Philips Semiconductors Linear Products Product specification 8-Bit high-speed multiplying D/A converter DESCRIPTION DAC08 Series PIN CONFIGURATIONS 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. F, N Packages VLC 1 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. 16 COMP 2 15 VREF– V– 3 14 V REF+ IO 4 13 V+ IO 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 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. V+ 1 15 B7 3 14 B6 COMPEN 4 13 B5 VLC 5 12 B4 VREF– The compact size and low power consumption make the DAC08 attractive for portable and military aerospace applications. 6 11 B3 V– 7 10 B2 IO 8 9 IO FEATURES • 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 16 B8 (LSB) VREF+ 2 B1 (MSB) TOP VIEW NOTE: 1. SO and non-standard pinouts. • 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 APPLICATIONS • 8-bit, 1µs A-to-D converters • Servo-motor and pen drivers August 31, 1994 716 853-0045 13721 Philips Semiconductors Linear Products Product specification 8-Bit high-speed multiplying D/A converter DAC08 Series ORDERING INFORMATION DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG # 16-Pin Hermetic Ceramic Dual In-Line Package (Cerdip) -55°C to +125°C DAC08F 0582B 16-Pin Hermetic Ceramic Dual In-Line Package (Cerdip) -55°C to +125°C DAC08AF 0582B 16-Pin Plastic Dual In-Line Package (DIP) 0 to +70°C DAC08CN 0406C 16-Pin Hermetic Ceramic Dual In-Line Package (Cerdip) 0 to +70°C DAC08CF 0582B 16-Pin Plastic Dual In-Line Package (DIP) 0 to +70°C DAC08EN 0406C 16-Pin Hermetic Ceramic Dual In-Line Package (Cerdip) 0 to +70°C DAC08EF 0582B 16-Pin Plastic Small Outline (SO) Package 0 to +70°C DAC08ED 0005D 16-Pin Plastic Dual In-Line Package (DIP) 0 to +70°C DAC08HN 0406C BLOCK DIAGRAM V+ MSB B1 VLC 13 1 5 B2 6 B3 7 B4 8 B5 9 B6 10 LSB B8 B7 11 12 4 BIAS NETWORK CURRENT SWITCHES 14 VREF(+) VREF(–) 2 IOUT IOUT + – 15 REFERENCE AMPLIFIER 16 COMP. 3 V– 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 TA=25°C (still-air)1 V- to V- plus 36V VEE to VCC F package 1190 mW N package 1450 mW D package 1090 mW 300 °C -55 to +125 °C 0 to +70 °C -65 to +150 °C TSOLD Lead soldering temperature (10sec max) TA Operating temperature range DAC08, DAC08A DAC08C, E, H TSTG Storage temperature range NOTES: 1. Derate above 25°C, at the following rates: F package at 9.5mW/°C N package at 11.6mW/°C D package at 8.7mW/°C August 31, 1994 717 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=0°C to 70°C DAC08/08A: TA=-55°C to 125°C SYMBOL PARAMETER DAC08E DAC08 DAC08C TEST CONDITIONS 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 ±10 TCIFS Full-scale tempco VOC Output voltage compliance Full-scale current change< 1/2LSB -10 IFS4 Full-scale current VREF=10.000V, R14, R15=5.000kΩ 1.94 IFSS Full-scale symmetry IZS Zero-scale current IFSR Full-scale output current range IFS4-IFS2 R14, R15=5.000kΩ VREF=+15.0V, V-=-10V VREF=+25.0V, V-=-12V 2.1 4.2 2.0 VIL VIH Logic input levels Low High VLC=0V IIL IIH Logic input current Low High VLC=0V VIN=-10V to +0.8V VIN=2.0V to 18V VIS Logic input swing V-=-15V -10 VTHR Logic threshold range VS=±15V -10 I15 Reference bias current dl/dt Reference input slew rate Power supply sensitivity ±10 +18 -10 1.99 2.04 1.94 ±2.0 0.2 V 1.99 2.04 mA ±16 ±1.0 ±8.0 µA 4.0 0.2 2.0 µA 2.1 4.2 mA 0.8 0.8 V -10 10 µA +18 V 2.0 -2.0 0.002 -1.0 4.0 ppm/°C +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=1mA PSSIFS+ Positive V+=4.5 to 5.5V, V-=-15V; 0.0003 0.01 0.0003 0.01 PSIFS- Negative V-=-4.5 to -5.5V, V+=+15V; 0.002 0.01 0.002 0.01 VS=±5V, IREF=1.0mA 3.1 -4.3 3.8 -5.8 3.1 -4.3 3.8 -5.8 V+=13.5 to 16.5V, V-=-15V %FS/%VS V-=-13.5 to -16.5, V+=+15V I+ I- Power supply current Positive Negative I+ I- Positive Negative VS=+5V, -15V, IREF=2.0mA 3.1 -7.1 3.8 -7.8 3.1 -7.1 3.8 -7.8 I+ I- Positive Negative VS=±15V, IREF=2.0mA 3.2 -7.2 3.8 -7.8 3.2 -7.2 3.8 -7.8 PD Power dissipation