AD566A

a FEATURES Single Chip Construction Very High-Speed Settling to 1/2 LSB AD565A: 250 ns max AD566A: 350 ns max Full-Scale Switching Time: 30 ns Guaranteed for Operation with 12 V Supplies: AD565A with –12 V Supply: AD566A Linearity Guaranteed Over Temperature: 1/2 LSB max (K, T Grades) Monotonicity Guaranteed Over Temperature Low Power: AD566A = 180 mW max; AD565A = 225 mW max Use with On-Board High-Stability Reference (AD565A) or with External Reference (AD566A) Low Cost MlL-STD-883-Compliant Versions Available PRODUCT DESCRIPTION REF IN REF GND High Speed 12-Bit Monolithic D/A Converters AD565A*/AD566A* FUNCTIONAL BLOCK DIAGRAMS REF OUT VCC BIPOLAR OFF 20V SPAN 10V 19.95k 0.5mA IREF 20k IOUT = 4 IREF AD565A 9.95k 5k 10V SPAN 5k DAC OUT IO 8k DAC CODE CODE INPUT –VEE POWER MSB GND LSB BIPOLAR OFF 20V SPAN 9.95k 5k 10V SPAN 5k IOUT = 4 IREF AD566A REF IN REF GND 19.95k 0.5mA IREF 20k DAC CODE IO 8k DAC OUT The AD565A and AD566A are fast 12-bit digital-to-analog converters that incorporate the latest advances in analog circuit design to achieve high speeds at low cost. The AD565A and AD566A use 12 precision, high-speed bipolar current-steering switches, control amplifier and a laser-trimmed thin-film resistor network to produce a very fast, high accuracy analog output current. The AD565A also includes a buried Zener reference that features low-noise, long-term stability and temperature drift characteristics comparable to the best discrete reference diodes. The combination of performance and flexibility in the AD565A and AD566A has resulted from major innovations in circuit design, an important new high-speed bipolar process, and continuing advances in laser-wafer-trimming techniques (LWT). The AD565A and AD566A have a 10–90% full-scale transition time less than 35 ns and settle to within ± 1/2 LSB in 250 ns max (350 ns for AD566A). Both are laser-trimmed at the wafer level to ± 1/8 LSB typical linearity and are specified to ± 1/4 LSB max error (K and T grades) at +25°C. High speed and accuracy make the AD565A and AD566A the ideal choice for high-speed display drivers as well as fast analog-to-digital converters. The laser trimming process which provides the excellent linearity is also used to trim both the absolute value and the temperature coefficient of the reference of the AD565A resulting in a typical full-scale gain TC of 10 ppm/°C. When tighter TC performance is required or when a system reference is available, the AD566A may be used with an external reference. * Covered by Patent Nos.: 3,803,590; RE 28,633; 4,213,806; 4,136,349; 4,020,486; 3,747,088. CODE INPUT –VEE POWER MSB GND LSB AD565A and AD566A are available in four performance grades. The J and K are specified for use over the 0°C to +70°C temperature range while the S and T grades are specified for the –55°C to +125°C range. The D grades are all packaged in a 24-lead, hermetically sealed, ceramic, dual-in-line package. The JR grade is packaged in a 28-lead plastic SOIC. PRODUCT HIGHLIGHTS 1. The wide output compliance range of the AD565A and AD566A are ideally suited for fast, low noise, accurate voltage output configurations without an output amplifier. 2. The devices incorporate a newly developed, fully differential, nonsaturating precision current switching cell structure which combines the dc accuracy and stability first developed in the AD562/3 with very fast switching times and an optimally-damped settling characteristic. 