DAC-08 [NXP]
8-bit high-speed multiplying D/A converter; 8位高速乘法D / A转换器
| 型号： | DAC-08 |
| 厂家： | 
NXP |
| 描述： | 8-bit high-speed multiplying D/A converter |
| 文件： | 总16页 (文件大小：163K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DAC-08 SERIES
8-bit high-speed multiplying D/A converter
Product data
2001 Aug 03
Supersedes data of 1994 Aug 31
File under Integrated Circuits, Handbook IC11
Philips
Semiconductors
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
DESCRIPTION
PIN CONFIGURATIONS
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.
N Package
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
COMP
V
LC
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.
I
V
O
REF–
V–
V
REF+
V+
I
O
B
(MSB)
B
B
8
(LSB)
1
B
7
2
B
B
B
6
3
4
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.
B
5
TOP VIEW
1
D Package
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.
1
2
3
4
5
6
7
8
V+
16
B
B
(LSB)
8
15
14
13
12
11
10
9
V
V
7
6
5
4
REF+
B
B
REF–
The compact size and low power consumption make the DAC-08
attractive for portable and military aerospace applications.
COMPEN
V
B
LC
B
B
I
3
2
1
O
FEATURES
• Fast settling output current—70 ns
V–
I
B
(MSB)
O
• 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
TOP VIEW
NOTE:
1. SO and non-standard pinouts.
SL00001
Figure 1. Pin Configuration
• 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 µs 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
2
2001 Aug 03
853-0045 26832
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
ORDERING INFORMATION
DESCRIPTION
TEMPERATURE RANGE
0 to +70°C
ORDER CODE
DWG #
SOT38-4
SOT38-4
SOT109-1
SOT38-4
16-Pin Plastic Dual In-Line Package (DIP)
16-Pin Plastic Dual In-Line Package (DIP)
16-Pin Plastic Small Outline (SO) Package
16-Pin Plastic Dual In-Line Package (DIP)
DAC-08CN
DAC-08EN
DAC-08ED
DAC-08HN
0 to +70°C
0 to +70°C
0 to +70°C
BLOCK DIAGRAM
MSB
LSB
V+
V
1
B
B
B
B
B
B
B
B
8
LC
1
2
3
4
5
6
7
13
5
6
7
8
9
10
11
12
4
I
BIAS
OUT
NETWORK
CURRENT
SWITCHES
I
14
15
OUT
2
V
V
(+)
(–)
REF
+
–
REF
REFERENCE
AMPLIFIER
3
16
COMP.
V–
SL00002
Figure 2. Block Diagram
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
RATING
UNIT
V+ to V–
V –V
Power supply voltage
Digital input voltage
36
V
V– to V– plus 36 V
V– to V+
5
12
V
LC
V
0
Logic threshold control
Applied output voltage
Reference current
V– to +18
5.0
V
I
14
mA
V
P
, V
15
Reference amplifier inputs
V to V
EE CC
14
1
Maximum power dissipation T
= 25 °C (still-air)
D
amb
N package
D package
1450
1090
mW
mW
T
Lead soldering temperature (10 sec max)
Operating temperature range
230
°C
°C
°C
SOLD
T
amb
0 to +70
–65 to +150
T
stg
Storage temperature range
NOTE:
1. Derate above 25 °C, at the following rates:
N package at 11.6mW/°C
D package at 8.7mW/°C
3
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
DC ELECTRICAL CHARACTERISTICS
Pin 3 must be at least 3 V more negative than the potential to which R is returned. V = ±15V , I
= 2.0 mA.
