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PDF ( 数据手册 , 数据表 ) DAC712P

零件编号 DAC712P
描述 16-BIT DIGITAL-TO-ANALOG CONVERTER With 16-Bit Bus Interface
制造商 Burr-Brown Corporation
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DAC712P 数据手册, 描述, 功能
®
DAC712
DAC712
DAC712
16-BIT DIGITAL-TO-ANALOG CONVERTER
With 16-Bit Bus Interface
FEATURES
q HIGH-SPEED 16-BIT PARALLEL DOUBLE-
BUFFERED INTERFACE
q VOLTAGE OUTPUT: ±10V
q 13-, 14-, AND 15-BIT LINEARITY GRADES
q 16-BIT MONOTONIC OVER
TEMPERATURE (L GRADE)
q POWER DISSIPATION: 600mW max
q GAIN AND OFFSET ADJUST: Convenient
for Auto-Cal D/A Converters
q 28-LEAD DIP AND SOIC PACKAGES
DB0
DB15
DESCRIPTION
DAC712 is a complete 16-bit resolution D/A converter
with 16 bits of monotonicity over temperature.
DAC712 has a precision +10V temperature compen-
sated voltage reference, ±10V output amplifier and
16-bit port bus interface.
The digital interface is fast, 60ns minimum write pulse
width, is double-buffered and has a CLEAR function
that resets the analog output to bipolar zero.
GAIN and OFFSET adjustment inputs are arranged so
that they can be easily trimmed by external D/A
converters as well as by potentiometers.
DAC712 is available in two linearity error perfor-
mance grades: ±4LSB and ±2LSB and three differen-
tial linearity grades: ±4LSB, ±2LSB, and ±1LSB. The
DAC712 is specified at power supply voltages of
±12V and ±15V.
DAC712 is packaged in a 28-pin 0.3" wide plastic DIP
and in a 28-lead wide-body plastic SOIC. The
DAC712P, U, PB, UB, are specified over the –40°C to
+85°C temperature range and the DAC712PK, UK,
PL, UL are specified over the 0°C to +70°C range.
A1
A0
WR
CLR
Reference
Circuit
Input Latch
16
D/A Latch
16
16-Bit D/A Converter
VOUT
Gain Adjust
VREF OUT
+10V
Bipolar Offset Adjust
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
© 1994 Burr-Brown Corporation
PDS-1164G
Printed in U.S.A. May, 1998







DAC712P pdf, 数据表
Gain Adjust
6
170
15k
VREF OUT
5
+10V
Reference
+2.5V
CLR 9
A1 11
A0 12
WR 10
–VCC
D/A Switches
16-Bit D/A Latch
16-Bit Input Latch
+VCC
7
– VCC
8
250
9750
10k
4
Bipolar
Offset
Adjust
3 VOUT
28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 2
DB0 DB15 ACOM
LSB MSB
FIGURE 1. DAC712 Block Diagram.
1
DCOM
+VCC ESD Protection Circuit
Digital
Input
R = 1k: A0, A1, WR, CLR
3k: D0...D15
R
–VCC
6.8V
5pF
FIGURE 2. Equivalent Circuit of Digital Inputs.
OUTPUT VOLTAGE SWING
The output amplifier of DAC712 is committed to a ±10V
output range. DAC712 will provide a ±10V output swing
while operating on ±11.4V or higher voltage supplies.
GAIN AND OFFSET ADJUSTMENTS
Figure 3 illustrates the relationship of offset and gain adjust-
ments for a bipolar connected D/A converter. Offset should
be adjusted first to avoid interaction of adjustments. See
Table I for calibration values and codes. These adjustments
have a minimum range of ±0.3%.
+ Full Scale
1LSB
All Bits
Logic 0
Full Scale
Range
Range of
Gain Adjust
±0.3%
Gain Adjust
Rotates the Line
Range of
Offset Adjust
Offset Adj.
Translates
the Line
±0.3%
Bipolar
Offset
MSB on All
Others Off
– Full Scale
Digital Input
All Bits
Logic 1
FIGURE 3. Relationship of Offset and Gain Adjustments.
Offset Adjustment
Apply the digital input code that produces the maximum
negative output voltage and adjust the offset potentiometer
or the offset adjust D/A converter for –10V.
®
DAC712
8














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