3. The devices also contain SiCr thin film application resistors which can be used with an external op amp to provide a precision voltage output or as input resistors for a successive approximation A/D converter. The resistors are matched to the internal ladder network to guarantee a low gain temperature coefficient and are laser-trimmed for minimum full-scale and bipolar offset errors. 4. The AD565A and AD566A are available in versions compliant with MIL-STD-883. Refer to the Analog Devices Military Products Databook or current /883B data sheet for detailed specifications. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000 REV. D Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices 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 Analog Devices. AD565A–SPECIFICATIONS (T = +25 C, V A CC = +15 V, VEE = +15 V, unless otherwise noted.) Min AD565AK Typ Max Units Model DATA INPUTS1 (Pins 13 to 24) TTL or 5 Volt CMOS Input Voltage Bit ON Logic “1” Bit OFF Logic “0” Logic Current (Each Bit) Bit ON Logic “1” Bit OFF Logic “0” RESOLUTION OUTPUT Current Unipolar (All Bits On) Bipolar (All Bits On or Off) Resistance (Exclusive of Span Resistors) Offset Unipolar Bipolar (Figure 3, R2 = 50 Ω Fixed) Capacitance Compliance Voltage TMIN to TMAX ACCURACY (Error Relative to Full Scale) +25°C TMIN to TMAX DIFFERENTIAL NONLINEARITY +25°C TMIN to TMAX TEMPERATURE COEFFICIENTS With Internal Reference Unipolar Zero Bipolar Zero Gain (Full Scale) Differential Nonlinearity SETTLING TIME TO 1/2 LSB All Bits ON-to-OFF or OFF-to-ON FULL-SCALE TRANSITION 10% to 90% Delay plus Rise Time 90% to 10% Delay plus Fall Time TEMPERATURE RANGE Operating Storage POWER REQUIREMENTS VCC, +11.4 to +16.5 V de VEE, –11.4 to –16.5 V dc POWER SUPPLY GAIN SENSITIVITY2 VCC = +11.4 to +16.5 V dc VEE = –11.4 to –16.5 V dc PROGRAMMABLE OUTPUT RANGES (See Figures 2, 3, 4) Min AD565AJ Typ Max +2.0 +120 +35 +5.5 +0.8 +300 +100 12 +2.0 +120 +35 +5.5 +0.8 +300 +100 12 V V µA µA Bits –1.6 0.8 6 –2.0 ± 1.0 8 0.01 0.05 25 –2.4 1.2 10 0.05 0.15 +10 –1.6 0.8 6 –2.0 ± 1.0 8 0.01 0.05 25 –2.4 1.2 10 0.05 0.1 +10 mA mA kΩ % of F.S. Range % of F.S. Range pF V LSB % of F.S. Range LSB % of F.S. Range LSB –1.5 ± 1/4 (0.006) ± 1/2 (0.012) –1.5 ± 1/8 (0.003) ± 1/4 (0.006) 1/2 (0.012) 3/4 (0.018) 1/4 (0.006) 1/2 (0.012) ± 1/2 3/4 MONOTONICITY GUARANTEED ± 1/4 1/2 MONOTONICITY GUARANTEED 1 5 15 2 250 15 30 0 –65 3 –12 3 15 0 to +5 –2.5 to +2.5 0 to +10 –5 to +5 –10 to +10 ± 0.1 ± 0.25 ± 0.15 15 9.90 1.5 ± 0.05 2 10 50 1 5 10 2 250 15 30 0 –65 3 –12 3 15 0 to +5 –2.5 to +2.5 0 to +10 –5 to +5 –10 to +10 ± 0.1 ± 0.25 ± 0.15 15 9.90 1.5 ± 0.05 2 10 20 ppm/°C ppm/°C ppm/°C ppm/°C ns ns ns °C °C mA mA ppm of F.S./% ppm of F.S./% V V V V V 400 30 50 +70 +150 5 –18 10 25 400 30 50 +70 +150 5 –18 10 25 EXTERNAL ADJUSTMENTS Gain Error with Fixed 50 Ω Resistor for R2 (Figure 2) Bipolar Zero Error with Fixed 50 Ω Resistor for R1 (Figure 3) Gain Adjustment Range (Figure 2) Bipolar Zero Adjustment Range REFERENCE INPUT Input Impedance REFERENCE OUTPUT Voltage Current (Available for External Loads)3 POWER DISSIPATION 0.25 0.15 0.25 ± 0.1 % of F.S. Range % of F.S. Range % of F.S. Range % of F.S. Range kΩ V mA mW 20 10.00 2.5 225 25 10.10 345 20 10.00 2.5 225 25 10.10 345 NOTES 1 The digital inputs are guaranteed but not tested over the operating temperature range. 