15
CC
REF
Output characteristics refer to both I
and I
unless otherwise noted. T = 0 °C to 70 °C.
amb
OUT
OUT
DAC-08C
DAC-08E
UNIT
SYMBOL
PARAMETER
Resolution
TEST CONDITIONS
Min
8
Typ
8
Max
8
Min
8
Typ
Max
8
8
Bits
Bits
Monotonicity
8
8
8
8
8
8
Relative accuracy
Over temperature range
±0.39
±0.78
±0.19
±0.39
%FS
%FS
ppm/°C
V
Differential non-linearity
Full-scale tempco
TCI
±10
±10
FS
V
OC
Output voltage compliance
Full-scale current change< 1/2LSB –10
+18
–10
+18
V
= 10.000V;
REF
I
Full-scale current
1.94
1.99
2.04
1.94
1.99
2.04
mA
FS4
R
, R =5.000 kΩ
14
15
I
I
I
Full-scale symmetry
Zero-scale current
I
-I
±2.0
±16
±1.0
±8.0
µA
µA
FSS
FS4 FS2
0.2
4.0
0.2
2.0
ZS
Full-scale output current
range
R
, R =5.000 kΩ
FSR
14
15
V
V
= +15.0 V, V– = –10 V
= +25.0 V, V– = –12 V
2.1
4.2
2.1
4.2
mA
mA
REF
REF
Logic input levels
V
LC
= 0 V
V
V
Low
0.8
0.8
V
V
IL
High
2.0
2.0
IH
Logic input current
V
LC
= 0 V
I
I
Low
V
= –10 V to +0.8 V
–2.0
–10
10
–2.0
–10
10
µA
µA
IL
IN
High
V
= 2.0 V to 18 V
V– = –15 V
0.002
0.002
IH
IN
V
V
Logic input swing
–10
–10
+18
–10
+18
+13.5
–3.0
V
V
IS
Logic threshold range
Reference bias current
Reference input slew rate
Power supply sensitivity
Positive
V
S
= ±15 V
+13.5 –10
–3.0
THR
I
15
–1.0
8.0
–1.0
8.0
µA
dl/dt
4.0
4.0
mA/µs
I
= 1 mA
REF
PSSI
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
FS+
PSI
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
FS–
Power supply current
Positive
I+
I–
3.1
3.8
3.1
3.8
mA
mA
V
S
= ±5 V, I
= 1.0 mA
REF
Negative
–4.3
–5.8
–4.3
–5.8
I+
I–
Positive
3.1
3.8
3.1
3.8
mA
mA
V
S
= +5 V, –15 V, I
= 2.0 mA
REF
Negative
–7.1
–7.8
–7.1
–7.8
I+
I–
Positive
3.2
3.8
3.2
3.8
mA
mA
V
S
= ±15 V, I
= 2.0 mA
REF
Negative
–7.2
–7.8
–7.2
–7.8
±5 V, I
= 1.0 mA
37
48
37
48
mW
mW
mW
REF
P
D
Power dissipation
+5 V, –15 V, I
= 2.0 mA
122
156
136
174
122
156
136
174
REF
±15 V, I
= 2.0 mA
REF
4
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
DC ELECTRICAL CHARACTERISTICS (Continued)
Pin 3 must be at least 3 V more negative than the potential to which R is returned. V = +15 V, I
= 2.0 mA.
15
CC
REF
Output characteristics refer to both I
and I , unless otherwise noted. T = 0 °C to 70 °C.
OUT amb
OUT
SYMBOL
PARAMETER
TEST CONDITIONS
DAC-08H
UNIT
Min
Typ
Max
Resolution
8
8
8
8
8
8
Bits
Bits
Monotonicity
Relative accuracy
Over temperature range
±0.1
%FS
%FS
Differential non-linearity
±0.19
TCI
Full-scale tempco
±10
±50
+18
ppm/°C
V
FS
V
OC
Output voltage compliance
Full-scale current
Full-scale current change 1/2LSB
–10
I
I
I
I
V
= 10.000 V, R , R = 5.000 kΩ
1.984
1.992
±1.0
0.2
2.000
±4.0
1.0
mA
µA
FS4
FSS
ZS
REF
14
15
Full-scale symmetry
Zero-scale current
I
–I
FS4 FS2
µA
Full-scale output current range
