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Teilenummer | DAC4814 |
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Beschreibung | Quad 12-Bit Digital-to-Analog Converter Serial Interface | |
Hersteller | Burr-Brown Corporation | |
Logo | ||
Gesamt 12 Seiten ® DAC4814
Quad 12-Bit Digital-to-Analog Converter
(Serial Interface)
FEATURES
q COMPLETE QUAD DAC —
INCLUDES INTERNAL REFERENCES AND
OUTPUT AMPLIFIERS
q GUARANTEED SPECIFICATIONS
OVER TEMPERATURE
q GUARANTEED MONOTONIC OVER
TEMPERATURE
q HIGH-SPEED SERIAL INTERFACE
(10MHz CLOCK)
q LOW POWER: 600mW (150mW/DAC)
q LOW GAIN DRIFT: 5ppm/°C
q LOW NONLINEARITY: ±1/2 LSB max
q UNIPOLAR OR BIPOLAR OUTPUT
q CLEAR/RESET TO UNIPOLAR OR
BIPOLAR ZERO
+VL 28
+VS 15
–VS 7
AGND 12
DGND 17
DESCRIPTION
The DAC4814 is one in a family of dual and quad 12-
bit digital-to-analog converters. Serial, 8-bit, 12-bit
interfaces are available.
The DAC4814 is complete. It contains CMOS logic,
switches, a high-performance buried-zener reference,
and low-noise bipolar output amplifiers. No external
components are required for either unipolar 0 to 10V,
0 to –10V, or bipolar ±10V output ranges.
The DAC4814 has a high-speed serial interface
capable of being clocked at 10MHz. Serial data are
clocked DAC D MSB first into a 48-bit shift register,
then strobed into each DAC separately or simulta-
neously as required. The DAC has an asynchronous
clear control for reset to unipolar or bipolar zero
depending on the mode selected. This feature is useful
for power-on reset or system calibration. The DAC4814
is packaged in a 28-pin plastic DIP rated for the –40°C
to +85°C extended industrial temperature range.
High-stability laser-trimmed thin film resistors assure
high reliability and true 12-bit integral and differential
linearity over the full specified temperature range.
Serial
Data and
Control In
Serial
Data 18
Out
Logic
DAC4814
10V
Ref
10kΩ
10kΩ
A5
DAC A
DAC B
DAC C
DAC D
20kΩ
20kΩ
A1
20kΩ
20kΩ
A2
20kΩ
20kΩ
A3
20kΩ
20kΩ
A4
4 +VREF Out
3 Inv In
11 Inv Out
10 VREF In
6 BPO A
2 VOUT A
5 BPO B
1 VOUT B
9 BPO C
14 VOUT C
8 BPO D
13 VOUT D
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 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1991 Burr-Brown Corporation
PDS-1111B
Printed in U.S.A. April, 1995
TYPICAL PERFORMANCE CURVES (CONT)
TA = +25°C, VS = ±12V or ±15V, VL = +5V unless otherwise noted.
SETTLING TIME
BIPOLAR (–10V to +10V)
SETTLING TIME
BIPOLAR (+10V to –10V Step)
+10V
+5V
0V
Time (1µs/div)
VOUT
LATCH
–10V
+5V
0V
Time (2µs/div)
V
OUT
LATCH
SETTLING TIME
UNIPOLAR (+10V to 0V STEP)
0V VOUT
+5V LATCH
0V
Time (1µs/div)
SETTLING TIME
UNIPOLAR (0V to +10V Step)
+10V
+5V
0V
Time (1µs/div)
V
OUT
LATCH
MAJOR CARRY GLITCH
0V VOUT
+5V
0V
Time (1µs/div)
NOTE: Data transition 800HEX to 7FFHEX.
LATCH
DIGITAL FEEDTHROUGH
0V VOUT
Time (500ns/div)
DAC output noise due to activity on digital inputs
with latch disabled.
®
DAC4814
6
6 Page +5V
+
1µF
28
+15V
+
1µF
15
–15V
1µF +
7
Serial
Data and
Control In
DAC4814
10V
Ref
DAC A
DAC B
DAC C
DAC D
20kΩ
20kΩ
A1
20kΩ
20kΩ
A2
20kΩ
20kΩ
A3
20kΩ
20kΩ
A4
4
10
6
2 VOUT A
5
1 VOUT B
9
14 VOUT C
8
13 VOUT D
Data
LATCH
CLK
DAC4814
22
Data In
23
CS
27
LATCH A
26
LATCH B
21
LATCH C
20
LATCH D
19
CLK
Data Out 18
DAC4814
22
Data In
CS 23
27
LATCH A
26
LATCH B
21
LATCH C
20
LATCH D
19
CLK
18
Data Out
To Other DACs
FIGURE 6. Cascaded Serial Bus Connection for Multiple
DAC Packages.
Data
LATCH 1
CLK
DAC4814
22
Data In
CS 23
27
LATCH A
26
LATCH B
21
LATCH C
20
LATCH D
19
CLK
18
Data Out
MODE 25
17
DGND
12
AGND
FIGURE 5. Analog Connections for 0 to –10V DAC Output.
LATCH 2
DAC4814
22
Data In
23
CS
27
LATCH A
26
LATCH B
21
LATCH C
20
LATCH D
19
CLK
18
Data Out
FIGURE 7. Parallel Bus Connection for Multiple DAC
Packages.
®
DAC4814
12
12 Page | ||
Seiten | Gesamt 12 Seiten | |
PDF Download | [ DAC4814 Schematic.PDF ] |
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