AD8508

PRODUCTION

20 µA Maximum, RRIO, Zero Input Crossover Distortion Quad Op Amp

Data Sheet (Rev. F) Product Selection Table

Part Models: 3
1ku List Price: Starting From $1.20

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Overview

PSRR: 100 dB minimum
CMRR: 105 dB typical
Very low supply current: 20 μA per amplifier maximum
1.8 V to 5 V single supply or ±0.9 V to ±2.5 V dual supply

Rail-to-rail input/output
Low noise: 45 nV/√Hz at 1 kHz
2.5 mV offset voltage maximum
Very low input bias current: 1 pA typical

The AD8505/AD8506/AD8508 are single, dual, and quad micro-power amplifiers featuring rail-to-rail input/output swings while operating from a single 1.8 V to 5 V power supply or from dual ±0.9 V to ±2.5 V power supplies. Using a new circuit technology, these amplifiers offer zero input crossover distortion (excellent PSRR and CMRR performance) and low bias current while operating with a supply current of less than 20 μA per amplifier. This amplifier family offers the lowest noise in its power class.

This combination of features makes the AD8505/AD8506/AD8508 amplifiers ideal choices for battery-powered applications because they minimize errors due to power supply voltage variations over the lifetime of the battery and maintain high CMRR even for a rail-to-rail input op amp. Remote battery-powered sensors, handheld instrumentation, consumer equipment, hazard detection (for example, smoke, fire, and gas), and patient monitors can benefit from the features of the AD8505/AD8506/AD8508 amplifiers.

The AD8505/AD8506/AD8508 are specified for both the industrial temperature range of −40°C to +85°C and the extended industrial temperature range of −40°C to +125°C. The AD8505 single amplifier is available in a tiny 5-lead SOT-23 package. The AD8506 dual amplifier is available in 8-lead MSOP and 8-ball WLCSP packages. The AD8508 quad amplifier is available in 14-lead TSSOP and 14-ball WLCSP packages. The AD8505/AD8506/AD8508 are members of a growing series of zero crossover distortion op amps offered by Analog Devices, Inc., including the ADA4505-1/ ADA4505-2/ADA4505-4, that operate from a single 1.8 V to 5 V supply or from dual ±0.9 V to ±2.5 V power supplies.

Applications

Pressure and position sensors
Remote security
Bio sensors
IR thermometers
Battery-powered consumer equipment
Hazard detectors

Part Models: 3
1ku List Price: Starting From $1.20

Documentation

Data Sheet 1

AD8505/AD8506/AD8508: 20 μA Maximum, Rail-to-Rail I/O, Zero Input Crossover Distortion Amplifiers Data Sheet (Rev.F) 05/28/2010

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
AD8508ACBZ-REEL7	14-Ball WLCSP (1.46mm x 2.96mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD8508ARUZ	14-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD8508ARUZ-REEL	14-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 28, 2012 - 11_0175 Shipping Changes for WLCSP Products with 8mm Carrier Tape Width
		PCN11_0175_Form Material_Report Qualification Report Summary Detailed Parts List
AD8508ACBZ-REEL7	PRODUCTION
Feb 11, 2011 - 10_0005 Halogen Free Material Change for TSSOP Products Assembled at Amkor
		PCN10_0005_Form Material_Report Reliability Report
AD8508ARUZ	PRODUCTION
AD8508ARUZ-REEL	PRODUCTION

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

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

AD8508

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

Signal Chain Designer

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

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

SPICE Model 1

AD8508 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-4 Evaluation Board

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Product Details

The Universal Precision Op Amp Evaluation Boards has 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.