R
, R = 5.000 kΩ
14 15
FSR
V
= +15.0 V, V– = –10 V
2.1
4.2
mA
mA
REF
V
=+25.0V, V–=–12V
REF
Logic input levels
V
LC
= 0 V
V
V
Low
0.8
V
V
IL
High
2.0
IH
Logic input current
V
LC
= 0 V
I
I
Low
V
= –10 V to +0.8 V
–2.0
–10
10
µA
µA
IL
IN
High
V
= 2.0 V to 18 V
V– = –15 V
0.002
IH
IN
V
V
Logic input swing
–10
–10
+18
+13.5
–3.0
V
V
IS
Logic threshold range
Reference bias current
Reference input slew rate
Power supply sensitivity
Positive
V = ±15 V
S
THR
I
15
–1.0
8.0
µA
dl/dt
4.0
mA/µs
I
= 1 mA
REF
PSSI
V+ = 4.5 to 5.5 V, V– = –15 V;
V+ = 13.5 to 16.5 V, V– = –15 V
0.0003
0.002
0.01
0.01
%FS/%VS
%FS/%VS
FS+
PSI
Negative
V– = –4.5 to –5.5 V, V+ = +15 V;
V– = –13.5 to –16.5 V, V+ = +15 V
FS–
Power supply current
Positive
I+
I–
3.1
3.8
mA
mA
V
S
= ±5 V, I
= 1.0 mA
REF
Negative
–4.3
–5.8
I+
I–
Positive
3.1
3.8
mA
mA
V
S
= +5 V, –15 V, I
= 2.0 mA
REF
Negative
–7.1
–7.8
I+
I–
Positive
3.2
3.8
mA
mA
V
S
= ±15 V, I
= 2.0 mA
REF
Negative
–7.2
–7.8
P
D
Power dissipation
±5 V, I
= 1.0 mA
REF
37
48
mW
mW
mW
+5 V, –15 V, I
= 2.0 mA
122
156
136
174
REF
±15 V, I
= 2.0 mA
REF
5
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
AC ELECTRICAL CHARACTERISTICS
DAC-08C
DAC-08E
Typ
DAC-08H
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
Min
Typ
Max
Min
Max
Min
Typ
Max
To ± 1/2LSB, all bits
t
Settling time
switched on or off,
70
135
70
135
70
135
ns
ns
S
T
amb
= 25 °C
Propagation delay
Low-to-High
t
t
T
= 25 °C, each bit.
PLH
amb
High-to-Low
All bits switched
35
60
35
60
35
60
PHL
TEST CIRCUITS
V–
3
V+
V
REF
R
REF
16
14
13
DAC-08
4
R
f
15
5-12
1
2
R15
–
CONTROL
LOGIC
ERROR
OUTPUT
NE5534
+
REFERENCE DAC
ACCURACY > 0.006%
SL00003
Figure 3. Relative Accuracy Test Circuit
V
CC
0.1 µF
2.4 V
1.4 V
e
IN
13
0.4 V
+2.0 V
DC
t
= t = 10 ns
5
PHL PLH
USE R to GND
L
1.0 kΩ
1.0 V
14
15
6
7
8
FOR TURN OFF
MEASUREMENT
SETTLING TIME
0.1 µF
FOR SETTLING TIME
1
2
4
16
R
R = 500 Ω
L
1.0 kΩ
L
DAC-08
9
10
11
MEASUREMENT
(ALL BITS
0
e
O
t
= 70 ns TYPICAL
TO ±1/2 LSB
S
SWITCHED LOW
TO HIGH)
12
e
IN
51 Ω
15 pF
C
≤ 25 pF
O
0
TRANSIENT
RESPONSE
0.1 µF
R
= 50 Ω
3
L
PIN 4 TO GND
-100 mV
V
t
t
EE
PLH
PHL
SL00004
Figure 4. Transient Response and Settling Time
6
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
TEST CIRCUITS (Continued)
V
CC
2V
0
R
IN
V
13
IN
1 kΩ
5
6
7
R
= 200 Ω
EQ
R
P
14
15
8
9
1
2
DAC-08
10
11
12
4
16
OPEN
10%
0
dI
dt
dV
dt
I
90%
SCOPE
R
L
+
2.0 mA
R
0.1 µF
L
3
SLEWING TIME
V
EE
SL00005
Figure 5. Reference Current Slew Rate Measurement
V
CC
I
CC
13
I
14
R
14
R
5
6
7
14
A
A
A
V
(+)
REF
1
2
3
I
15
15
1
8
9
15
A
A
4
5
DAC-08
DIGITAL
INPUTS
2
4
10
11
12
V
A
A
A
O
6
7
8
OUTPUT
16
I
O
(+)
I
R
I
I
L
C
V
3
I
EE
NOTES:
(See text for values of C.)
