AD736JNZ

更新时间： 2024-11-23 12:52:11

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
20页	480K
描述
Low Cost, Low Power, True RMS-to-DC Converter

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AD736JNZ 数据手册

Low Cost, Low Power,

True RMS-to-DC Converter

Data Sheet

AD736

FEATURES

FUNCTIONAL BLOCK DIAGRAM

+VS

8kΩ

Converts an ac voltage waveform to a dc voltage and then

converts to the true rms, average rectified, or absolute value

200 mV rms full-scale input range (larger inputs with input

attenuator)

OUT

FULL WAVE

RECTIFIER

RMS

CORE

VIN

8kΩ

(OPT)

High input impedance: 10¹²

Ω

Low input bias current: 25 pA maximum

High accuracy: 0.3 mV 0.3% of reading

CAV

BIAS

SECTION

COM

CAV

–VS

RMS conversion with signal crest factors up to 5

Wide power supply range: +2.8 V, −3.2 V to 16.5 V

Low power: 200 µA maximum supply current

Buffered voltage output

No external trims needed for specified accuracy

Related device: the AD737—features a power-down control

with standby current of only 25 μA; the dc output voltage

is negative and the output impedance is 8 kΩ

Figure 1.

The AD736 allows the choice of two signal input terminals: a

high impedance FET input (10¹²Ω) that directly interfaces with

High-Z input attenuators and a low impedance input (8 kΩ) that

allows the measurement of 300 mV input levels while operating

from the minimum power supply voltage of +2.8 V, −3.2 V. The

two inputs can be used either single ended or differentially.

The AD736 has a 1% reading error bandwidth that exceeds

10 kHz for the input amplitudes from 20 mV rms to 200 mV rms

while consuming only 1 mW.

GENERAL DESCRIPTION

The AD736 is a low power, precision, monolithic true rms-to-

dc converter. It is laser trimmed to provide a maximum error of

0.3 mV 0.3% of reading with sine wave inputs. Furthermore,

it maintains high accuracy while measuring a wide range of

input waveforms, including variable duty-cycle pulses and triac

(phase)-controlled sine waves. The low cost and small size of

this converter make it suitable for upgrading the performance

of non-rms precision rectifiers in many applications. Compared

to these circuits, the AD736 offers higher accuracy at an equal

or lower cost.

The AD736 is available in four performance grades. The

AD736J and AD736K grades are rated over the 0°C to +70°C

and −20°C to +85°C commercial temperature ranges. The

AD736A and AD736B grades are rated over the −40°C to +85°C

industrial temperature range. The AD736 is available in three

low cost, 8-lead packages: PDIP, SOIC, and CERDIP.

PRODUCT HIGHLIGHTS

1. The AD736 is capable of computing the average rectified

value, absolute value, or true rms value of various input signals.

The AD736 can compute the rms value of both ac and dc input

voltages. It can also be operated as an ac-coupled device by

adding one external capacitor. In this mode, the AD736 can

resolve input signal levels of 100 μV rms or less, despite variations

in temperature or supply voltage. High accuracy is also maintained

for input waveforms with crest factors of 1 to 3. In addition,

crest factors as high as 5 can be measured (introducing only 2.5%

additional error) at the 200 mV full-scale input level.

2. Only one external component, an averaging capacitor, is

required for the AD736 to perform true rms measurement.

3. The low power consumption of 1 mW makes the AD736

suitable for many battery-powered applications.

4. A high input impedance of 10¹²Ω eliminates the need for an

external buffer when interfacing with input attenuators.

The AD736 has its own output buffer amplifier, thereby pro-

viding a great deal of design flexibility. Requiring only 200 µA

of power supply current, the AD736 is optimized for use in

portable multimeters and other battery-powered applications.

5. A low impedance input is available for those applications that

require an input signal up to 300 mV rms operating from low

power supply voltages.

Rev. I

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.

Tel: 781.329.4700

www.analog.com

12 3 4 5 6 7...20

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AD736JNZ 替代型号

型号	品牌	替代类型	描述	数据表
AD736JR-REEL7	ADI	完全替代	Low Cost, Low Power, True RMS-to-DC Converter
AD736KRZ-R7	ADI	完全替代	Low Cost, Low Power, True RMS-to-DC Converter
AD736BR-REEL	ADI	完全替代	Low Cost, Low Power, True RMS-to-DC Converter

与AD736JNZ相关器件

型号	品牌	获取价格	描述	数据表
AD736JR	ADI	获取价格	Low Cost, Low Power, True RMS-to-DC Converter
AD736JR-REEL	ADI	获取价格	Low Cost, Low Power, True RMS-to-DC Converter
AD736JR-REEL7	ADI	获取价格	Low Cost, Low Power, True RMS-to-DC Converter
AD736JR-REEL-7	ADI	获取价格	Low Cost, Low Power, True RMS-to-DC Converter
AD736JRZ	ADI	获取价格	Low Cost, Low Power, True RMS-to-DC Converter
AD736JRZ-R7	ADI	获取价格	Low Cost, Low Power, True RMS-to-DC Converter
AD736JRZ-RL	ADI	获取价格	Low Cost, Low Power, True RMS-to-DC Converter
AD736KN	ADI	获取价格	Low Cost, Low Power, True RMS-to-DC Converter
AD736KNZ	ADI	获取价格	Low Cost, Low Power, True RMS-to-DC Converter
AD736KR	ADI	获取价格	Low Cost, Low Power, True RMS-to-DC Converter

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