PHILIPS DAC-08HN 8-bit high-speed multiplying d/a converter Datasheet

INTEGRATED CIRCUITS
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
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DESCRIPTION
DAC-08 Series
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
VLC 1
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.
16 COMP
IO 2
15 VREF–
V– 3
14 V
REF+
IO 4
13 V+
B1 (MSB) 5
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.
12 B8 (LSB)
B2 6
11 B7
B3 7
10 B6
B4 8
9
B5
TOP VIEW
D1 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.
V+ 1
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
16 B8 (LSB)
VREF+ 2
15 B7
VREF– 3
14 B6
COMPEN 4
13 B5
VLC 5
12 B4
IO 6
11 B3
V– 7
10 B2
IO 8
9
B1 (MSB)
TOP VIEW
NOTE:
1. SO and non-standard pinouts.
SL00001
Figure 1. Pin Configuration
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
2001 Aug 03
2
853-0045 26832
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
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
V+
MSB
B1
VLC
13
1
5
B2
6
B3
B4
7
8
B5
9
B6
10
LSB
B8
B7
11
12
4
BIAS
NETWORK
CURRENT
SWITCHES
14
VREF(+)
VREF(–)
IOUT
IOUT
2
+
–
15
REFERENCE
AMPLIFIER
16
COMP.
3
V–
SL00002
Figure 2. Block Diagram
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
RATING
UNIT
36
V
V+ to V–
Power supply voltage
V5–V12
Digital input voltage
VLC
Logic threshold control
V– to V+
V0
Applied output voltage
V– to +18
V
I14
Reference current
5.0
mA
V14, V15
Reference amplifier inputs
PD
Maximum power dissipation Tamb = 25 °C (still-air)1
N package
D package
TSOLD
Lead soldering temperature (10 sec max)
Tamb
Operating temperature range
Tstg
Storage temperature range
V– to V– plus 36 V
VEE to VCC
NOTE:
1. Derate above 25 °C, at the following rates:
N package at 11.6mW/°C
D package at 8.7mW/°C
2001 Aug 03
3
1450
1090
mW
mW
230
°C
0 to +70
°C
–65 to +150
°C
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 R15 is returned. VCC = ±15V , IREF = 2.0 mA.
Output characteristics refer to both IOUT and IOUT unless otherwise noted. Tamb = 0 °C to 70 °C.
DAC-08C
SYMBOL
PARAMETER
TEST CONDITIONS
DAC-08E
UNIT
Min
Typ
Max
Min
Typ
Max
Resolution
8
8
8
8
8
8
Bits
Monotonicity
8
8
8
8
8
8
Bits
±0.39
±0.19
%FS
±0.78
±0.39
%FS
Relative accuracy
Over temperature range
Differential non-linearity
TCIFS
Full-scale tempco
VOC
Output voltage compliance
IFS4
Full-scale current
IFSS
Full-scale symmetry
IZS
Zero-scale current
IFSR
Full-scale output current
range
±10
Full-scale current change< 1/2LSB
–10
VREF = 10.000V;
R14, R15=5.000 kΩ
1.94
IFS4-IFS2
R14, R15=5.000 kΩ
VREF = +15.0 V, V– = –10 V
VREF = +25.0 V, V– = –12 V
–10
1.99
2.04
1.94
±2.0
0.2
Logic input levels
Low
High
VLC = 0 V
IIL
IIH
Logic input current
Low
High
VLC = 0 V
VIN = –10 V to +0.8 V
VIN = 2.0 V to 18 V
VIS
Logic input swing
V– = –15 V
–10
VTHR
Logic threshold range
VS = ±15 V
–10
I15
Reference bias current
dl/dt
Reference input slew rate
V
1.99
2.04
mA
±16
±1.0
±8.0
µA
4.0
0.2
2.0
µA
2.1
4.2
mA
mA
0.8
2.0
0.8
V
V
–10
10
µA
µA
+18
V
2.0
–2.0
0.002
–1.0
4.0
ppm/°C
+18
2.1
4.2
VIL
VIH
Power supply sensitivity
±10
+18
–10
10
–2.0
0.002
+18
–10
+13.5
–10
–3.0
8.0
–1.0
4.0
+13.5
V
–3.0
µA
8.0
mA/µs
IREF = 1 mA
PSSIFS+
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
PSIFS–
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
0 mA
VS = ±5 V
V, IREF = 1
1.0
3.1
–4.3
3.8
–5.8
3.1
–4.3
3.8
–5.8
mA
mA
I+
I–
Power supply current
Positive
Negative
I+
I–
Positive
Negative
VS = +5 V
V, –15 V
V, IREF = 2
2.0
0 mA
3.1
–7.1
3.8
–7.8
3.1
–7.1
3.8
–7.8
mA
mA
I+
I–
Positive
Negative
VS = ±15 V
V, IREF = 2
2.0
0 mA
3.2
–7.2
3.8
–7.8
3.2
–7.2
3.8
–7.8
mA
mA
±5 V, IREF = 1.0 mA
+5 V, –15 V, IREF = 2.0 mA
±15 V, IREF = 2.0 mA
37
122
156
48
136
174
37
122
156
48
136
174
mW
mW
mW
PD
2001 Aug 03
Power dissipation
4
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 R15 is returned. VCC = +15 V, IREF = 2.0 mA.
