AD8421BRZ datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > Analog mixed-signal IC> Amplifier circuit> AD8421BRZ

AD8421BRZ: DescriptionInstrumentation Amplifiers 3nV/Hz Low Power; CategoryAnalog mixed-signal IC Amplifier circuit; File Size631KB，28 Pages; ManufacturerADI; Websitehttps://www.analog.com; Environmental Compliance

Download Datasheet Download user manual Parametric Compare View All

AD8421BRZ Online Shopping

Suppliers	Part Number	Price	MOQ	In stock
	AD8421BRZ	-	-	View	Buy Now

AD8421BRZ Overview

Instrumentation Amplifiers 3nV/Hz Low Power

AD8421BRZ Parametric

Parameter Name	Attribute value
Source Url Status Check Date	2013-05-01 14:56:26.341
Brand Name	Analog Devices Inc
Is it lead-free?	Contains lead
Is it Rohs certified?	conform to
Maker	ADI
package instruction	SOP, SOP8,.25
Contacts	8
Manufacturer packaging code	R-8
Reach Compliance Code	compliant
ECCN code	EAR99
Samacsys Description	Instrumentation Amplifier LowNoise SOIC8 Analog Devices AD8421BRZ, Instrumentation Amplifier, 25μV Offset 10MHz, R-RI, 5 → 36 V, 8-Pin SOIC
Amplifier type	INSTRUMENTATION AMPLIFIER
Maximum average bias current (IIB)	0.006 µA
Nominal bandwidth (3dB)	10 MHz
Minimum Common Mode Rejection Ratio	93 dB
Maximum input offset current (IIO)	0.0008 µA
Maximum input offset voltage	45 µV
JESD-30 code	R-PDSO-G8
JESD-609 code	e3
length	4.9 mm
Humidity sensitivity level	1
Negative supply voltage upper limit	-18 V
Nominal Negative Supply Voltage (Vsup)	-15 V
maximum nonlinearity	0.005%
Number of functions	1
Number of terminals	8
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP8,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260
power supply	+-2.5/+-18/5/36 V
Certification status	Not Qualified
Maximum seat height	1.75 mm
Nominal slew rate	35 V/us
Maximum slew rate	2.6 mA
Supply voltage upper limit	18 V
Nominal supply voltage (Vsup)	15 V
surface mount	YES
technology	BIPOLAR
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
Maximum voltage gain	10000
Minimum voltage gain	1
Nominal voltage gain	10
width	3.9 mm

User Manual

【User Guides】UG-1007: Using the EVAL-ADuM5411EBZ Evaluation Board with iCoupler Quad-Channel Isolators and Integrated DC-to-DC Conver

Preview

Download Datasheet

View All

Data Sheet

FEATURES

Low power

2.3 mA maximum supply current

Low noise

3.2 nV/√Hz maximum input voltage noise at 1 kHz

200 fA/√Hz current noise at 1 kHz

Excellent ac specifications

10 MHz bandwidth (G = 1)

2 MHz bandwidth (G = 100)

0.6 μs settling time to 0.001% (G = 10)

80 dB CMRR at 20 kHz (G = 1)

35 V/μs slew rate

High precision dc performance (AD8421BRZ)

94 dB CMRR minimum (G = 1)

0.2 μV/°C maximum input offset voltage drift

1 ppm/°C maximum gain drift (G = 1)

500 pA maximum input bias current

Inputs protected to 40 V from opposite supply

±2.5 V to ±18 V dual supply (5 V to 36 V single supply)

Gain set with a single resistor (G = 1 to 10,000)

3 nV/√Hz, Low Power

Instrumentation Amplifier

AD8421

PIN CONNECTION DIAGRAM

–IN

+IN

AD8421

OUT

REF

–V

10123-001

TOP VIEW

(Not to Scale)

Figure 1.

10µ

TOTAL NOISE DENSITY AT 1kHz (V/√Hz)

G = 100

BEST AVAILABLE

7mA LOW NOISE IN-AMP

1µ

100n

APPLICATIONS

Medical instrumentation

Precision data acquisition

Microphone preamplification

Vibration analysis

Multiplexed input applications

ADC driver

10n

BEST AVAILABLE

1mA LOW POWER IN-AMP

AD8421

NOISE ONLY

10k

100k

10123-078

100

SOURCE RESISTANCE, R

(Ω)

Figure 2. Noise Density vs. Source Resistance

GENERAL DESCRIPTION

The

AD8421

is a low cost, low power, extremely low noise, ultralow

bias current, high speed instrumentation amplifier that is ideally

suited for a broad spectrum of signal conditioning and data

acquisition applications. This product features extremely high

CMRR, allowing it to extract low level signals in the presence of

high frequency common-mode noise over a wide temperature

range.

The 10 MHz bandwidth, 35 V/μs slew rate, and 0.6 μs settling

time to 0.001% (G = 10) allow the

AD8421

to amplify high speed

signals and excel in applications that require high channel count,

multiplexed systems. Even at higher gains, the current feedback

architecture maintains high performance; for example, at G = 100,

the bandwidth is 2 MHz and the settling time is 0.8 μs. The

AD8421

has excellent distortion performance, making it suitable

for use in demanding applications such as vibration analysis.

