Document Outline
- DESCRIPTION
- FEATURES
- PIN CONFIGURATIONS
- APPLICATIONS
- ORDERING INFORMATION
- BLOCK DIAGRAM
- ABSOLUTE MAXIMUM RATINGS
- ABSOLUTE MAXIMUM RATINGS
- DC ELECTRICAL CHARACTERISTICS
- AC ELECTRICAL CHARACTERISTICS
- TEST CIRCUITS
- TYPICAL PERFORMANCE CHARACTERISTICS
- TYPICAL APPLICATION
- FUNCTIONAL DESCRIPTION
- SETTLING TIME AND PROPAGATION DELAY
- BASIC DAC-08 CONFIGURATION
- RECOMMENDED FULL-SCALE AND ZERO-SCALE ADJUST
- UNIPOLAR VOLTAGE OUTPUT FOR LOW IMPEDANCE OUTPUT
- UNIPOLAR VOLTAGE OUTPUT FOR HIGH IMPEDANCE OUTPUT
- BASIC BIPOLAR OUTPUT OPERATION
- PACKAGE
- Data sheet status
- Definitions
- Disclaimers
Philips
Semiconductors
DAC-08 SERIES
8-bit high-speed multiplying D/A converter
Product data
Supersedes data of 1994 Aug 31
File under Integrated Circuits, Handbook IC11
2001 Aug 03
INTEGRATED CIRCUITS
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2
2001 Aug 03
853-0045 26832
DESCRIPTION
The DAC-08 series of 8-bit monolithic multiplying Digital-to-Analog
Converters provide very high-speed performance coupled with low
cost and outstanding applications flexibility.
Advanced circuit design achieves 70 ns settling times with very low
glitch and at low power consumption. Monotonic multiplying
performance is attained over a wide 20-to-1 reference current range.
Matching to within 1 LSB between reference and full-scale currents
eliminates the need for full-scale trimming in most applications.
Direct interface to all popular logic families with full noise immunity is
provided by the high swing, adjustable threshold logic inputs.
Dual complementary outputs are provided, increasing versatility and
enabling differential operation to effectively double the peak-to-peak
output swing. True high voltage compliance outputs allow direct
output voltage conversion and eliminate output op amps in many
applications.
All DAC-08 series models guarantee full 8-bit monotonicity and
linearities as tight as 0.1% over the entire operating temperature
range. Device performance is essentially unchanged over the
4.5 V
to
18 V power supply range, with 37 mW power consumption
attainable at
5 V supplies.
The compact size and low power consumption make the DAC-08
attractive for portable and military aerospace applications.
FEATURES
Fast settling output current--70 ns
Full-scale current prematched to
1 LSB
Direct interface to TTL, CMOS, ECL, HTL, PMOS
Relative accuracy to 0.1% maximum over temperature range
High output compliance 10 V to +18 V
True and complemented outputs
Wide range multiplying capability
Low FS current drift --
10ppm/
C
Wide power supply range--
4.5 V to
18 V
Low power consumption--37 mW at
5 V
APPLICATIONS
8-bit, 1
s A-to-D converters
Servo-motor and pen drivers
Waveform generators
Audio encoders and attenuators
Analog meter drivers
Programmable power supplies
CRT display drivers
High-speed modems
Other applications where low cost, high speed and complete
input/output versatility are required
Programmable gain and attenuation
Analog-Digital multiplication
PIN CONFIGURATIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
N Package
D
1
Package
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
NOTE:
