DAC8814
www.ti.com
SBAS338–JANUARY 2005
Quad, Serial Input 16-Bit Multiplying Digital-to-Analog Converter
FEATURES
DESCRIPTION
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Relative Accuracy: 1 LSB Max
Differential Nonlinearity: 1 LSB Max
2-mA Full-Scale Current ±20%,
with VREF = ±10 V
0.5 µs Settling Time
Midscale or Zero-Scale Reset
Four Separate 4Q Multiplying Reference
Inputs
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 VREF
determines the full-scale output current. An internal
feedback resistor (RFB) provides temperature tracking
for the full-scale output when combined with an
external I-to-V precision amplifier.
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A
doubled buffered serial data interface offers
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Reference Bandwidth: 10 MHz
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.
Reference Dynamics: -105 dB THD
SPI™-Compatible 3-Wire Interface:
50 MHz
Double Buffered Registers Enable
Simultaneous Multichannel Change
Internal Power On Reset
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Industry-standard Pin Configuration
APPLICATIONS
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Automatic Test Equipment
Instrumentation
The DAC8814 is available in an SSOP package.
Digitally Controlled Calibration
A
B C D
V
REF
D0
D1
R A
FB
SDO
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
A0
Input
Register
DAC A
Register
DAC A
DAC B
DAC C
DAC D
I
A
OUT
R
R
R
R
R
R
A
A
GND
R
B
FB
Input
Register
DAC B
Register
16
I
C
OUT
A
B
GND
R
I
C
FB
Input
Register
DAC C
Register
C
OUT
SDI
CS
A1
A
C
GND
R
D
FB
CLK
EN
Input
Register
DAC D
Register
I
D
OUT
R
R
A
DAC
B
C
D
A
D
GND
2:4
Power-on
Reset
A
F
GND
Decode
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 © 2005, Texas Instruments Incorporated