ADA4805-1
0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifier
Top
Overview
Features and Benefits
- Low input offset voltage:
125 μV (maximum) - Low input offset voltage drift
0.2 μV/°C (typical)
1.5 μV/°C (maximum) - Ultralow supply current:
495 μA/amplifier - Wide supply voltage range:
3 V to 10 V - High speed performance
−3 dB bandwidth: 105 MHz
Slew rate: 160 V/μs
0.1% settling time: 35 ns - Rail-to-rail outputs
- Input common-mode range:
−VS − 0.1 V to +VS − 1 V - Low noise: 5.9 nV/√Hz at 100 kHz; 0.6 pA/√Hz at 100 kHz
- Low distortion: −102 dBc/−116 dBc HD2/HD3 at 100 kHz
- Low input bias current:
470 nA (typical) - Dynamic power scaling
High speed turn-on time: 3 μs (maximum) fully settled - Small packaging
6-lead SC70, 6-lead SOT-23
Product Details
The ADA4805-1 is a high speed voltage feedback rail-to-rail output amplifier with an exceptionally low quiescent current of 495 μA, making it ideal for low power, high resolution data conversion systems. Despite being low power, this amplifier provides excellent overall performance. It offers a high bandwidth of 105 MHz at a gain of 1, high slew rate of 160 V/μs, and a low input offset voltage of 125 μV maximum.
A shutdown pin allows further reduction of the quiescent supply current to 3 μA. For power sensitive applications, the shutdown mode offers very fast turn-on time of 3 μs from shutdown to fully on (output settled to 16 bits). This allows the user to dynamically manage the power of the amplifier by turning the amplifier off between ADC samples.
The Analog Devices, Inc., proprietary extra fast complementary bipolar (XFCB) process allows for both low voltage and low current noise (5.9 nV/√Hz, 0.6 pA/√Hz). The ADA4805-1 operates over a wide range of supply voltages from ±1.5 V to ±5 V, as well as from single 3 V and 5 V supplies, making it ideal for high speed, low power instruments.
The ADA4805-1 amplifier is available in both a 6-lead SOT-23 and a 6-lead SC70 package. These amplifiers are rated to work over the industrial temperature range of −40°C to +125°C.
Applications
- High resolution, high precision ADC drivers
- Battery-powered instrumentation
- Micropower active filters
- Portable point of sales terminals
- Active RFID readers
- Photo multipliers
- ADC reference buffers
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
-
AN-1375: Output Current Monitoring of High Voltage Class D Amplifiers (Rev. 0)2/4/2016PDF182 K
-
AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)2/14/2015PDF299 kB
-
AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev. 0)2/14/2015PDF166 kB
-
MT-053: Op Amp Distortion: HD, THD, THD + N, IMD, SFDR, MTPR2/14/2015PDF104 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-056: High Speed Voltage Feedback Op Amps2/3/2009PDF109 kB
-
SAR ADC & Driver Quick-Match Guide9/13/2013PDF251 kB
-
CN0363: Dual-Channel Colorimeter with Programmable Gain Transimpedance Amplifiers and Digital Synchronous Detection (Rev. 0)7/12/2017PDF346 K
-
CN0372: Ultralow Power, General-Purpose, Multichannel Data Acquisition System with Energy Harvesting Circuit and Alert Function (Rev. 0)12/16/2015PDF419 K
-
Condition Monitoring System Design Choices and Their Impact on Signal Chain Implementation10/21/2021
-
Can You Really Get ppm Accuracies from Op Amps?7/17/2019 Analog Dialogue
-
Introduction to Dynamic Power Scaling1/1/2016
Tools & Simulations
LTspice
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.
Models for the following parts are available in LTspice:
ADA4805
Precision ADC Driver Tool
The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input
SPICE Models
CIR
ADA4805 SPICE Macro Model
7.37 K
Design Tools
OpAmp Error Budget Calculator
An online tool to illustrate range, gain and accuracy issues with Op Amp.
Reference Designs (2)
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.
Support & Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku 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. 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.