1. SO and non-standard pinouts.
VLC
IO
V
IO
B1 (MSB)
B2
B3
B4
COMP
VREF
VREF+
V+
B8 (LSB)
B7
B6
B5
V+
VREF+
VREF
COMPEN
VLC
IO
V
IO
B8 (LSB)
B7
B6
B5
B4
B3
B2
B1 (MSB)
TOP VIEW
TOP VIEW
SL00001
Figure 1. Pin Configuration
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
3
ORDERING INFORMATION
DESCRIPTION
TEMPERATURE RANGE
ORDER CODE
DWG #
16-Pin Plastic Dual In-Line Package (DIP)
0 to +70
C
DAC-08CN
SOT38-4
16-Pin Plastic Dual In-Line Package (DIP)
0 to +70
C
DAC-08EN
SOT38-4
16-Pin Plastic Small Outline (SO) Package
0 to +70
C
DAC-08ED
SOT109-1
16-Pin Plastic Dual In-Line Package (DIP)
0 to +70
C
DAC-08HN
SOT38-4
BLOCK DIAGRAM
BIAS
NETWORK
CURRENT
SWITCHES
MSB
LSB
V+
13
1
5
6
7
8
9
10
11
12
14
15
16
3
4
2
COMP.
V
REFERENCE
AMPLIFIER
VREF(+)
VREF()
B1
VLC
B2
B3
B4
B5
B6
B7
B8
IOUT
+
IOUT
SL00002
Figure 2. Block Diagram
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
RATING
UNIT
V+ to V
Power supply voltage
36
V
V
5
V
12
Digital input voltage
V to V plus 36 V
V
LC
Logic threshold control
V to V+
V
0
Applied output voltage
V to +18
V
I
14
Reference current
5.0
mA
V
14
, V
15
Reference amplifier inputs
V
EE
to V
CC
P
D
Maximum power dissipation T
amb
= 25
C (still-air)
1
N package
1450
mW
D package
1090
mW
T
SOLD
Lead soldering temperature (10 sec max)
230
C
T
amb
Operating temperature range
0 to +70
C
T
stg
Storage temperature range
65 to +150
C
NOTE:
1. Derate above 25
C, at the following rates:
N package at 11.6mW/
C
D package at 8.7mW/
C
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
4
DC ELECTRICAL CHARACTERISTICS
Pin 3 must be at least 3 V more negative than the potential to which R
15
is returned. V
CC
=
15V , I
REF
= 2.0 mA.
Output characteristics refer to both I
OUT
and I
OUT
unless otherwise noted. T
amb
= 0
C to 70
C.
SYMBOL
PARAMETER
TEST CONDITIONS
DAC-08C
DAC-08E
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
Min
Typ
Max
Min
Typ
Max
UNIT
Resolution
8
8
8
8
8
8
Bits
Monotonicity
8
8
8
8
8
8
Bits
Relative accuracy
Over temperature range
0.39
0.19
%FS
Differential non-linearity
0.78
0.39
%FS
TCI
FS
Full-scale tempco
10
10
ppm/
C
V
OC
Output voltage compliance
Full-scale current change< 1/2LSB
10
+18
10
+18
V
I
FS4
Full-scale current
V
REF
= 10.000V;
R
14
, R
15
=5.000 k
1.94
1.99
2.04
1.94
1.99
2.04
mA
I
FSS
Full-scale symmetry
I
FS4
-I
FS2
2.0
16
1.0
8.0
A
I
ZS
Zero-scale current
0.2
4.0
0.2
2.0
A
I
FSR
Full-scale output current
range
