Datasheet DAC0802LCN, DAC0802LCMX, DAC0802LCM Datasheet (NSC)

DAC0800/DAC0802
8-Bit Digital-to-Analog Converters

General Description

The DAC0800 series are monolithic 8-bit high-speed
current-output digital-to-analog converters (DAC) featuring
typical settling times of 100 ns. When used as a multiplying
DAC, monotonic performance over a 40 to 1 reference cur­rent range is possible. The DAC0800 series also features
high compliance complementary current outputs to allow dif­ferential output voltagesof20Vp-p with simple resistor loads
as shown in

Figure 1

. The reference-to-full-scale current

matching of better than

±

1 LSB eliminates the need for
full-scale trims in most applications while the nonlinearities
of better than

±

0.1%over temperature minimizes system er-

ror accumulations.
The noise immune inputs of the DAC0800 series will accept

TTL levels with the logic threshold pin, V

LC

, grounded.

Changing the V

LC

potential will allow direct interface to other
logic families. The performance and characteristics of the
device are essentially unchanged over the full

±

4.5V to

±

18V power supply range; power dissipation is only 33 mW

with

±

5V supplies and is independent of the logic input

states.

The DAC0800, DAC0802, DAC0800C and DAC0802C are a
direct replacement for the DAC-08, DAC-08A, DAC-08C,
and DAC-08H, respectively.

Features

n Fast settling output current: 100 ns
n Full scale error:

±

1 LSB

n Nonlinearity over temperature:

±

0.1

%

n Full scale current drift:

±

10 ppm/˚C

n High output compliance: −10V to +18V
n Complementary current outputs
n Interface directly with TTL, CMOS, PMOS and others
n 2 quadrant wide range multiplying capability
n Wide power supply range:

±

4.5V to±18V

n Low power consumption: 33 mW at

±

5V

n Low cost

Typical Applications

Ordering Information

Non-Linearity Temperature Order Numbers

Range J Package (J16A) (Note 1) N Package (N16E) (Note 1) SO Package (M16A)

±

0.1%FS 0˚C ≤ TA≤ +70˚C DAC0802LCJ DAC-08HQ DAC0802LCN DAC-08HP DAC0802LCM

±

0.19%FS −55˚C ≤ TA≤ +125˚C DAC0800LJ DAC-08Q

±

0.19%FS 0˚C ≤ TA≤ +70˚C DAC0800LCJ DAC-08EQ DAC0800LCN DAC-08EP DAC0800LCM

Note 1: Devices may be ordered by using either order number.

DS005686-1

FIGURE 1.±20 V

P-P

Output Digital-to-Analog Converter (Note 5)

June 1999

DAC0800/DAC0802 8-Bit Digital-to-Analog Converters

© 1999 National Semiconductor Corporation DS005686 www.national.com

Absolute Maximum Ratings (Note 2)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Supply Voltage (V

+−V−

)

±

18V or 36V
Power Dissipation (Note 3) 500 mW
Reference Input Differential Voltage

(V14 to V15) V

−

to V

+

Reference Input Common-Mode

Range (V14, V15) V

−

to V

+

Reference Input Current 5 mA
Logic Inputs V

−

to V−plus 36V

Analog Current Outputs

(V

S

−=−15V) 4.25 mA

ESD Susceptibility (Note 4) TBD V

Storage Temperature −65˚C to +150˚C
Lead Temp. (Soldering, 10 seconds)

Dual-In-Line Package (plastic) 260˚C
Dual-In-Line Package (ceramic) 300˚C
Surface Mount Package

Vapor Phase (60 seconds) 215˚C
Infrared (15 seconds) 220˚C

Operating Conditions (Note 2)

Min Max Units

Temperature (T

A

)
DAC0800L −55 +125 ˚C
DAC0800LC 0 +70 ˚C
DAC0802LC 0 +70 ˚C

Electrical Characteristics

The following specifications apply for V

S

=

±

15V, I

REF

=

2 mA and T

MIN

≤ TA≤ T

MAX

unless otherwise specified. Output

characteristics refer to both I

OUT

and I

OUT

.