2 The power supply gain sensitivity is tested in reference to a V CC, VEE of ± 15 V dc. 3 For operation at elevated temperatures the reference cannot supply current for external loads. It, therefore, should be buffered if additional loads are to be supplied. Specifications subject to change without notice. –2– REV. D AD565A/AD566A Model DATA INPUTS1 (Pins 13 to 24) TTL or 5 Volt CMOS Input Voltage Bit ON Logic “1” Bit OFF Logic “0” Logic Current (Each Bit) Bit ON Logic “1” Bit OFF Logic “0” RESOLUTION OUTPUT Current Unipolar (All Bits On) Bipolar (All Bits On or Off) Resistance (Exclusive of Span Resistors) Offset Unipolar Bipolar (Figure 3, R2 = 50 Ω Fixed) Capacitance Compliance Voltage TMIN to TMAX ACCURACY (Error Relative to Full Scale) +25°C TMIN to TMAX DIFFERENTIAL NONLINEARITY +25°C TMIN to TMAX TEMPERATURE COEFFICIENTS With Internal Reference Unipolar Zero Bipolar Zero Gain (Full Scale) Differential Nonlinearity SETTLING TIME TO 1/2 LSB All Bits ON-to-OFF or OFF-to-ON FULL-SCALE TRANSITION 10% to 90% Delay plus Rise Time 90% to 10% Delay plus Fall Time TEMPERATURE RANGE Operating Storage POWER REQUIREMENTS VCC, +11.4 to +16.5 V dc VEE, –11.4 to –16.5 V dc POWER SUPPLY GAIN SENSITIVITY2 VCC = +11.4 to +16.5 V dc VEE = –11.4 to –16.5 V dc PROGRAMMABLE OUTPUT RANGES (See Figures 2, 3, 4) Min AD565AS Typ Max Min AD565AT Typ Max Units +2.0 +120 +35 +5.5 +0.8 +300 +100 12 +2.0 +120 +35 +5.5 +0.8 +300 +100 12 V V µA µA Bits –1.6 0.8 6 –2.0 ± 1.0 8 0.01 0.05 25 –2.4 1.2 10 0.05 0.15 +10 –1.6 0.8 6 –2.0 ± 1.0 8 0.01 0.05 25 –2.4 1.2 10 0.05 0.1 +10 mA mA kΩ % of F.S. Range % of F.S. Range pF V LSB % of F.S. Range LSB % of F.S. Range LSB –1.5 ± 1/4 (0.006) ± 1/2 (0.012) –1.5 ± 1/8 (0.003) ± 1/4 (0.006) 1/2 (0.012) 3/4 (0.018) 1/4 (0.006) 1/2 (0.012) ± 1/2 3/4 MONOTONICITY GUARANTEED ± 1/4 1/2 MONOTONICITY GUARANTEED 1 5 15 2 250 15 30 –55 –65 3 –12 3 15 0 to +5 –2.5 to +2.5 0 to +10 –5 to +5 –10 to +10 ± 0.1 ± 0.25 ± 0.15 15 9.90 1.5 ± 0.05 2 10 30 1 5 10 2 250 15 30 –55 –65 3 –12 3 15 0 to +5 –2.5 to +2.5 0 to +10 –5 to +5 –10 to +10 ± 0.1 ± 0.25 ± 0.15 15 9.90 1.5 ± 0.05 2 10 15 ppm/°C ppm/°C ppm/°C ppm/°C ns ns ns °C °C mA mA ppm of F.S./% ppm of F.S./% V V V V V 400 30 50 +125 +150 5 –18 10 25 400 30 50 +125 +150 5 –18 10 25 EXTERNAL ADJUSTMENTS Gain Error with Fixed 50 Ω Resistor for R2 (Figure 2) Bipolar Zero Error with Fixed 50 Ω Resistor for R1 (Figure 3) Gain Adjustment Range (Figure 2) Bipolar Zero Adjustment Range REFERENCE INPUT Input Impedance REFERENCE OUTPUT Voltage Current (Available for External Loads)3 POWER DISSIPATION 0.25 0.15 0.25 0.1 % of F.S. Range % of F.S. Range % of F.S. Range % of F.S. Range kΩ V mA mW 20 10.00 2.5 225 25 10.10 345 20 10.00 2.5 225 25 10.10 345 Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max specifications are guaranteed, although only those shown in boldface are tested on all production units. Specification subject to change without notice. REV. D –3– AD566A–SPECIFICATIONS(T = +25 C, V A EE = –15 V, unless otherwise noted) AD566AK Max Min Typ Max Units AD566AJ Model DATA INPUTS1 (Pins 13 to 24) TTL or 5 Volt CMOS Input Voltage Bit ON Logic “1” Bit OFF Logic “0” Logic Current (Each Bit) Bit ON Logic “1” Bit OFF Logic “0” RESOLUTION OUTPUT Current Unipolar (All Bits On) Bipolar (All Bits On or Off) Resistance (Exclusive of Span Resistors) Offset Unipolar (Adjustable to Zero per Figure 3) Bipolar (Figure 4, R1 and R2 = 50 Ω Fixed) Capacitance Compliance Voltage TMIN to TMAX ACCURACY (Error Relative to Full Scale) +25 °C TMIN to TMAX DIFFERENTIAL NONLINEARITY +25°C TMIN to TMAX TEMPERATURE COEFFICIENTS Unipolar Zero Bipolar Zero Gain (Full Scale) Differential Nonlinearity SETTLING TIME TO 1/2 LSB All Bits ON-to-OFF or OFF-to-ON (Figure 8) FULL-SCALE TRANSITION 10% to 90% Delay plus Rise Time 90% to 10% Delay plus Fall Time POWER REQUIREMENTS VEE, –11.4 to –16.5 V dc POWER SUPPLY GAIN SENSITIVITY 2 VEE = –11.4 