Datasheet > AD8436BARQZ-RL

AD8436BARQZ-RL

更新时间： 2024-01-05 01:44:50

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
24页	747K
描述
Low Cost, Low Power, True RMS-to-DC Converter

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技术参数
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AD8436BARQZ-RL 技术参数

Source Url Status Check Date：	2013-05-01 14:56:26.377	是否无铅：	含铅
是否Rohs认证：	符合	生命周期：	Active
包装说明：	SSOP, SSOP20,.25	针数：	20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	1.58
Samacsys Description：	Analog Devices AD8436ARQZ, True RMS-DC Converter, 20-Pin, QSOP	其他特性：	ALSO OPERATES IN SINGLE SUPPLY VOLTAGE RANGE FROM 4.8 TO 36 VOLT
转换器类型：	RMS TO DC CONVERTER	JESD-30 代码：	R-PDSO-G20
JESD-609代码：	e3	长度：	8.66 mm
湿度敏感等级：	1	最大负电源电压：	-18 V
最小负电源电压：	-2.4 V	标称负供电电压：	-5 V
功能数量：	1	端子数量：	20
最高工作温度：	125 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SSOP
封装等效代码：	SSOP20,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	+-2.4/+-18/4.8/36 V	认证状态：	Not Qualified
座面最大高度：	1.75 mm	子类别：	Analog Special Function Converters
最大压摆率：	0.4 mA	最大供电电压：	18 V
最小供电电压：	2.4 V	标称供电电压：	5 V
表面贴装：	YES	技术：	BIPOLAR
温度等级：	AUTOMOTIVE	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.64 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	3.91 mm	Base Number Matches：	1

AD8436BARQZ-RL 数据手册

Low Cost, Low Power,

True RMS-to-DC Converter

AD8436

Data Sheet

FEATURES

FUNCTIONAL BLOCK DIAGRAM

CAVG CCF

Delivers true rms or average rectified value of ac waveform

Fast settling at all input levels

Accuracy: 10 μV 0.25% of reading (B grade)

Wide dynamic input range

100 μV rms to 3 V rms (8.5 V p-p) full-scale input range

Larger inputs with external scaling

Wide bandwidth:

VCC

AD8436

100kΩ

SUM

IGND

100kΩ

8kΩ

RMS CORE

10pF

RMS

VEE

OGND

OUT

16kΩ

1 MHz for −3 dB (300 mV)

65 kHz for additional 1% error

Zero converter dc output offset

No residual switching products

Specified at 300 mV rms input

Accurate conversion with crest factors up to 10

Low power: 300 µA typical at 2.4 V

High-Z FET separately powered input buffer

R_IN≥ 10¹²Ω, C_IN≤ 2 pF

10kΩ

IBUFGN

IBUFIN–

IBUFIN+

–

IBUFOUT

FET OP AMP

OBUFIN+

OBUFIN–

–

DC BUFFER

OBUFOUT

16kΩ

Precision dc output buffer

Wide power supply voltage range

Dual: 2.4 V to 18 V; single: 4.8 V to 36 V

4 mm × 4 mm LFCSP and 8 mm × 6 mm QSOP packages

ESD protected

Figure 1.

GENERAL DESCRIPTION

The AD8436 is a new generation, translinear precision, low

power, true rms-to-dc converter loaded with options. It

computes a precise dc equivalent of the rms value of ac wave-

forms, including complex patterns such as those generated by

switch mode power supplies and triacs. Its accuracy spans a

wide range of input levels (see Figure 2) and temperatures.

The ensured accuracy of ≤ 0.5% and ≤10 µV output offset

result from the latest Analog Devices, Inc., technology. The

crest factor error is <0.5% for CF values between 1 and 10.

The precision dc output buffer minimizes errors when driving

low impedance loads with extremely low offset voltages, thanks

to internal bias current cancellation. Unlike digital solutions, the

AD8436 has no switching circuitry limiting performance at high or

low amplitudes (see Figure 2). A usable response of <100 µV and

>3 V extends the dynamic range with no external scaling,

accommodating demanding low level signal conditions and

allowing ample overrange without clipping

GREATER INPUT DYNAMIC RANGE

The AD8436 delivers true rms results at less cost than

misleading peak, averaging, or digital solutions. There is no

programming expense or processor overhead to consider, and

the 4 mm × 4 mm package easily fits into tight applications.

On-board buffer amplifiers enable the widest range of options

for any rms-to-dc converter available, regardless of cost. For

minimal applications, only a single external averaging capacitor

is required. The built-in high impedance FET buffer provides

an interface for external attenuators, frequency compensation,

or driving low impedance loads. A matched pair of internal

resistors enables an easily configurable gain-of-two or more,

extending the usable input range even lower. The low power,

precision input buffer makes the AD8436 attractive for use in

portable multi-meters and other battery-powered applications.

AD8436

ΔΣ SOLUTION

100µV

1mV

10mV

100mV

Figure 2. Usable Dynamic Range of the AD8436 vs. ∆Σ

The AD8436 operates from single or dual supplies of 2.4 V

(4.8 V) to 18 V (36 V). A and J grades are available in a

compact 4 mm × 4 mm, 20-lead chip-scale package; A and B

grades are available in a 20-lead QSOP package. The operating

temperature ranges are −40°C to 125°C for A and B grades and

0°C to 70°C for J grade.

Rev. B

Document Feedback

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

rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.

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

Technical Support

www.analog.com

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