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Analog Devices Semiconductor Electronic Components Datasheet

AD8303 Datasheet

+3 V/ Dual/ Serial Input Complete 12-Bit DAC

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AD8303 pdf
a
FEATURES
Complete Dual 12-Bit DAC
Pretrimmed Internal Voltage Reference
Single +3 V Operation
0.5 mV/Bit with 2.0475 V Full Scale
Low Power: 9.6 mW
3-Wire Serial SPI Compatible Interface
Power Shutdown IDD < 1 A
Compact SO-14, 1.75 mm Height Package
APPLICATIONS
Portable Communications
Digitally Controlled Calibration
Servo Controls
PC Peripherals
+3 V, Dual, Serial Input
Complete 12-Bit DAC
AD8303
CS
CLK
SDI
(DATA)
LDA
LDB
FUNCTIONAL BLOCK DIAGRAM
VDD
En
R
SE
HG
II
FS
TT
E
R
R
E
DG
AI
CS
A
T
E
DR
PR
R
DE
DG
AI
CS
B
T
E
R
PR
DAC A
OP
AMP
A
R
BE
AF
REF
BUF
NE
DR
GE
AN
PC
E
REF
BUF
DAC B
OP
AMP
B
AD8303
VOUTA
VREF
VOUTB
DGND MSB RS
AGND
SHDN
GENERAL DESCRIPTION
The AD8303 is a complete (includes internal reference) dual,
12-bit, voltage output digital-to-analog converter designed to
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.
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
one-half millivolt-per-bit software programmability. The voltage
outputs are capable of sourcing 3 mA.
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
VDD = +5V
TA = –40°C, +25°C, +85°C
1024
2048
3072
4096
DIGITAL INPUT CODE – Decimal
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
1.5
1
0.5
0
–0.5
–1
–1.5
–2
0
–40°C
VDD = +5V
+25°C
+85°C
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.
Tel: 617/329-4700
Fax: 617/326-8703


Analog Devices Semiconductor Electronic Components Datasheet

AD8303 Datasheet

+3 V/ Dual/ Serial Input Complete 12-Bit DAC

No Preview Available !

AD8303 pdf
AD8303–SPECIFICATIONS
+3 V OPERATION (@ VDD = +2.7 V to +3.6 V, –40؇C TA +85؇C, unless otherwise noted)
Parameter
Symbol Condition
Min Typ1 Max Units
STATIC PERFORMANCE
Resolution2
Relative Accuracy2
Differential Nonlinearity2
Differential Nonlinearity2
Zero-Scale Error
Full-Scale Voltage3
Full-Scale Tempco3, 4
ANALOG OUTPUTS
Output Current
Output Resistance to GND
Capacitive Load4
REFERENCE OUTPUT
Output Voltage
N
INL
DNL
DNL
VZSE
VFS
TCVFS
IOUT
ROUT
CL
VREF
Monotonic, TA = +25°C
Monotonic
Data = 000H
Data = FFFH2
Data = 800H, VOUT < 3 mV
Data = 000H
No Oscillation3
Load > 1 M
12 Bits
–2 ±1/2 +2 LSB
–3/4 ±1/4 +3/4 LSB
–1 ±1/2 +1 LSB
1.25 +4.5 mV
2.039 2.0475 2.056 Volts
16 ppm/°C
±3 mA
30
500 pF
1V
LOGIC INPUTS
Logic Input Low Voltage
Logic Input High Voltage
Input Leakage Current
Input Capacitance4
VIL
VIH
IIL
CIL
INTERFACE TIMING SPECIFICATIONS4, 5
Clock Width High
Clock Width Low
Load Pulse Width
Data Setup
Data Hold
Reset Pulse Width
Load Setup
Load Hold
Select
Deselect
tCH
tCL
tLDW
tDS
tDH
tRS
tLD1
tLD2
tCSS
tCSH
AC CHARACTERISTICS4
Voltage Output Settling Time6
Voltage Output Settling Time6
Shutdown Recovery Time
Output Slew Rate
tS
tS
tDSR
SR
DAC Glitch
Q
Digital Feedthrough
Q
To ±0.1% of Full Scale
To ±1 LSB of Final Value
To ±0.1% of Full Scale
Data = 000H to FFFH to 000H
0.6 V
2.1 V
10 µA
10 pF
40 ns
40 ns
40 ns
15 ns
15 ns
40 ns
15 ns
40 ns
40 ns
40 ns
4 µs
14 µs
10 µs
2.0 V/µs
15 nV/s
15 nV/s
SUPPLY CHARACTERISTICS
Power Supply Range
Shutdown Current
Supply Current7
Power Dissipation
Power Supply Sensitivity
VDD RANGE DNL < ± 1 LSB
IDD_SD
SHDN = 0, No Load, VIL = 0 V, TA = +25°C
IDD VDD = 3 V, VIL = 0 V, No Load
PDISS
VDD = 3 V, VIL = 0 V, No Load
PSS VDD = ± 5%
2.7
0.02
2
6
0.001
5.5 V
1 µA
3.2 mA
9.6 mW
0.004 %/%
NOTES
1Typical readings represent the average value of room temperature operation.
21 LSB = 0.5 mV for 0 V to +2.0475 V output range. The first two codes (000 H, 001H) are excluded from the linearity error measurement.
3Includes internal voltage reference error.
4These parameters are guaranteed by design and not subject to production testing.
5All input control signals are specified with tR = tF = 2 ns (10% to 90% of +3 V) and timed from a voltage level of 1.6 V.
6The settling time specification does not apply for negative going transitions within the last 6 LSBs of ground.
7See Figure 6 for a plot of incremental supply current consumption as a function of the digital input voltage levels.
Specifications subject to change without notice.
–2– REV. 0


Part Number AD8303
Description +3 V/ Dual/ Serial Input Complete 12-Bit DAC
Maker Analog Devices
Total Page 16 Pages
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