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DAC-08 SERIES 8-Bit High-Speed Multiplying D/A Converter
The DAC-08 series of 8-bit monolithic multiplying Digital-toAnalog Converters provide very high-speed performance coupled with low cost and outstanding applications flexibility. 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. Dual complementary outputs are provided, increasing versatility and enabling differential operation to effectively double the peak-topeak output swing. True high voltage compliance outputs allow direct output voltage conversion and eliminate output op amps in many applications. 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 "5.0 V supplies. The compact size and low power consumption make the DAC-08 attractive for portable and military aerospace applications.
Features
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16 1
SOIC-16 D SUFFIX CASE 751B
16 1
PDIP-16 N SUFFIX CASE 648
PIN CONNECTIONS
N Package
VLC 1 IO 2 V- 3 IO 4 B1 (MSB) 5 B2 6 B3 7 B4 8 16 COMPEN 15 VREF- 14 V REF+ 13 V+ 12 B8 (LSB) 11 B7 10 B6 9 B5
* * * * * * * * * * * * * * * * * * * * * *
Fast Settling Output Current - 70 ns Full-Scale Current Prematched to "1.0 LSB Direct Interface to TTL, CMOS, ECL, HTL, PMOS Relative Accuracy to 0.1% Maximum Overtemperature 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 "5.0 V Pb-Free Packages are Available* 8-Bit, 1.0 ms 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
(Top View) D Package*
V+ 1 VREF+ 2 VREF- 3 COMPEN 4 VLC 5 IO 6 V- 7 IO 8 16 B8 (LSB) 15 B7 14 B6 13 B5 12 B4 11 B3 10 B2 9 B1 (MSB)
Applications
(Top View) *SO and non-standard pinouts.
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 13 of this data sheet.
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
(c) Semiconductor Components Industries, LLC, 2005
DEVICE MARKING INFORMATION
See general marking information in the device marking section on page 13 of this data sheet.
1
October, 2005 - Rev. 1
Publication Order Number: DAC-08/D
DAC-08 SERIES
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-
Figure 1. Block Diagram
PIN FUNCTION DESCRIPTION
Pin # N Package / D Package 1/5 2/6 3/7 4/8 5/9 6/10 7/11 8/12 9/13 10/14 11/15 12/16 13/1 14/2 15/3 16/4 Symbol VLC IO V- IO B1 B2 B3 B4 B5 B6 B7 B8 V+ VREF+ VREF- COMPEN Logic Control Voltage Inverted Output Current Negative Power Supply Non-Inverted Output Current Output 1, Most Significant Bit (MSB) Output 2 Output 3 Output 4 Output 5 Output 6 Output 7 Output 8, Least Significant Bit (LSB) Positive Power Supply Positive Reference Voltage Negative Reference Voltage Compensator Capacitor Pin Description
MAXIMUM RATINGS
Rating Power Supply Voltage Digital Input Voltage Logic Threshold Control Applied Output Voltage Reference Current Reference Amplifier Inputs Maximum Power Dissipation Tamb = 25C (Still-Air) (Note 1) Thermal Resistance, Junction-to-Ambient N Package D Package Lead Soldering Temperature (10 sec max) Operating Temperature Range Operating Junction Temperature N Package D Package RqJA Symbol V+ to V- V5-V12 VLC V0 I14 V14, V15 PD 1450 1090 C/W 75 105 230 0 to +70 150 C C C Value 36 V- to V- plus 36 V V- to V+ V- to +18 5.0 VEE to VCC Unit V - - V mA - mW
TSOLD Tamb TJ
Storage Temperature Range Tstg -65 to +150 C Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. Derate above 25C, at the following rates: N package at 13.3 mW/C D package at 9.5 mW/C.
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DAC-08 SERIES
DC ELECTRICAL CHARACTERISTICS Pin 3 must be at least 3.0 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 = 0C to 70C.