DAC0802LC DAC0800L/

Symbol Parameter Conditions DAC0800LC Units

Min Typ Max Min Typ Max

Resolution 888888Bits
Monotonicity 888888Bits
Nonlinearity

±

0.1

±

0.19%FS

t

s

Settling Time To

±

1

⁄2LSB, All Bits Switched 100 135 ns

“ON” or “OFF”, T

A

=

25˚C
DAC0800L 100 135 ns
DAC0800LC 100 150 ns

tPLH, Propagation Delay T

A

=

25˚C

tPHL Each Bit 35 60 35 60 ns

All Bits Switched 35 60 35 60 ns

TCI

FS

Full Scale Tempco

±

10

±

50

±

10

±

50 ppm/˚C

V

OC

Output Voltage Compliance Full Scale Current Change −10 18 −10 18 V

<

1

⁄2LSB, R

OUT

>

20 MΩ Typ

I

FS4

Full Scale Current V

REF

=

10.000V, R14=5.000 kΩ 1.984 1.992 2.000 1.94 1.99 2.04 mA

R15=5.000 kΩ,T

A

=

25˚C

I

FSS

Full Scale Symmetry I

FS4−IFS2

±

0.5±4.0

±

1

±

8.0 µA

I

ZS

Zero Scale Current 0.1 1.0 0.2 2.0 µA

I

FSR

Output Current Range V

−

=

−5V 0 2.0 2.1 0 2.0 2.1 mA

V

−

=

−8V to −18V 0 2.0 4.2 0 2.0 4.2 mA

Logic Input Levels

V

IL

Logic “0” V

LC

=

0V 0.8 0.8 V

V

IH

Logic “1” 2.0 2.0 V

Logic Input Current V

LC

=

0V

I

IL

Logic “0” −10V≤VIN≤+0.8V −2.0 −10 −2.0 −10 µA

I

IH

Logic “1” 2V≤VIN≤+18V 0.002 10 0.002 10 µA

V

IS

Logic Input Swing V

−

=

−15V −10 18 −10 18 V

V

THR

Logic Threshold Range V

S

=

±

15V −10 13.5 −10 13.5 V

I

15

Reference Bias Current −1.0 −3.0 −1.0 −3.0 µA

dl/dt Reference Input Slew Rate (

Figure 11

) 4.0 8.0 4.0 8.0 mA/µs

PSSI

FS+

Power Supply Sensitivity 4.5V≤V+≤18V 0.0001 0.01 0.0001 0.01

%/%

PSSI

FS−

−4.5V≤V−≤18V 0.0001 0.01 0.0001 0.01

%/%

I

REF

=

1mA

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Electrical Characteristics (Continued)

The following specifications apply for V

S

=

±

15V, I

REF

=

2 mA and T

MIN

≤ TA≤ T

MAX

unless otherwise specified. Output

characteristics refer to both I

OUT

and I

OUT

.

DAC0802LC DAC0800L/

Symbol Parameter Conditions DAC0800LC Units

Min Typ Max Min Typ Max

Power Supply Current V

S

=

±

5V, I

REF

=

1mA
I+ 2.3 3.8 2.3 3.8 mA
I− −4.3 −5.8 −4.3 −5.8 mA

V

S

=

5V, −15V, I

REF

=

2mA
I+ 2.4 3.8 2.4 3.8 mA
I− −6.4 −7.8 −6.4 −7.8 mA

V

S

=

±

15V, I

REF

=

2mA
I+ 2.5 3.8 2.5 3.8 mA
I− −6.5 −7.8 −6.5 −7.8 mA
P

D

Power Dissipation

±

5V, I

REF

=

1mA 3348 3348mW

5V,−15V, I

REF

=

2 mA 108 136 108 136 mW

±

15V, I

REF

=

2 mA 135 174 135 174 mW

Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
the device beyond its specified operating conditions.

Note 3: The maximum junction temperature of the DAC0800 and DAC0802 is 125˚C. For operating at elevated temperatures, devices in the Dual-In-Line J package
must be derated based on a thermal resistance of 100˚C/W,junction-to-ambient, 175˚C/W for the molded Dual-In-Line N package and 100˚C/W for the Small Outline
M package.

Note 4: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 5: Pin-out numbers for the DAC080X represent the Dual-In-Line package. The Small Outline package pin-out differs from the Dual-In-Line package.

Connection Diagrams

Dual-In-Line Package

DS005686-13

Top View

Small Outline Package

DS005686-14

Top View

See Ordering Information

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Block Diagram (Note 5)

Typical Performance Characteristics

DS005686-2

Full Scale Current
vs Reference Current

DS005686-22

LSB Propagation Delay vs I

FS

DS005686-23

Reference Input
Frequency Response

DS005686-24

Curve 1: C

C

=

15 pF, V

IN

=

2 Vp-p centered at 1V.

Curve 2: C

C

=

15 pF, V

IN

=

50 mVp-p centered at

200 mV.
Curve 3: C

C

=

0pF,V

IN

=

100 mVp-p centered at

0V and applied through 50Ω connected to pin

14.2V applied to R14.

Reference Amp
Common-Mode Range

DS005686-25

Note. Positive common-mode range is always
(V+) − 1.5V.

Logic Input Current
vs Input Voltage

DS005686-26

VTH—VLCvs Temperature

DS005686-27

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Typical Performance Characteristics (Continued)

Equivalent Circuit

Output Current vs Output
Voltage (Output Voltage
Compliance)

DS005686-28

Output Voltage Compliance
vs Temperature

DS005686-29

Bit Transfer
Characteristics

DS005686-30

Note. B1–B8 have identical transfer
characteristics. Bits are fully switched with less
than1⁄2LSB error, at less than±100 mV from
actual threshold. These switching points are
guaranteed to lie between 0.8 and 2V over the
operating temperature range (V

LC

=

0V).

