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Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
DESCRIPTION
The DAC08 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 70ns 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 DAC08 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 4.5V to 18V power supply range, with 37mW power consumption attainable at 5V supplies. The compact size and low power consumption make the DAC08 attractive for portable and military aerospace applications.
PIN CONFIGURATIONS
F, N Packages
VLC 1 IO 2 16 COMP 15 VREF- 14 V REF+ 13 V+ 12 B8 (LSB) 11 B7 10 B6 9 TOP VIEW B5
V- 3 IO 4 B1 (MSB) 5 B2 6 B3 7 B4 8
D1 Package
V+ 1 VREF+ 2 VREF- 3 16 B8 (LSB) 15 B7 14 B6 13 B5 12 B4 11 B3 10 B2 9 TOP VIEW NOTE: 1. SO and non-standard pinouts. B1 (MSB)
COMPEN 4 VLC 5 IO 6
FEATURES
V- 7 IO 8
* Fast settling output current--70ns * 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 -10V to +18V * True and complemented outputs * Wide range multiplying capability * Low FS current drift -- 10ppm/C * Wide power supply range--4.5V to 18V * Low power consumption--37mW at 5V
APPLICATIONS
* 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
* 8-bit, 1s A-to-D converters * Servo-motor and pen drivers
* Programmable gain and attenuation * Analog-Digital multiplication
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853-0045 13721
Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
ORDERING INFORMATION
DESCRIPTION 16-Pin Hermetic Ceramic Dual In-Line Package (Cerdip) 16-Pin Hermetic Ceramic Dual In-Line Package (Cerdip) 16-Pin Plastic Dual In-Line Package (DIP) 16-Pin Hermetic Ceramic Dual In-Line Package (Cerdip) 16-Pin Plastic Dual In-Line Package (DIP) 16-Pin Hermetic Ceramic Dual In-Line Package (Cerdip) 16-Pin Plastic Small Outline (SO) Package 16-Pin Plastic Dual In-Line Package (DIP) TEMPERATURE RANGE -55C to +125C -55C to +125C 0 to +70C 0 to +70C 0 to +70C 0 to +70C 0 to +70C 0 to +70C ORDER CODE DAC08F DAC08AF DAC08CN DAC08CF DAC08EN DAC08EF DAC08ED DAC08HN DWG # 0582B 0582B 0406C 0582B 0406C 0582B 0005D 0406C
BLOCK DIAGRAM
V+ 13 VLC 1 5 MSB B1 6 B2 7 B3 8 B4 9 B5 10 B6 11 B7 12 LSB B8
4 BIAS NETWORK CURRENT SWITCHES
IOUT IOUT
14 VREF(+) + - 15 REFERENCE AMPLIFIER
2
VREF(-)
16 COMP.
3 V-
ABSOLUTE MAXIMUM RATINGS
SYMBOL V+ to VV5-V12 VLC V0 I14 V14, V15 PD Power supply voltage Digital input voltage Logic threshold control Applied output voltage Reference current Reference amplifier inputs Maximum power dissipation TA=25C (still-air)1 F package N package D package TSOLD TA Lead soldering temperature (10sec max) Operating temperature range DAC08, DAC08A DAC08C, E, H TSTG Storage temperature range NOTES: 1. Derate above 25C, at the following rates: F package at 9.5mW/C N package at 11.6mW/C D package at 8.7mW/C -55 to +125 0 to +70 -65 to +150 C C C 1190 1450 1090 300 mW mW mW C PARAMETER RATING 36 V- to V- plus 36V V- to V+ V- to +18 5.0 VEE to VCC V mA UNIT V
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Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
DC ELECTRICAL CHARACTERISTICS