V
EE
Typical values of R = R = 1 kΩ
14
15
V
= +2.0 V
REF
C = 15 pF
V and I apply to inputs A through A
8
I
I
1
The resistor tied to Pin 15 is to temperature compensate the bias current and may not be necessary for all applications.
A
A
A
A
8
256
A
A
A
A
7
128
3
5
6
1
2
4
I
+ K
)
)
)
)
)
)
)
Ť
Ť
O
2
4
8
16
32
64
V
REF
where K [
R
14
and A = ‘1’ if A is at High Level
N
N
A
= ‘0’ if A is at Low Level
N
N
SL00006
Figure 6. Notation Definitions
7
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
TYPICAL PERFORMANCE CHARACTERISTICS
Output Current vs Output Voltage
(Output Voltage Compliance)
True and Complementary Output
Operation
Fast Pulsed Reference Operation
ALL BITS ON
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
T
= T
TO T
A
min
max
2.5V
0mA
I
V
OUT
IN
I
= 2mA
V– = –15V V– = –5V
REF
0.5V
1.0mA
2.0mA
–0.5mA
I
OUT
I
= 1mA
REF
I
–2.5mA
OUT
I
= 0.2mA
REF
(00000000)
(11111111)
200ns/division
–14 –10 –6 –2
0
2
6
10
14 18
OUTPUT VOLTAGE (V)
R
= 200Ω, R = 100Ω, CC = 0
EQ
L
Full-Scale Current vs
Reference Current
Full-Scale Settling Time
LSB Switching
5.0
4.0
3.0
2.0
1.0
0
ALL BITS SWITCHED ON
LIMIT FOR
V–=–15V
T
= T
TO T
max
A
min
ALL BITS “HIGH”
2.4V
0.4V
2.4V
BIT 8
LOGIC
INPUT
0.4V
0V
OUTPUT – 1/2LSB
0
8µA
SETTLING +1/2LSB
LIMIT FOR
V–=–5V
I
OUT
0
50ns/DIVISIOM
50ns/DIVISIOM
I
=2mA, R =1kΩ 1/2LSB=4µA
FS
L
0
1.0
2.0
3.0
4.0
5.0
I
— REFERENCE CURRENT (mA)
REF
LSB Propagation Delay vs IFS
Reference Input Frequency Response
500
400
300
200
100
0
6
4
2
0
–2
–4
–6
–8
1
2
R14=R15=1kΩ
≤ 500Ω
3
1LSB=7.8µA
R
L
–10 ALL BITS “ON”
–12 VR15 = 0V
–14
1LSB=78nA
0.1
0.2
0.5
1.0
2.0
5.0
10
FREQUENCY (MHz)
I
— OUTPUT FULL SCALE CURRENT (mA)
FS
NOTES:
Curve 1: CC = 15pF, V = 2.0V
centered at +1.0V
P-P
P-P
IN
Curve 1: CC = 15pF, V = 5m0V
centered at +200mV
centered at 0V
P-P
IN
Curve 1: CC = 15pF, V = 100m0V
IN
and applied through 50Ω connected to Pin 14.
+2.0V applied to R
.
14
SL00007
Figure 7. Typical Performance Characteristics
8
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Reference AMP Common-Mode Range
Logic Input Current vs Input Voltage
V
TH
– V vs Temperature
All Bits On
LC
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
8.0
6.0
4.0
2.0
0
2.0
T
= T
to T
MIN MAX
A
1.8
1.6
1.4
1.2
1.o
0.8
0.6
0.4
0.2
0
V– = –15V V– = –5V V+ = +5V
I
= 2mA
REF
I
I
= 1mA
REF
= 0.2mA
REF
–14 –10 –6 –2
0
2
6
10 14 18
–50
0
50
100
150
–12 –8 –4
0
4
8
12 16
TEMPERATURE (°C)
V
— REFERENCE COMMON MODE VOLTAGE (V)
LOGIC INPUT VOLTAGE (V)
15
POSITIVE COMMON-MODE RANGE IS ALWAYS (V+) –1.5V.