DAC-08C Characteristic Resolution Monotonicity Relative Accuracy Differential Non-Linearity Full-Scale Tempco Output Voltage Compliance Full-Scale Current Full-Scale Symmetry Zero-Scale Current Full-Scale Output Current Range TCIFS VOC IFS4 IFSS IZS IFSR - Full-Scale Current Change < 1/2LSB VREF = 10.000 V; R14, R15 = 5.000 kW IFS4-IFS2 - R14, R15 = 5.000 kW VREF = +15 V, V- = -10 V VREF = +25 V, V- = -12 V 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 Positive VLC = 0 V VIL VIH IIL IIH VIS VTHR I15 dl/dt PSSIFS+ VLC = 0 V VIN = -10 V to +0.8 V VIN = 2.0 V to 18 V V- = -15 V VS = "15 V - - IREF = 1.0 mA V+ = 4.5 to 5.5 V, V- = -15 V; V+ = 13.5 to 16.5 V, V- = -15 V V- = -4.5 to -5.5 V, V+ = +15 V; V- = -13.5 to -16.5 V, V+ = +15 V VS = "5.0 V, IREF = 1.0 mA VS = +5.0 V, -15 V, IREF = 2.0 mA VS = "15 V, IREF = 2.0 mA "5.0 V, IREF = 1.0 mA +5.0 V, -15 V, IREF = 2.0 mA "15 V, IREF = 2.0 mA - 2.0 - - -10 -10 - 4.0 - - - -2.0 0.002 - - -1.0 8.0 0.0003 0.8 - -10 10 +18 +13.5 -3.0 - 0.01 - 2.0 - - -10 -10 - 4.0 - - - -2.0 0.002 - - -1.0 8.0 0.0003 0.8 - mA -10 10 +18 +13.5 -3.0 - 0.01 V V mA mA/ms %FS/ %VS %FS/ %VS 2.1 4.2 - - - - 2.1 4.2 - - - - mA mA V - Overtemperature Range Symbol - Test Conditions - Min 8.0 8.0 - - - -10 1.94 - - Typ 8.0 8.0 - - "10 - 1.99 "2.0 0.2 Max 8.0 8.0 "0.39 "0.78 - +18 2.04 "16 4.0 Min 8.0 8.0 - - - -10 1.94 - - DAC-08E Typ 8.0 8.0 - - "10 - 1.99 "1.0 0.2 Max 8.0 8.0 "0.19 "0.39 - +18 2.04 "8.0 2.0 ppm/C V mA mA mA %FS Unit Bits
Negative
PSSIFS-
-
0.002
0.01
-
0.002
0.01
Power Supply Current Positive Negative Positive Negative Positive Negative Power Dissipation
mA I+ I- I+ I- I+ I- PD - - - - - - - - - 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
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DAC-08 SERIES
DC ELECTRICAL CHARACTERISTICS (continued) Pin 3 must be at least 3.0 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 = 0C to 70C.
DAC-08H Characteristic Resolution Monotonicity Relative Accuracy Differential Non-Linearity Full-Scale Tempco Output Voltage Compliance Full-Scale Current Full-Scale Symmetry Zero-Scale Current Full-Scale Output Current Range Symbol - - TCIFS VOC IFS4 IFSS IZS IFSR Test Conditions - Overtemperature Range - Full-Scale Current Change 1/2LSB VREF = 10.000 V, R14, R15 = 5.000 kW IFS4-IFS2 - R14, R15 = 5.000 kW VREF = +15 V, V- = -10 V VREF = +25 V, V-=-12 V VLC = 0 V VIL VIH IIL IIH VIS VTHR I15 dl/dt VLC = 0 V VIN = -10 V to +0.8 V VIN = 2.0 V to 18 V V- = -15 V VS = "15 V - - IREF = 1.0 mA PSSIFS+ PSSIFS- V+ = 4.5 to 5.5 V, V- = -15 V; V+ = 13.5 to 16.5 V, V- = -15 V 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 mA I+ I- I+ I- I+ I- PD VS = "5.0 V, IREF = 1.0 mA VS = +5.0 V, -15 V, IREF = 2.0 mA VS = "15 V, IREF = 2.0 mA "5.0 V, IREF = 1.0 mA +5.0 V, -15 V, IREF = 2.0 mA "15 V, IREF = 2.0 mA - - - - - - - - - 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 - 2.0 - - -10 -10 - 4.0 - - -2.0 0.002 - - -1.0 8.0 0.8 - mA -10 10 +18 +13.5 -3.0 - V V mA mA/ms Min 8.0 8.0 - - - -10 1.984 - - 2.1 4.2 Typ 8.0 8.0 - - "10 - 1.992 "1.0 0.2 - - Max 8.0 8.0 "0.1 "0.19 "50 +18 2.000 "4.0 1.0 - - Unit Bits %FS %FS ppm/C V mA mA mA mA mA V