R
14
, R
15
=5.000 k
range
V
REF
= +15.0 V, V = 10 V
2.1
2.1
mA
V
REF
= +25.0 V, V = 12 V
4.2
4.2
mA
Logic input levels
V
LC
= 0 V
V
IL
Low
0.8
0.8
V
V
IH
High
2.0
2.0
V
Logic input current
V
LC
= 0 V
I
IL
Low
V
IN
= 10 V to +0.8 V
2.0
10
2.0
10
A
I
IH
High
V
IN
= 2.0 V to 18 V
0.002
10
0.002
10
A
V
IS
Logic input swing
V = 15 V
10
+18
10
+18
V
V
THR
Logic threshold range
V
S
=
15 V
10
+13.5
10
+13.5
V
I
15
Reference bias current
1.0
3.0
1.0
3.0
A
dl/dt
Reference input slew rate
4.0
8.0
4.0
8.0
mA/
s
Power supply sensitivity
I
REF
= 1 mA
PSSI
FS+
Positive
V+ = 4.5 to 5.5 V, V = 15 V;
V+ = 13.5 to 16.5 V, V = 15 V
0.0003
0.01
0.0003
0.01
%FS/%VS
PSI
FS
Negative
V = 4.5 to 5.5 V, V+ = +15 V;
V = 13.5 to 16.5 V, V+ = +15 V
0.002
0.01
0.002
0.01
%FS/%VS
Power supply current
I+
Positive
V
S
=
5 V I
REF
= 1 0 mA
3.1
3.8
3.1
3.8
mA
I
Negative
V
S
=
5 V, I
REF
= 1.0 mA
4.3
5.8
4.3
5.8
mA
I+
Positive
V
S
= +5 V 15 V I
REF
= 2 0 mA
3.1
3.8
3.1
3.8
mA
I
Negative
V
S
= +5 V, 15 V, I
REF
= 2.0 mA
7.1
7.8
7.1
7.8
mA
I+
Positive
V
S
=
15 V I
REF
= 2 0 mA
3.2
3.8
3.2
3.8
mA
I
Negative
V
S
=
15 V, I
REF
= 2.0 mA
7.2
7.8
7.2
7.8
mA
5 V, I
REF
= 1.0 mA
37
48
37
48
mW
P
D
Power dissipation
+5 V, 15 V, I
REF
= 2.0 mA
122
136
122
136
mW
15 V, I
REF
= 2.0 mA
156
174
156
174
mW
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
5
DC ELECTRICAL CHARACTERISTICS
(Continued)
Pin 3 must be at least 3 V more negative than the potential to which R
15
is returned. V
CC
= +15 V, I
REF
= 2.0 mA.
Output characteristics refer to both I
OUT
and I
OUT
, unless otherwise noted. T
amb
= 0
C to 70
C.
SYMBOL
PARAMETER
TEST CONDITIONS
DAC-08H
UNIT
Min
Typ
Max
Resolution
8
8
8
Bits
Monotonicity
8
8
8
Bits
Relative accuracy
Over temperature range
0.1
%FS
Differential non-linearity
0.19
%FS
TCI
FS
Full-scale tempco
10
50
ppm/
C
V
OC
Output voltage compliance
Full-scale current change 1/2LSB
10
+18
V
I
FS4
Full-scale current
V
REF
= 10.000 V, R
14
, R
15
= 5.000 k
1.984
1.992
2.000
mA
I
FSS
Full-scale symmetry
I
FS4
I
FS2
1.0
4.0
A
I
ZS
Zero-scale current
0.2
1.0
A
I
FSR
Full-scale output current range
R
14
, R
15
= 5.000 k
V
REF
= +15.0 V, V = 10 V
2.1
mA
V
REF
=+25.0V, V=12V
4.2
mA
Logic input levels
V
LC
= 0 V
V
IL
Low
0.8
V
V
IH
High
2.0
V
Logic input current
V
LC
= 0 V
I
IL
Low
V
IN
= 10 V to +0.8 V
2.0
10
A
I
IH
High
V
IN
= 2.0 V to 18 V
0.002
10
A
V
IS
Logic input swing
V = 15 V
10
+18
V
V
THR
