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HI-DAC80V
TM
Data Sheet
March 2001
File Number
3110.2
12-Bit, Low Cost, Monolithic D/A Converter
The Hl-DAC80V is a monolithic direct replacement for the popular DAC80 and AD DAC80. Single chip construction along with several design innovations make the Hl-DAC80V the optimum choice for low cost, high reliability applications. Intersil' unique Dielectric Isolation (Dl) processing reduces internal parasitics resulting in fast switching times and minimum glitch. On board span resistors are provided for good tracking over temperature, and are laser trimmed to high accuracy. Internally the Hl-DAC80V eliminates code dependent ground currents by routing current from the positive supply to the internal ground node, as determined by an auxiliary R2R ladder. This results in a cancellation of code dependent ground currents allowing virtually zero variation in current through the package common, pin 21. The Hl-DAC80V is available as a voltage output device which is guaranteed over the 0oC to 75oC temperature range. It includes a buried zener reference featuring a low temperature coefficient as well as an on board operational amplifier. The Hl-DAC80V requires only two power supplies and will operate in the range of (11.4V to 16.5V).
Features
* DAC 80V Alternative Source * Monolithic Construction * Fast Settling Time (Typ) . . . . . . . . . . . . . . . . . . . . . . 1.5s * Guaranteed Monotonicity * Wafer Laser Trimmed Linearity, Gain, Offset * Span Resistors On-Chip * On-Board Reference * Supply Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V
Applications
* High Speed A/D Converters * Precision Instrumentation * CRT Display Generation
Pinout
HI-DAC80V (PDIP) TOP VIEW
(MSB) BIT 1 1 BIT 2 2 BIT 3 3 24 6.3V REF OUT 23 GAIN ADJUST 22 +VS 21 COMMON 20 A JUNCTION 19 20V RANGE 18 10V RANGE 17 BIPOLAR OFFSET 16 REF INPUT 15 VOUT 14 -VS 13 NC
Ordering Information
PART NUMBER HI3-DAC80V-5 TEMP. RANGE (oC) 0 to 75 PACKAGE 24 Ld PDIP PKG. NO. E24.6
BIT 4 4 BIT 5 5 BIT 6 6 BIT 7 7 BIT 8 8 BIT 9 9 BIT 10 10 BIT 11 11 (LSB) BIT 12 12
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Americas Inc. Copyright (c) Intersil Americas Inc. 2001, All Rights Reserved
HI-DAC80V Functional Block Diagram
BIPOLAR OFFSET REF IN OUT BIT 1 IN (MSB) BIT 12 IN (LSB) 10V SPAN R
COMMON
+VS
6.3K
GROUND CURRENT CANCELLATION CIRCUIT
20V 5K SPAN R DIGITAL INPUT LEVEL SHIFTERS AND SWITCH DRIVERS 5K
12.6K 2K 2K 2K 2K 2K 2K 2K 2K 2K 1K
SPAN JUNCTION
+
-
1K
1K
1K
1K
1K
1K
1K
1K
1K
1K +
-
VOUT
CONTROL AMP +
-
12.6K
8K
8K
8K
8K
8K
8K
8K
8K
8K
8K
8K
8K
8K
8K
GAIN ADJUST
-VS
2
HI-DAC80V
Absolute Maximum Ratings
Power Supply Inputs +VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +20V -VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20V Reference Input (Pin 16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +VS Output Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5mA Digital Inputs (Bits 1 to 12). . . . . . . . . . . . . . . . . . . . . . . . -1V to +VS
Thermal Information
Thermal Resistance (Typical, Note 1) JA (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Maximum Power Dissipation PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550mW Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 75oC
Die Characteristics
Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bipolar-DI Transistor Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE: 1. JA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
PARAMETER SYSTEM PERFORMANCE Resolution ACCURACY (Note 3) Linear Error Differential Linearity Error Monotonicity Gain Error Offset Error ANALOG OUTPUT Output Ranges (See Figure 2 and Table 2)
TA = 25oC, VS 12V to 15V (Note 5), Pin 16 Shorted to Pin 24, Unless Otherwise Specified TEST CONDITIONS MIN TYP MAX UNITS
-
-
12
Bits
Full Temperature Full Temperature Full Temperature Full Temperature (Notes 2, 4) Full Temperature (Note 2)
-
1/4 1/2 Guaranteed
1/2 3/4
LSB LSB
-
0.1 0.05
0.3 0.15
% FSR % FSR
-
2.5 5 10 0 to 5 0 to 10 0.05 Continuous
-
V V V V V mA -
Output Current Output Resistance Short Circuit Duration DRIFT (Note 3) Total Bipolar Drift (Includes Gain, Offset and Linearity Drifts) Total Error Unipolar Bipolar Gain Full Temperature (Note 6) Full Temperature (Note 6) With Internal Reference Without Internal Reference Full Temperature To Common
