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參數資料
| 型號： | AD760 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 16/18-Bit Self-Calibrating Serial/Byte DACPORT(16/18位自校準單片D/A轉換器) |
| 中文描述： | 16/18-Bit自校準串行/字節DACPORT（16/18位自校準單片的D / A轉換器） |
| 文件頁數： | 1/12頁 |
| 文件大小： | 333K |
| 代理商： | AD760 |
FUNCTIONAL BLOCK DIAGRAM
REV. A
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.
a
16/18-Bit Self-Calibrating
Serial/Byte DACPORT
AD760
Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
FEATURES
±0.2 LSB (±0.00031%) Typ Peak DNL and INL
±0.5 LSB (±0.00076%) Typ Unipolar Offset, Bipolar Zero
17-Bit Monotonicity Guaranteed
18-Bit Resolution (in Serial Mode)
Complete 16/18-Bit D/A Function
On-Chip Output Amplifier
On-Chip Buried Zener Voltage Reference
Microprocessor Compatible
Serial or Byte Input
Double Buffered Latches
Asynchronous Clear Function
Serial Output Pin Facilitates Daisy Chaining
Pin Strappable Unipolar or Bipolar Output
Low THD+N: 0.005%
MUX Output Control on Power-Up and Supply Glitches
+10V
REF
10k
S
OUT
SPAN/
BIP
OFF
V
OUT
9.95k
LDAC
REF IN
REF OUT
HBE
SER
CLR
10k
AD760
UNI
/
BIP CLR
OR
LBE
MUX
OUT
MUX
IN
AGND
S
IN
OR
DB0
DB2
DB7
CS
MSB/
LSB
OR
DB1
12
18/16
SERIAL
OR
24
23
15
27
28
22
25
17
18
20
21
19
MAIN DAC
C
L
16
26
RAM
CALIBRATION SEQUENCER
CALOK
–V
EE
+V
CC
+V
LL
DGND
CAL
1
2
3
5
6
4
14
16/18-BIT
INPUT REGISTER
13
7
CALIBRATION DAC
16/18-BIT DAC LATCH
Typical Integral Nonlinearity
DACPORT is a registered trademark of Analog Devices, Inc.
0.75
0.25
0
–0.25
–0.75
0
16384
32768
49152
65535
INPUT CODE – Decimal
R
V
OUT
= –10V TO +10V
R
L
= 2k
C
L
= 1000pF
MUX output in a predetermined state by means of a digital and
analog power supply detection circuit. This is particularly use-
ful for robotic and industrial control applications.
The AD760 is available in a 28-pin, 600 mil cerdip package.
The AQ version is specified from –40°C to +85°C.
PRODUCT DESCRIPTION
The AD760 is a complete 16/18-bit self-calibrating monolithic
DAC (DACPORT) with onboard voltage reference, double
buffered latches and output amplifier. It is manufactured on
Analog Devices’ BiMOS II process. This process allows the fab-
rication of low power CMOS logic functions on the same chip
as high precision bipolar linear circuitry.
Self-calibration is initiated by simply pulsing the
CAL
pin low.
The CALOK pin indicates when calibration has been success-
fully completed. The output multiplexer (MUX
OUT
) can be used
to send the output to the bottom of the output range during
calibration.
Data can be loaded into the AD760 as straight binary, serial
data or as two 8-bit bytes. In serial mode, 16-bit or 18-bit data
can be used and the serial mode input format is pin selectable,
to be MSB or LSB first. This is made possible by three digital
input pins which have dual functions (Pins 12, 13, and 14). In
byte mode the user can similarly define whether the high byte or
low byte is loaded first. The serial output (S
OUT
) pin allows the
user to daisy chain several AD760s by shifting the data through
the input latch into the next DAC thus minimizing the number
of control lines required in a multiple DAC application. The
double buffered latch structure eliminates data skew errors and
provides for simultaneous updating of DACs in a multi-DAC
system.
The asynchronous
CLR
function can be configured to clear the
output to minus full-scale or midscale depending on the state of
Pin 17 when
CLR
is strobed. The AD760 also powers up with the
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