Logic threshold range
V
S
=
15 V
10
+13.5
V
I
15
Reference bias current
1.0
3.0
A
dl/dt
Reference input slew rate
4.0
8.0
mA/
s
Power supply sensitivity
I
REF
= 1 mA
PSSI
FS+
Positive
V+ = 4.5 to 5.5 V, V = 15 V;
V+ = 13.5 to 16.5 V, V = 15 V
0.0003
0.01
%FS/%VS
PSI
FS
Negative
V = 4.5 to 5.5 V, V+ = +15 V;
V = 13.5 to 16.5 V, V+ = +15 V
0.002
0.01
%FS/%VS
Power supply current
I+
Positive
V
S
=
5 V I
REF
= 1 0 mA
3.1
3.8
mA
I
Negative
V
S
=
5 V, I
REF
= 1.0 mA
4.3
5.8
mA
I+
Positive
V
S
= +5 V 15 V I
REF
= 2 0 mA
3.1
3.8
mA
I
Negative
V
S
= +5 V, 15 V, I
REF
= 2.0 mA
7.1
7.8
mA
I+
Positive
V
S
=
15 V I
REF
= 2 0 mA
3.2
3.8
mA
I
Negative
V
S
=
15 V, I
REF
= 2.0 mA
7.2
7.8
mA
P
D
Power dissipation
5 V, I
REF
= 1.0 mA
37
48
mW
+5 V, 15 V, I
REF
= 2.0 mA
122
136
mW
15 V, I
REF
= 2.0 mA
156
174
mW
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
6
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
TEST CONDITIONS
DAC-08C
DAC-08E
DAC-08H
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
UNIT
t
S
Settling time
To
1/2LSB, all bits
switched on or off,
T
amb
= 25
C
70
135
70
135
70
135
ns
Propagation delay
t
PLH
Low-to-High
T
amb
= 25
C, each bit.
ns
t
PHL
High-to-Low
All bits switched
35
60
35
60
35
60
TEST CIRCUITS
CONTROL
LOGIC
DAC-08
REFERENCE DAC
ACCURACY > 0.006%
NE5534
ERROR
OUTPUT
V
V+
+
16
14
15
5-12
1
2
4
13
3
VREF
RREF
Rf
R15
SL00003
Figure 3. Relative Accuracy Test Circuit
FOR SETTLING TIME
MEASUREMENT
(ALL BITS
SWITCHED LOW
TO HIGH)
USE RL to GND
FOR TURN OFF
MEASUREMENT
SETTLING TIME
TRANSIENT
RESPONSE
eIN
2.4 V
0.4 V
1.0 V
0
0
-100 mV
1.4 V
RL = 500
RL = 50
PIN 4 TO GND
tS = 70 ns TYPICAL
TO
1/2 LSB
tPHL = tPLH = 10 ns
tPHL
tPLH
CO
25 pF
15 pF
5
6
7
8
9
10
11
12
3
13
14
15
1
2
4
16
DAC-08
V
EE
V
CC
eIN
eO
0.1
F
0.1
F
0.1
F
RL
+2.0 V
DC
SL00004
1.0 k
1.0 k
51
Figure 4. Transient Response and Settling Time
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
7
TEST CIRCUITS
(Continued)
5
6
7
8
9
10
11
12
3
13
14
15
1
2
4
16
DAC-08
V
EE
V
CC
0.1
F
OPEN
SCOPE
R
EQ
= 200
R
L
R
P
R
IN
VIN
dI
dt
+
I
R
L
dV
dt
SLEWING TIME
10%
90%
0
2.0 mA
2V
0
SL00005
1 k
Figure 5. Reference Current Slew Rate Measurement
NOTES:
(See text for values of C.)
Typical values of R
14
= R
15
= 1 k
V
REF
= +2.0 V
C = 15 pF
V
I
and I
I
apply to inputs A
1
through A
8
The resistor tied to Pin 15 is to temperature compensate the bias current and may not be necessary for all applications.
