AD843 General 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% of final value for a 10 volt step). The AD843 is a member of the Analog Devices' family of wide bandwidth operational amplifiers. These devices are fabricated using Analog Devices'junction isolated complementary bipolar (CB) process. This process permits a combination of dc precision and wideband ac performance previously unobtainable in a monolithic op amp.
The 250 /ms slew rate and 0.6 nA input bias current of the AD843 ensure excellent performance in high speed sample-andhold applications and in high speed integrators. This amplifier is also ideally suited for high bandwidth active filters and high frequency signal conditioning circuits.
Unlike many high frequency amplifiers, the AD843 requires no external compensation and it remains stable over its full operating temperature range. It is available in five performance grades: the AD843J and AD843K are rated over the commercial temperature range of 0 to +70. The AD843A and AD843B are rated over the industrial temperature range of 40 to +85. The AD843S is rated over the military temperature range of 55 to +125 and is available processed to MIL-STD-883B, Rev. C. 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% of final value for a 10 volt step). The AD843 is a member of the Analog Devices' family of wide bandwidth operational amplifiers. These devices are fabricated using Analog Devices' junction isolated complementary bipolar (CB) process. This process permits a combination of dc precision and wideband ac performance previously unobtainable in a monolithic op amp.
The 250 V/ms slew rate and 0.6 nA input bias current of the AD843 ensure excellent performance in high speed sample-andhold applications and in high speed integrators. This amplifier is also ideally suited for high bandwidth active filters and high frequency signal conditioning circuits.
Unlike many high frequency amplifiers, the AD843 requires no external compensation and it remains stable over its full operating temperature range. It is available in five performance grades: the AD843J and AD843K are rated over the commercial temperature range of 0 to +70. The AD843A and AD843B are rated over the industrial temperature range of 40 to +85.
The AD843S is rated over the military temperature range of 55 to +125°C and is available processed to MIL-STD-883B, Rev. C.
AD843 Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±18 V
Internal Power Dissipation2
Plastic Package . . . . . . . . . . . . . . . . . . . . . . . . . . 1.50 Watts
Cerdip Package . . . . . . . . . . . . . . . . . . . . . . . . . . 1.35 Watts
12-Pin Header Package . . . . . . . . . . . . . . . . . .. . 1.80 Watts
16-Pin SOIC Package . . . . . . . . . . . . . . . . . . . . . 1.50 Watts
20-Pin LCC Package . . . . . . . . . . . . . . . . . . . . . . . 1.00 Watt
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±VS
Output Short Circuit Duration . . . . . . . . . . . . .. . . . Indefinite
Differential Input Voltage . . . . . . . . . . . . . . . .. . +VS and VS
Storage Temperature Range (N, R) . . . . . . . 65 to +125
Storage Temperature Range (Q, H, E) . . . . . 65 to +150
Operating Temperature Range
AD843J/R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70
AD843A/B . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 to +85
AD843S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to +125
Lead Temperature Range (Soldering 60 sec) . . . . . . . . +300
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 V
AD843 Features
`AC PERFORMANCE
`Unity Gain Bandwidth: 34 MHz
`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/
`Open Loop Gain: 30 V/mV into a 500 Load
`Output Current: 50 mA min
`Supply Current: 13 mA max
`Available in 8-Pin Plastic Mini-DIP & Cerdip, 16-Pin SOIC, 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
AD843 Typical Application
·High Speed Sample-and-Hold Amplifiers
·High Bandwidth Active Filters
·High Speed Integrators
·High Frequency Signal Conditioning
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