AD8436JCPZ-RL datasheet, PDF - EEWORLD Datasheet

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AD8436JCPZ-RL: DescriptionPower Management IC Development Tools AD8436 EVAL Brd; Categorysemiconductor Power management; File Size788KB，21 Pages; ManufacturerADI; Websitehttps://www.analog.com

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Power Management IC Development Tools AD8436 EVAL Brd

AD8436JCPZ-RL Parametric

Parameter Name	Attribute value
Product Category	Power Management Specialized - PMIC
Manufacturer	ADI
RoHS	Details
Input Voltage Range	+ / - 18 V
Input Current	300 uA
Operating Temperature Range	- 40 C to + 125 C
Package / Case	LFCSP-20
Type	RSM to DC Converter
Packaging	Reel
Development Kit	AD8436-EVALZ
Height	0.73 mm
Length	4 mm
Maximum Operating Temperature	+ 125 C
Minimum Operating Temperature	- 40 C
Moisture Sensitive	Yes
Operating Supply Current	300 uA
Operating Supply Voltage	+ / - 18 V
Factory Pack Quantity	5000
Width	4 mm

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Data Sheet

FEATURES

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:

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

≥ 10

Ω, C

≤ 2 pF

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

Low Cost, Low Power,

True RMS-to-DC Converter

AD8436

FUNCTIONAL BLOCK DIAGRAM

CAVG CCF

AD8436

SUM

RMS

8kΩ

RMS CORE

VCC

100kΩ

IGND

100kΩ

VEE

16kΩ

10pF

OGND

OUT

IBUFGN

IBUFIN–

IBUFIN+

10kΩ

–

10kΩ

IBUFOUT

FET OP AMP

OBUFIN+

OBUFIN–

16kΩ

–

DC BUFFER

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 waveforms, 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

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.

Rev. E

Document Feedback

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

Technical Support

www.analog.com

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

rights of third parties that may result from its 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 and registered trademarks are the property of their respective owners.

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

AD8436

∆Σ

SOLUTION

100µV

1mV

10mV

100mV

10033-002

Figure 2. Usable Dynamic Range of the

AD8436

vs. ΔΣ

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.

10033-001

OBUFOUT

AD8436

TABLE OF CONTENTS

Features .............................................................................................. 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 4

ESD Caution .................................................................................. 4

Pin Configurations and Function Descriptions ........................... 5

Typical Performance Characteristics ............................................. 6

Test Circuits ....................................................................................... 9

Data Sheet

Theory of Operation ...................................................................... 10

Overview ..................................................................................... 10

Applications Information .............................................................. 12

Using the AD8436 ...................................................................... 12

Additional Information ............................................................. 15

AD8436 Evaluation Board ............................................................ 17

Outline Dimensions ....................................................................... 20

Ordering Guide .......................................................................... 21

REVISION HISTORY

3/2017—Rev. D to Rev. E

Changed CP-20-10 to CP-20-8 .................................... Throughout

Changes to Outline Dimensions................................................... 21

Changes to Ordering Guide .......................................................... 22

10/2015—Rev. C to Rev. D

Changes to Figure 5 to Figure 8 ...................................................... 6

7/2015—Rev. B to Rev. C

Changes to Table 2 ............................................................................ 4

Changes to Figure 5 to Figure 7 ...................................................... 6

Changes to Figure 21 ........................................................................ 9

Changes to Using the FET Input Buffer Section ........................ 14

Changes to Single-Supply Section and Figure 39 ....................... 15

Added Additional Information Section....................................... 15

Changes to AD8436 Evaluation Board Section and A Word

About Using the AD8436 Evaluation Board Section ................... 17

Added Single-Supply Operation Section ..................................... 17

Changes to Ordering Guide .......................................................... 21

1/2013—Rev. A to Rev. B

Added B Grade Throughout ............................................. Universal

Changes to Figure 1 and changes to General Description .......... 1

Changes to Table 1 ............................................................................ 3

Changes to Figure 3 ......................................................................... 5

Changes to Figure 9 and Figure 10 ................................................. 6

Changes to FET Input Buffer Section .......................................... 11

Changes to Averaging Capacitor Considerations—RMS

Accuracy Section and changes to Figure 28 ................................ 12

Deleted Capacitor Construction Section; added CAVG

Capacitor Styles Section................................................................. 13

Added Converting to Average Rectified Value Section ............. 15

Changes to Figure 41 ...................................................................... 16

Changes to Evaluation Board Section .......................................... 17

Changes to Figure 48 ...................................................................... 19

Changes to Outline Dimensions................................................... 20

Changes to Ordering Guide .......................................................... 21

7/2012—Rev. 0 to Rev. A

Added 20-Lead QSOP ....................................................... Universal

Changes to Features Section and General Description Section ..1

Changes to Table 1.............................................................................3

Changes to Table 2.............................................................................4

Changes to Table 3 and added Figure 4 and added Table 4;

Renumbered Sequentially ................................................................5

Changes to Equation 1 and change to Column One Heading

in Table 5.......................................................................................... 10

Changes to Averaging Capacitor Considerations—RMS

Accuracy and to Post Conversion Ripple Reduction Filter

and changes to Figure 27 Caption ................................................ 12

Changes to Figure 30 to Figure 32................................................ 13

Changes to Using the FET Input Buffer Section and Using the

Output Buffer Section .................................................................... 14

Changes to Figure 38 and Figure 41 and added Converting

to Rectified Average Value Section .............................................. 15

Changes to Figure 41...................................................................... 16

Changes to Figure 42 to Figure 46................................................ 17

Changes to Figure 47 and Figure 48............................................. 18

Updated Outline Dimensions ....................................................... 19

Changes to Ordering Guide .......................................................... 20

7/2011—Revision 0: Initial Version

Rev. E | Page 2 of 21

AD8436JCPZ-RL Related Products

	AD8436JCPZ-RL	AD8436BRQZ-R7	AD8436BRQZ
Description	Power Management IC Development Tools AD8436 EVAL Brd	Power Management IC Development Tools AD8436 EVAL Brd	USB Cables / IEEE 1394 Cables USB Embedded Serial Conv 5V 3.5mm Plug
Product Category	Power Management Specialized - PMIC	Power Management Specialized - PMIC	Power Management Specialized - PMIC
Manufacturer	ADI	ADI	ADI
RoHS	Details	Details	Details
Input Voltage Range	+ / - 18 V	+ / - 18 V	2.4 V to 18 V
Input Current	300 uA	300 uA	300 uA
Operating Temperature Range	- 40 C to + 125 C	- 40 C to + 125 C	- 40 C to + 125 C
Type	RSM to DC Converter	RSM to DC Converter	RSM to DC Converter
Packaging	Reel	Reel	Tube
Development Kit	AD8436-EVALZ	AD8436-EVALZ	AD8436-EVALZ
Operating Supply Current	300 uA	300 uA	300 uA
Operating Supply Voltage	+ / - 18 V	+ / - 18 V	2.4 V to 18 V
Factory Pack Quantity	5000	1000	56
Package / Case	LFCSP-20	-	QSOP-20
Maximum Operating Temperature	+ 125 C	-	+ 125 C
Minimum Operating Temperature	- 40 C	-	- 40 C

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