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AD8251
PRODUCTION10 MHz, G = 1, 2, 4, 8 iCMOS® Programmable Gain Instrumentation Amplifier
- Part Models
- 3
- 1ku List Price
- Starting From $5.90
Part Details
- Small package: 10-lead MSOP
- Programmable gains: 1, 2, 4, 8
- Digital or pin-programmable gain setting
- Wide supply: ±5 V to ±15 V
- Excellent dc performance
High CMRR: 98 dB (minimum), G = 8
Low gain drift: 10 ppm/°C (maximum)
Low offset drift: 1.8 μV/°C (maximum), G = 8
EXCELLENT AC PERFORMANCE
- Fast settling time: 785 ns to 0.001% (maximum)
- High slew rate: 20 V/μs (minimum)
- Low distortion: −110 dB THD at 1 kHz,10 V swing
- High CMRR over frequency: 80 dB to 50 kHz (minimum)
- Low noise: 18 nV/√Hz, G = 10 (maximum)
- Low power: 4 mA
The AD8251 is an instrumentation amplifier with digitally programmable gains that has GΩ input impedance, low output noise, and low distortion, making it suitable for interfacing with sensors and driving high sample rate analog-to-digital converters (ADCs). It has high bandwidth of 10 MHz, low THD of −110 dB, and fast settling time of 785 ns (maximum) to 0.001%. Offset drift and gain drift are guaranteed to 1.8 μV/°C and 10 ppm/°C, respectively, for G = 8. In addition to its wide input common voltage range, it boasts a high common-mode rejection of 80 dB at G = 1 from dc to 50 kHz. The combination of precision dc performance coupled with high speed capabilities makes the AD8251 an excellent candidate for data acquisition. Furthermore, this monolithic solution simplifies design and manufacturing and boosts performance of instrumentation by maintaining a tight match of internal resistors and amplifiers.
The AD8251 user interface consists of a parallel port that allows users to set the gain in one of two different ways (see Figure 1 in data sheet for the functional block diagram). A 2-bit word sent via a bus can be latched using the WR input. An alternative is to use transparent gain mode where the state of logic levels at the gain port determines the gain.
The AD8251 is available in a 10-lead MSOP package and is specified over the −40°C to +85°C temperature range, making it an excellent solution for applications where size and packing density are important considerations.
Applications
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Technical Articles 2
3rd Party Solutions 3
Circuit Note 3
Technical Book 1
Analog Dialogue 4
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 |
|---|---|---|---|
| AD8251ARMZ | 10-Lead MSOP | ||
| AD8251ARMZ-R7 | 10-Lead MSOP | ||
| AD8251ARMZ-RL | 10-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 15, 2012 - 10_0006 Halogen Free Material Change for mini SOIC Products |
||
| AD8251ARMZ | PRODUCTION | |
| AD8251ARMZ-R7 | PRODUCTION | |
| AD8251ARMZ-RL | PRODUCTION | |
|
Nov 16, 2009 - 06_0157 Qualification of the 8" H6 Thin Film BiPolar Wafer Fab Process at Analog Devices, Limerick, Ireland |
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| AD8251ARMZ | PRODUCTION | |
| AD8251ARMZ-R7 | PRODUCTION | |
|
Sep 11, 2009 - 09_0146 Die revision of the AD8250, AD8251 and the AD8253 to include Polyimide coating |
||
| AD8251ARMZ | PRODUCTION | |
| AD8251ARMZ-R7 | PRODUCTION | |
| AD8251ARMZ-RL | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
In-Amp Diamond Plot Tool
The Diamond Plot Tool is a web application that generates a configuration-specific Output Voltage Range vs. Input Common-Mode Voltage graph, also known as the Diamond Plot, for Analog Devices Instrumentation Amplifiers. Based on user inputs such as supply voltage, gain, and input signal range, the tool detects saturation and recommends in-amps for which the input signal is in-range and the configuration is valid. Avoid saturation, find the best in-amp for your design, and save time.
Open ToolSPICE Model 1
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 ToolEvaluation Kits
AD8251 Evaluation Board
Resources
High-Performance Precision Impedance Analyzer Measurement Module
Resources
Software
Reference Designs
Isolated, Multichannel Data Acquisition System with PGIA for Single-Ended and Differential Industrial Level Signals
Part Used
Design & Integration Tools
Low Power, Multichannel Data Acquisition System with PGIA for Single-Ended and Differential Industrial-Level Signals
Part Used
Design & Integration Tools
Bank Isolated, 2-Channel, 16-Bit, 500 kSPS, Simultaneous Sampling Signal Chain Featuring μModule Data Acquisition System
Part Used
Design & Integration Tools
Videos
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Reducing Challenges in the Precision Conversion Design Cycle
