AD8303 Analog Devices, AD8303 Datasheet

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AD8303

Manufacturer Part Number
AD8303
Description
+3 V, Dual, Serial Input Complete 12-Bit DAC
Manufacturer
Analog Devices
Datasheet

Specifications of AD8303

Resolution (bits)
12bit
Dac Update Rate
71kSPS
Dac Settling Time
14µs
Max Pos Supply (v)
+5.5V
Single-supply
Yes
Dac Type
Voltage Out
Dac Input Format
Ser,SPI

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD8303AR
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
AD8303ARZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
a
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.
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.
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 I
Compact SO-14, 1.75 mm Height Package
APPLICATIONS
Portable Communications
Digitally Controlled Calibration
Servo Controls
PC Peripherals
Figure 1. Differential Nonlinearity Error vs. Code
–0.2
–0.4
–0.6
–0.8
–1.0
1.0
0.8
0.6
0.4
0.2
0
0
DIGITAL INPUT CODE – Decimal
DD
1024
< 1 A
V
T
DD
A
= –40 C, +25 C, +85 C
= +5V
2048
3072
4096
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 W.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Figure 2. Linearity Error vs. Digital Code and Temperature
(DATA)
CLK
LDA
LDB
CS
SDI
En
FUNCTIONAL BLOCK DIAGRAM
–0.5
–1.5
1.5
0.5
S
H
F
T
I
–1
–2
2
1
0
+3 V, Dual, Serial Input
DGND
R
E
G
S
E
R
T
I
0
Complete 12-Bit DAC
DIGITAL INPUT CODE – Decimal
1024
MSB
D
D
P
P
D
A
C
A
D
A
C
B
+85 C
R
R
R
E
G
S
E
R
R
E
G
S
E
R
T
T
I
I
–40 C
RS
V
2048
DD
B
A
N
D
G
A
P
DAC A
DAC B
R
E
F
E
R
E
N
C
E
© Analog Devices, Inc., 1996
+25 C
AD8303
V
3072
AGND
DD
REF
BUF
REF
BUF
= +5V
AD8303
AMP
AMP
OP
OP
B
A
Fax: 617/326-8703
4096
SHDN
V
V
V
OUTA
REF
OUTB

Related parts for AD8303

AD8303 Summary of contents

Page 1

... Additionally 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 W. The AD8303 is specified over the extended industrial (– +85 C) temperature range. AD8303s are available in plastic DIP and low profile 1.75 mm height SO-14 surface mount packages ...

Page 2

... AD8303–SPECIFICATIONS +3 V OPERATION (@ +3.6 V, – Parameter STATIC PERFORMANCE 2 Resolution 2 Relative Accuracy 2 Differential Nonlinearity 2 Differential Nonlinearity Zero-Scale Error 3 Full-Scale Voltage 3, 4 Full-Scale Tempco ANALOG OUTPUTS Output Current Output Resistance to GND 4 Capacitive Load REFERENCE OUTPUT Output Voltage LOGIC INPUTS Logic Input Low Voltage ...

Page 3

... 2.7 3.0 5 + 2.1 3.4 10.5 17 0.001 0.004 %/% AD8303 Units Bits LSB LSB LSB mV ppm ...

Page 4

... Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Model + 0 AD8303AN – MAX A JA AD8303AR The AD8303 contains 700 transistors. The die size measures 70 mil ) . . . . . . . . . . . 150 C D10 CSS t ...

Page 5

... MSB (Not to Scale LDB CLK 6 LDA SDI 7 8 –5– AD8303 DAC Register Function Latched Latched Latched Latched Updated with Current Shift Register Contents Transparent Loaded with 800 H Latched with 800 H Loaded with All Zeros Latched All Zeros No Effect ...

Page 6

... AD8303–Typical Performance Characteristics 120 POSITIVE V = +5V CURRENT DD 80 LIMIT 40 DATA = 800 TIED TO L +1.024V –40 NEGATIVE –80 CURRENT LIMIT –120 OUTPUT VOLTAGE – Volts Figure 4. I vs. V OUT OUT + DATA = 800 +3V ...