Pin 3 must be at least 3V more negative than the potential to which R15 is returned. VCC=15V, IREF=2.0mA. Output characteristics refer to both IOUT and IOUT unless otherwise noted. DAC08C, E, H: TA=0C to 70C DAC08/08A: TA=-55C to 125C SYMBOL PARAMETER Resolution Monotonicity Relative accuracy Differential non-linearity TCIFS VOC IFS4 IFSS IZS IFSR Full-scale tempco Output voltage compliance Full-scale current Full-scale symmetry Zero-scale current Full-scale output current range Logic input levels Low High Logic input current Low High Logic input swing Logic threshold range Reference bias current Reference input slew rate Power supply sensitivity PSSIFS+ PSIFSPositive IREF=1mA V+=4.5 to 5.5V, V-=-15V; V+=13.5 to 16.5V, V-=-15V Negative V-=-4.5 to -5.5V, V+=+15V; V-=-13.5 to -16.5, V+=+15V I+ II+ II+ IPD Power supply current Positive Negative Positive Negative Positive Negative Power dissipation 3.1 -4.3 3.1 -7.1 3.2 -7.2 37 122 156 3.8 -5.8 3.8 -7.8 3.8 -7.8 48 136 174 3.1 -4.3 3.1 -7.1 3.2 -7.2 37 122 156 3.8 -5.8 3.8 -7.8 3.8 -7.8 48 136 174 mW mA 0.002 0.01 0.002 0.01 0.0003 0.01 0.0003 0.01 %FS/%VS 4.0 R14, R15=5.000k VREF=+15.0V, V-=-10V VREF=+25.0V, V-=-12V VLC=0V VLC=0V VIN=-10V to +0.8V VIN=2.0V to 18V V-=-15V VS=15V -10 -10 -1.0 8.0 2.1 4.2 0.8 2.0 -2.0 0.002 -10 10 +18 +13.5 -3.0 4.0 -10 -10 -1.0 8.0 2.0 -2.0 0.002 -10 10 +18 +13.5 -3.0 A V V A mA/s Full-scale current change< 1/2LSB VREF=10.000V, R14, R15=5.000k IFS4-IFS2 -10 1.94 1.99 2.0 0.2 10 +18 2.04 16 4.0 2.1 4.2 0.8 -10 1.94 1.99 1.0 0.2 Over temperature range TEST CONDITIONS Min 8 8 DAC08C Typ 8 8 Max 8 8 0.39 0.78 10 +18 2.04 8.0 2.0 Min 8 8 DAC08E DAC08 Typ 8 8 Max 8 8 0.19 0.39 Bits Bits %FS %FS ppm/C V mA A A mA UNIT
VIL VIH IIL IIH VIS VTHR I15 dl/dt
V
VS=5V, IREF=1.0mA VS=+5V, -15V, IREF=2.0mA VS=15V, IREF=2.0mA 5V, IREF=1.0mA +5V, -15V, IREF=2.0mA 15V, IREF=2.0mA
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Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
DC ELECTRICAL CHARACTERISTICS (Continued)
Pin 3 must be at least 3V more negative than the potential to which R15 is returned. VCC = +15V, IREF = 2.0mA, Output characteristics refer to both IOUT and IOUT, unless otherwise noted. DAC08C, E, H: TA = 0C to 70C. DAC08/08A: TA = -55C to 125C. SYMBOL PARAMETER Resolution Monotonicity Relative accuracy Differential non-linearity TCIFS VOC IFS4 IFSS IZS IFSR Full-scale tempco Output voltage compliance Full-scale current Full-scale symmetry Zero-scale current Full-scale output current range Logic input levels Low High Logic input current Low High Logic input swing Logic threshold range Reference bias current Reference input slew rate Power supply sensitivity PSSIFS+ PSIFSPositive Negative Power supply current Positive Negative Positive Negative Positive Negative Power dissipation IREF=1mA V+=4.5 to 5.5V, V-=-15V; V+=13.5 to 16.5V, V-=-15V V-=-4.5 to -5.5V, V+=+15V; V-=-13.5 to -16.5, V+=+15V I+ II+ II+ IPD VS=5V, IREF=1.0mA VS=+5V, -15V, IREF=2.0mA VS=15V, IREF=2.0mA 5V, IREF=1.0mA +5V, -15V, IREF=2.0mA 15V, IREF=2.0mA 3.1 -4.3 3.1 -7.1 3.2 -7.2 37 122 156 3.8 -5.8 3.8 -7.8 3.8 -7.8 48 136 174 mW mA 0.002 0.01 0.0003 0.01 %FS/%VS 4.0 R14, R15=5.000k VREF=+15.0V, V-=-10V VREF=+25.0V, V-=-12V VLC=0V VLC=0V VIN=-10V to +0.8V VIN=2.0V to 18V V-=-15V VS=15V -10 -10 -1.0 8.0 2.1 4.2 0.8 2.0 -2.0 0.002 -10 10 +18 +13.5 -3.0 A V V A mA/s Full-scale current change 1/2LSB VREF=10.000V, R14, R15=5.000k IFS4-IFS2 -10 1.984 1.992 1.0 0.2 10 Over temperature range TEST CONDITIONS Min 8 8 DAC08H DAC08A Typ 8 8 Max 8 8 0.1 0.19 50 +18 2.000 4.0 1.0 Bits Bits %FS %FS ppm/C V mA A A mA UNIT
