34 MHz, CBFET a Fast Settling Op Amp AD843 CONNECTION DIAGRAMS FEATURES AC PERFORMANCE 16-Pin SOIC (R-16) Package Plastic (N-8) and Unity Gain Bandwidth: 34 MHz Cerdip (Q-8) Package Fast Settling: 135 ns to 0.01% Slew Rate: 250 V/ms Stable at Gains of 1 or Greater Full Power Bandwidth: 3.9 MHz DC PERFORMANCE Input Offset Voltage: 1 mV max (AD843K/B Input Bias Current: 0.6 nA typ Input Voltage Noise: 19 nV/Hz Open Loop Gain: 30 V/mV into a 500 V Load Output Current: 50 mA min Supply Current: 13 mA max Available in 8-Pin Plastic Mini-DIP & Cerdip, 16-Pin SOIC, TO-8 (H-12A) Package LCC (E-20A) Package 20-Pin LCC and 12-Pin Hermetic Metal Can Packages Available in Tape and Reel in Accordance with EIA-481A Standard Chips and MIL-STD-883B Parts Also Available APPLICATIONS High Speed Sample-and-Hold Amplifiers High Bandwidth Active Filters High Speed Integrators High Frequency Signal Conditioning PRODUCT DESCRIPTION The AD843 is a fast settling, 34 MHz, CBFET input op amp. The AD843 combines the low (0.6 nA) input bias currents characteristic of a FET input amplifier while still providing a 34 MHz bandwidth and a 135 ns settling time (to within 0.01% The AD843 is offered in either 8-pin plastic DIP or hermetic of final value for a 10 volt step). The AD843 is a member of the cerdip packages, in 16-pin SOIC, 20-Pin LCC, or in a 12-pin Analog Devices family of wide bandwidth operational amplifi- metal can. Chips are also available. ers. These devices are fabricated using Analog Devices junction isolated complementary bipolar (CB) process. This process per- PRODUCT HIGHLIGHTS mits a combination of dc precision and wideband ac perform- 1. The high slew rate, fast settling time and low input bias cur- ance previously unobtainable in a monolithic op amp. rent of the AD843 make it the ideal amplifier for 12-bit D/A and A/D buffers, for high speed sample-and-hold amplifiers The 250 V/s slew rate and 0.6 nA input bias current of the and for high speed integrator circuits. The AD843 can re- AD843 ensure excellent performance in high speed sample-and- place many FET input hybrid amplifiers such as the hold applications and in high speed integrators. This amplifier is LH0032, LH4104 and OPA600. also ideally suited for high bandwidth active filters and high fre- quency signal conditioning circuits. 2. Fully differential inputs provide outstanding performance in all standard high frequency op amp applications such as sig- Unlike many high frequency amplifiers, the AD843 requires no nal conditioning and active filters. external compensation and it remains stable over its full operat- ing temperature range. It is available in five performance grades: 3. Laser wafer trimming reduces the input offset voltage to the AD843J and AD843K are rated over the commercial 1 mV max (AD843K and AD843B). temperature range of 0C to +70C. The AD843A and AD843B 4. Although external offset nulling is unnecessary in many ap- are rated over the industrial temperature range of 40C to +85C. plications, offset null pins are provided. The AD843S is rated over the military temperature range of 55C 5. The AD843 does not require external compensation at to +125C and is available processed to MIL-STD-883B, Rev. C. closed loop gains of 1 or greater. REV. D Information furnished by Analog Devices is believed to be accurate and Analog Devices, Inc., 1995 reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 617/329-4700 Fax: 617/326-8703 ( T = +25C and 15 V dc, unless otherwise noted) AD843SPECIFICATIONS A 1 AD843J/A AD843K/B AD843S Model Conditions Min Typ Max Min Typ Max Min Typ Max Units 1 INPUT OFFSET VOLTAGE 1.0 2.0 0.5 1.0 1.0 2.0 mV T -T 1.7 4.0 1.2 2.0 3.0 4.5 mV MIN MAX Offset Drift 12 12 35 12 V/C INPUT BIAS CURRENT Initial (T = +25C) 50 40 50 pA J 2 Warmed-Up 0.8 2.5 0.6 1.0 0.8 2.5 nA T -T 60/160 23/65 2600 nA MIN MAX INPUT OFFSET CURRENT Initial (T = +25C) 30 20 30 pA J 2 Warmed-Up 0.25 1.0 0.2 0.4 0.25 1.0 nA T -T 23/64 9/26 1025 nA MIN MAX INPUT CHARACTERISTICS 10 10 10 Input Resistance 10 10 10 Input Capacitance 6 6 6 pF INPUT VOLTAGE RANGE Common Mode 610 +12, 610 +12, 610 +12, V 13 13 13 COMMON-MODE REJECTION V = 10 V 60 72 70 76 60 72 dB CM T -T 60 72 68 76 60 72 dB MIN MAX INPUT VOLTAGE NOISE f = 10 kHz 19 19 19 nV/Hz Wideband Noise 10 Hz to 10 MHz 60 60 60 V rms OPEN LOOP GAIN V = 10 V O R 500 15 25 20 30 15 30 V/mV LOAD T -T 10 20 10 25 10 25 V/mV MIN MAX OUTPUT CHARACTERISTICS Voltage R 500 610 +11.5, 610 +11.5, 610 +11.5, V LOAD 12.6 12.6 12.6 Current V = 10 V 50 50 50 mA OUT Output Resistance Open Loop 12 12 12 FREQUENCY RESPONSE Unity Gain Bandwidth V = 90 mV p-p 34 34 34 MHz OUT 3 Full Power Bandwidth V = 20 V p-p O R1 500 2.5 3.9 2.5 3.9 2.5 3.9 MHz Rise Time A = 1 10 10 10 ns VCL Overshoot A = 1 15 15 15 % VCL Slew Rate A = 1 160 250 160 250 160 250 V/s VCL Settling Time 10 V Step A = 1 VCL to 0.1% 95 95 95 ns to 0.01% 135 135 135 ns Overdrive Recovery Overdrive 200 200 200 ns +Overdrive 700 700 700 ns Differential Gain f = 4.4 MHz 0.025 0.025 0.025 % Differential Phase f = 4.4 MHz 0.025 0.025 0.025 Degree POWER SUPPLY Rated Performance 15 15 15 V Operating Range 64.5 618 64.5 618 64.5 618 V Quiescent Current 12 13 12 13 12 13 mA T -T 12.3 14 12.3 14 12.5 16 mA MIN MAX Rejection Ratio 5 V to 18 V 65 76 70 80 65 76 dB Rejection Ratio T -T 62 76 68 80 62 76 dB MIN MAX TEMPERATURE RANGE Operating, Rated Performance Commercial (0C to +70C) AD843J AD843K Industrial (40C to +85C) AD843A AD843B 4 Military (55C to +125C) AD843S PACKAGE OPTIONS Plastic (N-8) AD843JN AD843KN Cerdip (Q-8) AD843AQ AD843BQ AD843SQ, AD843SQ/883B Metal Can (H-12A) AD843BH AD843SH, AD843SH/883B LCC (E-20A) AD843SE/883B SOIC (R-16) AD843JR16 Tape & Reel AD843JR-16REEL AD843JR-16REEL7 Chips AD843JCHIPS AD843SCHIPS 2 REV. 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