5 -
-
-
20
ppm/oC
-
0.08 0.06 15 7
0.15 0.1 30 -
% FSR % FSR ppm/oC ppm/oC
3
HI-DAC80V
Electrical Specifications
PARAMETER Unipolar Offset Bipolar Offset CONVERSION SPEED Settling Time With 10K Feedback With 5K Feedback For 1 LSB Change Slew Rate INTERNAL REFERENCE Output Voltage Output Impedance External Current Tempco of Drift DIGITAL INPUT (Note 2) Logic Levels Logic "1" Logic "0" TTL Compatible At +1A TTL Compatible At -100A +2 0 +5.5 +0.8 V V 6.250 +6.3 1.5 5 6.350 +2.5 V mA ppm/oC Full Scale Transition All Bits ON to OFF or OFF to ON to 0.01% or FSR (Note 3) TA = 25oC, VS 12V to 15V (Note 5), Pin 16 Shorted to Pin 24, Unless Otherwise Specified (Continued) TEST CONDITIONS MIN TYP 1 5 MAX 3 10 UNITS ppm/oC ppm/oC
10
3 1.5 1.5 15
-
s s s V/s
POWER SUPPLY SENSITIVITY (Notes 3, 5) +15V Supply -15V Supply POWER SUPPLY CHARACTERISTICS (Note 5) Voltage Range +VS -VS Current +IS -IS NOTES: 2. Adjustable to zero using external potentiometers. 3. See Definitions. 4. FSR is "Full Scale Range: and is 20V for 10V range, 10V for 5V range, etc. 5. The HI-DAC80V will operate with supply voltages as low as 11.4V. It is recommended that output voltage range -10V to +10V not be used if the supply voltages are less than 12.5V. 6. With Gain and Offset errors adjusted to zero at 25oC. Full Temperature, VS = 15V Full Temperature, VS = 15V +12 -15 +15 -20 mA mA Full Temperature Full Temperature +11.4 -11.4 +15 -15 +16.5 -16.5 V V 0.001 0.001 0.002 0.002 % FSR / %VS % FSR / %VS
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HI-DAC80V Definitions of Specifications
Digital Inputs
The Hl-DAC80V accepts digital input codes in complementary binary, complementary offset binary, and complementary two's complement binary. Total Bipolar Drift (TBD) is the variation of output voltage with temperature, in the bipolar mode of operation. It represents the net effect of drift in Gain, Offset, Linearity and Reference Voltage. Total Bipolar Drift values are calculated, based on measurements as explained above. Gain and Offset need not be calibrated to zero at 25oC. The specified limits for TBD apply for any input code and for any power supply setting within the specified operating range.
Settling Time
That interval between application of a digital step input, and final entry of the analog output within a specified window about the settled value. Intersil Corporation usually specifies a unipolar 10V full scale step, to be measured from 50% of the input digital transition, and a window of 1/2 LSB about the final value. The device output is then rated according to the worst (longest settling) case: low to high, or high to low. In a 12-bit system 1/2 LSB = 0.012% of FSR.
TABLE 1. ANALOG OUTPUT COMPLEMENTARY STRAIGHT BINARY COMPLEMENTARY OFFSET BINARY COMPLEMENTARY TWO'S COMPLEMENT
Accuracy
Linearity Error (Short for "Integral Linearity Error." Also, sometimes called "Integral Nonlinearity" and "Nonlinearity".) The maximum deviation of the actual transfer characteristic from an ideal straight line. The ideal line is positioned according to end-point linearity for D/A converter products from Intersil Corporation, i.e., the line is drawn between the end-points of the actual transfer characteristic (codes 00...0 and 11...1). Differential Linearity Error The difference between one LSB and the output voltage change corresponding to any two consecutive codes. A Differential Nonlinearity of 1 LSB or less guarantees monotonicity. Monotonicity The property of a D/A converter's transfer function which guarantees that the output derivative will not change sign in response to a sequence of increasing (or decreasing) input codes. That is, the only output response to a code change is to remain constant, increase for Increasing code, or decrease for decreasing code. Total Error The net output error resulting from all internal effects (primarily non-ideal Gain, Offset, Linearity and Reference Voltage). Supply voltages may be set to any values within the specified operating range. Gain and offset errors must be calibrated to zero at 25oC. Then the specified limits for Total Error apply for any input code and for any temperature within the specified operating range.