VIL VIH IIL IIH VIS VTHR I15 dl/dt
V
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Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
AC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER TEST CONDITIONS Min tS Settling time Propagation delay tPLH tPHL Low-to-High High-to-Low TA=25C, each bit. All bits switched 35 60 35 60 35 60 ns To 1/2LSB, all bits switched on or off, TA=25C DAC08C Typ 70 Max 135 Min DAC08E DAC08 Typ 70 Max 135 Min DAC08H DAC08A Typ 70 Max 135 ns UNIT
TEST CIRCUITS
VREF V- V+
RREF 16 14 3 13 4 1 2 Rf
DAC-08 15 R15 5-12
CONTROL LOGIC
- NE5534 +
ERROR OUTPUT
REFERENCE DAC ACCURACY > 0.006%
Figure 1. Relative Accuracy Test Circuit
0.1F VCC 2.4V 13 5 6 7 8 9 10 11 12 51 0.1F 3 DAC-08 14 15 1 2 4 16 +2.0VDC 1.0k 0.1F FOR SETTLING TIME MEASUREMENT eO (ALL BITS SWITCHED LOW TO HIGH) eIN 0.4V tPHL = tPLH = 10ns 1.0V SETTLING TIME RL = 500 0 tS = 70ns TYPICAL TO 1/2 LSB TRANSIENT 0 RESPONSE -100mV tPLH RL = 50 PIN 4 TO GND tPHL RL USE RL to GND FOR TURN OFF MEASUREMENT 1.4V
1.0k
eIN
15pF
CO 25pF
VEE
Figure 2. Transient Response and Settling Time
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Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
TEST CIRCUITS (Continued)
VCC RIN 13 5 6 7 8 9 10 11 12 RL SCOPE DAC-08 14 15 1 2 4 16 OPEN 10% 0 2.0mA SLEWING TIME VEE REQ = 200 1k RP VIN 2V 0
3
0.1F
dI I dV + R L dt dt
90%
Figure 3. Reference Current Slew Rate Measurement
VCC ICC 13 5 A1 A2 A3 DIGITAL INPUTS A4 A5 A6 A7 A8 (+) VI NOTES: (See text for values of C.) Typical values of R14 = R15 = 1k VREF = +2.0V C = 15pF IEE VEE II 3 6 7 8 9 10 11 12 4 16 IO C RL DAC-08 15 1 2 VO OUTPUT I15 R15 I14 14 R14 VREF (+)
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
A1
2
)
A2
4
)
A3
8
)
A4
16
)
A5
32
)
A6
64
)
A8 A7 ) 128 256
where K [
V REF R 14
and AN = `1' if AN is at High Level AN = `0' if AN is at Low Level
Figure 4. Notation Definitions
August 31, 1994
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Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
TYPICAL PERFORMANCE CHARACTERISTICS
Output Current vs Output Voltage (Output Voltage Compliance)
ALL BITS ON 3.2 OUTPUT CURRENT (mA) 2.8 2.4 V- = -15V 2.0 1.6 1.2 0.8 0.4 0 -14 -10 IREF = 0.2mA (00000000) -6 -2 0 2 6 10 OUTPUT VOLTAGE (V) 14 18 200ns/division REQ = 200, RL = 100, CC = 0 (11111111) IREF = 1mA IOUT -2.5mA 2.0mA IOUT V- = -5V IREF = 2mA TA = Tmin TO Tmax VIN 0.5V -0.5mA 1.0mA 2.5V 0mA IOUT
Fast Pulsed Reference Operation
True and Complementary Output Operation
Full-Scale Settling Time
ALL BITS SWITCHED ON 2.4V 0.4V OUTPUT - 1/2LSB 0 SETTLING +1/2LSB BIT 8 2.4V LOGIC INPUT 0.4V 0V 8A IOUT 0
LSB Switching
I FS - OUTPUT CURRENT (mA) 5.0
Full-Scale Current vs Reference Current
TA = Tmin TO Tmax ALL BITS "HIGH" 4.0 3.0 2.0 1.0 0 0 1.0 2.0 3.0 4.0 5.0 IREF -- REFERENCE CURRENT (mA) LIMIT FOR V-=-5V LIMIT FOR V-=-15V
50ns/DIVISIOM IFS=2mA, RL=1k 1/2LSB=4A
50ns/DIVISIOM
LSB Propagation Delay vs IFS
500 PROPAGATION DELAY (ns) 400 300 200 1LSB=7.8A 100 1LSB=78nA .05 .01 .02 .05 0.1 0.2 0.5 1.0 2.0 5.0 10 0 RELATIVE OUTPUT (dB)
Reference Input Frequency Response
6 4 2 0 -2 -4 -6 -8 -10 -12 -14 0.1 R14=R15=1k RL 500 ALL BITS "ON" VR15 = 0V 0.2 0.5 1.0 2.0 FREQUENCY (MHz) 5.0 10 3 1 2
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 50 connected to Pin 14. +2.0V applied to R14.