Output characteristics refer to both IOUT and IOUT, unless otherwise noted. Tamb = 0 °C to 70 °C.
PARAMETER
SYMBOL
TEST CONDITIONS
Resolution
Monotonicity
Relative accuracy
Differential non-linearity
TCIFS
Full-scale tempco
VOC
Output voltage compliance
IFS4
Full-scale current
IFSS
Full-scale symmetry
IZS
Zero-scale current
IFSR
Full-scale output current range
Typ
Max
8
8
8
8
8
8
Bits
Bits
±0.1
±0.19
%FS
%FS
±10
±50
ppm/°C
+18
V
1.992
2.000
mA
±1.0
±4.0
µA
0.2
1.0
µA
Full-scale current change 1/2LSB
–10
VREF = 10.000 V, R14, R15 = 5.000 kΩ
1.984
IFS4–IFS2
Logic input levels
Low
High
VLC = 0 V
VIL
VIH
IIL
IIH
Logic input current
Low
High
VLC = 0 V
VIN = –10 V to +0.8 V
VIN = 2.0 V to 18 V
VIS
Logic input swing
V– = –15 V
VTHR
Logic threshold range
VS = ±15 V
I15
Reference bias current
dl/dt
Reference input slew rate
Power supply sensitivity
Min
Over temperature range
R14, R15 = 5.000 kΩ
VREF = +15.0 V, V– = –10 V
VREF=+25.0V, V–=–12V
UNIT
DAC-08H
2.1
4.2
mA
mA
0.8
V
V
–10
10
µA
µA
–10
+18
V
–10
+13.5
V
2.0
–2.0
0.002
–1.0
4.0
–3.0
8.0
µA
mA/µs
IREF = 1 mA
PSSIFS+
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
PSIFS–
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
0 mA
VS = ±5 V
V, IREF = 1
1.0
3.1
–4.3
3.8
–5.8
mA
mA
I+
I–
Power supply current
Positive
Negative
I+
I–
Positive
Negative
VS = +5 V
V, –15 V
V, IREF = 2
2.0
0 mA
3.1
–7.1
3.8
–7.8
mA
mA
I+
I–
Positive
Negative
VS = ±15 V
V, IREF = 2
2.0
0 mA
3.2
–7.2
3.8
–7.8
mA
mA
±5 V, IREF = 1.0 mA
+5 V, –15 V, IREF = 2.0 mA
±15 V, IREF = 2.0 mA
37
122
156
48
136
174
mW
mW
mW
PD
2001 Aug 03
Power dissipation
5
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
AC ELECTRICAL CHARACTERISTICS
SYMBOL
tS
PARAMETER
DAC-08C
TEST CONDITIONS
Min
To ± 1/2LSB, all bits
switched on or off,
Tamb = 25 °C
Settling time
DAC-08E
Typ
Max
70
35
Min
DAC-08H
Typ
Max
135
70
60
35
Min
Typ
Max
135
70
135
60
35
60
UNIT
ns
Propagation delay
tPLH
Low-to-High
Tamb = 25 °C, each bit.
