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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
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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
Application Notes (4)
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:
Precision ADC Driver Tool - BETA
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
Design Tools
An online tool to illustrate range, gain and accuracy issues with Op Amp.
Reference Designs (2)
Reference Materials
Product Selection Guide (1)
Instrumentation and High Speed: LVDS, Energy Harvesting and more
High Speed ADC Driver Delivers High Accuracy at Very Low Power
Technical Articles (1)
Analog Dialogue (1)
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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.
Discussions
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Sample & Buy
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.