Page 7

... TEMPERATURE – C Figure 17. Supply Current vs. Temperature 500mV 100 90 V OUT 10 0% SHDN 1µs 5V Figure 20. Shutdown Recovery Time –7– AD8303 +2. 212 UNITS 1 0.5 FULL SCALE (DATA = FFF ) H 0 –0.5 ZERO SCALE (DATA = 000 ) H –1 0 100 200 ...

Page 8

... AD8303 THEORY OF OPERATION The AD8303 is a complete, ready-to-use, dual, 12-bit digital-to- analog converter. Only one +2 +5.5 V power supply is necessary for operation. It contains two voltage-switched, 12-bit, laser-trimmed digital-to-analog converters, a curvature- corrected bandgap reference, rail-to-rail output op amps, input shift register, and two DAC registers. The serial data interface consists of a serial data input (SDI), clock (CLK), chip select (CS) and two DAC load strobe pins (LDA and LDB) ...

Page 9

... AD8303 power supply. If this mode of interface is used, make sure that the V of the 5 V CMOS meets the V AD8303 operating See Figure 6 for a graph for digital logic input threshold versus operating V +5V 10-22µF 0.1µ ...

Page 10

... C sends two 8-bit bytes, the MSBs are ignored (Figure 28). The CLK pin is only enabled when Chip Select (CS) is low. If only one AD8303 is connected to a serial data bus, then CS can be tied (hardwired) to ground. BYTE 1 ...

Page 11

... Figure 29. Unipolar Output Operation UNIPOLAR OUTPUT OPERATION This is the basic mode of operation for the AD8303. As shown in Figure 29, the AD8303 has been designed to drive loads as low parallel with 500 pF. The code table for this operation is shown in Table II. Table II. Unipolar Code Table ...

Page 12

... Voltage (V) ignored. This feature is valuable because most Cs only transmit data in 8-bit increments. Thus, the C sends 16 bits to the DAC 2.047 instead of 12 bits. The AD8303 will only respond to the last 12 0.001 bits clocked into the SDI input, however, so the serial data 0 interface is not affected. ...

Page 13

... C I/O pin. The MSB pin can be hardwired AD8303 ground, depending on whether a reset half DD scale is required. If the AD8303 is the only device on the serial interface, CS can also be tied to ground. Finally, SHDN can be tied Software for the interface of Figure 34 is shown in Figure 35. ...

Page 14

... SEND_IT MOV SHIFTREG,DAC_VAL0 ACALL SEND_IT MOV A,PORT1 ANL A,DAC_ADDR MOV PORT1,A ORL A,#00000011B MOV PORT1,A RET ; ;Convert the byte to LSB-first format and send it to the AD8303 SEND_IT: MOV LOOPCOUNT,#8 BYTESWAP: MOV A,SHIFTREG RLC A MOV SHIFTREG,A MOV A,SENDBYTE RRC A MOV SENDBYTE,A DJNZ ...

Page 15

... BSC 14-Lead Narrow Body SOIC (R-14) 0.3444 (8.75) 0.3367 (8.55 0.1574 (4.00) 0.2440 (6.20) 0.1497 (3.80 0.2284 (5.80) 0.0688 (1.75) PIN 1 0.0196 (0.50) 0.0098 (0.25) 0.0532 (1.35) 0.0099 (0.25) 0.0040 (0.10) 8 0.0500 0.0192 (0.49) 0 SEATING 0.0099 (0.25) (1.27) 0.0138 (0.35) PLANE BSC 0.0075 (0.19) –15– AD8303 0.195 (4.95) 0.115 (2.93) 0.015 (0.38) 0.008 (0.20 0.0500 (1.27) 0.0160 (0.41) ...

Page 16

... AD8303 –16– REV. 0 ...

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