-
AD825: Low Cost, General-Purpose High Speed JFET Amplifier Data Sheet (Rev. G)10/31/1997PDF407 kB
Overview
Features and Benefits
- High Speed
41 MHz, -3 dB bandwidth
125 V/µs slew rate
80 ns settling time - Input bias current of 20 pA and noise
current of 10 fA/√Hz - Fully specified power supplies: ±5 V to ±15V
- Input voltage noise of 12 nV/√Hz
- Low distortion: -76 dB at 1 MHz
- High output drive capability
Drives unlimited capacitance load
50 mA min output current - No phase reversal when input is
at rail - Available in 8-lead SOIC
Product Details
The AD825 is a superbly optimized operational amplifier for high speed, low cost and dc parameters, making it ideally suited for a broad range of signal conditioning and data acquisition applications. The ac performance, gain, bandwidth, slew rate and drive capability are all very stable over temperature. The AD825 also maintains stable gain under varying load conditions.
The unique input stage has ultralow input bias current and input current noise. Signals that go to either rail on this high performance input do not cause phase reversals at the output. These features make the AD825 a good choice as a buffer for MUX outputs, creating minimal offset and gain errors.
The AD825 is fully specified for operation with dual ±5 V and ±15 V supplies. This power supply flexibility, and the low supply current of 6.5 mA with excellent ac characteristics under all supply conditions, makes the AD825 well suited for many demanding applications.
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)
Documentation & Resources
-
AN-402: Replacing Output Clamping Op Amps with Input Clamping Amps2/14/2015PDF55 kB
-
AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev. 0)2/14/2015PDF166 kB
-
AN-356: User's Guide to Applying and Measuring Operational Amplifier Specifications2/14/2015PDF538 kB
-
AN-214: Ground Rules for High Speed Circuits2/14/2015PDF356 kB
-
AN-108: JFET-Input Amps are Unrivaled for Speed and Accuracy2/14/2015PDF499 kB
-
UG-755: 8-Lead SOIC Amplifier Evaluation Board User Guide (Rev. A)4/14/2015PDF248 K
-
MT-053: Op Amp Distortion: HD, THD, THD + N, IMD, SFDR, MTPR2/14/2015PDF104 kB
-
MT-052: Op Amp Noise Figure: Don't Be Misled2/14/2015PDF60 kB
-
MT-050: Op Amp Total Output Noise Calculations for Second-Order System2/14/2015PDF38 kB
-
MT-049: Op Amp Total Output Noise Calculations for Single-Pole System2/14/2015PDF40 kB
-
MT-048: Op Amp Noise Relationships: 1/f Noise, RMS Noise, and Equivalent Noise Bandwidth2/14/2015PDF81 kB
-
MT-047: Op Amp Noise2/14/2015PDF72 kB
-
MT-060: Choosing Between Voltage Feedback and Current Feedback Op Amps2/14/2015PDF62 kB
-
MT-033: Voltage Feedback Op Amp Gain and Bandwidth2/14/2015PDF251 kB
-
MT-058: Effects of Feedback Capacitance on VFB and CFB Op Amps2/14/2015PDF66 kB
-
MT-056: High Speed Voltage Feedback Op Amps2/3/2009PDF109 kB
-
MT-032: Ideal Voltage Feedback (VFB) Op Amp12/11/2008PDF65 kB
Tools & Simulations
SPICE Models
AD825 SPICE Macro Models
Design Tools
Analog Filter Wizard
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.
Analog Photodiode Wizard
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.
VRMS/dBm/dBu/dBV calculators
A utility to convert between standard units of power measurement and signal strength.
Power Dissipation vs Die Temp
This tool estimates die temperature and power dissipation based on the supply voltages, ambient temperature, load characteristics, and package thermal data.
Design Resources
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.
PCN-PDN Information
Sample & Buy
See our Ordering FAQs for answers to questions about online orders, payment options and more.
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.