DAC8803 Datasheet, PDF (1/30 Pages) Texas Instruments – Quad, Current Output, Serial Input 14-Bit Multiplying Digital-to-Analog Converter

DAC8803
www.ti.com
SBAS340A – JANUARY 2005 – REVISED APRIL 2005
Quad, Current Output, Serial Input 14-Bit Multiplying Digital-to-Analog Converter
FEATURES
• Relative Accuracy: 1 LSB Max
• Differential Nonlinearity: 1 LSB Max
• 2-mA Full-Scale Current ±20%,
With V_REF = ±10 V
• 0.5-µs Settling Time
• Midscale or Zero-Scale Reset
• Four Separate 4-Quadrant Multiplying
Reference Inputs
• Reference Bandwidth: 10 MHz
• Reference Dynamics: -105 dB THD
• 50-MHz SPI™-Compatible 3-Wire Interface
• Double Buffered Registers Enable
• Simultaneous Multichannel Update
• Internal Power On Reset
• Compact SSOP-28 Package
• Industry-Standard Pin Configuration
APPLICATIONS
• Automatic Test Equipment
• Instrumentation
• Digitally Controlled Calibration
SDO
SDI
CS
CLK
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9 ₁₆
D10
D11
D12
D13
A0
A1
EN
DAC ^A
B
C
D
2:4
Decode
Input
Register R
Input
Register R
Input
Register R
Input
Register R
Power-on
Reset
DESCRIPTION
The DAC8803 is a quad, 14-bit, current-output digi-
tal-to-analog converter (DAC) designed to operate
from a single 2.7 V to 5-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 DAC8803 is packaged in a SSOP package.
VREFA B C D
DAC A
Register R
DAC A
DAC B
Register R
DAC B
DAC C
Register R
DAC C
DAC D
Register R
DAC D
RFBA
IOUTA
AGNDA
RFBB
IOUTC
AGNDB
RFBC
IOUTC
AGNDC
RFBD
IOUTD
AGNDD
AGNDF
DGND
RS MSB
LDAC
VSS
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.
All trademarks are the property of their respective owners.
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