The

AD8421

delivers 3 nV/√Hz input voltage noise and

200 fA/√Hz current noise with only 2 mA quiescent current,

making it an ideal choice for measuring low level signals. For

applications with high source impedance, the

AD8421

employs

innovative process technology and design techniques to provide

noise performance that is limited only by the sensor.

The

AD8421

uses unique protection methods to ensure robust

inputs while still maintaining very low noise. This protection

allows input voltages up to 40 V from the opposite supply rail

without damage to the part.

A single resistor sets the gain from 1 to 10,000. The reference

pin can be used to apply a precise offset to the output voltage.

The

AD8421

is specified from −40°C to +85°C and has typical

performance curves to 125°C. It is available in 8-lead MSOP

and SOIC packages.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

AD8421

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Pin Connection Diagram ................................................................ 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

AR and BR Grades........................................................................ 3

ARM and BRM Grades................................................................ 5

Absolute Maximum Ratings............................................................ 8

Thermal Resistance ...................................................................... 8

ESD Caution.................................................................................. 8

Pin Configuration and Function Descriptions............................. 9

Typical Performance Characteristics ........................................... 10

Theory of Operation ...................................................................... 20

Architecture................................................................................. 20

Data Sheet

Gain Selection............................................................................. 20

Reference Terminal .................................................................... 21

Input Voltage Range................................................................... 21

Layout .......................................................................................... 21

Input Bias Current Return Path ............................................... 22

Input Voltages Beyond the Supply Rails.................................. 22

Radio Frequency Interference (RFI)........................................ 23

Calculating the Noise of the Input Stage................................. 23

Applications Information .............................................................. 25

Differential Output Configuration .......................................... 25

Driving an ADC ......................................................................... 26

Outline Dimensions ....................................................................... 27

Ordering Guide .......................................................................... 27

REVISION HISTORY

5/12—Revision 0: Initial Version

Rev. 0 | Page 2 of 28

AD8421BRZ Related Products

	AD8421BRZ	AD8421BRMZ-RL	AD8421ARZ	AD8421BRZ-RL	AD8421BRMZ-R7	AD8421BRMZ
Description	Instrumentation Amplifiers 3nV/Hz Low Power	Instrumentation Amplifiers 3nV/Hz Low Power	Instrumentation Amplifiers 3nV/Hz Low Power	Instrumentation Amplifiers 3nV/Hz Low Power	Instrumentation Amplifiers 3nV/Hz Low Power	Instrumentation Amplifiers 3nV/Hz Low Power
Source Url Status Check Date	2013-05-01 14:56:26.341	2013-05-01 14:56:26.34	2013-05-01 14:56:26.336	2013-05-01 14:56:26.343	2013-05-01 14:56:26.339	2013-05-01 14:56:26.339
Brand Name	Analog Devices Inc	Analog Devices Inc	Analog Devices Inc	Analog Devices Inc	Analog Devices Inc	Analog Devices Inc
Is it lead-free?	Contains lead	Contains lead	Contains lead	Contains lead	Contains lead	Contains lead
Is it Rohs certified?	conform to	conform to	conform to	conform to	conform to	conform to
Maker	ADI	ADI	ADI	ADI	ADI	ADI
package instruction	SOP, SOP8,.25	TSSOP, TSSOP8,.19	SOP, SOP8,.25	SOP, SOP8,.25	TSSOP, TSSOP8,.19	TSSOP, TSSOP8,.19
Contacts	8	8	8	8	8	8
Manufacturer packaging code	R-8	RM-8	R-8	R-8	RM-8	RM-8
Reach Compliance Code	compliant	compliant	compliant	compliant	compliant	compliant
ECCN code	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Amplifier type	INSTRUMENTATION AMPLIFIER	INSTRUMENTATION AMPLIFIER	INSTRUMENTATION AMPLIFIER	INSTRUMENTATION AMPLIFIER	INSTRUMENTATION AMPLIFIER	INSTRUMENTATION AMPLIFIER
Maximum average bias current (IIB)	0.006 µA	0.006 µA	0.008 µA	0.006 µA	0.006 µA	0.006 µA
Nominal bandwidth (3dB)	10 MHz	10 MHz	10 MHz	10 MHz	10 MHz	10 MHz
Minimum Common Mode Rejection Ratio	93 dB	93 dB	80 dB	93 dB	93 dB	93 dB
Maximum input offset current (IIO)	0.0008 µA	0.0008 µA	0.0022 µA	0.0008 µA	0.0008 µA	0.0008 µA
Maximum input offset voltage	45 µV	45 µV	86 µV	45 µV	45 µV	45 µV
JESD-30 code	R-PDSO-G8	S-PDSO-G8	R-PDSO-G8	R-PDSO-G8	S-PDSO-G8	S-PDSO-G8
JESD-609 code	e3	e3	e3	e3	e3	e3
length	4.9 mm	3 mm	4.9 mm	4.9 mm	3 mm	3 mm
Humidity sensitivity level	1	1	1	1	1	1
Negative supply voltage upper limit	-18 V	-18 V	-18 V	-18 V	-18 V	-18 V
Nominal Negative Supply Voltage (Vsup)	-15 V	-15 V	-15 V	-15 V	-15 V	-15 V
maximum nonlinearity	0.005%	0.005%	0.005%	0.005%	0.005%	0.005%
Number of functions	1	1	1	1	1	1
Number of terminals	8	8	8	8	8	8
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SOP	TSSOP	SOP	SOP	TSSOP	TSSOP
Encapsulate equivalent code	SOP8,.25	TSSOP8,.19	SOP8,.25	SOP8,.25	TSSOP8,.19	TSSOP8,.19
Package shape	RECTANGULAR	SQUARE	RECTANGULAR	RECTANGULAR	SQUARE	SQUARE
Package form	SMALL OUTLINE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260	260	260	260	260	260
power supply	+-2.5/+-18/5/36 V	+-2.5/+-18/5/36 V	+-2.5/+-18/5/36 V	+-2.5/+-18/5/36 V	+-2.5/+-18/5/36 V	+-2.5/+-18/5/36 V
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	1.75 mm	1.1 mm	1.75 mm	1.75 mm	1.1 mm	1.1 mm
Nominal slew rate	35 V/us	35 V/us	35 V/us	35 V/us	35 V/us	35 V/us
Maximum slew rate	2.6 mA	2.6 mA	2.6 mA	2.6 mA	2.6 mA	2.6 mA
Supply voltage upper limit	18 V	18 V	18 V	18 V	18 V	18 V
Nominal supply voltage (Vsup)	15 V	15 V	15 V	15 V	15 V	15 V
surface mount	YES	YES	YES	YES	YES	YES
technology	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	1.27 mm	0.65 mm	1.27 mm	1.27 mm	0.65 mm	0.65 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	30	30	30	30	30	30
Maximum voltage gain	10000	10000	10000	10000	10000	10000
Minimum voltage gain	1	1	1	1	1	1
Nominal voltage gain	10	10	10	10	10	10
width	3.9 mm	3 mm	3.9 mm	3.9 mm	3 mm	3 mm