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 Positive Negative Power Supply Current Positive Negative Positive Negative Positive Negative Power Dissipation
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DAC-08 SERIES
AC ELECTRICAL CHARACTERISTICS
DAC-08C Characteristic Settling Time Symbol tS Test Conditions To "1/2LSB, All Bits Switched On or Off, Tamb = 25C Tamb = 25C, Each Bit All Bits Switched Min - Typ 70 Max 135 DAC-08E Min - Typ 70 Max 135 DAC-08H Min - Typ 70 Max 135 Unit ns
Propagation Delay Low-to-High High-to-Low
ns tPLH tPHL
-
35
60
-
35
60
-
35
60
TEST CIRCUITS
V- V+
VREF
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 2. Relative Accuracy Test Circuit
0.1 mF
VCC 2.4 V 13 eIN +2.0 VDC 14 15 1 2 4 16 1.0 kW 0.1 mF FOR SETTLING TIME MEASUREMENT eO (ALL BITS SWITCHED LOW TO HIGH) 0.4 V tPHL = tPLH = 10 ns 1.0 V SETTLING TIME RL = 500 W 0 tS = 70 ns TYPICAL TO 1/2 LSB TRANSIENT 0 RESPONSE -100 mV tPLH RL = 50 W PIN 4 TO GND tPHL RL USE RL to GND FOR TURN OFF MEASUREMENT 1.4 V
5 6 7 8 9 10 11 12 51 W
DAC-08
1.0 kW
eIN
0.1 mF
15 pF 3 VEE
CO 25 pF
Figure 3. Transient Response and Settling Time
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DAC-08 SERIES
TEST CIRCUITS
VCC RIN 13 5 6 7 8 9 10 11 12 0.1 mF RL SCOPE dI I dV + dt R L dt DAC-08 14 15 1 2 4 16 OPEN 10% 90% 2.0 mA SLEWING TIME VEE 0 REQ = 200 W 1 kW RP VIN 2V 0
3
Figure 4. Reference Current Slew Rate Measurement
VCC ICC 13 I14 A1 A2 A3 DIGITAL INPUTS A4 A5 A6 A7 A8 (+) VI IEE VEE 5 6 7 8 9 10 11 12 II 3 4 16 IO RL C DAC-08 15 1 2 VO OUTPUT I15 R15 14 R14 VREF (+)
NOTES: (See text for values of C.) Typical values of R14 = R15 = 1 kW VREF = +2.0 V
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 +K A1 2 ) A2 4 ) A3 8 ) A4 16 ) A5 32 ) A6 64 ) A7 A8 ) 128 256
O
where K [
V REF R 14
and AN = `1' if AN is at High Level AN = `0' if AN is at Low Level
Figure 5. Notation Definitions
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DAC-08 SERIES
TYPICAL PERFORMANCE CHARACTERISTICS
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 -6 -2 0 2 IREF = 0.2mA 6 10 14 18 200ns/division REQ = 200W, RL = 100W, CC = 0 (00000000) (11111111) IREF = 1mA IOUT -2.5mA 2.0mA IOUT V- = -5V IREF = 2mA VIN 0.5V -0.5mA 1.0mA 0mA IOUT TA = Tmin TO Tmax 2.5V
OUTPUT VOLTAGE (V)
Figure 6. Output Current vs. Output Voltage (Output Voltage Compliance)
Figure 7. Fast Pulsed Reference Operation
Figure 8. True and Complementary Output Operation
I FS - OUTPUT CURRENT (mA)
5.0 4.0 3.0 2.0 1.0 0 0 TA = Tmin TO Tmax ALL BITS "HIGH"
ALL BITS SWITCHED ON 2.4V 0.4V OUTPUT - 1/2LSB 0 SETTLING +1/2LSB BIT 8 2.4V LOGIC INPUT 0.4V 0V 8mA IOUT 50ns/DIVISIOM IFS=2mA, RL=1kW 1/2LSB=4mA 0
LIMIT FOR V-=-15V
LIMIT FOR V-=-5V
50ns/DIVISIOM
1.0 2.0 3.0 4.0 5.0 IREF - REFERENCE CURRENT (mA)
Figure 9. Full-Scale Settling Time
Figure 10. LSB Switching
Figure 11. Full-Scale Current vs. Reference Current
500 PROPAGATION DELAY (ns) 6 400 RELATIVE OUTPUT (dB) 300 200 1LSB=7.8mA 100 1LSB=78nA .05 .01 .02 .05 0.1 0.2 0.5 1.0 2.0 5.0 10 0 4 2 0 -2 -4 -6 -8 -10 -12 -14 0.1 R14=R15=1kW RL 500W 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)
Figure 12. LSB Propagation Delay vs. IFS
Figure 13. Reference Input Frequency Response
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 50W connected to Pin 14. +2.0V applied to R14.
