Writing
DAC values, SPI鈩?and QSPI鈩?compatible.
鈥?Fully operational from 2.7V to 5.5V
鈥?Low Power: <1mW @ 2.7V
OVERVIEW
The S9408 DACPOT鈩?is a serial input, voltage output,
quad 8-bit digital to analog converter. The S9408 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 S9408 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鈥?data latches and
registers. The DACs are independently programmable
and each has its own electrically isolated Vreference
inputs.
FUNCTIONAL BLOCK DIAGRAM
Memory Control
8-Bit E2PROM
DAC SECTION 0
2
VREFH0
VDD
3
Serial
Data In
8-Bit Data Register
8-Bit DAC
AMP
18
VOUT0
RDY/BSY#
4
Programming
Memory
Controller
11
Serial Data Out
1
DAC SECTION 1
17
12
VREFL0
VREFH1
VOUT1
VREFL1
CS#
DI
CLK
6
7
5
Control
Logic
20
00/REG#
9
DAC SECTION 2
GND
10
16
13
VREFH2
VOUT2
VREFL2
19
DAC SECTION 3
15
14
8
2015 T BD 2.0
VREFH3
VOUT3
VREFL3
DO
漏 SUMMIT MICROELECTRONICS, Inc. 2000 鈥?300 Orchard City Drive, Suite 131 鈥?Campbell, CA 95008 鈥?Phone 408-378-6461 鈥?Fax 408-378-6586 鈥?www.summitmicro.com
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