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DAC8814ICDB Datasheet

  • DAC8814ICDB

  • Quad, Serial Input 16-Bit Multiplying Digital-to-Analog Conv...

  • 257.29KB

  • 31頁

  • TI

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DAC8814
www.ti.com
SBAS338 鈥?JANUARY 2005
Quad, Serial Input 16-Bit Multiplying Digital-to-Analog Converter
FEATURES
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Relative Accuracy: 1 LSB Max
Differential Nonlinearity: 1 LSB Max
2-mA Full-Scale Current
鹵20%,
with V
REF
=
鹵10
V
0.5 碌s Settling Time
Midscale or Zero-Scale Reset
Four Separate 4Q Multiplying Reference
Inputs
Reference Bandwidth: 10 MHz
Reference Dynamics: -105 dB THD
SPI鈩?Compatible 3-Wire Interface:
50 MHz
Double Buffered Registers Enable
Simultaneous Multichannel Change
Internal Power On Reset
Industry-standard Pin Configuration
DESCRIPTION
The DAC8814 is a quad, 16-bit, current-output digi-
tal-to-analog converter (DAC) designed to operate
from a single +2.7 V to 5.0 V supply.
The applied external reference input voltage V
REF
determines the full-scale output current. An internal
feedback resistor (R
FB
) provides temperature tracking
for the full-scale output when combined with an
external I-to-V precision amplifier.
A doubled buffered serial data interface offers
high-speed, 3-wire, SPI and microcontroller compat-
ible inputs using serial data in (SDI), clock (CLK), and
a chip-select (CS). In addition, a serial data out pin
(SDO) allows for daisy-chaining when multiple pack-
ages are used. A common level-sensitive load DAC
strobe (LDAC) input allows simultaneous update of all
DAC outputs from previously loaded input registers.
Additionally, an internal power on reset forces the
output voltage to zero at system turn on. An MSB pin
allows system reset assertion (RS) to force all regis-
ters to zero code when MSB = 0, or to half-scale
code when MSB = 1.
The DAC8814 is available in an SSOP package.
V
REF
A B C D
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
A0
A1
APPLICATIONS
Automatic Test Equipment
Instrumentation
Digitally Controlled Calibration
R
FB
A
Input
Register
R
DAC A
Register
R
DAC A
I
OUT
A
A
GND
A
R
FB
B
16
Input
Register
R
DAC B
Register
R
DAC B
I
OUT
C
A
GND
B
R
FB
C
Input
Register
R
DAC C
Register
R
DAC C
I
OUT
C
A
GND
C
SDO
SDI
CS
CLK
EN
DAC A
B
C
D
2:4
Decode
Input
Register
R
DAC D
Register
R
DAC D
R
FB
D
I
OUT
D
A
GND
D
Power-on
Reset
A
GND
F
DGND
RS
MSB
LDAC
V
SS
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SPI is a trademark of Motorola, Inc.
PRODUCT PREVIEW information concerns products in the forma-
tive or design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the
right to change or discontinue these products without notice.
Copyright 漏 2005, Texas Instruments Incorporated
PRODUCT PREVIEW

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