I
O
+
K
A
1
2
)
A
2
4
)
A
3
8
)
A
4
16
)
A
5
32
)
A
6
64
)
A
7
128
)
A
8
256
where K
[
V
REF
R
14
and A
N
= `1' if A
N
is at High Level
A
N
= `0' if A
N
is at Low Level
5
6
7
8
9
10
11
12
3
13
14
15
1
2
4
16
DAC-08
V
CC
DIGITAL
INPUTS
OUTPUT
I
CC
V
O
V
REF
(+)
I
O
R
L
C
V
EE
I
EE
V
I
I
I
(+)
R
15
R
14
I
15
I
14
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
SL00006
Figure 6. Notation Definitions
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
8
TYPICAL PERFORMANCE CHARACTERISTICS
10
IFS -- OUTPUT FULL SCALE CURRENT (mA)
50ns/DIVISIOM
REQ = 200
, RL = 100
, CC = 0
2.0mA
NOTES:
Curve 1:
CC = 15pF, VIN = 2.0VP-P centered at +1.0V
Curve 1:
CC = 15pF, VIN = 5m0VP-P centered at +200mV
Curve 1:
CC = 15pF, VIN = 100m0VP-P centered at 0V
and applied through 50
connected to Pin 14.
+2.0V applied to R14.
Output Current vs Output Voltage
(Output Voltage Compliance)
Fast Pulsed Reference Operation
True and Complementary Output
Operation
Full-Scale Settling Time
LSB Switching
Full-Scale Current vs
Reference Current
LSB Propagation Delay vs IFS
Reference Input Frequency Response
IREF -- REFERENCE CURRENT (mA)
5.0
4.0
3.0
2.0
1.0
0
0
1.0
2.0
3.0
4.0
5.0
I OUTPUT CURRENT (mA) FS
TA = Tmin TO Tmax
ALL BITS "HIGH"
LIMIT FOR
V=15V
LIMIT FOR
V=5V
(00000000)
(11111111)
0mA
1.0mA
IOUT
IOUT
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
ALL BITS ON
14 10
6
2 0 2
6
10
14
18
2.5V
0.5V
0.5mA
2.5mA
VIN
IOUT
200ns/division
BIT 8
LOGIC
INPUT
IOUT
8
A
2.4V
0.4V
0V
0
ALL BITS SWITCHED ON
OUTPUT 1/2LSB
SETTLING +1/2LSB
0
2.4V
0.4V
50ns/DIVISIOM
IFS=2mA, RL=1k
1/2LSB=4
A
500
400
300
200
100
0
.05
.01
.02
.05
0.1
0.2
0.5
1.0
2.0
5.0
10
PROP
AGA
TION DELA
Y
(ns)
1LSB=78nA
1LSB=7.8
A
RELA
TIVE OUTPUT (dB)
FREQUENCY (MHz)
6
4
2
0
2
4
6
8
10
12
14
0.1
0.2
0.5
1.0
2.0
5.0
R14=R15=1k
3
2
1
RL
500
ALL BITS "ON"
VR15 = 0V
IREF = 0.2mA
IREF = 1mA
IREF = 2mA
V = 15V
V = 5V
TA = Tmin TO Tmax
SL00007
Figure 7. Typical Performance Characteristics
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
9
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
OUTPUT CURRENT
(mA)
LOGIC INPUT VOLTAGE (V)
LOGIC
INPUT
CURRENT
(
A)
10,000
POWER SUPPL
Y
CURRENT
(mA)
POWER SUPPL
Y
CURRENT
(mA)
NOTES:
B1 through B8 have identical transfer characteristics.
Bits are fully switched, with less than 1/2LSB error, at
less than
100mV from actual threshold. These
switching points are guaranteed to lie between 0.8 and
2.0V over the operating temperature range
(VLC = 0.0V).