tPHL
High-to-Low
All bits switched
ns
TEST CIRCUITS
VREF
V–
V+
3
13
RREF
16
14
DAC-08
15
5-12
4
1
Rf
2
R15
–
NE5534
CONTROL
LOGIC
ERROR
OUTPUT
+
REFERENCE DAC
ACCURACY > 0.006%
SL00003
Figure 3. Relative Accuracy Test Circuit
VCC
0.1 µF
2.4 V
eIN
13
+2.0 VDC
5
6
7
8
eIN
9
10
11
12
51 Ω
DAC-08
14
15
1
2
4
16
15 pF
0.1 µF
tPHL = tPLH = 10 ns
1.0 kΩ
1.0 kΩ
1.4 V
0.4 V
1.0 V
RL
SETTLING TIME
0.1 µF
FOR SETTLING TIME
MEASUREMENT
eO (ALL BITS
SWITCHED LOW
TO HIGH)
CO ≤ 25 pF
RL = 500 Ω
0
tS = 70 ns TYPICAL
TO ±1/2 LSB
TRANSIENT 0
RESPONSE
-100 mV
3
USE RL to GND
FOR TURN OFF
MEASUREMENT
VEE
RL = 50 Ω
PIN 4 TO GND
tPLH
tPHL
SL00004
Figure 4. Transient Response and Settling Time
2001 Aug 03
6
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
TEST CIRCUITS (Continued)
VCC
2V
RIN
13
1 kΩ
REQ = 200 Ω
5
6
14
7
15
0
VIN
RP
1
8
DAC-08
9
2
10
4
11
16
OPEN
12
10%
RL
0.1 µF
3
dI
dt
SCOPE
I dV
+
R L dt
0
90%
2.0 mA
SLEWING TIME
VEE
SL00005
Figure 5. Reference Current Slew Rate Measurement
VCC
ICC
13
I14
A1
A2
A3
A4
A5
DIGITAL
INPUTS
A6
A7
A8
(+)
5
R14
14
VREF (+)
6
7
15
8
1
DAC-08
9
I15
R15
2
10
VO
OUTPUT
4
11
12
16
IO
RL
II
VI
C
3
IEE
NOTES:
(See text for values of C.)
Typical values of R14 = R15 = 1 kΩ
VREF = +2.0 V
VEE
C = 15 pF
VI and II apply to inputs A1 through A8
The resistor tied to Pin 15 is to temperature compensate the bias current and may not be necessary for all applications.
I
O
+ K
Ť
A1
2
where K [
)
A2
4
)
A3
8
)
A4
16
)
A5
32
)
A6
64
)
A8
A7
)
256
128
Ť
V REF
R 14
and AN = ‘1’ if AN is at High Level
AN = ‘0’ if AN is at Low Level
SL00006
Figure 6. Notation Definitions
2001 Aug 03
7
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
OUTPUT CURRENT (mA)
3.2
TA = Tmin TO Tmax
2.8
2.5V
0mA
VIN
2.4
V– = –15V
IREF = 2mA
V– = –5V
2.0
0.5V
1.0mA
–0.5mA
1.6
IOUT
IREF = 1mA
1.2
IOUT
2.0mA
–2.5mA
0.8
IREF = 0.2mA
0.4
(00000000)
0
–14 –10
–6 –2 0 2
6
10
OUTPUT VOLTAGE (V)
14
(11111111)
200ns/division
18
REQ = 200Ω, RL = 100Ω, CC = 0
Full-Scale Settling Time
Full-Scale Current vs
Reference Current
LSB Switching
2.4V
I FS – OUTPUT CURRENT (mA)
ALL BITS SWITCHED ON
BIT 8 2.4V
LOGIC
INPUT
0.4V
0V
0.4V
OUTPUT – 1/2LSB
0
SETTLING +1/2LSB
8µA
IOUT
0
50ns/DIVISIOM
50ns/DIVISIOM
IFS=2mA, RL=1kΩ 1/2LSB=4µA
5.0
TA = Tmin TO Tmax
ALL BITS “HIGH”
LIMIT FOR
V–=–15V
4.0
3.0
LIMIT FOR
V–=–5V
2.0
1.0
0
0
LSB Propagation Delay vs IFS
1.0
2.0
3.0
4.0
5.0
IREF — REFERENCE CURRENT (mA)
Reference Input Frequency Response
500
6
RELATIVE OUTPUT (dB)
4
400
300
200
1LSB=7.8µA
100
10
5.0
2.0
1.0
0.5
0.2
0.1
.05
.02
1LSB=78nA
0
.05
.01
PROPAGATION DELAY (ns)
IOUT
2
0
–2
–4
–6
–8
1
–10
RL ≤ 500Ω
ALL BITS “ON”
–12
VR15 = 0V
–14
0.1
2
R14=R15=1kΩ
0.2
3
0.5
1.0
2.0
FREQUENCY (MHz)
5.0
10
IFS — OUTPUT FULL SCALE CURRENT (mA)
NOTES:
Curve 1:
Curve 1:
Curve 1:
CC = 15pF, VIN = 2.0VP-P centered at +1.0V
CC = 15pF, VIN = 5m0VP-P centered at +200mV
CC = 15pF, VIN = 100m0VP-P centered at 0V
and applied through 50Ω connected to Pin 14.