to –16.5 V dc PROGRAMMABLE OUTPUT RANGES (see Figures 3, 4, 5) Min Typ +2.0 0 +120 +35 +5.5 +0.8 +300 +100 12 +2.0 0 +120 +35 +5.5 +0.8 +300 +100 12 V V µA µA Bits –1.6 0.8 6 –2.0 ± 1.0 8 0.01 0.05 25 –2.4 1.2 10 0.05 0.15 +10 –1.6 0.8 6 –2.0 ± 1.0 8 0.01 0.05 25 –2.4 1.2 10 0.05 0.1 +10 mA mA kΩ % of F.S. Range % of F.S. Range pF V LSB % of F.S. Range LSB % of F.S. Range LSB ppm/°C ppm/°C ppm/°C ppm/°C ns ns ns mA ppm of F.S./% V V V V V –1.5 ± 1/4 (0.006) ± 1/2 (0.012) –1.5 ± 1/8 (0.003) ± 1/4 (0.006) 1/2 (0.012) 3/4 (0.018) 1/4 (0.006) 1/2 (0.012) ± 1/2 3/4 MONOTONICITY GUARANTEED 1 5 7 2 250 15 30 –12 15 0 to +5 –2.5 to +2.5 0 to +10 –5 to +5 –10 to +10 ± 0.1 ± 0.25 ± 0.15 15 ± 0.05 2 10 10 ± 1/4 1/2 MONOTONICITY GUARANTEED 1 5 3 2 250 15 30 –12 15 0 to +5 –2.5 to +2.5 0 to +10 –5 to +5 –10 to +10 ± 0.1 ± 0.25 ± 0.15 15 ± 0.05 2 10 5 350 30 50 –18 25 350 30 50 –18 25 EXTERNAL ADJUSTMENTS Gain Error with Fixed 50 Ω Resistor for R2 (Figure 3) Bipolar Zero Error with Fixed 50 Ω Resistor for R1 (Figure 4) Gain Adjustment Range (Figure 3) Bipolar Zero Adjustment Range REFERENCE INPUT Input Impedance POWER DISSIPATION MULTIPLYING MODE PERFORMANCE (All Models) Quadrants Reference Voltage Accuracy Reference Feedthrough (Unipolar Mode, All Bits OFF, and 1 V to +10 V [p-p], Sine Wave Frequency for 1/2 LSB [p-p] Feedthrough) Output Slew Rate 10%–90% 90%–10% Output Settling Time (All Bits ON and a 0 V–10 V Step Change in Reference Voltage) CONTROL AMPLIFIER Full Power Bandwidth Small-Signal Closed-Loop Bandwidth 0.25 0.15 0.25 0.1 % of F.S. Range % of F.S. Range % of F.S. Range % of F.S. Range kΩ mW 20 180 25 300 20 180 25 300 Two (2): Bipolar Operation at Digital Input Only +1 V to +10 V, Unipolar 10 Bits (± 0.05% of Reduced F.S.) for 1 V dc Reference Voltage 40 kHz typ 5 mA/µs 1 mA/µs 1.5 µs to 0.01% F.S. 300 kHz 1.8 MHz NOTES 1 The digital input levels are guaranteed but not tested over the temperature range. 2 The power supply gain sensitivity is tested in reference to a V EE of –1.5 V dc. Specifications subject to change without notice. –4– REV. D AD565A/AD566A AD566AS Model DATA INPUTS (Pins 13 to 24) TTL or 5 Volt CMOS Input Voltage Bit ON Logic “1” Bit OFF Logic “0” Logic Current (Each Bit) Bit ON Logic “1” Bit OFF Logic “0” RESOLUTION OUTPUT Current Unipolar (All Bits On) Bipolar (All Bits On or Off) Resistance (Exclusive of Span Resistors) Offset Unipolar (Adjustable to Zero per Figure 3) Bipolar (Figure 4, R1 and R2 = 50 Ω Fixed) Capacitance Compliance Voltage TMIN to TMAX ACCURACY (Error Relative to Full Scale) +25 °C TMIN to TMAX DIFFERENTIAL NONLINEARITY +25°C TMIN to TMAX TEMPERATURE COEFFICIENTS Unipolar Zero Bipolar Zero Gain (Full Scale) Differential Nonlinearity SETTLING TIME TO 1/2 LSB All Bits ON-to-OFF or OFF-to-ON (Figure 8) FULL-SCALE TRANSITION 10% to 90% Delay plus Rise Time 90% to 10% Delay plus Fall Time POWER REQUIREMENTS VEE, –11.4 to –16.5 V dc POWER SUPPLY GAIN SENSITIVITY 2 VEE = –11.4 to –16.5 V dc PROGRAMMABLE OUTPUT RANGES (see Figures 3, 4, 5) 1 AD566AT Max Min Typ Max Units Min Typ +2.0 0 +120 +35 +5.5 +0.8 +300 +100 12 +2.0 0 +120 +35 +5.5 +0.8 +300 +100 12 V V µA µA Bits –1.6 0.8 6 –2.0 ± 1.0 8 0.01 0.05 25 –2.4 1.2 10 0.05 0.15 +10 –1.6 0.8 6 –2.0 ± 1.0 8 0.01 0.05 25 –2.4 1.2 10 0.05 0.1 +10 mA mA kΩ % of F.S. Range % of F.S. Range pF V LSB % of F.S. Range LSB % of F.S. Range LSB ppm/°C ppm/°C ppm/°C ppm/°C ns ns ns mA ppm of F.S./% V V V V V –1.5 ± 1/4 (0.006) ± 1/2 (0.012) –1.5 ± 1/8 (0.003) ± 1/4 (0.006) 1/2 (0.012) 3/4 (0.018) 1/4 (0.006) 1/2 (0.012) ± 1/2 3/4 MONOTONICITY