Output Voltage Compliance
vs Temperature
Bit Transfer Characteristics
Power Supply Current vs V+
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
8
20
16
ALL BITS HIGH OR LOW
7
I–
I
= 2.0mA
6
5
4
3
REF
B
1
12
Shaded area indicates
permissible output voltage
8
range for V– = -15V, I
≤ 2.0mA
REF
REF
4
0
I+
For other V– or I
2
B
2
See “Output Current vs Output
Voltage” curve on previous page
1
0
B
B
3
4
5
–4
V– = –15V
V– = –5V
–50
0
50
100
150
V+ – POSITIVE POWER SUPPLY (V
)
DC
–8
B
–12
–12
–8
–4
0
4
8
12
16
–50
0
50
100
150
LOGIC INPUT VOLTAGE (V)
TEMPERATURE (°C)
NOTES:
through B 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
B
1
8
(V
= 0.0V).
LC
Maximum Reference Input Frequency
vs Compensation Capacitor Value
Power Supply Current vs V–
Power Supply Current vs Temperature
8
8
10,000
1,000
100
BITS MAY BE HIGH OR LOW
BITS MAY BE HIGH OR LOW
7
7
6
5
4
3
2
1
0
I– WITH I
= 2mA
REF
V– = +15V
I–
6
5
4
3
2
1
0
I
= 2.0mA
REF
I– WITH I
= 1mA
REF
I– WITH I
= 0.2mA
REF
V+ = +15V
I+
I+
0
–4.0
–8.0
–12
–16
–20
–50
0
50
100
150
V– — NEGATIVE POWER SUPPLY (V
)
TEMPERATURE (°C)
DC
10
1
1000
100
10
C
(pF)
C
SL00008
Figure 8. Typical Performance Characteristics (cont.)
9
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
TYPICAL APPLICATION
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.
+V
REF
OPTIONAL RESISTOR
FOR OFFSET
INPUTS
R
IN
R
R
REF
14
15
4
2
0V
REQ
=200Ω
16
P
Output Current Range
NO CAP
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.
NOTES:
REQ = R || R
IN
Typical Values
P
R
= 5kΩ
IN
+V = 10V
Accuracy
IN
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.
SL00009
Pulsed Referenced Operation
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
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
bipolar reference signals, as in the multiplying mode, R can be
15
tied to a negative voltage corresponding to the minimum input level.
R
may be eliminated with only a small sacrifice in accuracy and
15
DAC-08 full-scale current is trimmed to the same value with R so
14
temperature drift.
that a zero value appears at the error amplifier output. The counter
is activated and the error band may be displayed on the
The compensation capacitor value must be increased as R value
14
oscilloscope, detected by comparators, or stored in a peak detector.
is increased. This is in order to maintain proper phase margin. For
R
values of 1.0, 2.5, and 5.0 kΩ, minimum capacitor values are
14
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.
15, 37, and 75 pF, respectively. The capacitor may be tied to either
or ground, but using V increases negative supply rejection.
V
EE
EE
(Fluctuations in the negative supply have more effect on accuracy
than do any changes in the positive supply.)
Monotonicity
A negative reference voltage may be used if R is grounded and
14
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.
the reference voltage is applied to R as shown. A high input
impedance is the main advantage of this method. The negative
15
reference voltage must be at least 3.0 V above the V supply.
EE
Bipolar input signals may be handled by connecting R to a positive
14
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
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
logic is to be used as the reference, R should be formed of two
14
series resistors with the junction of the two resistors bypassed with
0.1 µF to ground. For reference voltages greater than 5.0 V, a clamp
diode is recommended between Pin 14 and ground.
8-bit accuracy. This time applies when R <500 Ω and C <25 pF.
L
O
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.
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.
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 µF supply bypassing for low frequencies,
minimum scope lead length, and avoidance of ground loops are all
mandatory.
