Features and Benefits
- High speed
850 MHz, -3 dB bandwidth (G = +1, RL = 1kΩ), LFSCP
750 MHz, −3 dB bandwidth (G = +1, RL = 1 kΩ, SOIC)
2800 V/µs slew rate
- Low distortion:
-88 dBc @ 10 MHz (G = +1, RL = 1kΩ)
- Low power: 5 mA/amplifier @ 10 V
- Low noise: 4.4 nV/√Hz
- Wide supply voltage range: 5 V to 10 V
- Power-down feature
- Available in 3 mm × 3 mm 8-lead LFCSP (single), 8-lead SOIC (single), and 4 mm × 4 mm 16-lead LFCSP (dual)
Product DetailsThe ADA4857 is a unity gain stable, high speed, voltage feedback amplifier with low distortion, low noise, and high slew rate. With a spurious-free dynamic range (SFDR) of −88 dBc @ 10 MHz, the ADA4857 is an ideal solution for a variety of applications including ultrasounds, ATE, active filters, and ADC drivers. The Analog Devices, Inc., proprietary next-generation XFCB process and innovative architecture enables such high performance amplifiers.
The ADA4857 has 850 MHz bandwidth, 2800 V/μs slew rate, and settles to 0.1% in 15 ns. With a wide supply voltage range (5 V to 10 V), the ADA4857 is an ideal candidate for systems that require high dynamic range, precision, and speed.
The ADA4857-1 amplifier is available in a 3 mm × 3 mm, 8-lead LFCSP and a standard 8-lead SOIC. The ADA4857-2 is available in a 4 mm × 4 mm, 16-lead LFSCP. The LFCSP features an exposed paddle that provides a low thermal resistance path to the printed circuit board (PCB). This path enables more efficient heat transfer and increases reliability. The ADA4857 works over the extended industrial temperature range (−40°C to +125°C).
- IF and baseband amplifiers
- Active filters
- ADC drivers
- DAC buffers
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.
Evaluation Kits (1)
These evaluation boards are designed to help users evaluate the ADA4857-2. The evaluation board is a BARE BOARD. There are no components or amplifiers soldered to the board. These parts must be obtained separately from the table below or on the product page. Free samples may also be requested. The unpopulated board enables users to quickly customize and prototype a variety of op amp circuits, which minimizes risk and reduces time to market.
The User Guide contains all the required documentation to build the board, including schematics, assembly drawing, and Bill of Materials
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
SAR ADC & Driver Quick-Match Guide9/13/2013
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
Precision ADC Driver Tool
The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input
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|
|ADA4857-2YCPZ-R7||Material Declaration||Reliability Data||16-Lead LFCSP (4mm x 4mm w/ EP)|
|ADA4857-2YCPZ-RL||Material Declaration||Reliability Data||16-Lead LFCSP (4mm x 4mm w/ EP)|
|Wafer Fabrication Data|
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Sample & Buy
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Buy Now Pricing
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.