GUARANTEED 1 5 7 2 250 15 30 –12 15 0 to +5 –2.5 to +2.5 0 to +10 –5 to +5 –10 to +10 ± 0.1 ± 0.25 ± 0.15 15 ± 0.05 2 10 10 ± 1/4 1/2 MONOTONICITY GUARANTEED 1 5 3 2 250 15 30 –12 15 0 to +5 –2.5 to +2.5 0 to +10 –5 to +5 –10 to +10 ± 0.1 ± 0.25 ± 0.15 15 ± 0.05 2 10 5 350 30 50 –18 25 350 30 50 –18 25 EXTERNAL ADJUSTMENTS Gain Error with Fixed 50 Ω Resistor for R2 (Figure 3) Bipolar Zero Error with Fixed 50 Ω Resistor for R1 (Figure 4) Gain Adjustment Range (Figure 3) Bipolar Zero Adjustment Range REFERENCE INPUT Input Impedance POWER DISSIPATION MULTIPLYING MODE PERFORMANCE (All Models) Quadrants Reference Voltage Accuracy Reference Feedthrough (Unipolar Mode, All Bits OFF, and 1 V to +10 V [p-p], Sine Wave Frequency for l/2 LSB [p-p] Feedthrough) Output Slew Rate 10%–90% 90%–10% Output Settling Time (All Bits ON and a 0 V–10 V Step Change in Reference Voltage) CONTROL AMPLIFIER Full Power Bandwidth Small-Signal Closed-Loop Bandwidth 0.25 0.15 0.25 0.1 % of F.S. Range % of F.S. Range % of F.S. Range % of F.S. Range kΩ mW 20 180 25 300 20 180 25 300 Two (2): Bipolar Operation at Digital Input Only +1 V to +10 V, Unipolar 10 Bits (± 0.05% of Reduced F.S.) for 1 V dc Reference Voltage 40 kHz typ 5 mA/µs 1 mA/µs 1.5 µs to 0.01% F.S. 300 kHz 1.8 MHz NOTES Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max specifications are guaranteed, although only those shown in boldface are tested on all production units. Specification subject to change without notice. REV. D –5– AD565A/AD566A ABSOLUTE MAXIMUM RATINGS GROUNDING RULES VCC to Power Ground . . . . . . . . . . . . . . . . . . . . . 0 V to +18 V VEE to Power Ground (AD565A) . . . . . . . . . . . . 0 V to –18 V Voltage on DAC Output (Pin 9) . . . . . . . . . . . . –3 V to +12 V Digital Inputs (Pins 13 to 24) to Power Ground . . . . . . . . . . . . . . . . . . . . . . –1.0 V to +7.0 V REF IN to Reference Ground . . . . . . . . . . . . . . . . . . . . ± 12 V Bipolar Offset to Reference Ground . . . . . . . . . . . . . . . ± 12 V 10 V Span R to Reference Ground . . . . . . . . . . . . . . . . ± 12 V 20 V Span R to Reference Ground . . . . . . . . . . . . . . . . ± 24 V REF OUT (AD565A) . . . . . Indefinite Short to Power Ground Momentary Short to VCC Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 mW AD565A ORDERING GUIDE Max Gain T.C. (ppm of F.S./ C) 50 50 20 30 15 Temperature Range 0°C to +70°C 0°C to +70°C 0°C to +70°C –55°C to +125°C –55°C to +125°C Linearity Error Max Package @ +25 C Options2 ± 1/2 LSB ± 1/2 LSB ± 1/4 LSB ± 1/2 LSB ± 1/4 LSB Ceramic (D-24) SOIC (R-28) Ceramic (D-24) Ceramic (D-24) Ceramic (D-24) The AD565A and AD566A bring out separate reference and power grounds to allow optimum connections for low noise and high-speed performance. These grounds should be tied together at one point, usually the device power ground. The separate ground returns are provided to minimize current flow in low-level signal paths. In this way, logic return currents are not summed into the same return path with analog signals. CONNECTING THE AD565A FOR BUFFERED VOLTAGE OUTPUT Model1 AD565AJD AD565AJR AD565AKD AD565ASD AD565ATD 1 NOTES For details on grade and package offerings screened in accordance with MILSTD-883, refer to the Analog Devices Military Products Databook or current/ 883B data sheet. 