AD8475BRMZ-R7 datasheet, PDF - EEWORLD Datasheet

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AD8475BRMZ-R7: DescriptionDifferential Amplifiers Prec Selectable Gain Funnel; CategoryAnalog mixed-signal IC Amplifier circuit; File Size584KB，24 Pages; ManufacturerADI; Websitehttps://www.analog.com; Environmental Compliance

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Differential Amplifiers Prec Selectable Gain Funnel

AD8475BRMZ-R7 Parametric

Parameter Name	Attribute value
Source Url Status Check Date	2013-05-01 14:56:26.495
Brand Name	Analog Devices Inc
Is it lead-free?	Contains lead
Is it Rohs certified?	conform to
Maker	ADI
Parts packaging code	TSSOP
package instruction	TSSOP,
Contacts	10
Manufacturer packaging code	RM-10
Reach Compliance Code	compliant
ECCN code	EAR99
Samacsys Description	SP Amp DIFF AMP Single R-R O/P ±5V/10V 10-Pin MSOP T/R
Amplifier type	OPERATIONAL AMPLIFIER
Nominal Common Mode Rejection Ratio	86 dB
Maximum input offset voltage	200 µV
JESD-30 code	S-PDSO-G10
JESD-609 code	e3
length	3 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	10
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Package shape	SQUARE
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	1.1 mm
Nominal slew rate	50 V/us
Supply voltage upper limit	11 V
Nominal supply voltage (Vsup)	5 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	0.5 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	3 mm

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Data Sheet

FEATURES

Precision attenuation: G = 0.4, G = 0.8

Fully differential or single-ended input/output

Differential output designed to drive precision ADCs

Drives switched capacitor and Σ-Δ ADCs

Rail-to-rail output

VOCM pin adjusts output common-mode voltage

Robust overvoltage protection up to ±15 V (V

= +5 V)

Single supply: 3 V to 10 V

Dual supplies: ±1.5 V to ±5 V

High performance

Suited for driving 18-bit converters up to 4 MSPS

10 nV/√Hz output noise

3 ppm/°C gain drift

500 μV maximum output offset

50 V/μs slew rate

Low power: 3.2 mA supply current

Precision, Selectable Gain,

Fully Differential Funnel Amplifier

AD8475

FUNCTIONAL BLOCK DIAGRAMS

16 +IN 0.4x

15 –V

13 –V

1kΩ

1.25kΩ

+IN 0.8x 2

–IN 0.8x 3

1.25kΩ

–IN 0.4x 4

1.25kΩ

+IN 0.4x 1

14 –V

12 NC

11 –OUT

AD8475

10 +OUT

1kΩ

VOCM

–IN 0.4x 5

NC = NO CONNECT

+IN 0.8x

ADC drivers

Differential instrumentation amplifier building blocks

Single-ended-to-differential converters

+IN 0.4x

APPLICATIONS

Figure 1. 16-Lead LFCSP

–OUT

–V

1kΩ

1.25kΩ

GENERAL DESCRIPTION

The

AD8475

is a fully differential, attenuating amplifier with

integrated precision gain resistors. It provides precision attenuation

(by 0.4 or 0.8), common-mode level shifting, and single-ended-to-

differential conversion along with input overvoltage protection.

Power dissipation on a single 5 V supply is only 16 mW.

The

AD8475

is a simple to use, fully integrated precision gain

block, designed to process signal levels of up to ±10 V on a single

supply. It provides a complete interface to make industrial level

signals directly compatible with the differential input ranges of low

voltage high performance 16-bit or 18-bit single-supply successive

approximation (SAR) analog-to-digital converters (ADCs).

The

AD8475

comes with two standard pin-selectable gain

options: 0.4 and 0.8. The gain of the part is set by driving the

input pin corresponding to the appropriate gain.

The

AD8475

also provides overvoltage protection from large

industrial input voltages up to ±15 V while operating on a single

5 V supply. The VOCM pin adjusts the output voltage common

mode for precision level shifting, to match the ADC’s input range

and maximize dynamic range.

