DAC08

DAC08 PHILIPS | Alldatasheet

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Philips Semiconductors Linear Products Product specification DAC08 Series8-Bit high-speed multiplying D/A converter 716August 31, 1994 853-0045 13721

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.

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

APPLICATIONS

• 8-bit, 1µs A-to-D converters
• Servo-motor and pen drivers PIN CONFIGURATIONS 8 9 F, N Packages 8 9 NOTE: 1. SO and non-standard pinouts. VLC IO IO B 1 (MSB) B 2 B 3 B 4 COMP VREF– VREF+ B 8 (LSB) B 7 B 6 B 5 VREF+ VREF– COMPEN VLC IO IO B 8 (LSB) B 7 B 6 B 5 B 4 B 3 B 2 B 1 (MSB) TOP VIEW TOP VIEW
• 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 in- put/output versatility are required
• Programmable gain and attenuation
• Analog-Digital multiplication

Philips Semiconductors Linear Products Product specification DAC08 Series8-Bit high-speed multiplying D/A converter August 31, 1994 717

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 BIAS NETWORK CURRENT SWITCHES MSB LSB 13 1 5 6 7 8 9 10 11 12 16 3 COMP. V– REFERENCE AMPLIFIER VREF (+) VREF (–) B 1VLC B 2 B 3 B 4 B 5 B 6 B 7 B 8 IOUT IOUT ABSOLUTE MAXIMUM RATINGS SYMBOL PARAMETER RATING UNIT V+ to V- Power supply voltage 36 V V5-V12 Digital input voltage V- to V- plus 36V 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 VEE to VCC PD Maximum power dissipation TA=25°C (still-air)1 F package 1190 mW N package 1450 mW D package 1090 mW TSOLD Lead soldering temperature (10sec max) 300 °C TA Operating temperature range DAC08, DAC08A -55 to +125 °C DAC08C, E, H 0 to +70 °C TSTG Storage temperature range -65 to +150 °C 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

Philips Semiconductors Linear Products Product specification DAC08 Series8-Bit high-speed multiplying D/A converter August 31, 1994 718 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 TEST CONDITIONS DAC08C DAC08E DAC08 UNITSYMBOL PARAMETER TEST CONDITIONS Min Typ Max Min Typ Max UNIT Resolution 8 8 8 8 8 8 Bits Monotonicity 8 8 8 8 8 8 Bits Relative accuracy Over temperature range ±0.39 ±0.19 %FS Differential non-linearity ±0.78 ±0.39 %FS TCIFS Full-scale tempco ±10 ±10 ppm/°C VOC Output voltage complianceFull-scale current change< 1/2LSB-10 +18 -10 +18 V IFSS Full-scale symmetry IFS4 -IFS2 ±2.0 ±16 ±1.0 ±8.0 µA IZS Zero-scale current 0.2 4.0 0.2 2.0 µA IFSR Full-scale output current range R 14, R15=5.000kΩ VREF =+15.0V, V-=-10V VREF =+25.0V, V-=-12V 2.1 4.2 2.1 4.2 mA VIL VIH Logic input levels Low High VLC =0V 2.0 0.8 2.0 0.8 V IIL IIH Logic input current Low High VLC =0V VIN=-10V to +0.8V VIN=2.0V to 18V -2.0 0.002 -10 -2.0 0.002 -10 µA VIS Logic input swing V-=-15V -10 +18 -10 +18 V VTHR Logic threshold range VS=±15V -10 +13.5 -10 +13.5 V I15 Reference bias current -1.0 -3.0 -1.0 -3.0 µA dl/dt Reference input slew rate 4.0 8.0 4.0 8.0 mA/µs Power supply sensitivity IREF =1mA V+=13.5 to 16.5V, V-=-15V %FS/%VS Power supply current Positive Negative VS=±5V, IREF =1.0mA 3.1 -4.3 3.8 -5.8 3.1 -4.3 3.8 -5.8 Positive Negative VS=+5V, -15V, IREF =2.0mA 3.1 -7.1 3.8 -7.8 3.1 -7.1 3.8 -7.8 mA 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 ±5V, IREF =1.0mA 37 48 37 48 PD Power dissipation +5V, -15V, IREF =2.0mA 122 136 122 136 mWD ±15V, IREF =2.0mA 156 174 156 174