August 31, 1994
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Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Reference AMP Common-Mode Range All Bits On
3.2 OUTPUT CURRENT (mA) 2.8 2.4 2.0 1.6 1.2 0.8 0.4 0 -14 -10 -6 -2 0 2 IREF = 1mA IREF = 0.2mA 6 10 14 18 V- = -15V V- = -5V V+ = +5V IREF = 2mA LOGIC INPUT CURRENT ( A) TA = TMIN to TMAX
Logic Input Current vs Input Voltage
8.0
VTH - VLC vs Temperature
2.0 1.8 1.6 1.4 1.2 1.o 0.8 0.6 0.4 0.2 0
4.0
2.0
0 -12
V LC V TH -
(V)
6.0
V15 -- REFERENCE COMMON MODE VOLTAGE (V) POSITIVE COMMON-MODE RANGE IS ALWAYS (V+) -1.5V.
-8 -4 0 4 8 12 LOGIC INPUT VOLTAGE (V)
16
-50
0 50 100 TEMPERATURE (C)
150
Output Voltage Compliance vs Temperature
20 16 OUTPUT CURRENT (mA) OUTPUT VOLTAGE (V) 12 8 4 0 -4 -8 -12 -50 0 50 100 150 TEMPERATURE (C) 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 1.4
Bit Transfer Characteristics
Power Supply Current vs V+
POWER SUPPLY CURRENT (mA)
1.2 IREF = 2.0mA 1.0 0.8 0.6 0.4 0.2 0 -12 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). V- = -15V V- = -5V B3 B4 16 B2 B1
8 7 6 5 4 3 2 1 0
ALL BITS HIGH OR LOW I-
I+
B5 -8 -4 0 4 8 12 LOGIC INPUT VOLTAGE (V)
-50 0 50 100 150 V+ - POSITIVE POWER SUPPLY (VDC)
Maximum Reference Input Frequency vs Compensation Capacitor Value Power Supply Current vs V-
POWER SUPPLY CURRENT (mA) 8 7 6 5 4 3 2 1 0 0 -4.0 -8.0 -12 -16 -20 I- WITH IREF = 0.2mA I+ I- WITH IREF = 1mA
Power Supply Current vs Temperature
10,000 POWER SUPPLY CURRENT (mA)
BITS MAY BE HIGH OR LOW I- WITH IREF = 2mA
8 7 6 5 4 3 2 1 0 -50
BITS MAY BE HIGH OR LOW V- = +15V I- IREF = 2.0mA F (kHz) MAX I+ 150
1,000
V+ = +15V
100
V- -- NEGATIVE POWER SUPPLY (VDC)
0 50 100 TEMPERATURE (C)
10 1 10 CC (pF) 100 1000
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Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
TYPICAL APPLICATION
+VREF OPTIONAL RESISTOR FOR OFFSET INPUTS RIN 0V RP RREF 14 REQ =200 15 16 4 2
is 2mA or less, and at least 8V more positive than the negative supply when the reference current is between 2mA and 4mA. 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 2mA, the negative supply must be at least 8V 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.
