DAC08.PDF

January 1995

DAC0808/DAC0807/DAC0806 8-Bit D/A Converters

General Description

The DAC0808 series is an 8-bit monolithic digital-to-analog

converter (DAC) featuring a full scale output current settling

time of 150 ns while dissipating only 33 mW with g 5V sup-

plies. No reference current (I REF ) trimming is required for

most applications since the full scale output current is typi-

cally g 1 LSB of 255 I REF / 256. Relative accuracies of bet-

ter than g 0.19% assure 8-bit monotonicity and linearity

while zero level output current of less than 4 m A provides

8-bit zero accuracy for I REF t 2 mA. The power supply cur-

rents of the DAC0808 series are independent of bit codes,

and exhibits essentially constant device characteristics over

the entire supply voltage range.

The DAC0808 will interface directly with popular TTL, DTL

or CMOS logic levels, and is a direct replacement for the

MC1508/MC1408. For higher speed applications, see

DAC0800 data sheet.

Features

Y Relative accuracy: g 0.19% error maximum (DAC0808)

Y Full scale current match: g 1 LSB typ

Y 7 and 6-bit accuracy available (DAC0807, DAC0806)

Y Fast settling time: 150 ns typ

Y Noninverting digital inputs are TTL and CMOS compati-

ble

Y High speed multiplying input slew rate: 8 mA/ m s

Y Power supply voltage range: g 4.5V to g 18V

Y Low power consumption: 33 mW @ g 5V

Block and Connection Diagrams

Dual-In-Line Package

Order Number

DAC0808, DAC0807,

or DAC0806

See NS Package

Number J16A,

M16A or N16A

TL/H/5687±2

TL/H/5687±1

Small-Outline Package

TL/H/5687±13

Top View

Ordering Information

ACCURACY OPERATING TEMPERATURE ORDER NUMBERS

RANGE J PACKAGE (J16A)* N PACKAGE (N16A)* SO PACKAGE (M16A)

DAC0808LCN MC1408P8 DAC0808LCM

7-bit 0 § C s T A sa 75 § C DAC0807LCJ MC1408L7 DAC0807LCN MC1408P7 DAC0807LCM

6-bit 0 § C s T A sa 75 § C DAC0806LCJ MC1408L6 DAC0806LCN MC1408P6 DAC0806LCM

*Note. Devices may be ordered by using either order number.

C 1995 National Semiconductor Corporation

TL/H/5687

RRD-B30M115/Printed in U. S. A.

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales

Office/Distributors for availability and specifications.

Power Supply Voltage

V CC a 18 V DC

V EE b 18 V DC

Digital Input Voltage, V5±V12 b 10 V DC to a 18 V DC

Applied Output Voltage, V O

Storage Temperature Range

b 65 § Cto a 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

b 11 V DC to a 18 V DC

Operating Ratings

Temperature Range

Reference Current, I 14

5mA

T MIN s T A s T MAX

Reference Amplifier Inputs, V14, V15

V CC ,V EE

DAC0808LC Series

0 s T A s a 75 § C

Power Dissipation (Note 3)

1000 mW

ESD Susceptibility (Note 4)

TBD

Electrical Characteristics

(V CC e 5V, V EE eb 15 V DC ,V REF /R14 e 2 mA, DAC0808: T A eb 55 § Cto a 125 § C, DAC0808C, DAC0807C, DAC0806C, T A

e 0 § Cto a 75 § C, and all digital inputs at high logic level unless otherwise noted.)

Symbol

Parameter

Conditions

Min Typ

Max

Units

E r

Relative Accuracy (Error Relative

(Figure4)

to Full Scale I O )

DAC0808LC (LM1408-8)

g 0.19 %

DAC0807LC (LM1408-7), (Note 5)

g 0.39 %

DAC0806LC (LM1408-6), (Note 5)

g 0.78 %

Settling Time to Within

(/2

LSB

T A e 25 § C (Note 6),

150

(Includes t PLH )

(Figure5)

t PLH ,t PHL Propagation Delay Time

T A e 25 § C, (Figure5)

100

TCI O

Output Full Scale Current Drift

g 20

ppm/ § C

MSB

Digital Input Logic Levels

(Figure3)

V IH

High Level, Logic ``1''

V DC

V IL

Low Level, Logic ``0''

