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AD620ARZ

Inst Amp, G=1-10000, 30uV Vos, SOIC-8

4103

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制造商零件：

AD620ARZ

包装：

SOIC-8（4.9 x 3.9 x 1.5 毫米，1.27 毫米间距）

品牌：
产品类别：
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说明

产品概览

The AD620ARZ from Analog Devices is a low-drift, low-power instrumentation amplifier with single-resistor gain setting (1 to 10000), SOIC-8 package, and excellent DC precision.

主要规格

类型 Low-Drift Low-Power Instrumentation Amplifier
Gain Range 1 to 10,000 (single external resistor)
Gain Formula G = 1 + (49.4 kOhm / RG)
输入失调电压 30 uV (typical); 50 uV (max, B grade)
Input Offset Drift 0.6 uV/C (max, B grade)
输入偏置电流 0.5 nA (typical); 1.0 nA (max)
CMRR 93 dB (min) @ G=1; 130 dB @ G=1000
Bandwidth 1 MHz @ G=1; 120 kHz @ G=100
压摆率 1.2 V/us
Settling Time 15 us to 0.01%
电源电压 +/-2.3V to +/-18V
Supply Current 1.3 mA (max)
Input Voltage Noise 9 nV/sqrt(Hz) @ 1kHz
包装 SOIC-8 (R suffix)
工作温度 -40C to +85C (A grade)

特点

  • Gain set with single external resistor (1 to 10000)
  • 30uV typical input offset voltage
  • 0.6uV/C max offset drift (B grade)
  • 1nA max input bias current (Super-beta processing)
  • 100dB min CMRR at G=10
  • 9 nV/sqrt(Hz) input voltage noise at 1kHz
  • 15us settling time to 0.01%
  • Wide supply range +/-2.3V to +/-18V

应用

  • Weigh scales
  • ECG and medical instrumentation
  • Transducer interfaces
  • Data acquisition systems

The AD620ARZ from Analog Devices is a low-cost, high-precision instrumentation amplifier that requires only one external resistor to set gains from 1 to 10,000. The device features 30uV typical input offset voltage, 0.6uV/C max offset drift, and 1.0nA max input bias current (achieved through Super-beta input processing), making it ideal for precision data acquisition. The 100dB minimum CMRR at G=10 rejects common-mode interference in bridge and thermocouple applications. The 9 nV/sqrt(Hz) input voltage noise at 1kHz and 0.28uV p-p noise in the 0.1-10Hz band enable low-noise signal conditioning for ECG and weigh scale applications. The 15us settling time to 0.01% supports multiplexed data acquisition systems. The wide +/-2.3V to +/-18V supply range allows operation from dual 5V to +/-15V rails. The 1.3mA max supply current makes it suitable for battery-powered portable equipment. The gain is set by the formula G = 1 + 49.4kOhm/RG, where RG is connected between the RG pins.

The AD620ARZ uses a classic three-op-amp instrumentation amplifier topology with a precision laser-trimmed thin-film resistor network. The input stage consists of two non-inverting amplifiers (A1, A2) with feedback through the internal 24.7kOhm resistors and the external gain resistor RG. The differential input voltage (V+IN – V-IN) appears across RG, creating a current I = (V+IN – V-IN) / RG. This current flows through the internal 24.7kOhm resistors, producing a preamplified differential voltage of (V+IN – V-IN) x (1 + 2 x 24.7k/RG) = (V+IN – V-IN) x (1 + 49.4k/RG) at the outputs of A1 and A2. The output stage (A3) is a unity-gain difference amplifier that converts the differential signal to a single-ended output. The internal 24.7kOhm and 10kOhm resistors are laser-trimmed to achieve the high CMRR specification. The Super-beta input transistors provide the 1nA max input bias current by using high-gain PNP transistors in the input pair, which is critical for high-impedance sensor interfaces where bias current would create offset voltage across source resistance. The settling time of 15us to 0.01% is achieved through the optimized compensation of the internal amplifiers.

针脚 名称 类型 功能
1 RG1 输入 Gain resistor connection 1
2 -IN 输入 Inverting input (high impedance)
3 +IN 输入 Non-inverting input (high impedance)
4 -VS 电源 Negative supply
5 REF 输入 Output reference (usually GND)
6 OUTPUT 输出 Amplified output voltage
7 +VS 电源 Positive supply
8 RG2 输入 Gain resistor connection 2
  • Load cell weigh scale with AD620 at G=1000 and 30uV offset for sub-gram resolution from 2mV/V bridge output
  • ECG front-end instrumentation amplifier with 0.28uV p-p low-frequency noise, 100dB CMRR, and Super-beta 1nA bias current
  • Thermocouple signal conditioning with G=100, +/-15V supply, and 0.6uV/C offset drift for cold-junction compensation accuracy
制造商 部件编号 包装 说明
ADI AD620BRZ SOIC-8 B grade, better offset spec
ADI AD8221ARZ SOIC-8 Newer, better CMRR, wider BW
TI INA128UA SOIC-8 Equivalent function, similar spec
ADI AD8422ARZ SOIC-8 Lowest noise, 3.2nV/sqrtHz
TI INA333AIDR SOIC-8 Zero-drift, 350uA supply
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

服务与包装

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Contact Information

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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