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 cur-
rent range is possible. The DAC0800 series also features
high compliance complementary current outputs to allow
differential output voltages of 20 Vp-p with simple resistor
loads. 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 error accumulations.
The noise immune inputs will accept a variety of logic levels.
The performance and characteristics of the device are es-
sentially unchanged over the ±4.5V to ±18V power supply
range and power consumption at only 33 mW with ±5V
supplies is independent of logic input levels.
The DAC0800, DAC0802, DAC0800C and DAC0802C are a
direct replacement for the DAC-08, DAC-08A, DAC-08C,
and DAC-08H, respectively. For single supply operation,
refer to AN-1525.
Features
nFast settling output current: 100 ns
nFull scale error: ±1 LSB
nNonlinearity over temperature: ±0.1%
nFull scale current drift: ±10 ppm/˚C
nHigh output compliance: −10V to +18V
nComplementary current outputs
nInterface directly with TTL, CMOS, PMOS and others
n2 quadrant wide range multiplying capability
nWide power supply range: ±4.5V to ±18V
nLow power consumption: 33 mW at ±5V
nLow cost
Typical Application
Ordering Information
Non-
Linearity
Temperature
Range (T
A
)
Order Numbers
J Package (J16A) * N Package (N16E) * SO Package (M16A)
±0.1% FS 0˚C to +70˚C DAC0802LCJ DAC-08HQ DAC0802LCN DAC-08HP DAC0802LCM
±0.19% FS −55˚C to +125˚C DAC0800LJ DAC-08Q
±0.19% FS 0˚C to +70˚C DAC0800LCJ DAC-08EQ DAC0800LCN DAC-08EP DAC0800LCM
* Devices may be ordered by using either order number.
00568601
FIGURE 1. ±20 V
P-P
Output Digital-to-Analog Converter (Note 4)
September 2006
DAC0800/DAC0802 8-Bit Digital-to-Analog Converters
© 2006 National Semiconductor Corporation DS005686 www.national.com
Absolute Maximum Ratings (Note 1)
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 2) 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 3) 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 1)
Min Max Units
Temperature (T
A
)
DAC0800L −55 +125 ˚C
DAC0800LC 0 +70 ˚C
DAC0802LC 0 +70 ˚C
V
+
(V
−
)+
10
(V
−
)+
30 V
V− −15 −5 V
I
REF
(V
−
= −5V) 1 2 mA
I
REF
(V
−
= −15V) 1 4 mA
Electrical Characteristics
The following specifications apply for V
S
=±15V, I
REF
=2mAandT
MIN
≤T
A
≤T
MAX
unless otherwise specified. Output char-
acteristics refer to both I
OUT
and I
OUT
.
Symbol Parameter Conditions DAC0802LC DAC0800L/
DAC0800LC Units
Min Typ Max Min Typ Max
Resolution 888888Bits
Monotonicity 888888Bits
Nonlinearity ±0.1 ±0.19 %FS
t
s
Settling Time
To ±
1
⁄
2
LSB, All Bits
Switched “ON” or “OFF”,
T
A
=25˚C
100 135 ns
DAC0800L 100 135 ns
DAC0800LC 100 150 ns
t
PLH
, Propagation Delay T
A
=25˚C
t
PHL
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
<
1
⁄
2
LSB, R
OUT
>20 MΩ,
Typical
−10 18 −10 18 V
I
FS4
Full Scale Current
V
REF
= 10.000V,
R14 = R15 = 5.000 kΩ,
T
A
=25˚C
1.984 1.992 2.00 1.94 1.99 2.04 mA
I
FSS
Full Scale Symmetry I
FS4
−I
FS2
±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
V
−
= −8V to −18V
0
0
2.0
2.0
2.1
4.2
0
0
2.0
2.0
2.1
4.2 mA
DAC0800/DAC0802
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Electrical Characteristics (Continued)
The following specifications apply for V
S
=±15V, I
REF
=2mAandT
MIN
≤T
A
≤T
MAX
unless otherwise specified. Output char-
acteristics refer to both I
OUT
and I
OUT
.
