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DAC1219 Datasheet

  • DAC1219

  • 12-Bit Binary Multiplying D/A Converter

  • 12頁(yè)

  • NSC

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DAC1218 DAC1219 12-Bit Binary Multiplying D A Converter
December 1994
DAC1218 DAC1219
12-Bit Binary Multiplying D A Converter
General Description
The DAC1218 and the DAC1219 are 12-bit binary 4-quad-
rant multiplying D to A converters The linearity differential
non-linearity and monotonicity specifications for these con-
verters are all guaranteed over temperature In addition
these parameters are specified with standard zero and full-
scale adjustment procedures as opposed to the impractical
best fit straight line guarantee
This level of precision is achieved though the use of an
advanced silicon-chromium (SiCr) R-2R resistor ladder net-
work This type of thin-film resistor eliminates the parasitic
diode problems associated with diffused resistors and al-
lows the applied reference voltage to range from
b
25V to
25V independent of the logic supply voltage
CMOS current switches and drive circuitry are used to
achieve low power consumption (20 mW typical) and mini-
mize output leakage current errors (10 nA maximum)
Unique digital input circuitry maintains TTL compatible input
threshold voltages over the full operating supply voltage
range
The DAC1218 and DAC1219 are direct replacements for
the AD7541 series AD7521 series and AD7531 series with
a significant improvement in the linearity specification In
applications where direct interface of the D to A converter to
a microprocessor bus is desirable the DAC1208 and
DAC1230 series eliminate the need for additional interface
logic
Features
Y
Y
Y
Y
Linearity specified with zero and full-scale adjust only
Logic inputs which meet TTL voltage level specs (1 4V
logic threshold)
Works with
g
10V reference full 4-quadrant
multiplication
All parts guaranteed 12-bit monotonic
Key Specifications
Y
Y
Y
Y
Y
Y
Current Settling Time
Resolution
Linearity (Guaranteed
over temperature)
Gain Tempco
Low Power Dissipation
Single Power Supply
1
ms
12 Bits
12 Bits (DAC1218)
11 Bits (DAC1219)
1 5 ppm C
20 mW
5 V
DC
to 15 V
DC
Typical Application
Connection Diagram
Dual-In-Line Package
TL H 5691 鈥?1
V
OUT
e b
V
REF

A1
A2
A3
a
a
a
2
4
8
A12
4096
J
Top View
TL H 5691 鈥?15
where AN
e
1 if digital input is high
AN
e
0 if digital input is low
Ordering Information
Temperature Range
Non
Linearity
0 012%
0 024%
0 C to
a
70 C
DAC1218LCJ-1
b
40 C to
a
85 C
Package Outline
J18A Cerdip
J18A Cerdip
DAC1218LCJ
DAC1219LCJ
BI-FET
TM
is a trademark of National Semiconductor Corp
C
1995 National Semiconductor Corporation
TL H 5691
RRD-B30M115 Printed in U S A

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