AD8303_15 Datasheet, PDF (1/16 Pages) Analog Devices – 3 V, Dual, Serial Input Complete 12-Bit DAC

a
+3 V, Dual, Serial Input
Complete 12-Bit DAC
AD8303
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Complete Dual 12-Bit DAC
V_DD
Pretrimmed Internal Voltage Reference
Single +3 V Operation
0.5 mV/Bit with 2.0475 V Full Scale
Low Power: 9.6 mW
CS
En
CLK
R
E
DG
AI
DAC A
OP
AMP
A
CS
V_OUTA
3-Wire Serial SPI Compatible Interface
Power Shutdown I_DD < 1 ␮A
Compact SO-14, 1.75 mm Height Package
APPLICATIONS
Portable Communications
Digitally Controlled Calibration
E Servo Controls
T ^{PC Peripherals}
SDI
(DATA)
LDA
LDB
R
SE
HG
II
FS
TT
E
R
A
T
E
DR
PR
R
D^E
DG
AI
CS
B
T
E
R
PR
R
BE
AF
REF
BUF
NE
DR
GE
AN
PC
E
REF
BUF
DAC B
OP
AMP
B
AD8303
V_REF
V_OUTB
DGND MSB RS
AGND
SHDN
E _{GENERAL DESCRIPTION}
The AD8303 is a complete (includes internal reference) dual,
12-bit, voltage output digital-to-analog converter designed to
L operate from a single +3 volt supply. Built using a CBCMOS
process, this monolithic DAC offers the user low cost and ease-
of-use in single-supply +3 volt systems. Operation is guaranteed
over the supply voltage range of +2.7 V to +5.5 V making this
device ideal for battery operated applications.
O _{The 2.0475 V full-scale voltage output is laser-trimmed to}
maintain accuracy over the operating temperature range of the
device. The binary input data format provides an easy-to-use
S ^{one-half millivolt-per-bit software programmability. The voltage}
outputs are capable of sourcing 3 mA.
1.0
B ^0.8
VDD = +5V
TA = –40°C, +25°C, +85°C
0.6
0.4
0.2
O⁰
A double buffered serial data interface offers high speed, three-
wire, DSP and SPI microcontroller compatible inputs using
data in (SDI), clock (CLK) and load strobe (LDA + LDB)
pins. A chip-select (CS) pin simplifies connection of multiple
DAC packages by enabling the clock input when active low.
Additionally, an RS input sets the output to zero scale or to 1/2
scale based on the level applied to the MSB pin. A power
shutdown feature reduces power dissipation to less than 3 µW.
The AD8303 is specified over the extended industrial (–40°C to
+85°C) temperature range. AD8303s are available in plastic
DIP and low profile 1.75 mm height SO-14 surface mount
packages. For single-channel DAC applications, see the
AD8300 which is offered in the 8-lead DIP and SO-8 packages.
2
V_DD = +5V
1.5
–40°C
1
+25°C
0.5
0
–0.2
–0.5
–0.4
–0.6
–1
+85°C
–0.8
–1.5
–1.0
0
1024
2048
3072
4096
DIGITAL INPUT CODE – Decimal
–2
0
1024
2048
3072
4096
DIGITAL INPUT CODE – Decimal
Figure 1. Differential Nonlinearity Error vs. Code
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
Figure 2. Linearity Error vs. Digital Code and Temperature
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
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