3582

FEATURES .HIGH OUTPUT SWINGS, up to j::145V (35821 .LARGE LOAD CURRENTS, up to j::6OmA (35801 .DIFFICUL T TO DAMAGE, automatic thermal shutoff .REDUCES SOURCE LOADING, 1O11 n Input Z .PRESERVES SYSTEM ACCURACY, 11OdB CM R 2OpA bias current DESCRIPTION The 3580 series is the first family of I ntegrated Circuit operational amplifiers which will provide output voltage swings of up to ::t 145V . The monolithic F--ET input stage has low bias currents (20pA) which minimizes the offset voltages caused by the bias current and the large resistance normally associated with high voltage circuits. The 3580 series is packaged in a TO-3 package which will dissipate over 3W of power without a heat sink and 4.5W with a suitable heat sink. The input stage is protected against overvoltages and the output stage is protected against short-circuitsto-ground. A special thermal sensing circuit prevents damage to the amplifier by automatically shutting the amplifier down when too much power is being dissipated. International Airport Industrial Park -P .0. 8ox 11400 -Tucson. Arizona 85734 -Tel. [6021 746-1111 -Twx: 910-952.1111 .Cable. 88RCORP -Telex: 66-6491 @ 1975 Burr-Brown Corporation PDS-313D Printed in U.S.A. May, 1987 SBOS166 TION advantages not normally available in modular or discrete component units. The amplifiers have thermal sensing and shut-off circuitry which automatically turns the amplifier off when the internal temperature reaches approximately 150°C. This is accomplished by sensing the substrate temperature and deactivating the input stage current source when the temperature reaches a critical level. As this happens, the output load current limits at a safe value and the amplifier's quiescent current decreases. If the cause of the abnormal power dissipation is continuous (such as a short circuit across the load) the output current may remain at a low value or oscillate between two values d-ependi-ng on the amount of power being dissipated and the heat sink conditions seen by the amplifier. In either case, the amplifier will not sustain internal damage and will return to normal operation within a few seconds after the abnormal condition is removed. The incorporation of thermal sensing and shut-off in the amplifier will allow the use of a smaller heat sink than would otherwise be required. This is due to the fact that the amplifier will protect itself and does not require a massive heat sink for protection under abnormal conditions. Another unique feature of the 3580 family is the thorough testing of the unit receiver. In addition to the normal tests, all amplifiers are 100% tested for input protection at the full rated differential voltage ( +v " -V ,( ). Each unit is also 100% tested for output maximum supply voltage. that is In these short circuit to common at The 3581 and 3582 have a unique feature important in many high voltage applications. two models the input bias current is virtually independent of the applied common-mode voltage. This is accomplished by the true cascode input stage which keeps the drain-to-source voltage of the input transistors constant as the common-mode voltage changes. OPERATION FROM A SINGLE SUPPLY It may be desirable in some applications to operate the amplifiers from a single supply. The circuit in Figure 3 illustrates a typical application. eo = ej [ RO ~ R ) +300VOC RO ~ +R II N ote that there are restrictions on the input and output voltages (ei and e,,) which are necessary in order to keep the amplifier circuits operating in a linear manner. It should be noted that when the 3581 and 3582 amplifiers are operated from a single supply, the output stage, which is