Recommended Resources

In circuit design, some design methods for circuit protection

A simple upconversion mixer circuit diagram

HT-1340 circuit

Potential control amplification and tone generation circuit

How to connect EXB851 external circuit

Adjustable voltage stabilized power supply circuit diagram with protection function

LTE Cat 1 STM32 4G EC200S: LTE Cat 1-the new favorite in the era of the Internet of ThingsAs NB-IoT reaches 50 million shipments this year and is expected to reach 100 million next year, it has risen rapidly. A medium-speed (in...; gandong stm32/stm8

Single-ended to balanced conversion, the actual situation is so different from the simulation, why?: I use LM7171 to make a single-ended to balanced circuit, as follows: The actual results are as follows: [attach ]539699[/attach] There are some puzzling points: 1. The positive and negative voltages b...; cncqzxj Analog electronics

[NXP Rapid IoT Review] + Preliminary Study on Power Consumption of Some Devices: [i=s]This post was last edited by anananjjj on 2019-1-7 23:22[/i] I plan to study application methods this weekend. Today, I took advantage of some time to test the power consumption of some devices. ...; anananjjj RF/Wirelessly

WWAYM launches NWRCFil low-pass filter: [i=s]This post was last edited by jameswangsynnex on 2015-3-3 20:00[/i] After the Windows version, WWAYM has launched the OS X version of the NWRCFil low-pass filter VST effect. 　　As a VST effector ba...; aifang Mobile and portable

Embedded Linux Learning Route Planning: ARM+LINUX route, focusing on embedded Linux operating system and its application software development goals: (1) Master the structure and principle of mainstream embedded microprocessors (preliminaril...; Nuli-IT Linux and Android

Today is the summer solstice. I heard that those who went out at noon had no shadow.: My current situation should be: "Sunrise in the east, rain in the west" White clouds, clear sky, but it is raining, sunny and rainy " The Chinese Astronomical Calendar shows that the Summer Solstice, ...; nmg Talking

Shortcut: 00 01 02 03 04 05 06 07 08 09 0A 0C 0F 0J 0L 0M 0R 0S 0T 0Z 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 1H 1K 1M 1N 1P 1S 1T 1V 1X 1Z 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 2G 2K 2M 2N 2P 2Q 2R 2S 2T 2W 2Z 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 3G 3H 3J 3K 3L 3M 3N 3P 3R 3S 3T 3V 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4M 4N 4P 4S 4T 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5E 5G 5H 5K 5M 5N 5P 5S 5T 5V 60 61 62 63 64 65 66 67 68 69 6A 6C 6E 6F 6M 6N 6P 6R 6S 6T 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7M 7N 7P 7Q 7V 7W 7X 80 81 82 83 84 85 86 87 88 89 8A 8D 8E 8L 8N 8P 8S 8T 8W 8Y 8Z 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9F 9G 9H 9L 9S 9T 9W

Popular Components