August 31, 1994 ±5V, IREF=1.0mA 37 48 37 48 +5V, -15V, IREF=2.0mA 122 136 122 136 ±15V, IREF=2.0mA 156 174 156 174 718 mA mW 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 = 0°C to 70°C. DAC08/08A: TA = -55°C to 125°C. SYMBOL PARAMETER DAC08H DAC08A TEST CONDITIONS Typ Max Resolution 8 8 8 Monotonicity 8 8 8 Bits ±0.1 %FS Relative accuracy Over temperature range Full-scale tempco VOC Output voltage compliance Full-scale current change 1/2LSB -10 IFS4 Full-scale current VREF=10.000V, R14, R15=5.000kΩ 1.984 IFSS Full-scale symmetry IZS Zero-scale current Full-scale output current range IFS4-IFS2 R14, R15=5.000kΩ VREF=+15.0V, V-=-10V VREF=+25.0V, V-=-12V 2.1 4.2 2.0 VIL VIH Logic input levels Low High VLC=0V IIL IIH Logic input current Low High VLC=0V VIN=-10V to +0.8V VIN=2.0V to 18V VIS Logic input swing V-=-15V VTHR Logic threshold range VS=±15V I15 Reference bias current dl/dt Reference input slew rate Power supply sensitivity PSSIFS+ Positive ±0.19 %FS ±50 ppm/°C +18 V 1.992 2.000 mA ±1.0 ±4.0 µA 0.2 1.0 µA mA 0.8 V -10 10 µA -10 +18 V -10 +13.5 V -3.0 µA -2.0 0.002 -1.0 4.0 8.0 mA/µs IREF=1mA V+=4.5 to 5.5V, V-=-15V; 0.0003 0.01 0.002 0.01 3.1 -4.3 3.8 -5.8 V+=13.5 to 16.5V, V-=-15V PSIFS- Negative Bits ±10 Differential non-linearity TCIFS IFSR UNIT Min V-=-4.5 to -5.5V, V+=+15V; %FS/%VS V-=-13.5 to -16.5, V+=+15V I+ I- Power supply current Positive Negative VS=±5V, IREF=1.0mA I+ I- Positive Negative VS=+5V, -15V, IREF=2.0mA 3.1 -7.1 3.8 -7.8 I+ I- Positive Negative VS=±15V, IREF=2.0mA 3.2 -7.2 3.8 -7.8 PD Power dissipation August 31, 1994 ±5V, IREF=1.0mA 37 48 +5V, -15V, IREF=2.0mA 122 136 ±15V, IREF=2.0mA 156 174 719 mA mW Philips Semiconductors Linear Products Product specification 8-Bit high-speed multiplying D/A converter DAC08 Series AC ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER Min tS To ± 1/2LSB, all bits switched on or off, TA=25°C Settling time DAC08E DAC08 DAC08C TEST CONDITIONS Typ Max 70 35 Min DAC08H DAC08A Typ Max 135 70 60 35 Min UNIT Typ Max 135 70 135 60 35 60 ns Propagation delay tPLH Low-to-High TA=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% Figure 1. Relative Accuracy Test Circuit 0.1µF VCC 2.4V eIN 13 +2.0VDC 5 6 7 8 9 10 11 12 eIN DAC-08 51 0.1µF 14 15 1 2 4 16 tPHL = tPLH = 10ns 1.0k 1.0k 15pF 1.0V RL SETTLING TIME 0.1µF FOR SETTLING TIME MEASUREMENT eO (ALL BITS SWITCHED LOW TO HIGH) CO ≤ 25pF 0 tS = 70ns TYPICAL TO ±1/2 LSB TRANSIENT 0 RESPONSE -100mV 3 RL = 50Ω PIN 4 TO GND tPLH Figure 2. Transient Response and Settling Time 720 USE RL to GND FOR TURN OFF MEASUREMENT RL = 500Ω VEE August 31, 1994 1.4V 0.4V tPHL Philips Semiconductors Linear Products Product specification 8-Bit high-speed multiplying D/A converter DAC08 Series TEST CIRCUITS (Continued) VCC 2V RIN 13 1k 5 REQ = 200Ω 6 14 7 15 8 0 VIN RP 1 DAC-08 9 2 10 4 11 16 OPEN 12 10% RL 0.1µF 3 dI I dV R L dt dt SCOPE 2.0mA SLEWING TIME VEE Figure 3. Reference Current Slew Rate Measurement VCC ICC 13 I14 5 A1 A2 A3 A4 A5 DIGITAL INPUTS A6 A7 VREF (+) 6 7 15 8 1 DAC-08 9 I15 R15 2 10 VO OUTPUT 4 11 12 16 A8 (+) R14 14 II VI IO C 3 RL IEE NOTES: (See text for values of C.) VEE Typical values of R14 = R15 = 1k VREF = +2.0V C = 15pF 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 where K A2 4 A3 8 A4 16 A5 32 A6 64 A8 A7 128 256 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 721 0 90% 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) 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 –2.5mA IOUT 2.0mA 0.8 IREF = 0.2mA 0.4 (00000000) 0 –14 –10 –6 –2 0 2 6 10 OUTPUT VOLTAGE (V) 14 REQ = 200Ω, RL = 100Ω, CC = 0 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” 4.0 3.0 LIMIT FOR V–=–5V 2.0 1.0 0 LSB Propagation Delay vs IFS Reference Input Frequency Response 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 .05 .01 1LSB=78nA 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: August 31, 1994 LIMIT FOR V–=–15V 0 500 0 (11111111) 200ns/division 18 Full-Scale Settling Time PROPAGATION DELAY (ns) IOUT 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. 