Philips Semiconductors Linear Products Product specification DAC08 Series8-Bit high-speed multiplying D/A converter August 31, 1994 719 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 TEST CONDITIONS DAC08H DAC08A UNITSYMBOL PARAMETER TEST CONDITIONS Min Typ Max UNIT Resolution 8 8 8 Bits Monotonicity 8 8 8 Bits Relative accuracy Over temperature range ±0.1 %FS Differential non-linearity ±0.19 %FS TCIFS Full-scale tempco ±10 ±50 ppm/°C VOC Output voltage compliance Full-scale current change 1/2LSB -10 +18 V IFSS Full-scale symmetry IFS4 -IFS2 ±1.0 ±4.0 µA IZS Zero-scale current 0.2 1.0 µA IFSR Full-scale output current range R 14, R15=5.000kΩ VREF =+15.0V, V-=-10V VREF =+25.0V, V-=-12V 2.1 4.2 mA VIL VIH Logic input levels Low High VLC =0V 2.0 0.8 V IIL IIH Logic input current Low High VLC =0V VIN=-10V to +0.8V VIN=2.0V to 18V -2.0 0.002 -10 µA VIS Logic input swing V-=-15V -10 +18 V VTHR Logic threshold range VS=±15V -10 +13.5 V I15 Reference bias current -1.0 -3.0 µA dl/dt Reference input slew rate 4.0 8.0 mA/µs Power supply sensitivity IREF =1mA PSSIFS+ Positive V+=4.5 to 5.5V, V-=-15V; 0.0003 0.01 V+=13.5 to 16.5V, V-=-15V %FS/%VS PSIFS- Negative V-=-4.5 to -5.5V, V+=+15V; 0.002 0.01 Power supply current Positive Negative VS=±5V, IREF =1.0mA 3.1 -4.3 3.8 -5.8 Positive Negative VS=+5V, -15V, IREF =2.0mA 3.1 -7.1 3.8 -7.8 mA Positive Negative VS=±15V, IREF =2.0mA 3.2 -7.2 3.8 -7.8 PD Power dissipation ±5V, IREF =1.0mA 37 48 mWPD Power dissipation +5V, -15V, IREF =2.0mA 122 136 mWD ±15V, IREF =2.0mA 156 174

Philips Semiconductors Linear Products Product specification DAC08 Series8-Bit high-speed multiplying D/A converter August 31, 1994 722 TYPICAL PERFORMANCE CHARACTERISTICS IFS — OUTPUT FULL SCALE CURRENT (mA) 50ns/DIVISIOM R EQ = 200Ω , RL = 100Ω , CC = 0 2.0mA NOTES: Curve 1: CC = 15pF, VIN = 2.0VP-P centered at +1.0V Curve 1: CC = 15pF, VIN = 5m0VP-P centered at +200mV Curve 1: CC = 15pF, VIN = 100m0VP-P centered at 0V and applied through 50Ω connected to Pin 14. +2.0V applied to R14. Output Current vs Output Voltage (Output Voltage Compliance) Fast Pulsed Reference Operation True and Complementary Output Operation Full-Scale Settling Time LSB Switching Full-Scale Current vs Reference Current LSB Propagation Delay vs IFS Reference Input Frequency Response IREF — REFERENCE CURRENT (mA) 5.0 4.0 3.0 2.0 1.0 I – OUTPUT CURRENT (mA)FS TA = Tmin TO Tmax ALL BITS “HIGH” LIMIT FOR V–=–15V LIMIT FOR V–=–5V (00000000) (11111111) 0mA 1.0mA IOUT IOUT 3.2 2.8 2.4 2.0 1.6 1.2 0.8 0.4 OUTPUT CURRENT (mA) OUTPUT VOLTAGE (V) ALL BITS ON –14 –10 –6 –2 0 2 6 10 14 18 2.5V 0.5V –0.5mA –2.5mA VIN IOUT 200ns/division BIT 8 LOGIC INPUT IOUT 8µA 2.4V 0.4V ALL BITS SWITCHED ON OUTPUT – 1/2LSB SETTLING +1/2LSB 2.4V 0.4V 50ns/DIVISIOM IFS =2mA, R L=1kΩ 1/2LSB=4µA 500 400 300 200 100 .05 .01 .02 .05 0.1 0.2 0.5 1.0 2.0 5.0 PROPAGATION DELA Y (ns) 1LSB=78nA 1LSB=7.8µA RELATIVE OUTPUT (dB) FREQUENCY (MHz) –10 –12 –14 R14=R15=1k Ω R L ≤ 500Ω ALL BITS “ON” VR15 = 0V IREF = 0.2mA IREF = 1mA IREF = 2mAV– = –15V V– = –5V TA = Tmin TO Tmax

