IC DAC 12BIT BINARY 18-DIP

DAC1220LCN

Manufacturer Part NumberDAC1220LCN
DescriptionIC DAC 12BIT BINARY 18-DIP
ManufacturerNational Semiconductor
DAC1220LCN datasheet
 

Specifications of DAC1220LCN

Settling Time500nsNumber Of Bits12
Number Of Converters1Power Dissipation (max)30mW
Operating Temperature0°C ~ 70°CMounting TypeThrough Hole
Package / Case*Lead Free Status / RoHS StatusContains lead / RoHS non-compliant
Data Interface-Voltage Supply Source-
Other names*DAC1220LCN  
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DAC1020 DAC1021 DAC1022
10-Bit Binary Multiplying D A Converter
DAC1220 DAC1222
12-Bit Binary Multiplying D A Converter
General Description
The DAC1020 and the DAC1220 are respectively 10 and
12-bit binary multiplying digital-to-analog converters A de-
posited thin film R-2R resistor ladder divides the reference
current and provides the circuit with excellent temperature
tracking characteristics (0 0002% C linearity error temper-
ature coefficient maximum) The circuit uses CMOS current
switches and drive circuitry to achieve low power consump-
tion (30 mW max) and low output leakages (200 nA max)
The digital inputs are compatible with DTL TTL logic levels
as well as full CMOS logic level swings This part combined
with an external amplifier and voltage reference can be
used as a standard D A converter however it is also very
attractive for multiplying applications (such as digitally con-
trolled gain blocks) since its linearity error is essentially in-
dependent of the voltage reference All inputs are protected
from damage due to static discharge by diode clamps to V
and ground
This part is available with 10-bit (0 05%) 9-bit (0 10%) and
8-bit (0 20%) non-linearity guaranteed over temperature
Equivalent Circuit
Ordering Information
Temperature Range
0 05%
DAC1020LCN
Non-
0 10%
DAC1021LCN
Linearity
0 20%
DAC1022LCN
Package Outline
Temperature Range
0 05%
DAC1220LCN
Non-
Linearity
0 20%
DAC1222LCN
Package Outline
Note Devices may be ordered by either part number
C 1996 National Semiconductor Corporation
TL H 5689
(note 1 of electrical characteristics)
DAC1021 and DAC1022 are direct replacements for the 10-
bit resolution AD7520 and AD7530 and equivalent to the
AD7533 family The DAC1220 and DAC1222 are direct re-
placements for the 12-bit resolution AD7521 and AD7531
family
Features
Linearity specified with zero and full-scale adjust only
Y
Non-linearity guaranteed over temperature
Y
Integrated thin film on CMOS structure
Y
10-bit or 12-bit resolution
Y
Low power dissipation 10 mW
Y
Accepts variable or fixed reference
Y
a
4-quadrant multiplying capability
Y
Interfaces directly with DTL TTL and CMOS
Y
Fast settling time 500 ns typ
Y
Low feedthrough error
Y
Note Switches shown in digital high state
10-BIT D A CONVERTERS
0 C to 70 C
AD7520LN AD7530LN
DAC1020LCV
AD7520KN AD7530KN
AD7520JN AD7530JN
N16A
12-BIT D A CONVERTERS
0 C to 70 C
AD7521LN AD7531LN
DAC1220LCJ
AD7521JN AD7531JN
DAC1222LCJ
N18A
RRD-B30M96 Printed in U S A
May 1996
The DAC1020
15V typ
25V
V
25V
b
s
REF s
LSB
100 kHz typ
TL H 5689 – 1
40 C to 85 C
b
DAC1020LIV
V20A
40 C to
85 C
b
a
AD7521LD AD7531LD
AD7521JD AD7531JD
J18A
http
www national com

DAC1220LCN Summary of contents

  • Page 1

    ... DAC1020LCN Non- 0 10% DAC1021LCN Linearity 0 20% DAC1022LCN Package Outline Temperature Range 0 05% DAC1220LCN Non- Linearity 0 20% DAC1222LCN Package Outline Note Devices may be ordered by either part number C 1996 National Semiconductor Corporation TL H 5689 (note 1 of electrical characteristics) DAC1021 and DAC1022 are direct replacements for the 10- ...

  • Page 2

    ... All Digital Inputs Low OUT 2 All Digital Inputs High http www national com Operating Ratings (Note 5) Temperature (T DAC1020LIV DAC1220LCJ 17V DAC1222LCJ DAC1020LCN DAC1020LCV 25V g DAC1021LCN Gnd DAC1022LCN DAC1220LCN 100 DAC1222LCN 150 260 C 300 C 800V (V a 15V V 10 000V unless otherwise specified) e ...

  • Page 3

    Electrical Characteristics Parameter Conditions Digital Input (Figure 1) Low Threshold MIN MAX High Threshold MIN MAX Digital Input Current MIN MAX Digital ...

  • Page 4

    Typical Applications The following applications are also valid for 12-bit systems using the DAC1220 and 2 additional digital inputs Operational Amplifier Bias Current ( Figure 3 ) The op amp bias current I flows through the 15k internal b feedback ...

  • Page 5

    Typical Applications (Continued) FIGURE 5 Alternate Full-Scale Adjust (Allows Increasing or Decreasing the Gain OUT 1 REF OUT2 REF 2 where V can signal REF FIGURE 6 Precision Analog-to-Digital ...

  • Page 6

    Typical Applications (Continued A10 OUT REF 2 4 1024 1024 where input is high input is low e ...

  • Page 7

    Typical Applications (Continued OUT where V REF By connecting the DAC in the feedback loop of an opera- tional amplifier a linear digitally control gain block can be realized Note that with all digital inputs ...

  • Page 8

    Typical Applications (Continued) Output frequency Output voltage range THD Excellent amplitude and frequency stability with temperature Low pass filter shown has a 1 kHz corner (for output frequencies below 10 Hz filter corner should be reduced) Any ...

  • Page 9

    Typical Applications (Continued) MM74C00 NAND gates MM74C32 OR gates MM74C74 D flip-flop MM74C193 Binary up down counters Binary up down counter digitally ‘‘ramps’’ the DAC output Can stop counting at any desired 10-bit input code Senses up or down count ...

  • Page 10

    Definition of Terms Resolution Resolution is defined as the reciprocal of the number of discrete steps in the D A output It is directly related to the number of switches or bits within the D A For 10 example the ...

  • Page 11

    11 http www national com ...

  • Page 12

    Physical Dimensions inches (millimeters) unless otherwise noted Order Number DAC1220LCJ or DAC1222LCJ Order Number DAC1020LCN DAC1021LCN or DAC1022LCN http www national com Cavity Dual-In-Line Package (J) NS Package Number J18A Molded Dual-In-Line Package (N) NS Package Number N16A 12 ...

  • Page 13

    ... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number DAC1220LCN DAC1221LCN or DAC1222LCN Molded Dual-In-Line Package (N) NS Package Number N18A 13 http www national com ...

  • Page 14

    ... Floor Straight Block a Ocean Centre 5 Canton Rd 49 (0) 180-530 85 85 Tsimshatsui Kowloon a Tel 49 (0) 180-532 78 32 Hong Kong a 49 (0) 180-532 93 58 Tel (852) 2737-1600 a Tel 49 (0) 180-534 16 80 Fax (852) 2736-9960 a National Semiconductor Japan Ltd Tel 81-043-299-2308 Fax 81-043-299-2408 ...