AD8634

RECOMMENDED FOR NEW DESIGNS

High Temperature, Low Noise, RRO Dual Operational Amplifier

Data Sheet (Rev. B) Product Selection Table

Part Models: 3
1ku List Price: Starting From $80.04

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Part Details

Extreme high temperature operation
−40°C to +210°C, FLATPACK package
−40°C to +175°C, SOIC package
Rail-to-rail output
Low power: 1.3 mA maximum
See data sheet for additional features
Download AD8634-KGD Data Sheet
Available As Known Good Die and fully guaranteed to data sheet specifications.

Part Models: 3
1ku List Price: Starting From $80.04

Documentation

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
AD8634-KGD-CHIP	CHIPS OR DIE	Material Declaration Reliablity Data	Ultra Librarian SamacSys
AD8634HFZ	8-Lead Flatpack	Material Declaration Reliablity Data	Ultra Librarian SamacSys
AD8634HRZN	8-Lead SOIC	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

LTspice 1

AD8634 - Operational Amplifiers (Op Amps)

Models for the following parts are available in LTspice:

AD8634

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.

Open Tool

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.

Open Tool

Signal Chain Designer - BETA

Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.

Open Tool

SPICE Model 1

AD8634 SPICE Macro Model

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.

Evaluation Kits

EVAL-OPAMP-2 Evaluation Board

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Product Details

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-2CPZ (dual 8-lead LFCSP) CP-8
EVAL-PRAOPAMP-2RMZ (dual 8-lead MSOP) RM-8
EVAL-PRAOPAMP-2RZ (dual 8-lead SOIC) R-8

200°C High Temperature Data Acquisition and Control System Reference Design

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Features and Benefits

Complete high temperature data acquisition reference platform with all components and assembly materials rated to at least 200°C
10 channels of high precision analog to digital conversion
- (2) Direct channels, 400ksps max
- (8) Multiplexed channels, 16ksps max (including temp sensor)
- Multiple GPIO for external control and optional external triggering
Complete software package including
- Optimized firmware with RTOS for multiple modes of data acquisition
- PC Host software for control, viewing and logging data
- Source code available for all software
Form factor compatible with downhole oil/gas exploration instrumentation
Kit includes analog and digital/power breakout boards for rapid evaluation

Product Details

EV-HT-200CDAQ1 builds on the CN0365 analog front end reference design from with the goal of providing a foundation for a high temperature, low power microcontroller-based data acquisition and control solution that meets the requirements for many downhole instrumentation and other high temperature applications. Based upon the AD7981 analog-to-digital SAR converter, this reference design demonstrates a full featured system with two high speed simultaneously sampled channels along with 8 additional multiplexed channels suitable for covering the acquisition requirements of a broad range of downhole tools (10 channels total). This analog front end is connected to the VORAGO Technologies VA10800 ARM® Cortex^®-M0 based microcontroller via multiple SPI ports. Once acquired, the data can be processed locally or transmitted via a UART or optional RS485 communications interface. Other supporting components on the board, including memory, clock, power and passives are all rated for high temperature operation by their respective suppliers and verified to operate reliably at 200°C or higher. In addition to the hardware, open source firmware is supplied for the project using FreeRTOS with optimized drivers and data acqusition protocol with multiple modes of operation. Open source PC software included allows the users to connect to the board via UART to control acquisition modes, view data, log data and perform signal analysis. This platform is suitable for reference design, rapid prototyping (such as new sensor techniques) and lab testing of high temperature instrumentation systems.