0.8

V DC

MSB

Digital Input Current

(Figure3)

High Level

V IH e 5V

0.040

Low Level

V IL e 0.8V

b 0.003 b 0.8

I 15

Reference Input Bias Current

(Figure3)

b 1

b 3

m A

Output Current Range

(Figure3)

V EE eb 5V

2.0

2.1

V EE eb 15V, T A e 25 § C 0

2.0

4.2

I O

Output Current

V REF e 2.000V,

R14 e 1000 X ,

(Figure3)

1.9

1.99

2.1

Output Current, All Bits Low

(Figure3)

m A

Output Voltage Compliance (Note 2) E r s 0.19%, T A e 25 § C

V EE eb 5V, I REF e 1mA

b 0.55, a 0.4 V DC

b 5.0, a 0.4 V DC

V EE Below b 10V

Electrical Characteristics (Continued)

(V CC e 5V, V EE eb 15 V DC ,V REF /R14 e 2 mA, DAC0808: T A eb 55 § Cto a 125 § C, DAC0808C, DAC0807C, DAC0806C, T A

e 0 § Cto a 75 § C, and all digital inputs at high logic level unless otherwise noted.)

Symbol

Parameter

Conditions

Min

Typ Max

Units

SRI REF Reference Current Slew Rate

(Figure6)

mA/ m s

Output Current Power Supply b 5V s V EE s b 16.5V

0.05

2.7

m A/V

Sensitivity

Power Supply Current (All Bits

(Figure3)

Low)

I CC

2.3

I EE

b 4.3 b 13

Power Supply Voltage Range

T A e 25 § C, (Figure3)

V CC

4.5

5.0

5.5

V DC

V EE

b 4.5 b 15 b 16.5

V DC

Power Dissipation

All Bits Low V CC e 5V, V EE eb 5V 33 170 mW

V CC e 5V, V EE eb 15V 106 305 mW

All Bits High V CC e 15V, V EE eb 5V 90 mW

V CC e 15V, V EE eb 15V 160 mW

Note 1: 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 2: Range control is not required.

Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by T JMAX , i JA , and the ambient temperature, T A . The maximum

allowable power dissipation at any temperature is P D e (T JMAX b T A )/ i JA or the number given in the Absolute Maixmum Ratings, whichever is lower. For this

device, T JMAX e 125 § C, and the typical junction-to-ambient thermal resistance of the dual-in-line J package when the board mounted is 100 § C/W. For the dual-in-

line N package, this number increases to 175 § C/W and for the small outline M package this number is 100 § C/W.

Note 4: Human body model, 100 pF discharged through a 1.5 k X resistor.

Note 5: All current switches are tested to guarantee at least 50% of rated current.

Note 6: All bits switched.

Note 7: Pin-out numbers for the DAL080X represent the dual-in-line package. The small outline package pinout differs from the dual-in-line package.

Typical Application

V O e 10V

2 a

4 a ... A8

256

J TL/H/5687±3

FIGURE 1. a 10V Output Digital to Analog Converter (Note 7)

Typical Performance Characteristics

V CC e 5V, V EE eb 15V, T A e 25 § C, unless otherwise noted

Logic Input Current vs

Input Voltage

Bit Transfer Characteristics

Logic Threshold Voltage vs

Temperature

Output Current vs Output

Voltage (Output Voltage

Compliance)

Output Voltage Compliance

vs Temperature

Typical Power Supply

Current vs Temperature

Typical Power Supply

Current vs V EE

Typical Power Supply

Current vs V CC

Reference Input

Frequency Response

TL/H/5687±5

Unless otherwise specified: R14 e

R15 e 1k X ,C e 15 pF, pin 16 to

V EE ;R L e 50 X , pin 4 to ground.

Curve A: Large Signal Bandwidth

Method of Figure 7,V REF e 2 Vp-p

offset 1 V above ground.

Curve B: Small Signal Bandwidth

Method of Figure7,R L e 250 X ,V REF

e 50 mVp-p offset 200 mV above

ground.

Curve C: Large and Small Signal

Bandwidth Method of Figure9 (no op

amp, R L e 50 X ), R S e 50 X ,V REF e

2V, V S e 100 mVp-p centered at 0V.

TL/H/5687±4

FIGURE 2. Equivalent Circuit of the DAC0808 Series (Note 7)

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