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PDF DAC813KU Data sheet ( Hoja de datos )
| Número de pieza | DAC813KU | |
| Descripción | Microprocessor-Compatible 12-BIT DIGITAL-TO-ANALOG CONVERTER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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®
DAC813
DAC813
DAC813
Microprocessor-Compatible
12-BIT DIGITAL-TO-ANALOG CONVERTER
FEATURES
q ±1/2LSB NONLINEARITY OVER
TEMPERATURE
q GUARANTEED MONOTONIC OVER
TEMPERATURE
q LOW POWER: 270mW typ
q DIGITAL INTERFACE DOUBLE
BUFFERED: 12 AND 8 + 4 BITS
q SPECIFIED AT ±12V AND ±15V POWER
SUPPLIES
q RESET FUNCTION TO BIPOLAR ZERO
q 0.3" WIDE DIP AND SO PACKAGES
DESCRIPTION
The DAC813 is a complete monolithic 12-bit digital-
to-analog converter with a flexible digital interface.
It includes a precision +10V reference, interface con-
trol logic, double-buffered latch and a 12-bit D/A
converter with voltage output operational amplifier.
Fast current switches and laser-trimmed thin-film
resistors provide a highly accurate, fast D/A con-
verter.
Digital interfacing is facilitated by a double buffered
latch. The input latch consists of one 8-bit byte and
one 4-bit nibble to allow interfacing to 8-bit (right
justified format) or 16-bit data buses. Input gating
logic is designed so that the last nibble or byte to be
loaded can be loaded simultaneously with the transfer
of data to the D/A latch saving computer instructions.
A reset control allows the DAC813 D/A latch to
asynchronously reset the D/A output to bipolar zero,
a feature useful for power-up reset, recalibration, or
for system re-initialization upon system failure.
The DAC813 is specified to ±1/2LSB maximum lin-
earity error (J, A grades) and ±1/4LSB (K grade).
It is packaged in 28-pin 0.3" wide plastic DIP and
28-lead plastic SOIC
Reset
4 MSBs
Input Latch
4
D/A Latch
10V
Reference
49.5kΩ
VREF OUT
VREF IN
8 LSBs
Input Latch
8
12
12-Bit D/A
Converter
24.9kΩ
25kΩ
25kΩ
BPO
20V Span
20V Span
VOUT
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1990 Burr-Brown Corporation
PDS-11077G
DAC813Printed in U.S.A. March, 1998
®
1 page  
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VCC = ±15V, unless otherwise noted.
POWER SUPPLY REJECTION vs
POWER SUPPLY RIPPLE FREQUENCY
1k
+VCC
100
10
–VCC
1
0.1
10
100 1k 10k 100k 1M
Frequency (Hz)
4
2
0
–2
–4
–2
DIGITAL INPUT CURRENT
vs INPUT VOLTAGE
LLSB, WR
LMSB, LDAC
Reset
Data
0246
Input Voltage (V)
8
1
0.5
0
–0.5
CHANGE OF GAIN AND OFFSET ERROR
vs TEMPERATURE
0.8
Bipolar
Offset
0.4
Gain Error
Unipolar
Offset
0
–0.4
–1
–60
–20 20
60 100
Temperature (°C)
–0.8
140
INTEGRAL LINEARITY ERROR
0.5
0
–0.5
000
400 800 C00
Input Code (Hexidecimal)
FFF
15
10
5
0
–5
–10
–15
0
± FULL SCALE OUTPUT SWING
VOUT
WR
+5
0
5 10 15 20 25
Time (µs)
250
200
150
100
50
0
Data =
7FFH
MAJOR CARRY GLITCH
Data = 800H
Data = 7FFH
+10
0
–2 0 2 4 6 8 10 12 14
Time (µs)
®
5 DAC813
5 Page 
WR
A15 Base CS
Address
A4 Decoder
WR
LDAC DAC813
LLSB (1)
LMSB
A3
WR
74LS138
4
G2A
5
G2B
6 G1
Y0 15
Y1 14
Y2 13
Y3 12
Y4 11
LDAC DAC813
LLSB (2)
LMSB
Y5 10
WR
A2
A1
A0
3
C
2
B
1A
9
Y6
7
Y7
LDAC DAC813
LLSB (4)
LMSB
ADDRESS BUS
A3 A2 A1 A0
0 0 00
0 0 01
0 0 10
0 0 11
0 1 00
0 1 01
0 1 10
0 1 11
1 X XX
OPERATION
Load 8 LSB – D/A #1
Load 4 MSB – D/A #1
Load 8 LSB – D/A #2
Load 4 MSB – D/A #2
Load 8 LSB – D/A #3
Load 4 MSB – D/A #3
Load 8 LSB – D/A #4
Load 4 MSB – D/A #4
Load D/A Latch—All D/A
FIGURE 9. Interfacing Multiple DAC813s to an 8-Bit Bus.
®
11 DAC813
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet DAC813KU.PDF ] | |
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