參數(shù)資料
型號(hào)： AD8624ARUZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 0K
描述： IC OPAMP GP R-R QUAD 14TSSOP
標(biāo)準(zhǔn)包裝： 96
放大器類(lèi)型： 電壓反饋
電路數(shù)： 4
輸出類(lèi)型： 滿擺幅
轉(zhuǎn)換速率： 0.48 V/µs
增益帶寬積： 560kHz
電流 - 輸入偏壓： 45pA
電壓 - 輸入偏移： 10µV
電流 - 電源： 215µA
電流 - 輸出 / 通道： 40mA
電壓 - 電源，單路/雙路(±)： ±2.5 V ~ 15 V
工作溫度： -40°C ~ 125°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 14-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 14-TSSOP
包裝： 管件
AD8622/AD8624
Data Sheet
Rev. D | Page 16 of 20
HALL SENSOR SIGNAL CONDITIONING
The AD8622/AD8624 is also highly suitable for high accuracy,
low power signal conditioning circuits. One such use is in Hall
sensor signal conditioning (see Figure 57). The magnetic
sensitivity of a Hall element is proportional to the bias voltage
applied across it. With 1 V bias voltage, the Hall element
consumes about 2.5 mA of supply current and has a sensitivity
of 5.5 mV/mT typical. To reduce power consumption, bias
voltage must be reduced, but at the risk of lower sensitivity. The
only way to achieve higher sensitivity is by introducing a gain
using a precision micropower amplifier. The AD8622/AD8624,
with all its features, is well suited to amplify the sensitivity of the
Hall element.
The ADR121 is a precision micropower 2.5 V voltage reference.
A precision voltage reference is required to hold a constant current
so that the Hall voltage only depends on the intensity of the
magnetic field. Using the 4.12k:98.8k resistive divider, the bias
voltage of the Hall element is reduced to 100 mV, leading to only
250 A of power consumption. The 3-op-amp in-amp
configuration of the AD8622/AD8624 then increases the
sensitivity to 55 mV/mT. The key to high CMRR for this in-amp
configuration are resistors that are well matched (where R1/R2
= R3/R4) from both the resistive ratio and relative drift. The
resistors are important in determining the performance over
manufacturing tolerances, time and temperature. At least 1% or
better resistors are recommended. Using the AD8622/AD8624 to
amplify the sensor signal can reduce power while also achieving
higher sensitivity. The total current consumed is just 1.2 mA,
resulting in 21× improvement in sensitivity/power.
VSY
R6
9.9k
R3
9.9k
R5
9.9k
R1
9.9k
R2
9.9k
R7
200
R8
4.12k
R9
98.8k
R4
9.9k
ADR121 – 2.5V
400
×4
HALL
ELEMENT
VOUT = 2.5V +
× MAGNETIC FIELD (mT)
55mV
mT
07527-
052
+
–
+
–
VSY
–
+
VSY
AD862x
–
+
C3
0.1F
TO 10F
C2
0.1F
C1
1F TO 10F
NOTES
1. USE MATCHED RESISTORS FOR IN-AMP.
2. FOR INFORMATION ON C1, C2, AND C3, REFER TO ADR121 DATA SHEET.
Figure 57. Hall Sensor Signal Conditioning
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AD8624ARUZ 制造商:Analog Devices 功能描述:OPERATIONAL AMPLIFIER (OP-AMP) IC
AD8624ARUZ-RL 功能描述:IC OPAMP GP R-R QUAD 14TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類(lèi)型:J-FET 電路數(shù):2 輸出類(lèi)型:- 轉(zhuǎn)換速率:13 V/µs 增益帶寬積:3MHz -3db帶寬:- 電流 - 輸入偏壓:65pA 電壓 - 輸入偏移:3000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件
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AD8625_13 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Precision Low Power Single-Supply JFET Amplifiers
AD8625AR 功能描述:IC OPAMP JFET 5MHZ QUAD 14SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類(lèi)型:通用 電路數(shù):1 輸出類(lèi)型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR)
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