+2.0V applied to R14.
Figure 7. Typical Performance Characteristics
2001 Aug 03
8
SL00007
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Logic Input Current vs Input Voltage
2.4
V– = –5V
V+ = +5V
IREF = 2mA
1.6
1.2
0.8
IREF = 1mA
IREF = 0.2mA
0.4
0
–14 –10 –6
–2 0 2
6
10
8.0
6.0
4.0
2.0
0
–12
14 18
–8 –4
0
4
8 12
LOGIC INPUT VOLTAGE (V)
V15 — REFERENCE COMMON MODE VOLTAGE (V)
POSITIVE COMMON-MODE RANGE IS ALWAYS (V+) –1.5V.
1.4
16
1.2
12
Shaded area indicates
permissible output voltage
8
range for V– = -15V, IREF ≤ 2.0mA
4
For other V– or IREF
See “Output Current vs Output
Voltage” curve on previous page
0
–4
IREF = 2.0mA
B2
0.4
B3
V– = –15V
V– = –5V
0
–12
–12
0
50
100
150
TEMPERATURE (°C)
–8
8
7
150
ALL BITS HIGH OR LOW
I–
6
5
4
3
I+
2
1
0
–50
0
50
100
150
V+ – POSITIVE POWER SUPPLY (VDC)
B4
–8
–50
B1
0.8
0.2
0
50
100
TEMPERATURE (°C)
Power Supply Current vs V+
1.0
0.6
–50
16
Bit Transfer Characteristics
20
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
Output Voltage Compliance
vs Temperature
2.0
1.8
1.6
1.4
1.2
1.o
0.8
0.6
0.4
0.2
0
POWER SUPPLY CURRENT (mA)
V– = –15V
2.0
VTH – VLC vs Temperature
(V)
TA = TMIN to TMAX
2.8
LOGIC INPUT CURRENT ( µ A)
OUTPUT CURRENT (mA)
3.2
VTHLC– V
Reference AMP Common-Mode Range
All Bits On
B5
–4
0
4
8
12
LOGIC INPUT VOLTAGE (V)
16
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).
BITS MAY BE HIGH OR LOW
I– WITH IREF = 2mA
7
6
I– WITH IREF = 1mA
5
4
I– WITH IREF = 0.2mA
3
2
I+
1
0
0
–4.0
–8.0
–12
–16
–20
V– — NEGATIVE POWER SUPPLY (VDC)
8
BITS MAY BE HIGH OR LOW
V– = +15V
I–
7
Maximum Reference Input Frequency
vs Compensation Capacitor Value
10,000
6
IREF = 2.0mA
5
4
3
V+ = +15V
F
(kHz)
MAX
8
Power Supply Current vs Temperature
POWER SUPPLY CURRENT (mA)
POWER SUPPLY CURRENT (mA)
Power Supply Current vs V–
I+
2
1
1,000
100
0
–50
0
50
100
TEMPERATURE (°C)
150
10
1
100
10
1000
CC (pF)
SL00008
Figure 8. Typical Performance Characteristics (cont.)
2001 Aug 03
9
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
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.
+VREF
OPTIONAL RESISTOR
FOR OFFSET
INPUTS
RIN
0V
RP
RREF
14
REQ
=200Ω 15 16
4
2
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 = RIN || RP
Typical Values
RIN = 5kΩ
+VIN = 10V
Pulsed Referenced Operation
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.
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, R15 can be
tied to a negative voltage corresponding to the minimum input level.
R15 may be eliminated with only a small sacrifice in accuracy and
temperature drift.
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 R14 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.
The compensation capacitor value must be increased as R14 value
is increased. This is in order to maintain proper phase margin. For
R14 values of 1.0, 2.5, and 5.0 kΩ, minimum capacitor values are
15, 37, and 75 pF, respectively. The capacitor may be tied to either
VEE or ground, but using VEE increases negative supply rejection.
(Fluctuations in the negative supply have more effect on accuracy
than do any changes in the positive supply.)