DIGITAL INPUT MSB...LSB 000...000 100...000 111...111 011...111
+ Full Scale Mid Scale-1 LSB Zero +1/2 Full Scale
+ Full Scale -1 LSB - Full Scale Zero
-LSB + Full Scale Zero - Full Scale
Invert MSB with external inverter to obtain CTC Coding. Thermal Drift
Thermal drift is based on measurements at 25oC, at high (TH) and low (TL) temperatures. Drift calculations are made for the high (TH -25oC) and low (25oC-TL) ranges, and the larger of the two values is given as a specification representing worst case drift. Gain Drift, Offset Drift, Reference Drift and Total Bipolar Drift are calculated in parts per million per oC as follows:
6 FSR C GainDrift = ------------------------------- x 10 FSR 6 Offset C OffsetDrift = ------------------------------------- x 10 FSR
Power Supply Sensitivity
Power Supply Sensitivity is a measure of the change in gain and offset of the D/A converter resulting from a change in -VS , or +VS supplies. It is specified under DC conditions and expressed as full scale range percent of change divided by power supply percent change.
FullScaleRange x 100 -----------------------------------------------------------------FSR ( Nominal ) PSS = -----------------------------------------------------------------V S x 100 --------------------------------V S (Nominal)
V REF ( C ) ReferenceDrift = --------------------------------------- x 10 6 V REF V O ( C ) 6 TotalBipolarDrift = ------------------------------- x 10 FSR NOTE: FSR = Full Scale Output Voltage - Zero Scale Output Voltage. FSR = FSR (TH) - FSR (25oC), or FSR (25oC) - FSR (TL). VO = Steady State response to any input code.
Glitch
A glitch on the output of a D/A converter is a transient spike resulting from unequal internal ON-OFF switching times. Worst case glitches usually occur at half-scale, i.e., the major carry code transition from 011...1 to 100...0 or vice versa. For example, if turn ON is greater than OFF for 011...1 to 100...0, an intermediate state of 000...0 exists, such that, the output momentarily glitches toward zero
5
HI-DAC80V
output. Matched switching times and fast switching will reduce glitches considerably. (Measured as one half the Product of duration and amplitude.)
Output Voltage Ranges
24 18 5k 17 6.3K 16 12.6k + 5k 3.9 M 20 -VS 5k TO 100k +VS R2
Decoupling and Grounding
For best accuracy and high frequency performance, the grounding and decoupling scheme shown in Figure 1 should be used. Decoupling capacitors should be connected close to the HI-DAC80V (preferably to the device pins) and should be tantalum or electrolytic bypassed with ceramic types for best high frequency noise rejection.
-VS 0.01F 0.01F +VS 2.8M -VS 10k TO 100k 0.01F
-
19
+VS R1 23
+ CONTROL AMP
-
15 21
1F
1F
FIGURE 2. HI-DAC80V
14 21 22
18 19
TABLE 2. RANGE CONNECTIONS CONNECT RANGE Unipolar 0 to +5V 0 to +10V Bipolar 2.5V 5V 10V PIN 15 18 18 18 18 19 PIN 17 NC NC 20 20 20 PIN 19 20 NC 20 NC 15
24 20
16
+
-
15
TABLE 3. GAIN AND OFFSET CALIBRATIONS FIGURE 1. UNIPOLAR CALIBRATION Step 1: Offset Turn all bits OFF (11 . . . 1) Adjust R2 for 0V out Gain Turn all bits ON (00 . . . 0) Adjust R1 for FS - 1 LSB That is: 4.9988 for 0 to +5V range 9.9976 for 0 to +10V range
Reference Supply
An internal 6.3V reference is provided on board the HI-DAC80V. The voltage (pin 24) is accurate to 0.8% and must be connected to the reference input (pin 16) for specified operation. This reference may be used externally, provided current drain is limited to 2.5mA. An external buffer amplifier is recommended if this reference is to be used to drive other system components. Otherwise, variations in the load driven by the reference will result in gain variations of the HI-DAC80V. All gain adjustments should be made under constant load conditions.