2 D = Ceramic DIP, R = SOIC. The standard current-to-voltage conversion connections using an operational amplifier are shown here with the preferred trimming techniques. If a low offset operational amplifier (AD510L, AD517L, AD741L, AD301AL, AD OP07) is used, excellent performance can be obtained in many situations without trimming (an op amp with less than 0.5 mV max offset voltage should be used to keep offset errors below 1/2 LSB). If a 50 Ω fixed resistor is substituted for the 100 Ω trimmer, unipolar zero will typically be within ± 1/2 LSB (plus op amp offset), and full-scale accuracy will be within 0.1% (0.25% max). Substituting a 50 Ω resistor for the 100 Ω bipolar offset trimmer will give a bipolar zero error typically within ± 2 LSB (0.05%). The AD509 is recommended for buffered voltage-output applications which require a settling time to ± 1/2 LSB of one microsecond. The feedback capacitor is shown with the optimum value for each application; this capacitor is required to compensate for the 25 picofarad DAC output capacitance. AD566A ORDERING GUIDE Max Gain T.C. (ppm of F.S./ C) 10 3 10 3 Temperature Range 0°C to +70°C 0°C to +70°C –55°C to +125 °C –55°C to +125 °C Linearity Error Max Package @ +25 C Option2 ± 1/2 LSB ± 1/4 LSB ± 1/2 LSB ± 1/4 LSB Ceramic Ceramic Ceramic Ceramic (D-24) (D-24) (D-24) (D-24) Model1 AD566AJD AD566AKD AD566ASD AD566ATD NOTES 1 For details on grade and package offerings screened in accordance with MILSTD-883, refer to the Analog Devices Military Products Databook or current/ 883B data sheet. 2 D = Ceramic DIP. –6– REV. D AD565A/AD566A PIN DESIGNATIONS 24-Lead DIP NC 1 NC 2 24 23 22 21 BIT 1 IN (MSB) BIT 2 IN BIT 3 IN BIT 4 IN BIT 5 IN NC 1 NC 2 REF GND 3 AMP SUMMING JUNCTION 4 REF V HI IN 5 –VEE –15V IN (20mA) BIPOLAR OFFSET IN NC DAC OUT (–2mA F.S.) 6 24 23 22 21 BIT 1 IN (MSB) BIT 2 IN BIT 3 IN BIT 4 IN BIT 5 IN VCC 3 REF OUT (+10V ±1%) 4 REF GND 5 REF IN 6 AD565A 20 AD566A 20 TOP VIEW 19 BIT 6 IN –VEE 7 (Not to Scale) 18 BIT 7 IN 17 16 15 14 13 TOP VIEW 19 BIT 6 IN 7 (Not to Scale) 18 BIT 7 IN 8 9 17 16 15 14 13 BIPOLAR OFFSET IN 8 DAC OUT (–2mA F.S.) 9 BIT 8 IN BIT 9 IN BIT 10 IN BIT 11 IN BIT 12 IN (LSB) BIT 8 IN BIT 9 IN BIT 10 IN BIT 11 IN BIT 12 IN (LSB) 10V SPAN R 10 20V SPAN R 11 PWR GND 12 10V SPAN R 10 20V SPAN R 11 PWR GND 12 NC = NO CONNECT NC = NO CONNECT 28-Lead SOIC NC 1 NC NC 2 3 28 27 26 25 24 NC BIT 1 (MSB) BIT 2 BIT 3 BIT 4 BIT 5 VCC 4 REF OUT (10V) REF GND REF IN NC –VEE 5 6 7 AD565A 23 TOP VIEW 22 BIT 6 8 (Not to Scale) 21 BIT 7 9 20 19 18 17 16 15 BIT 8 BIT 9 BIT 10 BIT 11 BIT 12 (LSB) PWR GND BIPOLAR OFFSET IN 10 DAC OUT 11 NC 12 10V SPAN R 13 20V SPAN R 14 NC = NO CONNECT REV. D –7– AD565A/AD566A FIGURE 1. UNIPOLAR CONFIGURATION STEP I . . . OFFSET ADJUST This configuration will provide a unipolar 0 volt to +10 volt output range. In this mode, the bipolar terminal, Pin 8, should be grounded if not used for trimming. +15V 100k 100 REF OUT VCC BIPOLAR OFF 20V SPAN 9.95k R2 100 10V 5k 5k 10pF IO 8k DAC OUT AD509 2.4k OUTPUT 0V TO +10V 10V SPAN R1 50k –15V Turn OFF all bits. Adjust 100 Ω trimmer R1 to give –5.000 volts output. STEP II . . . GAIN ADJUST Turn ON All bits. Adjust 100 Ω gain trimmer R2 to give a reading of +4.9976 volts. Please note that it is not necessary to trim the op amp to obtain full accuracy at room temperature. In most bipolar situations, an op amp trim is unnecessary unless the untrimmed offset drift of the op amp is excessive. FIGURE 3. OTHER VOLTAGE RANGES AD565A 19.95k 0.5mA IREF 20k REF IN REF GND DAC IOUT = 4 IREF CODE CODE INPUT MSB POWER GND –VEE LSB Figure 1. 