still short-circuit-current limited and thermally protected, is not protected against short circuits to ground (the 3580 will still be short circuit protected under these conditions). When the amplifiers are operated from a single supply, the voltage across one of the output transistors is high enough that secondary breakdown is a consideration. The output current must be limited in order to prevent damage. This can be done by keeping the load resistor larger than 5kO for the 3582 and greater than IkO for the 3581. v e. I + r ':1; l21 I~+ +10V ~ ej ~ +290V +5V ~ eo ~ +290V ' t RL-eo FIGURE 3. Operation from a Single Supply. The 3580 family. of integrated circuit high voltage amplifiers provides performance which previously was only available in bulky modular packages (see Figures I and 2). In addition to the smaller size and inherent reliability, the integrated circuit construction offers other ELECTRICAL Typical at TCASE = -: 25°C max unless otherwise note~ 3580J 3581J MODELS I POWER I Voltage. SUPPLY :!:Vcc 3582J ISVDC to max :32VDC :!:75VDC :!:8mA ta !:70VDC to :!:150VDC :!:65mA I Quiescent i RATED I Voltage. Current. OUTPUT :!:'iVCCI c3SVDC J::10mA -5 \,- DC,min IOVDC to :30VDC J:60mA :100mA :27VDC :!:7OVDC :!:3OmA :!:SOmA 1OnF to Current, min Current, Short Circuit ~pacitance, max ;:65VDC to :!:145VDC :!:15mA :!:25mA i OPEN-LOO~ No Load. DC Rated Load. DC. min FREOUENCYRESPONSE Unity Gain Bandwidth. Full Power Bandwidth Slew Rate SettlinqTime.O.1% Small Signal 100kHz 15V/IJs 106dB 86dB 112dB 94dB 118dB 100dB SMHz. min 60kHz 20V/!ls 12!ls 30kHz 20V/,,5 ~ INPUT OFFSET VOl TAGE Initial at TCASE = +25°C. max Voltage max :!:10mV :!:30IJV/OC 100IJV/V 100IJV/mc :t3mV 12S}lV/OC 20}lV/V SO}lV/mo :!:3mV :!:25IJV/OC 20IJVN 50IJV/mo Drift vs Temp, Drift vs Supply Drift vs Time I INPUT BIAS CURRENT Initial at ICASE = +25°C. Voltage max -50pA O.5pA/\t I -20pA 20pA every 10°C Drift vs Temp Drift vs Supply doubles 02pA/V 02pA/v rlNPUT OFFSET CURRENT Initial at TCASE = +25°C. Drift vs Temp Drift vs Supply INPUT Voltage max I doubles :!:20pA very e 0oC 1 OSpA/V 02pA/V 02pA/V IMPEDANCE 1011!110pF 101111 Differential Common-mode INPUT Voltage NOISE 001 Hz to 10Hz. p-p rms to 10Hz. p-p RANGE 1!JV 1pA SIJV 17IJV 03pA 10Hzto1kHz. Current 001Hz INPUT VOlTAGE 17IJV 03pA Max Safe Differential Voltage(1) Max Safe Common-mode Voltage Common-mode Operation Common-mode TEMPERATURE Specification Operating Storage NOTE. 1 On Models 3581 and 3582 the inputs Voltage. Rejection Case Linear -VD +V{ -vcc ;0 -VCr: Vcc -10 v Vcc -!1v 86dB 110dB Vcc -10 110dB 0°C to 70°C .55°C to +125°C 55°C to +150°C may be damaged by pulses at pins 5 or 6 with dV /dt?1 V /nsl. Any possible damage can be eliminated by limiting the input current to 150mA with external resistors in series with those pins. No external protection is needed for slower voltage The information BURR-BROWN provided herein is believed to be reliable; however, assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. TYPICAL PERFORMANCE and :tVcc max unless otherwise CURVES noted TCASE = +25°C -50 -25 0 25 50 75 100 125 Case Temperature roC I OPEN-LOOP GAIN VS SUPPL y VOL T AGE A T MAX LOAD MAXIMUM POWER DISSIPATION 11) "0 0: ta (!J c. O O -' 0, 0) c. O [~ + ~ 40 50 60 70 80 90 100 110 25 50 10 100 1k 10k 100k 1M 10M iHzi Frequency Power Supply 1%of maxi 75 100 125 Temperature ,0( 150 TOTAL INPUT NOISE VOLTAGE VS SOURCE RESISTANCE TOTALLOWFREOUENCYINPUT NOISE VS SOURCE RESISTANCE -25 O 25 50 75100 (oGI 125 103 104 Source 105 106 10; (01 108 Temperature Resistance COMMON-MODE REJECTION VS FREQUENCY POWER SUPPL Y REJECTION VSFREOUENCY 130 ~ -Vcc =:t75V - ~-VCC=:t150V m ~ a: ~