ad7531jd National Semiconductor Corporation, ad7531jd Datasheet

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ad7531jd

Manufacturer Part Number
ad7531jd
Description
10-bit, 12-bit Binary Multiplying D/a Converter
Manufacturer
National Semiconductor Corporation
Datasheet
C 1996 National Semiconductor Corporation
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
Note Devices may be ordered by either part number
Temperature Range
Linearity
Linearity
Temperature Range
Non-
Non-
Package Outline
Package Outline
0 05%
0 20%
0 05%
0 10%
0 20%
DAC1220LCN
DAC1222LCN
TL H 5689
DAC1020LCN
DAC1021LCN
DAC1022LCN
Note Switches shown in digital high state
0 C to 70 C
10-BIT D A CONVERTERS
12-BIT D A CONVERTERS
N18A
AD7521LN AD7531LN
AD7521JN AD7531JN
N16A
AD7520KN AD7530KN
AD7520LN AD7530LN
AD7520JN AD7530JN
a
0 C to 70 C
(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
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Linearity specified with zero and full-scale adjust only
Non-linearity guaranteed over temperature
Integrated thin film on CMOS structure
10-bit or 12-bit resolution
Low power dissipation 10 mW
Accepts variable or fixed reference
4-quadrant multiplying capability
Interfaces directly with DTL TTL and CMOS
Fast settling time 500 ns typ
Low feedthrough error
RRD-B30M96 Printed in U S A
DAC1220LCJ
DAC1222LCJ
DAC1020LCV
b
40 C to
LSB
J18A
AD7521LD AD7531LD
AD7521JD AD7531JD
15V typ
V20A
100 kHz typ
a
b
85 C
http
25V
b
DAC1020LIV
The DAC1020
40 C to 85 C
s
www national com
V
REF s
TL H 5689 – 1
May 1996
25V

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ad7531jd Summary of contents

Page 1

... AD7521JN AD7531JN DAC1222LCJ N18A RRD-B30M96 Printed May 1996 The DAC1020 15V typ b s REF s 25V V 25V LSB 100 kHz typ TL H 5689 – DAC1020LIV V20A AD7521LD AD7531LD AD7521JD AD7531JD J18A http www national com ...

Page 2

Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Gnd V to Gnd REF Digital Input Voltage Range DC Voltage at Pin 1 or ...

Page 3

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

Page 6

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

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 ...

Page 8

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

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 ...

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

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Molded Plastic Leaded Chip Carrier (V) Order Number DAC1020LCV or DAC1020LIV LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE ...

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