Step 2:
BIPOLAR CALIBRATION Step 1: Offset Turn all bits OFF (11 . . . 1) Adjust R2 for Negative FS That is: -10V for 10V range -5V for 5V range -2.5V for 2.5V range Gain Turn all bits ON (00 . . . 0) Adjust R1 for Positive FS - 1 LSB That is: +9.9951V for 10V Range +4.9976V for 5V Range +2.4988V for 2.5V Range
Step 2:
This Bipolar procedure adjusts the output range end points. The maximum error at zero (half scale) will not exceed the Linearity Error. See the "Accuracy" Specifications.
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HI-DAC80V Die Characteristics
DIE DIMENSIONS 108 mils x 163 mils METALLIZATION Type: Al Thickness: 16kA 2kA TIE SUBSTRATE TO Ground PASSIVATION Type: Nitride over Silox Nitride Thickness: 3.5kA 0.5kA Silox Thickness: 12kA 1.5kA
Metallization Mask Layout
HI-DAC80V
BIT 3 BIT 2 BIT 1 (MSB) 6.3V REF OUT GAIN ADJUST +VS
BIT 4
COMMON
SUMMING JUNCTION
BIT 5
20V SPAN
BIT 6 10V SPAN BIT 7
BIT 8
BIPOLAR OFFSET
BIT 9 REF IN BIT 10 BIT 11 BIT 12 -VS VOUT
7
HI-DAC80V Dual-In-Line Plastic Packages (PDIP)
N E1 INDEX AREA 12 3 N/2 -B-AD BASE PLANE SEATING PLANE D1 B1 B 0.010 (0.25) M D1 A1 A2 L A C L E
E24.6 (JEDEC MS-011-AA ISSUE B)
24 LEAD DUAL-IN-LINE PLASTIC PACKAGE INCHES SYMBOL A A1 A2 B B1 C D D1 E eA eC
C A BS C
MILLIMETERS MIN 0.39 3.18 0.356 0.77 0.204 29.3 0.13 15.24 12.32 MAX 6.35 4.95 0.558 1.77 0.381 32.7 15.87 14.73 NOTES 4 4 8 5 5 6 5 6 7 4 9 Rev. 0 12/93
MIN 0.015 0.125 0.014 0.030 0.008 1.150 0.005 0.600 0.485
MAX 0.250 0.195 0.022 0.070 0.015 1.290 0.625 0.580
-C-
e
eB
NOTES: 1. Controlling Dimensions: INCH. In case of conflict between English and Metric dimensions, the inch dimensions control. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Symbols are defined in the "MO Series Symbol List" in Section 2.2 of Publication No. 95. 4. Dimensions A, A1 and L are measured with the package seated in JEDEC seating plane gauge GS-3. 5. D, D1, and E1 dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 inch (0.25mm). 6. E and eA are measured with the leads constrained to be perpendicular to datum -C- . 7. eB and eC are measured at the lead tips with the leads unconstrained. eC must be zero or greater. 8. B1 maximum dimensions do not include dambar protrusions. Dambar protrusions shall not exceed 0.010 inch (0.25mm). 9. N is the maximum number of terminal positions. 10. Corner leads (1, N, N/2 and N/2 + 1) for E8.3, E16.3, E18.3, E28.3, E42.6 will have a B1 dimension of 0.030 - 0.045 inch (0.76 - 1.14mm).
E1 e eA eB L N
0.100 BSC 0.600 BSC 0.115 24 0.700 0.200
2.54 BSC 15.24 BSC 2.93 24 17.78 5.08
All Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at website www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site www.intersil.com
Sales Office Headquarters
NORTH AMERICA Intersil Corporation 2401 Palm Bay Rd., Mail Stop 53-204 Palm Bay, FL 32905 TEL: (321) 724-7000 FAX: (321) 724-7240 EUROPE Intersil SA Mercure Center 100, Rue de la Fusee 1130 Brussels, Belgium TEL: (32) 2.724.2111 FAX: (32) 2.724.22.05 ASIA Intersil Ltd. 8F-2, 96, Sec. 1, Chien-kuo North, Taipei, Taiwan 104 Republic of China TEL: 886-2-2515-8508 FAX: 886-2-2515-8369
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