722 1.0 2.0 3.0 4.0 5.0 IREF — REFERENCE CURRENT (mA) Philips Semiconductors Linear Products Product specification 8-Bit high-speed multiplying D/A converter DAC08 Series TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 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 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. 20 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 V– = –15V V– = –5V –8 0 –12 –12 –50 0 50 100 150 TEMPERATURE (°C) B1 0.8 0.2 B3 B4 B5 –8 –4 0 4 8 12 LOGIC INPUT VOLTAGE (V) 0 50 100 TEMPERATURE (°C) 150 Power Supply Current vs V+ 1.0 0.6 –50 16 Bit Transfer Characteristics 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 8.0 (V) TA = TMIN to TMAX LOGIC INPUT CURRENT ( µ A) OUTPUT CURRENT (mA) 3.2 2.8 VTH – VLC vs Temperature Logic Input Current vs Input Voltage VTHLC– V Reference AMP Common-Mode Range All Bits On 8 7 ALL BITS HIGH OR LOW I– 6 5 4 3 I+ 2 1 0 –50 0 50 100 150 V+ – POSITIVE POWER SUPPLY (VDC) 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). Maximum Reference Input Frequency vs Compensation Capacitor Value Power Supply Current vs V– Power Supply Current vs Temperature 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 6 F (kHz) MAX 8 POWER SUPPLY CURRENT (mA) POWER SUPPLY CURRENT (mA) 10,000 IREF = 2.0mA 5 4 3 V+ = +15V I+ 1,000 100 2 1 0 –50 0 50 100 TEMPERATURE (°C) 150 10 1 100 10 CC (pF) August 31, 1994 723 1000 Philips Semiconductors Linear Products Product specification 8-Bit high-speed multiplying D/A converter 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. TYPICAL APPLICATION +VREF OPTIONAL RESISTOR FOR OFFSET INPUTS RIN 0V RP Output Current Range RREF 14 REQ =200Ω 15 16 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. 4 2 NO CAP Accuracy NOTES: REQ = RIN || RP Typical Values 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. RIN = 5kΩ +VIN = 10V 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. The DAC08 series is guaranteed accurate to within ± LSB at +25°C 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. 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 5.0kΩ, 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.) 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. 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. 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. Settling Time 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 0.1µF to ground. For reference voltages greater than 5.0V, a clamp diode is recommended between Pin 14 and ground. 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<500Ω 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. 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, 100µF 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 August 31, 1994 DAC08 Series 724 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 = 1000Ω 5 R14 = 5kΩ VOUT 6 7 8 9 10 11 12 14 VREF = 10V R2 = 1000Ω 4 VOUT DUT IREF = 2mA 2 15 16 3 C1 R15 = 5kΩ D1 1 D2 50Ω C5 C2 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. BASIC DAC08 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 V– 13 1 V+ CCOMP 0.1µF 0.1µF 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 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 UNIPOLAR VOLTAGE OUTPUT FOR LOW IMPEDANCE OUTPUT 5kΩ (LOW T.C.) IR = 2mA – NE531 OR EQUIV + 4 14 15 DAC-08 2 5kΩ August 31, 1994 726 VOUT = 0 TO +10V 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 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 BASIC BIPOLAR OUTPUT OPERATION (OFFSET BINARY) V = 10V 10kΩ 10kΩ 4 IR = 2mA DAC-08 14 VOUT 2 VOUT August 31, 1994 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 –9.920 727

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