ADA4625-2

RECOMMENDED FOR NEW DESIGNS

ADA4625-2

36 V, 18 MHz, Low Noise, Fast Settling Single Supply, RRO, JFET Op Amp

RECOMMENDED FOR NEW DESIGNS

RECOMMENDED FOR NEW DESIGNS

ADA4625-2 Pin Configuration slide

ADA4625-2 Pin Configuration slide

ADA4625-2 Pin Configuration

ADA4625-2 Pin Configuration

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Part Models 3

1ku List Price Starting From $5.87

Features

Wide gain bandwidth product: 18 MHz typical
High slew rate: 48 V/µs typical
Low voltage noise density: 3.3 nV/√Hz typical at 1 kHz
Low peak-to-peak noise: 0.15 µV p-p, 0.1 Hz to 10 Hz
Low input bias current: ±15 pA typical at T_A = 25°C
Low offset voltage: ±80 µV maximum at T_A = 25°C
Offset voltage drift: ±1.2 µV/°C maximum at T_A = −40°C to 85°C

Fast settling: 0.01% in 700 ns typical
Wide range of operating voltages
- Dual-supply operation: ±2.5 V to ±18 V
- Single-supply operation: 5 V to 36 V
Input voltage range includes V−
Rail-to-rail output
High capacitive load drive capability
Output short-circuit current: ±46 mA
No phase reversal
Unity-gain stable

Additional Details

The ADA4625-1/ADA4625-2 build on Analog Devices, Inc., high voltage, single-supply, rail-to-rail output (RRO), precision junction field effect transistor (JFET) input op amps, taking that product type to a level of speed and low noise that has not been made available to the market previously.

The ADA4625-1/ADA4625-2 provide optimal performance in high voltage, high gain, and low noise applications. The input common-mode voltage range includes the negative supply, and the output swings rail to rail. This enables the user to maximize dynamic input range in low voltage, single supply applications without the need for a separate negative voltage power supply for ground sense.

The combination of wide bandwidth, low noise, and low input bias current makes the ADA4625-1/ADA4625-2 especially suitable for phase-locked loop (PLL), active filter amplifiers and for high tuning voltage (V_TUNE), voltage controlled oscillators (VCOs) and preamplifiers where low level signals require an amplifier that provides both high amplification and wide bandwidth.

The ADA4625-1/ADA4625-2 are unity-gain stable, and there is no phase reversal when input range exceeds either supply rail by 200 mV. The output is capable of driving loads up to 1000 pF and/or 600 Ω loads.

The ADA4625-1/ADA4625-2 are specified for operation over the extended industrial temperature range of −40°C to +125°C and operates from +5 V to +36 V (±2.5 V to ±18 V) with specifications at +5 V and ±18 V. The devices are available in an 8-lead SOIC package with an exposed pad (EPAD).

Applications

PLL filter amplifiers
Transimpedance amplifiers
Photodiode sensor interfaces
Low noise charge amplifiers

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Part Models 3

1ku List Price Starting From $5.87

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Technical Documents 3

ADA4625-1/ADA4625-2: 36 V, 18 MHz, Low Noise, Fast Settling Single Supply, RRO, JFET Op Amp Data Sheet (Rev.A) 10/30/2017

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UG-1481: EVAL-ADA4625-2ARDZ User Guide (Rev.0) 06/20/2019

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AN-202: An IC Amplifier User’s Guide to Decoupling, Grounding, and Making Things Go Right for a Change (Rev.B) 02/14/2015

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Reference Materials 3

Fully Differential Amplifier Provides High Voltage and Low Noise Signal to Precision Data Acquisition Signal Chain 05/15/2024

Current Noise in FET Input Amps 02/01/2020

Video

1

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Video

2019-10-03

01:00

ADA4625-2 Dual-Channel, 36V, JFET Input Operational Amplifier

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Design Resources 3

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
ADA4625-2ARDZ	8-Lead SOIC w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADA4625-2ARDZ-R7	8-Lead SOIC w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADA4625-2ARDZ-RL	8-Lead SOIC w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

ADA4625-2ARDZ
Pin/Package Drawing
8-Lead SOIC w/ EP
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADA4625-2ARDZ-R7
Pin/Package Drawing
8-Lead SOIC w/ EP
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADA4625-2ARDZ-RL
Pin/Package Drawing
8-Lead SOIC w/ EP
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

Circuit Recommendations 2

image of circuit card

Transimpedance Amplifier Photodiode

LTspice Simulation

image of circuit card

Sensitive Photodiode Amplifier

LTspice Simulation

reference details image

EVAL-ADA4625-2

ADA4625-2 Evaluation Board

EVAL-ADA4625-2ARDZ

EVAL-ADA4625-2ARDZ

EVAL-ADA4625-2ARDZ

ADA4625-2 Evaluation Board

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EVAL-ADA4625-2ARDZ

EVAL-ADA4625-2ARDZ

EVAL-ADA4625-2ARDZ

EVAL-ADA4625-2ARDZ

EVAL-ADA4625-2ARDZ

EVAL-ADA4625-2ARDZ

EVAL-ADA4625-2

ADA4625-2 Evaluation Board

Features and Benefits

Full featured evaluation board for the ADA4625-2
Enables quick prototyping
User defined circuit configuration
Edge mounted SMA connector provisions
Easy connection to test equipment and other circuits

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Product Detail

The evaluation board for the ADA4625-2 is a low noise, fast settling, single-supply, rail-to-rail output (RRO), junction field effect transistor (JFET) op amp in an 8-lead small outline integrated circuit (SOIC) package with an exposed pad.

The design of this evaluation board emphasizes simplicity and ease of use. This evaluation board is a two layer board that accommodates edge mounted Subminiature Version A (SMA) connectors on the inputs and outputs. The SMA connectors provide efficient connection to test equipment or other circuitry.

The evaluation board ground plane, component placement, and power supply bypassing are optimized for maximum circuit flexibility and performance. The exposed pad of the ADA4625-2 is connected to the ground plane on the evaluation board to enhance thermal and noise performance. The evaluation board uses a combination of surface mount technology (SMT) component case size 0603, with the exception of the C2 and C6 bypass capacitors, which have a maximum standard size of 1206. The evaluation board features a variety of unpopulated resistor and capacitor pads that provide the user with multiple choices and extensive flexibility for different application circuits and configurations, such as active loop filters, transimpedance amplifiers (TIAs), and charge amplifiers.

Consult the ADA4625-2 data sheet for full details. The data sheet must be used in conjunction with this user guide when using the evaluation board.

Resources

PDF

UG-1481: EVAL-ADA4625-2ARDZ User Guide (Rev.0)

285.73 K

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evaluation kit item images

EVAL-ADA4625-2

ADA4625-2 Evaluation Board

LTspice 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Lt Spice

ADA4625-2 - Operational Amplifiers (Op Amps)

Analog Photodiode Wizard

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.

Analog Filter Wizard

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.

Signal Chain Designer - BETA

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.

SPICE Model 1

Simulation Model

SPICE Model

ADA4625-1/ADA4625-2 SPICE Macro Model

5.43 KB

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