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DAC-08 SERIES
TYPICAL PERFORMANCE CHARACTERISTICS
3.2 OUTPUT CURRENT (mA) LOGIC INPUT CURRENT ( A) 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 TA = TMIN to TMAX 8.0 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
V15 - REFERENCE COMMON MODE VOLTAGE (V) POSITIVE COMMON-MODE RANGE IS ALWAYS (V+) -1.5V.
0 -12
V LC V TH -
(V)
6.0
-8 -4 0 4 8 12 LOGIC INPUT VOLTAGE (V)
16
-50
0 50 100 TEMPERATURE (C)
150
Figure 14. Reference AMP Common-Mode Range All Bits On
Figure 15. Logic Input Current vs. Input Voltage
Figure 16. VTH-VLC vs. Temperature
20 1.4 16 OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) 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 IREF = 2.0mA 1.0 0.8 0.6 0.4 0.2 0 -12 V- = -15V V- = -5V B3 B4 16 B2 B1 POWER SUPPLY CURRENT (mA) 1.2 8 7 6 5 4 3 2 1 0 -50 0 50 100 150 V+ - POSITIVE POWER SUPPLY (VDC) I+
ALL BITS HIGH OR LOW I-
B5 -8 -4 0 4 8 12 LOGIC INPUT VOLTAGE (V)
Figure 17. Output Voltage Compliance vs. Temperature
NOTES:
Figure 18. Bit Transfer Characteristics
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). 10,000
Figure 19. Power Supply Current vs. V+
POWER SUPPLY CURRENT (mA)
8 7 6 5 4 3 2 1 0 0
POWER SUPPLY CURRENT (mA)
6 5 4 3 2 1 0 -50 0 50 100 TEMPERATURE (C) 150 V+ = +15V I+ IREF = 2.0mA
I- WITH IREF = 1mA I- WITH IREF = 0.2mA I+
F (kHz) MAX
BITS MAY BE HIGH OR LOW I- WITH IREF = 2mA
8 7
BITS MAY BE HIGH OR LOW V- = +15V I-
1,000
100
-4.0
-8.0
-12
-16
-20
10 1 10 CC (pF) 100 1000
V- - NEGATIVE POWER SUPPLY (VDC)
Figure 20. Power Supply Current vs. V-
Figure 21. Power Supply Current vs. Temperature
Figure 22. Maximum Reference Input Frequency vs. Compensation Capacitor Value
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DAC-08 SERIES
+VREF OPTIONAL RESISTOR FOR OFFSET INPUTS RIN 0V NOTES: REQ = RIN || RP Typical Values RIN = 5kW +VIN = 10V RP RREF 14 REQ =200W 15 16 4 2
Output Voltage Range
NO CAP
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 2.0 mA or less, and at least 8.0 V more positive than the negative supply when the reference current is between 2.0 mA and 4.0 mA. This is necessary to avoid saturation of the output transistors, which would cause serious accuracy degradation.
Output Current Range
Pulsed Referenced Operation
Figure 23. Typical Application
FUNCTIONAL DESCRIPTION
Reference Amplifier Drive and Compensation
Any time the full-scale current exceeds 2.0 mA, the negative supply must be at least 8.0 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.
Accuracy
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 2. 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 5.0 kW, 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.) 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. 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 5.0 V 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 mF to ground. For reference voltages greater than 5.0 V, 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.
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. The DAC-08 series is guaranteed accurate to within "LSB at +25C at a full-scale output current of 1.992 mA. The relative accuracy test circuit is shown in Figure 2. 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. 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 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.
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DAC-08 SERIES
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 W 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. 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 mF supply bypassing for low frequencies, minimum scope lead length, and avoidance of ground loops are all mandatory.
