AD8421BRMZ-R7
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Analog Devices Inc. AD8421BRMZ-R7

Manufacturer No:
AD8421BRMZ-R7
Manufacturer:
Analog Devices Inc.
Package:
Tape & Reel (TR)
Description:
IC INST AMP 1 CIRCUIT 8MSOP
Delivery:
Payment:
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Product Introduction

Overview

The AD8421BRMZ-R7, produced by Analog Devices Inc., is a low-cost, low-power, extremely low-noise, ultra-low bias current, high-speed instrumentation amplifier. It is designed for a broad spectrum of signal conditioning and data acquisition applications. This amplifier is notable for its high common-mode rejection ratio (CMRR), low noise, and high precision DC performance, making it ideal for extracting low-level signals in the presence of high-frequency common-mode noise over a wide temperature range.

Key Specifications

ParameterUnitMinTypMax
Supply VoltageV±2.5±18 (5 V to 36 V single supply)
Input Bias CurrentpA0.15008 (over temperature)
Input Offset VoltageµV5070135 (over temperature)
Input Offset Voltage DriftµV/°C0.2
Gain Driftppm/°C1
CMRR at 20 kHz (G = 1)dB80
Bandwidth (G = 1)MHz10
Bandwidth (G = 100)MHz2
Slew RateV/µs35
Settling Time to 0.001% (G = 10)µs0.6
Input Voltage Noise at 1 kHznV/√Hz3.2
Current Noise at 1 kHzfA/√Hz200
Quiescent CurrentmA2.3
Operating Temperature Range°C-40+85 (MSOP, SOIC), +125 (LFCSP)

Key Features

  • Low power consumption with a maximum supply current of 2.3 mA.
  • Extremely low noise: 3.2 nV/√Hz input voltage noise and 200 fA/√Hz current noise at 1 kHz.
  • High CMRR: up to 94 dB minimum at G = 1.
  • High precision DC performance with low input offset voltage drift (0.2 µV/°C) and low gain drift (1 ppm/°C).
  • High-speed performance: 10 MHz bandwidth at G = 1, 2 MHz at G = 100, and 0.6 µs settling time to 0.001% at G = 10.
  • 35 V/µs slew rate.
  • Inputs protected to 40 V from the opposite supply rail.
  • Gain settable with a single resistor from 1 to 10,000.
  • Available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC packages.

Applications

  • Medical instrumentation.
  • Precision data acquisition.
  • Microphone preamplification.
  • Vibration analysis.
  • Multiplexed input applications.
  • ADC driver.

Q & A

  1. What is the typical input voltage noise of the AD8421? The AD8421 has a typical input voltage noise of 3.2 nV/√Hz at 1 kHz.
  2. What is the maximum input bias current of the AD8421? The maximum input bias current is 500 pA.
  3. What is the CMRR of the AD8421 at 20 kHz with a gain of 1? The CMRR is 80 dB at 20 kHz with a gain of 1.
  4. What is the settling time of the AD8421 to 0.001% at a gain of 10? The settling time is 0.6 µs to 0.001% at a gain of 10.
  5. What are the available package types for the AD8421? The AD8421 is available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC packages.
  6. What is the operating temperature range for the AD8421 in MSOP and SOIC packages? The operating temperature range is -40°C to +85°C for MSOP and SOIC packages.
  7. Can the gain of the AD8421 be set with a single resistor? Yes, the gain can be set with a single resistor from 1 to 10,000.
  8. What is the slew rate of the AD8421? The slew rate is 35 V/µs.
  9. What are some typical applications of the AD8421? Typical applications include medical instrumentation, precision data acquisition, microphone preamplification, vibration analysis, and multiplexed input applications.
  10. How is the input protection of the AD8421? The inputs are protected to 40 V from the opposite supply rail.

Product Attributes

Amplifier Type:Instrumentation
Number of Circuits:1
Output Type:- 
Slew Rate:35V/µs
Gain Bandwidth Product:- 
-3db Bandwidth:10 MHz
Current - Input Bias:100 pA
Voltage - Input Offset:25 µV
Current - Supply:2mA
Current - Output / Channel:65 mA
Voltage - Supply Span (Min):5 V
Voltage - Supply Span (Max):36 V
Operating Temperature:-40°C ~ 85°C
Mounting Type:Surface Mount
Package / Case:8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package:8-MSOP
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Similar Products

Part Number AD8421BRMZ-R7 AD8422BRMZ-R7 AD8421BRMZ-RL AD8421BRZ-R7 AD8421ARMZ-R7
Manufacturer Analog Devices Inc. Analog Devices Inc. Analog Devices Inc. Analog Devices Inc. Analog Devices Inc.
Product Status Active Active Active Active Active
Amplifier Type Instrumentation Instrumentation Instrumentation Instrumentation Instrumentation
Number of Circuits 1 1 1 1 1
Output Type - Rail-to-Rail - - -
Slew Rate 35V/µs 0.8V/µs 35V/µs 35V/µs 35V/µs
Gain Bandwidth Product - - - - -
-3db Bandwidth 10 MHz 2.2 MHz 10 MHz 10 MHz 10 MHz
Current - Input Bias 100 pA 200 pA 100 pA 100 pA 1 nA
Voltage - Input Offset 25 µV 50 µV 25 µV 25 µV 60 µV
Current - Supply 2mA 300µA 2mA 2mA 2mA
Current - Output / Channel 65 mA 20 mA 65 mA 65 mA 65 mA
Voltage - Supply Span (Min) 5 V 4.6 V 5 V 5 V 5 V
Voltage - Supply Span (Max) 36 V 36 V 36 V 36 V 36 V
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 8-SOIC (0.154", 3.90mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package 8-MSOP 8-MSOP 8-MSOP 8-SOIC 8-MSOP

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