0 V to +10 V Unipolar Voltage Output STEP I . . . ZERO ADJUST The AD565A can also be easily configured for a unipolar 0 volt to +5 volt range or ± 2.5 volt and ± 10 volt bipolar ranges by using the additional 5k application resistor provided at the 20 volt span R terminal, Pin 11. For a 5 volt span (0 to +5 or ± 2.5), the two 5k resistors are used in parallel by shorting Pin 11 to Pin 9 and connecting Pin 10 to the op amp output and the bipolar offset either to ground for unipolar or to REF OUT for the bipolar offset either to ground for unipolar or to REF OUT for the bipolar range. For the ± 10 volt range (20 volt span) use the 5k resistors in series by connecting only Pin 11 to the op amp output and the bipolar offset connected as shown. The ± 10 volt option is shown in Figure 3. Turn all bits OFF and adjust zero trimmer R1, until the output reads 0.000 volts (1 LSB = 2.44 mV). In most cases this trim is not needed, but Pin 8 should then be connected to Pin 12. STEP II . . . GAIN ADJUST REF OUT VCC R1 100 BIPOLAR OFF 20V SPAN 9.95k R2 100 10V 5k 5k 10V SPAN 10pF Turn all bits ON and adjust 100 Ω gain trimmer R2, until the output is 9.9976 volts. (Full scale is adjusted to 1 LSB less than nominal full scale of 10.000 volts.) If a 10.2375 V full scale is desired (exactly 2.5 mV/bit), insert a 120 Ω resistor in series with the gain resistor at Pin 10 to the op amp output. FIGURE 2. BIPOLAR CONFIGURATION AD565A 19.95k 0.5mA IREF 20k IO 8 k REF IN REF GND DAC OUT AD509 3.0k OUTPUT –10V TO +10V DAC IOUT = 4 IREF CODE CODE INPUT MSB LSB This configuration will provide a bipolar output voltage from –5.000 to +4.9976 volts, with positive full scale occurring with all bits ON (all 1s). POWER GND –VEE Figure 3. ± 10 V Voltage Output REF OUT VCC R1 100 BIPOLAR OFF 20V SPAN 9.95k R2 100 10V 5k 5k 10pF IO 8k DAC OUT AD509 2.4k OUTPUT –5V TO +5V 10V SPAN AD565A 19.95k 0.5mA IREF 20k REF IN REF GND DAC IOUT = 4 IREF CODE CODE INPUT MSB LSB POWER GND –VEE Figure 2. ± 5 V Bipolar Voltage Output –8– REV. D AD565A/AD566A CONNECTING THE AD566A FOR BUFFERED VOLTAGE OUTPUT FIGURE 5. BIPOLAR CONFIGURATION The standard current-to-voltage conversion connections using an operational amplifier are shown here with the preferred trimming techniques. If a low offset operational amplifier (AD510L, AD517L, AD741L, AD301AL, AD OP07) is used, excellent performance can be obtained in many situations without trimming (an op amp with less than 0.5 mV max offset voltage should be used to keep offset errors below 1/2 LSB). If a 50 Ω fixed resistor is substituted for the 100 Ω trimmer, unipolar zero will typically be within ± 1/2 LSB (plus op amp offset), and full scale accuracy will be within 0.1% (0.25% max). Substituting a 50 Ω resistor for the 100 Ω bipolar offset trimmer will give a bipolar zero error typically within ± 2 LSB (0.05%). The AD509 is recommended for buffered voltage-output applications which require a settling time to ± 1/2 LSB of one microsecond. The feedback capacitor is shown with the optimum value for each application; this capacitor is required to compensate for the 25 picofarad DAC output capacitance. FIGURE 4. UNIPOLAR CONFIGURATION This configuration will provide a bipolar output voltage from –5.000 volts to +4.9976 volts, with positive full scale occurring with all bits ON (all 1s). R1 100 BIPOLAR OFF 20V SPAN 9.95k 5k 5k AD566A 10V SPAN R2 100 REF IN 19.95k 10pF 0.5mA IREF IO 8k DAC OUT AD509 2.4k +V 10V EREF AD561 REF GND DAC IOUT = 4 IREF CODE CODE INPUT MSB LSB 20k POWER GND –VEE This configuration will provide a unipolar 0 volt to +10 volt output range. In this mode, the bipolar terminal, Pin 7, should be grounded if not used for trimming. +15V 100 100k BIPOLAR OFF R1 50k –15V 20V SPAN 9.95k 5k 5k R2 100 +V 10V Figure 5. ± 5 V Bipolar Voltage Output STEP I . . . OFFSET ADJUST Turn OFF all bits. Adjust 100 Ω trimmer R1 to give –5.000 output volts. STEP II . . . GAIN ADJUST AD566A Turn ON all bits. Adjust 100 Ω gain trimmer R2 to give a reading of +4.9976 volts. Please note that it is not necessary to trim the op amp to obtain full accuracy at room temperature. In most bipolar situations, an op amp trim is unnecessary unless the untrimmed offset drift of the op amp is excessive. 