DAC0832LCN National Semiconductor, DAC0832LCN Datasheet

D/A Converter (D-A) IC

DAC0832LCN

Manufacturer Part Number
DAC0832LCN
Description
D/A Converter (D-A) IC
Manufacturer
National Semiconductor
Datasheet

Specifications of DAC0832LCN

Resolution (bits)
8bit
Data Interface
CMOS, Parallel, TTL
No. Of Pins
20
Settling Time
1µs
Mounting Type
Through Hole
Peak Reflow Compatible (260 C)
No
No. Of Bits
8 Bit
Leaded Process Compatible
No
Number Of Channels
1
Resolution
8b
Interface Type
Parallel
Single Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (typ)
Not RequiredV
Architecture
R-2R
Power Supply Requirement
Digital
Output Type
Current
Integral Nonlinearity Error
0.2LSB
Single Supply Voltage (min)
Not RequiredV
Single Supply Voltage (max)
Not RequiredV
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Through Hole
Pin Count
20
Package Type
PDIP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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0
© 2002 National Semiconductor Corporation
DAC0830/DAC0832
8-Bit µP Compatible, Double-Buffered D to A Converters
General Description
The DAC0830 is an advanced CMOS/Si-Cr 8-bit multiplying
DAC designed to interface directly with the 8080, 8048,
8085, Z80
silicon-chromium R-2R resistor ladder network divides the
reference current and provides the circuit with excellent
temperature tracking characteristics (0.05% of Full Scale
Range maximum linearity error over temperature). The cir-
cuit uses CMOS current switches and control logic to
achieve low power consumption and low output leakage
current errors. Special circuitry provides TTL logic input volt-
age level compatibility.
Double buffering allows these DACs to output a voltage
corresponding to one digital word while holding the next
digital word. This permits the simultaneous updating of any
number of DACs.
The DAC0830 series are the 8-bit members of a family of
microprocessor-compatible DACs (MICRO-DAC
Typical Application
BI-FET
Z80
®
is a registered trademark of Zilog Corporation.
and MICRO-DAC
®
, and other popular microprocessors. A deposited
are trademarks of National Semiconductor Corporation.
DS005608
).
Features
n Double-buffered, single-buffered or flow-through digital
n Easy interchange and pin-compatible with 12-bit
n Direct interface to all popular microprocessors
n Linearity specified with zero and full scale adjust
n Works with
n Can be used in the voltage switching mode
n Logic inputs which meet TTL voltage level specs (1.4V
n Operates “STAND ALONE” (without µP) if desired
n Available in 20-pin small-outline or molded chip carrier
Key Specifications
n Current settling time: 1 µs
n Resolution: 8 bits
n Linearity: 8, 9, or 10 bits (guaranteed over temp.)
n Gain Tempco: 0.0002% FS/˚C
n Low power dissipation: 20 mW
n Single power supply: 5 to 15 V
data inputs
DAC1230 series
only — NOT BEST STRAIGHT LINE FIT.
logic threshold)
package
±
10V reference-full 4-quadrant multiplication
00560801
DC
www.national.com
March 2002

Related parts for DAC0832LCN

DAC0832LCN Summary of contents

Page 1

... This permits the simultaneous updating of any number of DACs. The DAC0830 series are the 8-bit members of a family of microprocessor-compatible DACs (MICRO-DAC Typical Application BI-FET and MICRO-DAC are trademarks of National Semiconductor Corporation. ™ ™ Z80 ® registered trademark of Zilog Corporation. © 2002 National Semiconductor Corporation ...

Page 2

Connection Diagrams www.national.com (Top Views) Dual-In-Line and Small-Outline Packages Molded Chip Carrier Package 2 00560821 00560822 ...

Page 3

... LCV Differential Nonlinearity Zero and full scale adjusted Max −10V V REF DAC0830LJ & LCJ DAC0832LJ & LCJ DAC0830LCN, LCWM & LCV DAC0831LCN DAC0832LCN, LCWM & LCV Monotonicity −10V V REF +10V Gain Error Max Using Internal R −10V V REF Gain Error Tempco Max ...

Page 4

Electrical Characteristics V =10.000 V unless otherwise noted. Boldface limits apply over temperature, T REF DC T =25˚C. A Parameter CONVERTER CHARACTERISTICS Power Supply Rejection All digital inputs latched high V =14.5V to 15.5V CC 11.5V to 12.5V 4.5V to ...

Page 5

Electrical Characteristics V =10.000 V unless otherwise noted. Boldface limits apply over temperature, T REF DC T =25˚C. A Symbol Parameter Conditions AC CHARACTERISTICS Current Setting V =0V =5V IH Time t Write and XFER V ...

Page 6

Switching Waveform www.national.com 00560802 6 ...