Philips Semiconductors Linear Products Product specification DAC08 Series8-Bit high-speed multiplying D/A converter August 31, 1994 723 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) OUTPUT CURRENT (mA) LOGIC INPUT VOLTAGE (V) LOGIC INPUT CURRENT ( A)µ 10,000 POWER SUPPL Y CURRENT (mA) POWER SUPPL Y CURRENT (mA) NOTES: B1 through B8 have identical transfer characteristics. Bits are fully switched, with less than 1/2LSB error, at less than ±100mV from actual threshold. These switching points are guaranteed to lie between 0.8 and 2.0V over the operating temperature range (VLC = 0.0V). Reference AMP Common-Mode Range All Bits On Logic Input Current vs Input Voltage VTH – VLC vs Temperature Output Voltage Compliance vs Temperature Bit Transfer Characteristics Power Supply Current vs V+ Power Supply Current vs V– Power Supply Current vs Temperature Maximum Reference Input Frequency vs Compensation Capacitor Value 2.0 1.8 1.6 1.4 1.2 1.o 0.8 0.6 0.4 0.2 –50 0 50 100 150 V – V (V)TH LC TEMPERATURE ( °C) V– — NEGATIVE POWER SUPPLY (V DC ) BITS MAY BE HIGH OR LOW I– WITH IREF = 2mA I– WITH IREF = 1mA I– WITH IREF = 0.2mA –50 0 50 100 150 TEMPERATURE ( °C) BITS MAY BE HIGH OR LOW IREF = 2.0mA V+ = +15V V– = +15V 1,000 100 1 10 100 1000 C C (pF) F (kHz)MAX 8.0 6.0 4.0 2.0 –12 –8 –4 0 4 8 12 16 LOGIC INPUT VOLTAGE (V) 1.420 3.2 2.8 2.4 2.0 1.6 1.2 0.8 0.4 –14 –10 –6 –2 0 2 6 10 14 18 V15 — REFERENCE COMMON MODE VOLTAGE (V) POSITIVE COMMON-MODE RANGE IS ALWAYS (V+) –1.5V. IREF = 2mA TA = TMIN to TMAX IREF = 1mA IREF = 0.2mA POWER SUPPL Y CURRENT (mA) –50 0 50 100 150 V+ – POSITIVE POWER SUPPLY (V DC ) ALL BITS HIGH OR LOW 1.2 1.0 0.8 0.6 0.4 0.2 –12 –8 –4 0 4 8 12 16 OUTPUT CURRENT (mA) IREF = 2.0mA B1 V– = –15V V– = –5V Shaded area indicates permissible output voltage range for V– = -15V, IREF ≤ 2.0mA For other V– or IREF See “Output Current vs Output Voltage” curve on previous page TEMPERATURE ( °C) –12 –50 0 50 100 150 OUTPUT VOL TAGE (V)

Philips Semiconductors Linear Products Product specification DAC08 Series8-Bit high-speed multiplying D/A converter August 31, 1994 724 TYPICAL APPLICATION NOTES: REQ = R IN || RP Typical Values R IN = 5kΩ +V IN = 10V Pulsed Referenced Operation OPTIONAL RESISTOR FOR OFFSET INPUTS NO CAP 15 16 2 +V REF R REF REQ =200ΩR P R IN 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. R 15 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 R 14 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.) 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 0.1µF 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. 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 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. 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 +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. 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. 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<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. 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.

Philips Semiconductors Linear Products Product specification DAC08 Series8-Bit high-speed multiplying D/A converter August 31, 1994 725 SETTLING TIME AND PROPAGATION DELAY NOTES: D 1, D2 = IN6263 or equivalent D 3 = IN914 or equivalent C 1 = 0.01µF C 2, C3 = 0.1µF Q 1 = 2N3904 C 4, C5 = 15pF and includes all probe and fixturing capacitance. VIN VS + = +15V VADJ VOUT VS – = –15V R 15 = 5kΩ IREF = 2mA VREF = 10V R 14 = 5kΩ VOUT R 1 = 1000Ω R 2 = 1000Ω R 3 = 500Ω 50ΩC 1 C 2 C 5 C 3 D 3 D 1 D 2 C 4 DUT 16 3 1 12111098765 Q 1 BASIC DAC08 CONFIGURATION NOTES: IFS V REF R REF x 255 256 ; IO IO IFS for all logic states MSB 2 3 4 5 6 7 LSB 5 6 7 8 9 10 11 12 3 16 13 1 DAC-08 (LOW T.C.) V+V– IO IO +V REF IREFR REF C COMP 0.1µF 0.1µF

Philips Semiconductors Linear Products Product specification DAC08 Series8-Bit high-speed multiplying D/A converter August 31, 1994 726 RECOMMENDED FULL-SCALE AND ZERO-SCALE ADJUST NOTES: R 1 = low T.C. R 3 = R1 + R2 R 2 ≈ 0.1 R1 to minimize pot. contribution to full-scale drift 15 2 DAC-08 VREF V+ V– R 4 = 1MΩ R S = 20kΩ R 3 R 2 R 1 UNIPOLAR VOLTAGE OUTPUT FOR LOW IMPEDANCE OUTPUT VOUT =14 DAC-08 NE531 OR EQUIV 0 TO +10V IR = 2mA 4 5kΩ 5kΩ (LOW T.C.)

Philips Semiconductors Linear Products Product specification DAC08 Series8-Bit high-speed multiplying D/A converter August 31, 1994 727 UNIPOLAR VOLTAGE OUTPUT FOR HIGH IMPEDANCE OUTPUT 14 2 DAC-08IR = 2mA VOUT VOUT 5kΩ 5kΩ V = 10V 14 2 DAC-08IR = 2mA VOUT VOUT a. Positive Output a. Negative Output BASIC BIPOLAR OUTPUT OPERATION (OFFSET BINARY) Positive full-scale Positive FS – 1LSB + Zero-scale + 1LSB Zero-scale Zero-scale – 1LSB Negative full scale – 1LSB Negative full scale –9.920V –9.840V –0.080V 0.000 0.080 +9.920 +10.000 +10.000 +9.920 +0.160 +0.080 0.000 –9.840 –9.920 B 1 B 2 B 3 B 4 B 5 B 6 B 7 B 8 VOUT VOUT DAC-08IR = 2mA VOUT VOUT 10kΩ V = 10V 10kΩ