10V SPAN REF IN 19.95k EREF AD561 REF GND POWER GND –VEE 10pF 0.5mA IREF IO 8k DAC OUT AD509 2.4k DAC IOUT = 4 IREF CODE CODE INPUT MSB LSB 20k Figure 4. 0 V to +10 V Unipolar Voltage Output STEP I . . . ZERO ADJUST Turn all bits OFF and adjust zero trimmer, R1, until the output reads 0.000 volts (1 LSB = 2.44 mV). In most cases this trim is not needed, but Pin 7 should then be connected to Pin 12. STEP II . . . GAIN ADJUST Turn all bits ON and adjust 100 Ω gain trimmer, R2, until the output is 9.9976 volts. (Full scale is adjusted to 1 LSB less than nominal full scale of 10.000 volts.) If a 10.2375 V full scale is desired (exactly 2.5 mV/bit), insert a 120 Ω resistor in series with the gain resistor at Pin 10 to the op amp output. REV. D –9– AD565A/AD566A FIGURE 6. OTHER VOLTAGE RANGES Table I. Digital Input Codes DIGITAL INPUT MSB LSB Straight Binary Zero Mid Scale – 1 LSB +1/2 FS +FS – l LSB ANALOG OUTPUT Offset Binary –FS Zero – 1 LSB Zero + FS – 1 LSB Twos Compl.* Zero +FS – 1 LSB –FS Zero – 1 LSB The AD566A can also be easily configured for a unipolar 0 volt to +5 volt range or ± 2.5 volt and ± 10 volt bipolar ranges by using the additional 5k application resistor provided at the 20 volt span R terminal, Pin 11. For a 5 volt span (0 V to +5 V or ± 2.5 V), the two 5k resistors are used in parallel by shorting Pin 11 to Pin 9 and connecting Pin 10 to the op amp output and the bipolar offset resistor either to ground for unipolar or to VREF for the bipolar range. For the ± 10 volt range (20 volt span) use the 5k resistors in series by connecting only Pin 11 to the op amp output and the bipolar offset connected as shown. The ± 10 volt option is shown in Figure 6. 000000000000 011111111111 100000000000 111111111111 *Inverts the MSB of the offset binary code with an external inverter to obtain twos complement. R1 5k BIPOLAR OFF 20V SPAN AD566A 9.95k 14k R2 5k 5k 5k REF IN 19.95k 0.5mA IREF 20k IO 8k 10V SPAN 10pF DAC OUT AD509 2.4k –V 7.5V EREF AD561 REF GND DAC IOUT = 4 IREF CODE CODE INPUT MSB LSB POWER GND –VEE R3 26k * * THE PARALLEL COMBINATION OF THE BIPOLAR OFFSET RESISTOR AND R3 ESTABLISHES A CURRENT TO BALANCE THE MSB CURRENT. THE EFFECT OF TEMPERATURE COEFFICIENT MISMATCH BETWEEN THE BIPOLAR RESISTOR COMBINATION AND DAC RESISTORS IS EXPANDED ON PREVIOUS PAGE. Fgure 6. ± 10 V Voltage Output – 10 – REV. D AD565A/AD566A OUTLINE DIMENSIONS Dimensions shown in inches and (mm). Ceramic DIP (D-24) 0.005 (0.13) MIN 24 0.098 (2.49) MAX 13 1 12 PIN 1 1.290 (32.77) MAX 0.225 (5.72) MAX 0.200 (5.08) 0.120 (3.05) 0.023 (0.58) 0.014 (0.36) 0.100 (2.54) BSC 0.070 (1.78) 0.030 (0.76) 0.075 (1.91) 0.015 (0.38) 0.150 (3.81) MIN SEATING PLANE 0.620 (15.75) 0.590 (14.99) 0.015 (0.38) 0.008 (0.20) SOIC (R-28) Package 0.7125 (18.10) 0.6969 (17.70) 28 15 1 14 PIN 1 0.1043 (2.65) 0.0926 (2.35) 0.4193 (10.65) 0.3937 (10.00) 0.2992 (7.60) 0.2914 (7.40) 0.0291 (0.74) x 45° 0.0098 (0.25) 0.0118 (0.30) 0.0040 (0.10) 0.0500 (1.27) BSC 8° 0.0500 (1.27) 0.0192 (0.49) 0° 0.0157 (0.40) SEATING 0.0125 (0.32) 0.0138 (0.35) PLANE 0.0091 (0.23) REV. D – 11 – PRINTED IN U.S.A. C1814a–0–3/00 (rev. D) 0.610 (15.49) 0.500 (12.70)