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 negative reference voltage may be used if R14 is grounded and
the reference voltage is applied to R15 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 VEE supply.
Bipolar input signals may be handled by connecting R14 to a positive
reference voltage equal to the peak positive input level at Pin 15.
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.
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, R14 should be formed of two
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.
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 RL<500 Ω and CO<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.
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.
2001 Aug 03
DAC-08 Series
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
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
SETTLING TIME AND PROPAGATION DELAY
VS + = +15V
VIN
C3
VADJ
Q1
D3
R2 = 1000Ω
R1 = 1000Ω
R14 = 5kΩ
VREF = 10V
5
VOUT
6 7 8 9 10 11 12
14
4
IREF = 2mA
VOUT
DUT
D1
2
15
16
3
1
C1
R15 = 5kΩ
C2
D2
50Ω
C5
R3 = 500Ω
C4
VS – = –15V
NOTES:
D1, D2 = IN6263 or equivalent
D3 = IN914 or equivalent
C1 = 0.01µF
C2, C3 = 0.1µF
Q1 = 2N3904
C4, C5 = 15pF and includes all probe and fixturing capacitance.
SL00010
Figure 10. Settling Time and Propagation Delay
BASIC DAC-08 CONFIGURATION
MSB 2
3 4 5 6 7
LSB
+VREF
RREF
IREF
5
(LOW T.C.)
6 7 8 9 10 11 12
14
4
IO
2
IO
DAC-08
15
3
16
13
V–
1
V+
CCOMP
0.1µF
0.1µF
NOTES:
I
FS
V REF
255
x
; I
O
256
R REF
I
O
I
FS
for all logic states
SL00011
Figure 11. Basic DAC-08 Configuration
2001 Aug 03
11
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
RECOMMENDED FULL-SCALE AND ZERO-SCALE ADJUST
VREF
R1
R2
14
4
DAC-08
2
15
R3
R4 = 1MΩ
V–
V+
RS = 20kΩ
NOTES:
R1 = low T.C.
R3 = R1 + R2
R2 ≈ 0.1 R1 to minimize pot. contribution to full-scale drift
SL00012
Figure 12. Recommended Full-Scale and Zero-Scale Adjust
UNIPOLAR VOLTAGE OUTPUT FOR LOW IMPEDANCE OUTPUT
5kΩ (LOW T.C.)
IR = 2mA
–
NE531
OR
EQUIV
+
4
14
15
DAC-08
2
VOUT =
0 TO +10V
5kΩ
SL00013
Figure 13. Unipolar Voltage Output for Low Impedance Output
2001 Aug 03
12
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
VOUT
4
IR = 2mA
DAC-08
14
2
VOUT
a. Positive Output
VOUT
4
IR = 2mA
DAC-08
14
2
VOUT
a. Negative Output
SL00014
Figure 14. Unipolar Voltage Output for High Impedance Output
BASIC BIPOLAR OUTPUT OPERATION (OFFSET BINARY)
V = 10V
10kΩ
10kΩ
4
IR = 2mA
DAC-08
VOUT
14
2
VOUT
B1
B2
B3
B4
B5
B6
B7
B8
VOUT
VOUT
Positive full-scale
1
1
1
1
1
1
1
1
–9.920V
+10.000
Positive FS – 1LSB
1
1
1
1
1
1
1
0
–9.840V
+9.920
+ 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
1
1
1
1
1
1
1
0.080
0.000
Negative full scale – 1LSB
0
0
0
0
0
0
0
1
+9.920
–9.840
Negative full scale
0
0
0
0
0
0
0
0
+10.000
–9.920
SL00015
Figure 15. Basic Bipolar Output Operation (Offset Binary)
2001 Aug 03
13
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DIP16: plastic dual in-line package; 16 leads (300 mil)
2001 Aug 03
14
DAC-08 Series
SOT38-4
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
SO16: plastic small outline package; 16 leads; body width 3.9 mm
2001 Aug 03
15
DAC-08 Series
SOT109-1
Philips Semiconductors
Product data
8-bit high-speed multiplying D/A converter
DAC-08 Series
Data sheet status
Data sheet status [1]
Product
status [2]
Definitions
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
Qualification
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.
Product data
Production
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.
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.
 Koninklijke Philips Electronics N.V. 2001
All rights reserved. Printed in U.S.A.
Contact information
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
Date of release: 10-01
For sales offices addresses send e-mail to:
[email protected].
2001 Aug 03
Document order number:
16
9397 750 08922