Reference AMP Common-Mode Range
All Bits On
Logic Input Current vs Input Voltage
V
TH
V
LC
vs Temperature
Output Voltage Compliance
vs Temperature
Bit Transfer Characteristics
Power Supply Current vs V+
Power Supply Current vs V
Power Supply Current vs Temperature
Maximum Reference Input Frequency
vs Compensation Capacitor Value
2.0
1.8
1.6
1.4
1.2
1.o
0.8
0.6
0.4
0.2
0
50
0
50
100
150
V V (V) TH
LC
TEMPERATURE (
C)
8
7
6
5
4
3
2
1
0
0
4.0
8.0
12
16
20
V -- NEGATIVE POWER SUPPLY (VDC)
I+
BITS MAY BE HIGH OR LOW
I WITH IREF = 2mA
I WITH IREF = 1mA
I WITH IREF = 0.2mA
8
7
6
5
4
3
2
1
0
50
0
50
100
150
TEMPERATURE (
C)
BITS MAY BE HIGH OR LOW
IREF = 2.0mA
I+
I
V+ = +15V
V = +15V
1,000
100
10
1
10
100
1000
CC (pF)
F (kHz) MAX
8.0
6.0
4.0
2.0
0
12
8
4
0
4
8
12
16
LOGIC INPUT VOLTAGE (V)
1.4
20
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
14 10
6
2 0 2
6
10
14
18
V15 -- REFERENCE COMMON MODE VOLTAGE (V)
POSITIVE COMMON-MODE RANGE IS ALWAYS (V+) 1.5V.
IREF = 2mA
TA = TMIN to TMAX
IREF = 1mA
IREF = 0.2mA
V = 15V
V = 5V
V+ = +5V
POWER SUPPL
Y
CURRENT
(mA)
8
7
6
5
4
3
2
1
0
50
0
50
100
150
V+ POSITIVE POWER SUPPLY (V
DC
)
ALL BITS HIGH OR LOW
I+
I
1.2
1.0
0.8
0.6
0.4
0.2
0
12
8
4
0
4
8
12
16
OUTPUT CURRENT
(mA)
IREF = 2.0mA
B1
B2
B3
B4
B5
V = 15V
V = 5V
Shaded area indicates
permissible output voltage
range for V = -15V, IREF
2.0mA
For other V or IREF
See "Output Current vs Output
Voltage" curve on previous page
TEMPERATURE (
C)
16
12
8
4
0
4
8
12
50
0
50
100
150
OUTPUT VOL
T
AGE (V)
SL00008
Figure 8. Typical Performance Characteristics (cont.)
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
10
TYPICAL APPLICATION
NOTES:
REQ = RIN || RP
Typical Values
RIN = 5k
+VIN = 10V
Pulsed Referenced Operation
OPTIONAL RESISTOR
FOR OFFSET
INPUTS
NO CAP
14
15 16
2
4
+VREF
RREF
REQ
=200
RP
RIN
0V
SL00009
Figure 9. Typical Application
FUNCTIONAL DESCRIPTION
Reference Amplifier Drive and Compensation
The reference amplifier input current must always flow into Pin 14
regardless of the setup method or reference supply voltage polarity.
Connections for a positive reference voltage are shown in Figure 3.
The reference voltage source supplies the full reference current. For
bipolar reference signals, as in the multiplying mode, R
15
can be
tied to a negative voltage corresponding to the minimum input level.
R
15
may be eliminated with only a small sacrifice in accuracy and
temperature drift.
The compensation capacitor value must be increased as R
14
value
is increased. This is in order to maintain proper phase margin. For
R
14
values of 1.0, 2.5, and 5.0 k
, minimum capacitor values are
15, 37, and 75 pF, respectively. The capacitor may be tied to either
V
EE
or ground, but using V
EE
increases negative supply rejection.
(Fluctuations in the negative supply have more effect on accuracy
than do any changes in the positive supply.)
A negative reference voltage may be used if R
14
is grounded and
the reference voltage is applied to R
15
as shown. A high input
impedance is the main advantage of this method. The negative
reference voltage must be at least 3.0 V above the V
EE
supply.
Bipolar input signals may be handled by connecting R
14
to a positive
reference voltage equal to the peak positive input level at Pin 15.
When using a DC reference voltage, capacitive bypass to ground is
recommended. The 5.0 V logic supply is not recommended as a
reference voltage, but if a well regulated 5.0V supply which drives
logic is to be used as the reference, R
14
should be formed of two
series resistors with the junction of the two resistors bypassed with
0.1
F to ground. For reference voltages greater than 5.0 V, a clamp
diode is recommended between Pin 14 and ground.