NO CAP NOTES: REQ = RIN || RP Typical Values RIN = 5k +VIN = 10V
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 DAC08 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 DAC08 series has a very low full-scale current drift over the operating temperature range. The DAC08 series is guaranteed accurate to within LSB at +25C at a full-scale output current of 1.992mA. The relative accuracy test circuit is shown in Figure 1. The 12-bit converter is calibrated to a full-scale output current of 1.99219mA, then the DAC08 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. 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 DAC08 series.
Pulsed Referenced Operation
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 1. 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 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 5.0k, minimum capacitor values are 15, 37, and 75pF, 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.) 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 3.0V 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. When using a DC reference voltage, capacitive bypass to ground is recommended. The 5.0V 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 0.1F to ground. For reference voltages greater than 5.0V, 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.
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 DAC08 series is monotonic for all values of reference current above 0.5mA. The recommended range for operation is a DC reference current between 0.5mA and 4.0mA.
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 70ns for settling to within LSB for 8-bit accuracy. This time applies when RL<500 and CO<25pF. The slowest single switch is the least significant bit, which typically turns on and settles in 65ns. In applications where the DAC functions in a positive-going ramp mode, the worst-case condition does not occur and settling times less than 70ns 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, 100F supply bypassing for low frequencies, minimum scope lead length, and avoidance of ground loops are all mandatory.
Output Voltage Range
The voltage at Pin 4 must always be at least 4.5V more positive than the voltage of the negative supply (Pin 3) when the reference current
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Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
SETTLING TIME AND PROPAGATION DELAY
VS + = +15V VIN C3 VADJ Q1 D3 R1 = 1000 R14 = 5k VREF = 10V IREF = 2mA 15 16 R15 = 5k C1 3 C2 1 C5 50 D2 14 DUT 2 5 6 7 8 9 10 11 12 4 VOUT D1 C4 R3 = 500 R2 = 1000 VOUT
VS - = -15V
NOTES: D1, D2 = IN6263 or equivalent D3 = IN914 or equivalent C1 = 0.01F C2, C3 = 0.1F Q1 = 2N3904 C4, C5 = 15pF and includes all probe and fixturing capacitance.
BASIC DAC08 CONFIGURATION
MSB 2 +VREF RREF (LOW T.C.) IREF 5 14
34567
LSB
6 7 8 9 10 11 12 4 DAC-08 2 IO IO
15 3 V- CCOMP 0.1F 0.1F 16 13 1
V+
NOTES: ) V REF 255 I [ x ; I )I +I for all logic states FS O O FS 256 R REF
August 31, 1994
725
Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
RECOMMENDED FULL-SCALE AND ZERO-SCALE ADJUST
VREF
R1 R2
14 DAC-08 15 R3
4 2
R4 = 1M
V+ RS = 20k
V-
NOTES: R1 = low T.C. R3 = R1 + R2 R2 0.1 R1 to minimize pot. contribution to full-scale drift
UNIPOLAR VOLTAGE OUTPUT FOR LOW IMPEDANCE OUTPUT
5k (LOW T.C.)
IR = 2mA 14 15 DAC-08
4
2 5k
- NE531 OR EQUIV +
VOUT = 0 TO +10V
August 31, 1994
726
Philips Semiconductors Linear Products
Product specification
8-Bit high-speed multiplying D/A converter
DAC08 Series
UNIPOLAR VOLTAGE OUTPUT FOR HIGH IMPEDANCE OUTPUT
V = 10V
5k
5k VOUT
IR = 2mA 14
4 DAC-08 2 VOUT
a. Positive Output
VOUT
IR = 2mA 14
4 DAC-08 2
a. Negative Output
VOUT
BASIC BIPOLAR OUTPUT OPERATION (OFFSET BINARY)
V = 10V
10k 4 IR = 2mA 14 2 DAC-08 VOUT 10k
VOUT
B1 Positive full-scale Positive FS - 1LSB + Zero-scale + 1LSB Zero-scale Zero-scale - 1LSB Negative full scale - 1LSB Negative full scale 1 1 1 1 0 0 0
B2 1 1 0 0 1 0 0
B3 1 1 0 0 1 0 0
B4 1 1 0 0 1 0 0
B5 1 1 0 0 1 0 0
B6 1 1 0 0 1 0 0
B7 1 1 0 0 1 0 0
B8 1 0 1 0 1 1 0
VOUT -9.920V -9.840V -0.080V 0.000 0.080 +9.920 +10.000
VOUT +10.000 +9.920 +0.160 +0.080 0.000 -9.840 -9.920
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