VS + = +15V
VIN C3 VADJ Q1 D3 R1 = 1000W R14 = 5kW VREF = 10V IREF = 2mA 15 16 R15 = 5kW C1 3 C2 1 C5 50W 14 DUT 2 5 6 7 8 9 10 11 12 4 VOUT D1 D2 C4 R3 = 500W R2 = 1000W VOUT
NOTES: VS - = -15V D1, D2 = IN6263 or equivalent D3 = IN914 or equivalent C1 = 0.01mF C2, C3 = 0.1mF Q1 = 2N3904 C4, C5 = 15pF and includes all probe and fixturing capacitance.
Figure 24. Settling Time and Propagation Delay
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 0.1mF 0.1mF 16 13 1
V+
NOTES: ) V REF 255 I [ x ;I )I +I for all logic states FS O O FS R REF 256
Figure 25. Basic DAC-08 Configuration
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DAC-08 SERIES
VREF
R1 R2
14 DAC-08 15 R3
4 2
R4 = 1MW NOTES: R1 = low T.C. R3 = R1 + R2 R2 0.1 R1 to minimize pot. contribution to full-scale drift
V+ RS = 20kW
V-
Figure 26. Recommended Full-Scale and Zero-Scale Adjust
5kW (LOW T.C.)
IR = 2mA 14 15 DAC-08
4
2 5kW
- NE531 OR EQUIV +
VOUT = 0 TO +10V
Figure 27. Unipolar Voltage Output for Low Impedance Output
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DAC-08 SERIES
V = 10V
5kW
5kW VOUT
IR = 2mA 14
4 DAC-08 2 VOUT
a. Positive Output
VOUT
IR = 2mA 14
4 DAC-08 2
b. Negative Output
VOUT
Figure 28. Unipolar Voltage Output for High Impedance Output
V = 10V
10kW 4 IR = 2mA 14 2 DAC-08 VOUT 10kW
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
Figure 29. Basic Bipolar Output Operation (Offset Binary)
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DAC-08 SERIES
ORDERING INFORMATION
Device DAC-08ED DAC-08EDG DAC-08EDR2 DAC-08EDR2G DAC-08CN DAC-08CNG DAC-08EN DAC-08ENG DAC-08HN Description 16-Pin Plastic Small Outline Package 16-Pin Plastic Small Outline Package (Pb-Free) 16-Pin Plastic Small Outline Package 16-Pin Plastic Small Outline Package (Pb-Free) 16-Pin Plastic Dual In-Line Package 16-Pin Plastic Dual In-Line Package (Pb-Free) 16-Pin Plastic Dual In-Line Package 16-Pin Plastic Dual In-Line Package (Pb-Free) 16-Pin Plastic Dual In-Line Package Temperature Range 0 to +70C 0 to +70C 0 to +70C 0 to +70C 0 to +70C 0 to +70C 0 to +70C 0 to +70C 0 to +70C Shipping 48 Units/Rail 48 Units/Rail 2500 Tape & Reel 2500 Tape & Reel 25 Units/Rail 25 Units/Rail 25 Units/Rail 25 Units/Rail 25 Units/Rail
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D.
MARKING DIAGRAMS SOIC-16 D SUFFIX CASE 751B
DAC-08EDG AWLYWW
PDIP-16 N SUFFIX CASE 648
16 DAC-08CN AWLYYWWG 1 1 16 DAC-08EN AWLYYWWG 1 16 DAC-08HN AWLYYWWG
A WL YY, Y WW G
= Assembly Location = Wafer Lot = Year = Work Week = Pb-Free Package
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13
DAC-08 SERIES
PACKAGE DIMENSIONS
SOIC-16 D SUFFIX CASE 751B-05 ISSUE J
-A-
16 9 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 9.80 10.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.19 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.386 0.393 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.008 0.009 0.004 0.009 0_ 7_ 0.229 0.244 0.010 0.019
-B- P
1 8
8 PL
0.25 (0.010)
M
B
S
G F
K C -T-
SEATING PLANE
R
X 45 _
M D
16 PL M
J
0.25 (0.010)
TB
S
A
S
PDIP-16 N SUFFIX CASE 648-08 ISSUE T
-A-
16 9 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL.
B
1 8
F S
C
L
-T- H G D
16 PL
SEATING PLANE
K
J TA
M
M
0.25 (0.010)
M
DIM A B C D F G H J K L M S
INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0_ 10 _ 0.020 0.040
MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0_ 10 _ 0.51 1.01
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PUBLICATION ORDERING INFORMATION
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14
DAC-08/D

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