If Pin 14 is driven by a high impedance such as a transistor current
source, none of the above compensation methods applies and the
amplifier must be heavily compensated, decreasing the overall
bandwidth.
Output Voltage Range
The voltage at Pin 4 must always be at least 4.5 V more positive
than the voltage of the negative supply (Pin 3) when the reference
current is 2 mA or less, and at least 8 V more positive than the
negative supply when the reference current is between 2 mA and
4 mA. This is necessary to avoid saturation of the output transistors,
which would cause serious accuracy degradation.
Output Current Range
Any time the full-scale current exceeds 2 mA, the negative supply
must be at least 8 V more negative than the output voltage. This is
due to the increased internal voltage drops between the negative
supply and the outputs with higher reference currents.
Accuracy
Absolute accuracy is the measure of each output current level with
respect to its intended value, and is dependent upon relative
accuracy, full-scale accuracy and full-scale current drift. Relative
accuracy is the measure of each output current level as a fraction of
the full-scale current after zero-scale current has been nulled out.
The relative accuracy of the DAC-08 series is essentially constant
over the operating temperature range due to the excellent
temperature tracking of the monolithic resistor ladder. The reference
current may drift with temperature, causing a change in the absolute
accuracy of output current. However, the DAC-08 series has a very
low full-scale current drift over the operating temperature range.
The DAC-08 series is guaranteed accurate to within
LSB at
+25
C at a full-scale output current of 1.992 mA. The relative
accuracy test circuit is shown in Figure 3. The 12-bit converter is
calibrated to a full-scale output current of 1.99219 mA, then the
DAC-08 full-scale current is trimmed to the same value with R
14
so
that a zero value appears at the error amplifier output. The counter
is activated and the error band may be displayed on the
oscilloscope, detected by comparators, or stored in a peak detector.
Two 8-bit D-to-A converters may not be used to construct a 16-bit
accurate D-to-A converter. 16-bit accuracy implies a total of
part in
65,536, or
0.00076%, which is much more accurate than the
0.19% specification of the DAC-08 series.
Monotonicity
A monotonic converter is one which always provides analog output
greater than or equal to the preceding value for a corresponding
increment in the digital input code. The DAC-08 series is monotonic
for all values of reference current above 0.5 mA. The recommended
range for operation is a DC reference current between 0.5 mA and
4.0 mA.
Settling Time
The worst-case switching condition occurs when all bits are
switched on, which corresponds to a low-to-high transition for all
input bits. This time is typically 70 ns for settling to within LSB for
8-bit accuracy. This time applies when R
L
<500
and C
O
<25 pF.
The slowest single switch is the least significant bit, which typically
turns on and settles in 65 ns. In applications where the DAC
functions in a positive-going ramp mode, the worst-case condition
does not occur and settling times less than 70 ns may be realized.
Extra care must be taken in board layout since this usually is the
dominant factor in satisfactory test results when measuring settling
time. Short leads, 100
F supply bypassing for low frequencies,
minimum scope lead length, and avoidance of ground loops are all
mandatory.
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
11
SETTLING TIME AND PROPAGATION DELAY
NOTES:
D1, D2 = IN6263 or equivalent
D3 = IN914 or equivalent
C1 = 0.01
F
C2, C3 = 0.1
F
Q1 = 2N3904
C4, C5 = 15pF and includes all probe and fixturing capacitance.
V
IN
V
S
+ = +15V
V
ADJ
V
OUT
V
S
= 15V
R
15
= 5k
I
REF
= 2mA
V
REF
= 10V
R
14
= 5k
V
OUT
R
1
= 1000
R
2
= 1000
R
3
= 500
50
C
1
C
2
C
5
C
3
D
3
D
1
D
2
C
4
DUT
14
15
16
3
1
2
4
12
11
10
9
8
7
6
5
Q
1
SL00010
Figure 10. Settling Time and Propagation Delay
BASIC DAC-08 CONFIGURATION
NOTES:
I
FS
[
)
V
REF
R
REF
x
255
256
; I
O
)
I
O
+
I
FS
for all logic states
MSB 2
3 4 5 6 7
LSB
5
6 7 8 9 10 11 12
14
15
3
16
13
1
2
4
DAC-08
(LOW T.C.)
