Features and Benefits
- Unity Gain Bandwidth: 34 MHz
- Fast Settling: 135 ns to 0.01%
- Slew Rate: 250 V/µs
- Input Offset Voltage: 1 mV max (AD843K/B)
- Input Bias Current: 0.6 nA typ
- Input Voltage Noise: 19 nV/vHz
- Open Loop Gain: 30 V/mV into a 500 Ω 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
- Chips and MIL-STD-883B Parts Also Available
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/µs slew rate and 0.6 nA input bias current of the AD843 ensure excellent performance in high speed sample-and-hold 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°C to +70°C. The AD843A and AD843B are rated over the industrial temperature range of -40°C to +85°C. The AD843S is rated over the military temperature range of -55°C to +125°C and is available processed to MIL-STD-883B, Rev. C.
Markets and Technologies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
MT-053: Op Amp Distortion: HD, THD, THD + N, IMD, SFDR, MTPR2/14/2015
MT-052: Op Amp Noise Figure: Don't Be Misled2/14/2015
MT-050: Op Amp Total Output Noise Calculations for Second-Order System2/14/2015
MT-049: Op Amp Total Output Noise Calculations for Single-Pole System2/14/2015
MT-048: Op Amp Noise Relationships: 1/f Noise, RMS Noise, and Equivalent Noise Bandwidth2/14/2015
MT-047: Op Amp Noise2/14/2015
MT-060: Choosing Between Voltage Feedback and Current Feedback Op Amps2/14/2015
MT-059: Compensating for the Effects of Input Capacitance on VFB and CFB Op Amps Used in Current-to-Voltage Converters2/14/2015
MT-033: Voltage Feedback Op Amp Gain and Bandwidth2/14/2015
MT-058: Effects of Feedback Capacitance on VFB and CFB Op Amps2/14/2015
MT-056: High Speed Voltage Feedback Op Amps2/3/2009
MT-032: Ideal Voltage Feedback (VFB) Op Amp12/11/2008
Tools & Simulations
AD843 SPICE Macro Models
Use the Analog Filter Wizard to design low-pass, high-pass, or band-pass filters with actual op amps in minutes. As you progress through the design process, you can observe the characteristics of your filter design from ideal specifications to real world circuit behavior. Quickly evaluate the tradeoffs in op amp specifications - including gain-bandwidth, noise, and supply current – to determine the best filter design for your requirements.
Use Photodiode Wizard to design a transimpedance amplifier circuit to interface with a photodiode. Select a photodiode from the library included in the tool, or enter custom photodiode specifications. Quickly observe tradeoffs between Bandwidth, Peaking (Q), and ENOB/SNR. Modify circuit parameters, and immediately see results in plots for pulse response, frequency response, and noise gain.
A utility to convert between standard units of power measurement and signal strength.
This tool estimates die temperature and power dissipation based on the supply voltages, ambient temperature, load characteristics, and package thermal data.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|5962-9098001M2A||Material Declaration||Reliability Data||20 ld LCC|
|5962-9098001MPA||Material Declaration||Reliability Data||8-Lead CerDIP|
|AD843AQ||Material Declaration||Reliability Data||14-Lead CerDIP|
|AD843BQ||Material Declaration||Reliability Data||8-Lead CerDIP|
|AD843JCHIPS||Material Declaration||Reliability Data||none available|
|AD843JNZ||Material Declaration||Reliability Data||8-Lead PDIP|
|AD843JRZ-16||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|AD843JRZ-16-REEL||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|AD843JRZ-16-REEL7||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|AD843KNZ||Material Declaration||Reliability Data||8-Lead PDIP|
|AD843SCHIPS||Material Declaration||Reliability Data||none available|
|AD843SQ||Material Declaration||Reliability Data||8-Lead CerDIP|
|AD843SQ/883B||Material Declaration||Reliability Data||8-Lead CerDIP|
|Wafer Fabrication Data|
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Sample & Buy
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