Power Supply Current
vs +V

DS005686-31

Power Supply Current
vs −V

DS005686-32

Power Supply Current
vs Temperature

DS005686-33

DS005686-15

FIGURE 2.

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Typical Applications

DS005686-5

IO+I

O

=

I

FS

for all logic states
For fixed reference, TTL operation, typical values are:
V

REF

=

10.000V

R

REF

=

5.000k

R15 ≈ R

REF

C

C

=

0.01 µF

V

LC

=

0V (Ground)

FIGURE 3. Basic Positive Reference Operation (Note 5)

DS005686-21

FIGURE 4. Recommended Full Scale Adjustment

Circuit (Note 5)

DS005686-16

Note. R

REF

sets IFS; R15 is for bias current cancellation

FIGURE 5. Basic Negative Reference Operation

(Note 5)

DS005686-17

B1 B2 B3 B4 B5 B6 B7 B8 IOmA IOmA E

O

E

O

Full Scale 111111111.992 0.000 −9.960 0.000
Full Scale−LSB 11111110 1.984 0.008 −9.920 −0.040
Half Scale+LSB 10000001 1.008 0.984 −5.040 −4.920
Half Scale 10000000 1.000 0.992 −5.000 −4.960
Half Scale−LSB 01111111 0.992 1.000 −4.960 −5.000
Zero Scale+LSB 00000001 0.008 1.984 −0.040 −9.920
Zero Scale 00000000 0.000 1.992 0.000 −9.960

FIGURE 6. Basic Unipolar Negative Operation (Note 5)

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Typical Applications (Continued)

DS005686-6

B1 B2 B3 B4 B5 B6 B7 B8 E

O

E

O

Pos. Full Scale 11111111−9.920 +10.000
Pos. Full Scale−LSB 11111110−9.840 +9.920

Zero Scale+LSB 10000001−0.080 +0.160
Zero Scale 10000000 0.000 +0.080

Zero Scale−LSB 01111111+0.080 0.000
Neg. Full Scale+LSB 00000001+9.920 −9.840
Neg. Full Scale 00000000+10.000 −9.920

FIGURE 7. Basic Bipolar Output Operation (Note 5)

DS005686-18

If R

L

=

R

L

within±0.05%, output is symmetrical about ground

B1 B2 B3 B4 B5 B6 B7 B8 E

O

Pos. Full Scale 11111111+9.960
Pos. Full Scale−LSB 11111110+9.880

(+)Zero Scale 10000000+0.040

(−)Zero Scale 01111111−0.040
Neg. Full Scale+LSB 00000001−9.880
Neg. Full Scale 00000000−9.960

FIGURE 8. Symmetrical Offset Binary Operation (Note 5)

DS005686-19

For complementary output (operation as negative logic DAC), connect inverting input of op amp to IO(pin 2), connect IO(pin 4) to ground.

FIGURE 9. Positive Low Impedance Output Operation (Note 5)

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Typical Applications (Continued)

DS005686-20

For complementary output (operation as a negative logic DAC) connect non-inverting input of op am to IO(pin 2); connect IO(pin 4) to ground.

FIGURE 10. Negative Low Impedance Output Operation (Note 5)

DS005686-10

Typical values: R

IN

=

5k,+V

IN

=

10V

FIGURE 11. Pulsed Reference Operation (Note 5)

DS005686-9

V

TH

=

V

LC

+ 1.4V
15V CMOS, HTL, HNIL
V

TH

=

7.6V

Note. Do not exceed negative logic input range of DAC.

FIGURE 12. Interfacing with Various Logic Families

DS005686-11

(a) I

REF

≥ peak negative swing of I

IN

DS005686-12

(b) +V

REF

must be above peak positive swing of V

IN

FIGURE 13. Accommodating Bipolar References (Note 5)

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Typical Applications (Continued)

DS005686-7

FIGURE 14. Settling Time Measurement (Note 5)

DS005686-8

Note. For 1 µs conversion time with 8-bit resolution and 7-bit accuracy, an LM361 comparator replaces the LM319 and the reference current is doubled by
reducing R1, R2 and R3 to 2.5 kΩ and R4 to 2 MΩ.

FIGURE 15. A Complete 2 µs Conversion Time, 8-Bit A/D Converter (Note 5)

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Physical Dimensions inches (millimeters) unless otherwise noted

Molded Small Outline Package (SO)

Order Numbers DAC0800LCM,

or DAC0802LCM

NS Package Number M16A

Molded Small Outline Package (SO)

Order Numbers DAC0800LCM,

or DAC0802LCM

NS Package Number M16A

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

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www.national.com

Molded Dual-In-Line Package

Order Numbers DAC0800, DAC0802

NS Package Number N16E

DAC0800/DAC0802 8-Bit Digital-to-Analog Converters

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.