V+
V
I
O
I
O
+V
REF
I
REF
R
REF
C
COMP
0.1
F
0.1
F
SL00011
Figure 11. Basic DAC-08 Configuration
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
12
RECOMMENDED FULL-SCALE AND ZERO-SCALE ADJUST
NOTES:
R1 = low T.C.
R3 = R1 + R2
R2
0.1 R1 to minimize pot. contribution to full-scale drift
14
15
2
4
DAC-08
V
REF
V+
V
R
4
= 1M
R
S
= 20k
R
3
R
2
R
1
SL00012
Figure 12. Recommended Full-Scale and Zero-Scale Adjust
UNIPOLAR VOLTAGE OUTPUT FOR LOW IMPEDANCE OUTPUT
V
OUT
=
14
15
DAC-08
+
NE531
OR
EQUIV
0 TO +10V
I
R
= 2mA
4
2
5k
5k
(LOW T.C.)
SL00013
Figure 13. Unipolar Voltage Output for Low Impedance Output
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
13
UNIPOLAR VOLTAGE OUTPUT FOR HIGH IMPEDANCE OUTPUT
14
2
4
DAC-08
I
R
= 2mA
V
OUT
V
OUT
5k
5k
V = 10V
14
2
4
DAC-08
I
R
= 2mA
V
OUT
V
OUT
a. Positive Output
a. Negative Output
SL00014
Figure 14. Unipolar Voltage Output for High Impedance Output
BASIC BIPOLAR OUTPUT OPERATION (OFFSET BINARY)
1
1
1
1
0
0
0
1
1
0
0
1
0
0
1
1
0
0
1
0
0
1
1
0
0
1
0
0
1
1
0
0
1
0
0
1
1
0
0
1
0
0
1
1
0
0
1
0
0
1
0
1
0
1
1
0
Positive full-scale
Positive FS 1LSB
+ Zero-scale + 1LSB
Zero-scale
Zero-scale 1LSB
Negative full scale 1LSB
Negative full scale
9.920V
9.840V
0.080V
0.000
0.080
+9.920
+10.000
+10.000
+9.920
+0.160
+0.080
0.000
9.840
9.920
B1
B2
B3
B4
B5
B6
B7
B8
VOUT
VOUT
14
2
4
DAC-08
I
R
= 2mA
V
OUT
V
OUT
10k
V = 10V
10k
SL00015
Figure 15. Basic Bipolar Output Operation (Offset Binary)
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
14
DIP16:
plastic dual in-line package; 16 leads (300 mil)
SOT38-4
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
15
SO16:
plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
Philips Semiconductors
Product data
DAC-08 Series
8-bit high-speed multiplying D/A converter
2001 Aug 03
16
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Contact information
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.
Koninklijke Philips Electronics N.V. 2001
All rights reserved. Printed in U.S.A.
Date of release: 10-01
Document order number:
9397 750 08922
Philips
Semiconductors
Data sheet status
[1]
Objective data
Preliminary data
Product data
Product
status
[2]
Development
Qualification
Production
Definitions
This data sheet contains data from the objective specification for product development.
Philips Semiconductors reserves the right to change the specification in any manner without notice.
This data sheet contains data from the preliminary specification. Supplementary data will be
published at a later date. Philips Semiconductors reserves the right to change the specification
without notice, in order to improve the design and supply the best possible product.
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply.
Changes will be communicated according to the Customer Product/Process Change Notification
(CPCN) procedure SNW-SQ-650A.
Data sheet status
[1] Please consult the most recently issued data sheet before initiating or completing a design.
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL
http://www.semiconductors.philips.com.
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