10
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
SETTLING TIME AND PROPAGATION DELAY
V
+ = +15V
S
V
IN
C
3
V
ADJ
Q
1
D
3
R
= 1000Ω
2
R
= 1000Ω
1
V
OUT
R
= 5kΩ
5
6 7 8 9 10 11 12
14
V
= 10V
REF
14
15
4
V
OUT
I
= 2mA
REF
DUT
16
D
2
1
R
= 500Ω
3
3
1
C
4
D
2
50Ω
C
5
C
R
= 5kΩ
C
S
1
15
2
V
– = –15V
NOTES:
D
D
C
, D = IN6263 or equivalent
= IN914 or equivalent
= 0.01µF
1
3
1
2
2
C
, C = 0.1µF
3
Q
= 2N3904
1
C
, C = 15pF and includes all probe and fixturing capacitance.
4
5
SL00010
Figure 10. Settling Time and Propagation Delay
BASIC DAC-08 CONFIGURATION
MSB
2
3
4
8
5
6
7
LSB
+V
REF
I
REF
R
REF
5
6
7
9 10 11 12
I
I
(LOW T.C.)
O
14
4
2
DAC-08
15
O
3
16
1
13
V–
V+
C
COMP
0.1µF
0.1µF
NOTES:
) V
255
256
REF
I
[
x
;
I
) I
+ I
for all logic states
FS
O
O
FS
R
REF
SL00011
Figure 11. Basic DAC-08 Configuration
11
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
RECOMMENDED FULL-SCALE AND ZERO-SCALE ADJUST
V
REF
R
1
R
2
14
15
4
2
DAC-08
R
3
R
= 1MΩ
4
V–
V+
R
= 20kΩ
S
NOTES:
R
R
R
= low T.C.
1
3
2
= R + R
1
2
≈ 0.1 R to minimize pot. contribution to full-scale drift
1
SL00012
Figure 12. Recommended Full-Scale and Zero-Scale Adjust
UNIPOLAR VOLTAGE OUTPUT FOR LOW IMPEDANCE OUTPUT
5kΩ (LOW T.C.)
I
R
= 2mA
–
4
2
NE531
OR
EQUIV
V
=
OUT
14
15
DAC-08
0 TO +10V
+
5kΩ
SL00013
Figure 13. Unipolar Voltage Output for Low Impedance Output
12
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
UNIPOLAR VOLTAGE OUTPUT FOR HIGH IMPEDANCE OUTPUT
V = 10V
5kΩ
5kΩ
V
V
OUT
OUT
4
2
I
R
= 2mA
DAC-08
14
a. Positive Output
V
OUT
4
I
R
= 2mA
DAC-08
14
2
V
OUT
a. Negative Output
SL00014
Figure 14. Unipolar Voltage Output for High Impedance Output
BASIC BIPOLAR OUTPUT OPERATION (OFFSET BINARY)
V = 10V
10kΩ
10kΩ
4
2
I
R
= 2mA
DAC-08
V
14
OUT
V
OUT
B
B
B
3
B
B
B
B
B
8
V
V
OUT
1
2
4
5
6
7
OUT
Positive full-scale
1
1
1
1
1
1
1
1
1
1
0
–9.920V
–9.840V
+10.000
+9.920
Positive FS – 1LSB
1
1
1
1
1
+ Zero-scale + 1LSB
Zero-scale
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
–0.080V
0.000
+0.160
+0.080
Zero-scale – 1LSB
0
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
1
0
0.080
+9.920
0.000
–9.840
–9.920
Negative full scale – 1LSB
Negative full scale
+10.000
SL00015
Figure 15. Basic Bipolar Output Operation (Offset Binary)
13
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
DIP16: plastic dual in-line package; 16 leads (300 mil)
SOT38-4
14
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
15
2001 Aug 03
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
Data sheet status
Product
status
Definitions
[1]
Data sheet status
[2]
Objective data
Development
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.
Preliminary data
Product data
Qualification
Production
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.
[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.
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.
Righttomakechanges—PhilipsSemiconductorsreservestherighttomakechanges, withoutnotice, intheproducts, includingcircuits,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.
Koninklijke Philips Electronics N.V. 2001
Contact information
All rights reserved. Printed in U.S.A.
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
Date of release: 10-01
9397 750 08922
For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.
Document order number:
Philips
Semiconductors
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