Page 7

Definition of Package Pinouts Control Signals (All control signals level actuated) CS: Chip Select (active low). The CS in combination with ILE will enable ILE: Input Latch Enable (active high). The ILE in com- bination with CS ...

Page 8

Definition of Terms (Continued) Ideally, for the DAC0830 series, full scale is V For V = 10V and unipolar operation, V REF 10,0000V–39mV 9.961V. Full-scale error is adjustable to zero. Differential Nonlinearity: The difference between any two consecutive codes in ...

Page 9

Typical Performance Characteristics Gain and Linearity Error Variation vs. Supply Voltage 00560829 DAC0830 Series Application Hints These DAC’s are the industry’s first microprocessor compat- ible, double-buffered 8-bit multiplying converters. Double-buffering allows the utmost application flexibility from a ...

Page 10

DAC0830 Series Application Hints * TIE TO LOGIC 1 IF NOT NEEDED (SEE SEC. 1.1). The ILE pin is an active high chip select which can be decoded from the address bus as a qualifier for the normal CS signal ...

Page 11

DAC0830 Series Application Hints (Continued) Pulling WR low will then update the analog output. A logic 2 “1” on either of these lines will prevent the changing of the analog output. ILE=LOGIC “1”; WR2 and XFER GROUNDED 1.2 Single-Buffered Operation ...

Page 12

DAC0830 Series Application Hints 2.0 ANALOG CONSIDERATIONS The fundamental purpose of any converter is to provide an accurate analog output quantity which is repre- sentative of the applied digital word. In the case of the DAC0830, the ...

Page 13

DAC0830 Series Application Hints (Continued) Always use the internal R resistor to create an output fb voltage since this resistor matches (and tracks with tempera- ture) the value of the resistors used to generate the output current (I ). OUT1 ...

Page 14

DAC0830 Series Application Hints (Continued) 2.5 Zero Adjustment For accurate conversions, the input offset voltage of the output amplifier must always be nulled. Amplifier offset errors create an overall degradation of DAC linearity. The fundamental purpose of zeroing is to ...

Page 15

DAC0830 Series Application Hints Input Code MSB *THESE RESISTORS ARE AVAILABLE FROM BECKMAN INSTRUMENTS, INC. AS ...

Page 16

DAC0830 Series Application Hints This configuration offers several useful application advan- tages. Since the output is a voltage, an external op amp is not necessarily required but the output impedance of the DAC is fairly high (equal to the specified ...

Page 17

DAC0830 Series Application Hints FIGURE 13. Obtaining a Bipolar Output from a Fixed Reference with a Single Op Amp FIGURE 14. Bipolar Output with Increased Output Voltage Swing (Continued) 00560842 17 00560860 www.national.com ...

Page 18

DAC0830 Series Application Hints FIGURE 15. Single Supply DAC with Level Shift and Span- Adjustable Output Gain and Linearity Error Variation vs. Supply Voltage Note: For these curves the voltage applied to pin 11 (I REF pin 12 ...

Page 19

DAC0830 Series Application Hints (Continued) Gain and Linearity Error Variation vs. Temperature FIGURE 18. 2.8 Miscellaneous Application Hints These converters are CMOS products and reasonable care should be exercised in handling them to prevent catastrophic failures due to static discharge. ...

Page 20

Applications www.national.com DAC Controlled Amplifier (Volume Control) 20 00560843 ...

Page 21

Applications (Continued) Capacitance Multiplier 00560844 21 www.national.com ...

Page 22

Applications (Continued) Variable f www.national.com , Variable Q , Constant BW Bandpass Filter 00560817 ...

Page 23

Applications (Continued) DAC Controlled Function Generator 23 00560818 www.national.com ...

Page 24

Applications (Continued) Two Terminal Floating Current Loop Controller • DAC0830 linearly controls the current flow from the input terminal to the output terminal (for D=0) to 19.94 mA (for D=255). • Circuit ...

Page 25

... Input voltage must be positive (See section 2.7) Ordering Information Temperature Range 0.05% DAC0830LCN Non FSR Linearity 0.1% FSR DAC0831LCN 0.2% FSR DAC0832LCN Package Outline N20A — Molded DIP 0˚C to +70˚ DAC0830LCWM DAC0830LCV DAC0832LCWM DAC0832LCV M20B Small Outline V20A Chip Carrier 25 − ...

Page 26

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted Ceramic Dual-In-Line Package (J) Order Number DAC0830LCJ, DAC0830LJ, DAC0832LJ or DAC0832LCJ NS Package Number J20A 26 ...

Page 27

... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Molded Small Outline Package (M) Order Number DAC0830LCWM or DAC0832LCWM NS Package Number M20B Molded Dual-In-Line Package (N) Order Number DAC0830LCN, or DAC0832LCN NS Package Number N20A 27 www.national.com ...

Page 28

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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