DAC8802
DAC8802
www.ti.com
SBAS351A–AUGUST 2005–REVISED DECEMBER 2005
Dual, Serial Input 14-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
Separate 4Q Multiplying Reference Inputs
Reference Bandwidth: 10 MHz
Reference Dynamics: –105 dB THD
SPI™-Compatible 3-Wire Interface:
50 MHz
Double Buffered Registers Enable
Simultaneous Multichannel Change
Internal Power-On Reset
The DAC8802 is
digital-to-analog converter (DAC) designed to operate
from a single +2.7 V to 5.5 V supply.
a dual, 14-bit, current-output
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
high-speed, 3-wire, SPI and microcontroller
compatible inputs using serial data in (SDI), clock
(CLK), and
a
chip-select (CS).
A
common
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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 registers to zero code
when MSB = 0, or to half-scale code when MSB = 1.
Industry-Standard Pin Configuration
APPLICATIONS
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Automatic Test Equipment
Instrumentation
The DAC8802 is available in an TSSOP-16 package.
Digitally Controlled Calibration
V
REF
A B
D0
D1
D2
D3
R
A
FB
14
Input
DAC A
D4
D5
I
A
DAC A
OUT
Register
Register
R
R
D6
A
GND
A
D7
D8
D9
D10
D11
D12
D13
A0
R
B
FB
Input
DAC B
DAC B
I
B
OUT
SDI
Register
R
Register
R
A1
A
GND
B
CS
CLK
EN
A
DAC
Power-On
Reset
B
Decode
DGND
RS
MSB
LDAC
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005, Texas Instruments Incorporated