AD8655/AD8656: Low Noise, Precision CMOS Amplifier Data Sheet (Rev. E)9/28/2006323 kB
Features and Benefits
- Low Noise: 2.7 nV/√rHz @ f = 10 kHz
- Low offset voltage: 250 μV max over Vcm
- Low Distortion: 0.0008%
- Offset voltage drift: 0.4 μV/°C typ and 2.3 μV/°C max
- Bandwidth: 28 MHz
- Rail-to-rail Input/Output
- Unity Gain Stable
- 2.7 V to 5.5 V Operation
- −40°C to +125°C Operation
- Qualified for automotive applications
The AD8655/AD8656 are the industry’s lowest noise, precision CMOS amplifiers. They leverage the Analog Devices DigiTrim® technology to achieve high dc accuracy.
The AD8655/AD8656 provide low noise (2.7 nV/√Hz at 10 kHz), low THD + N (0.0007%), and high precision performance (250 μV max over VCM) to low voltage applications. The ability to swing rail-to-rail at the input and output enables designers to buffer analog-to-digital converters (ADCs) and other wide dynamic range devices in single-supply systems.
The high precision performance of the AD8655/AD8656 improves the resolution and dynamic range in low voltage applications. Audio applications, such as microphone pre-amps and audio mixing consoles, benefit from the low noise, low distortion, and high output current capability of the AD8655/AD8656 to reduce system level noise performance and maintain audio fidelity. The high precision and rail-to-rail input and output of the AD8655/ AD8656 benefit data acquisition, process controls, and PLL filter applications.
The AD8655/AD8656 are fully specified over the −40°C to +125°C temperature range. The AD8655/AD8656 are available in Pb-free, 8-lead MSOP and SOIC packages. The AD8655/ AD8656 are both available for automotive applications.
- ADC and DAC buffers
- Industrial controls
- Precision Filters
- Digital Scales
- Automotive collision avoidance
- PLL filters
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.
Evaluation Kits (1)
The Universal Precision Op Amp Evaluation Boards have been designed and optimized for many circuit configurations allowing the users to best suit their applications. These boards are all RoHs Compliant. See references below on what board to order by lead count and package.
- EVAL-PRAOPAMP-1KSZ (Single 5-Lead SC70) KS-5
- EVAL-PRAOPAMP-1RJZ (Single 5-Lead SOT 23) RJ-5
- EVAL-PRAOPAMP-1RMZ (Single 8-Lead MSOP) RM-8
- EVAL-PRAOPAMP-1RZ (Single 8-Lead SOIC) R-8
Documentation & Resources
SAR ADC & Driver Quick-Match Guide9/13/2013251 kB
High-Side Current Sensing with Wide Dynamic Range: Three Solutions12/1/2010 Analog Dialogue
MS-2066: Low Noise Signal Conditioning for Sensor-Based Circuits11/1/2010425 kB
Difference Amplifier Forms Heart of Precision Current Source9/1/2009 Analog Dialogue
Current Noise in FET Input Amps2/1/2020
Tools & Simulations
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.
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|
|AD8655ARMZ||Material Declaration||Reliability Data||8-Lead MSOP|
|AD8655ARMZ-REEL||Material Declaration||Reliability Data||8-Lead MSOP|
|AD8655ARZ||Material Declaration||Reliability Data||8-Lead SOIC|
|AD8655ARZ-REEL||Material Declaration||Reliability Data||8-Lead SOIC|
|AD8655ARZ-REEL7||Material Declaration||Reliability Data||8-Lead SOIC|
|AD8655WARMZ-RL||Material Declaration||Reliability Data||8-Lead MSOP|
|Wafer Fabrication Data|
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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.