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PDF S9408 Data sheet ( Hoja de datos )
| Número de pieza | S9408 | |
| Descripción | Quad 8-Bit Nonvolatile DACPOT | |
| Fabricantes | Summit Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de S9408 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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SUMMIT
MICROELECTRONICS, Inc.
Serial Input, Quad 8-Bit Nonvolatile DACPOT™
S9408
FEATURES
• Four 8-Bit DACS
– Differential Non-linearity - ±0.5LSB max
– Integral Non-Linearity - ±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 Input Data Maintained in
Nonvolatile EEPROM
• Power-On Reset Reloads Registers with
Nonvolatile Data
• Simple Serial Interface for Reading and Writing
www.DataSDhAeeCt4Uv.acolumes, SPI™ and QSPI™ compatible.
• Fully operational from 2.7V to 5.5V
• Low Power: <1mW @ 2.7V
OVERVIEW
The S9408 DACPOT™ 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’ data latches and
registers. The DACs are independently programmable
and each has its own electrically isolated Vreference
inputs.
FUNCTIONAL BLOCK DIAGRAM
VDD 3
Memory Control
8-Bit E2PROM
DAC SECTION 0
Serial
Data In
8-Bit Data Register
8-Bit DAC
AMP
2 VREFH0
18 VOUT0
RDY/BSY# 4
Programming
Memory
Controller
CS#
DI
CLK
6
7
5
00/REG# 9
GND 10
Control
Logic
Serial Data Out
DAC SECTION 1
DAC SECTION 2
11 VREFL0
1 VREFH1
17 VOUT1
12 VREFL1
20 VREFH2
16 VOUT2
13 VREFL2
DAC SECTION 3
19 VREFH3
15 VOUT3
14 VREFL3
8 DO
2015 T BD 2.0
© SUMMIT MICROELECTRONICS, Inc. 2000 • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Phone 408-378-6461 • Fax 408-378-6586 • www.summitmicro.com
Characteristics subject to change without notice
2015 2.2 8/2/00
1
1 page  
S9408
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 S9408 is powered on the DAC output
values will be returned to the selected default setting. The
default setting can be the nonvolatile register contents or
all zeroes. The state of the 00/REG# pin will determine
which operation will be performed. If it is tied to ground (or
left floating) the nonvolatile register contents will be re-
called. Conversely, if it is tied to VDD the S9408 will recall
zeroes.
www.DataSheet4U.com
CS#
CLK
DI
VOUT
S
T
C1 C0 A1 A0
A
R
T
2015 T fig04 2.0
FIGURE 4. RECALL COMMAND SEQUENCE
SUMMIT MICROELECTRONICS, Inc.
2015 2.2 8/2/00
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet S9408.PDF ] | |
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