Symbol Parameter Conditions DAC0802LC DAC0800L/
DAC0800LC Units
Min Typ Max Min Typ Max
Logic Input Levels V
LC
=0V
V
IL
Logic “0” 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 ≤V
IN
≤+0.8V −2.0 −10 −2.0 −10 µA
I
IH
Logic “1” 2V ≤V
IN
≤+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+
Positive Power Supply
Sensitivity 4.5V ≤V
+
≤18V 0.0001 0.01 0.0001 0.01 %/%
PSSI
FS−
Negative Power Supply
Sensitivity
−4.5V ≤V
−
≤18V, I
REF
=
1mA 0.0001 0.01 0.0001 0.01 %/%
I+ Power Supply Current V
S
=±5V, I
REF
=1mA 2.3 3.8 2.3 3.8 mA
I− −4.3 −5.8 −4.3 −5.8 mA
I+ Power Supply Current V
S
= +5V, −15V, I
REF
=2
mA
2.4 3.8 2.4 3.8 mA
I− −6.4 −7.8 −6.4 −7.8 mA
I+ Power Supply Current V
S
=±15V, I
REF
=2mA 2.5 3.8 2.5 3.8 mA
I− −6.5 −7.8 −6.5 −7.8 mA
P
D
Power Consumption
±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 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: 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 3: Human body model, 100 pF discharged through a 1.5 kΩresistor.
Note 4: Pin numbers represent the Dual-In-Line package. The Small Outline package pin numbers differ from from that of the Dual-In-Line package.
Connection Diagrams
Dual-In-Line Package Small Outline Package
00568613
Top View
00568614
Top View
See Ordering Information
DAC0800/DAC0802
www.national.com3
Block Diagram (Note 4)
00568602
Typical Performance Characteristics
Full Scale Current vs.
Reference Current LSB Propagation Delay vs. I
FS
00568622 00568623
Reference Input
Frequency Response
Reference Amp
Common-Mode Range
00568624
Curve 1: CC=15 pF, VIN=2 Vp-p centered at 1V.
Curve 2: CC=15 pF, VIN=50 mVp-p centered at 200 mV.
Curve 3: CC=0 pF, VIN=100 mVp-p centered at 0V and applied through 50Ω
connected to pin 14.2V applied to R14.
00568625
Note. Positive common-mode range is always (V+) − 1.5V.
DAC0800/DAC0802
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Typical Performance Characteristics (Continued)
Logic Input Current vs.
Input Voltage V
TH
—V
LC
vs. Temperature
00568626
00568627
Output Current vs. Output
Voltage (Output Voltage
Compliance)
Output Voltage Compliance vs.
Temperature
00568628 00568629
Bit Transfer
Characteristics
Power Supply Current
vs. +V
00568630
Note. B1–B8 have identical transfer characteristics. Bits are fully switched
with less than
1
⁄
2
LSB 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 (VLC = 0V).
00568631
DAC0800/DAC0802
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Typical Performance Characteristics (Continued)
Power Supply Current
vs. −V
Power Supply Current
vs. Temperature
00568632 00568633
Equivalent Circuit
00568615
FIGURE 2. Equivalent Circuit
DAC0800/DAC0802
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Typical Applications
00568605
IO+I
O=I
FS for all logic states
For fixed reference, TTL operation, typical values are:
VREF = 10.000V
RREF = 5.000k
R15 ≈RREF
CC= 0.01 µF
VLC = 0V (Ground)
FIGURE 3. Basic Positive Reference Operation (Note 4)
00568621
FIGURE 4. Recommended Full Scale Adjustment
Circuit (Note 4)
00568616
Note. RREF sets IFS; R15 is for bias current cancellation
FIGURE 5. Basic Negative Reference Operation
(Note 4)
DAC0800/DAC0802
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Typical Applications (Continued)
00568617
B1 B2 B3 B4 B5 B6 B7 B8 I
O
mA I
O
mA E
O
E
O
Full Scale 11111111 1.992 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 4)
00568606
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 4)
DAC0800/DAC0802
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Typical Applications (Continued)
00568618
If RL=R
Lwithin ±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 4)
00568619
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 4)
00568620
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. Low Impedance Negative Output Operation (Note 4)
DAC0800/DAC0802
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Typical Applications (Continued)
00568610
Typical values: RIN=5k,+VIN=10V
FIGURE 11. Pulsed Reference Operation (Note 4)
00568609
VTH =V
LC + 1.4V
15V CMOS, HTL, HNIL
VTH = 7.6V
Note. Do not exceed negative logic input range of DAC.
FIGURE 12. Interfacing with Various Logic Families
DAC0800/DAC0802
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Typical Applications (Continued)
00568608
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 kΩand R4 to 2 MΩ.
FIGURE 15. A Complete 2 µs Conversion Time, 8-Bit A/D Converter (Note 4)
DAC0800/DAC0802
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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
DAC0800/DAC0802
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Molded Dual-In-Line Package
Order Numbers DAC0800, DAC0802
NS Package Number N16E
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.
For the most current product information visit us at www.national.com.
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DAC0800/DAC0802 8-Bit Digital-to-Analog Converters