AD8475

1kΩ

–IN 0.8x

–IN 0.4x

S 3

VOCM

+OUT

NC = NO CONNECT

Figure 2. 10-Lead MSOP

The

AD8475

works extremely well with SAR, Σ-Δ, and pipeline

converters. The high current output stage of the part allows it to

drive the switched capacitor front-end circuits of many ADCs with

minimal error.

Unlike many differential drivers in the market, the

AD8475

is a

high precision amplifier. With 500 µV maximum output offset,

10 nV/√Hz output noise, and −112 dB THD + N, the

AD8475

pairs well with high accuracy converters. Considering its low power

consumption and high precision, the slew-enhanced

AD8475

has

excellent speed, settling to 18-bit precision for 4 MSPS acquisition.

The

AD8475

is available in a space-saving 16-lead 3 mm × 3 mm

LFCSP package and a 10-lead MSOP package. It is fully specified

over the −40°C to +85°C temperature range.

Rev. D

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.

09432-002

09432-001

AD8475

TABLE OF CONTENTS

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

Applications ....................................................................................... 1

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

Functional Block Diagrams ............................................................. 1

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

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

Absolute Maximum Ratings ............................................................ 5

Thermal Resistance ...................................................................... 5

ESD Caution .................................................................................. 5

Pin Configurations and Function Descriptions ........................... 6

Typical Performance Characteristics ............................................. 8

Terminology .................................................................................... 16

Theory of Operation ...................................................................... 17

Overview...................................................................................... 17

Data Sheet

Circuit Information .................................................................... 17

DC Precision ............................................................................... 17

Input Voltage Range ................................................................... 18

Driving the AD8475................................................................... 18

Power Supplies ............................................................................ 18

Applications Information .............................................................. 19

Typical Configuration ................................................................ 19

Single-Ended to Differential Conversion ................................ 19

Setting the Output Common-Mode Voltage .......................... 19

High Performance ADC Driving ............................................. 20

AD8475 Evaluation Board ............................................................ 22

Outline Dimensions ....................................................................... 23

Ordering Guide .......................................................................... 24

REVISION HISTORY

3/2017—Rev. C to Rev. D

Changes to Figure 3 .......................................................................... 6

Updated Outline Dimensions ....................................................... 23

Changes to Ordering Guide .......................................................... 24

1/2014—Rev. B to Rev. C

Changed Minimum B Grade Output Balance Error from 90 dB

to −90 dB............................................................................................ 3

Changes to Endnote 3; Table 1 ........................................................ 4

Changes to Terminology Section.................................................. 16

Changes to Input Voltage Range Section and Figure 51 ........... 18

Changes to Single-Ended to Differential Conversion Section

and Setting the Output Common-Mode Voltage Section ......... 19

Changes to Figure 56 ...................................................................... 22

4/2011—Rev. A to Rev. B

Added B Grade Columns to Specifications Section .....................3

Changes to Figure 16.........................................................................9

Changes to Figure 43...................................................................... 14

Changes to Ordering Guide .......................................................... 24

1/2011—Rev. 0 to Rev. A

Added 16-Lead LFCSP ................................................. Throughout

Changes to Table 1 and Note 3 ........................................................3

Change to Table 2 ..............................................................................5

Added Figure 3 and Table 4; Renumbered Sequentially ..............6

Changes to Typical Performance Characteristics Format ............8

Added AD8475 Evaluation Board Section and Figure 56......... 22

10/2010—Revision 0: Initial Version

Rev. D | Page 2 of 24

AD8475BRMZ-R7 Related Products

	AD8475BRMZ-R7	AD8475ARMZ-RL	AD8475-EVALZ	AD8475ARMZ-R7	AD8475ACPZ-WP	AD8475ACPZ-R7
Description	Differential Amplifiers Prec Selectable Gain Funnel	Differential Amplifiers Prec Selectable Gain Funnel	Amplifier IC Development Tools AD8475 EVAL BRD	Differential Amplifiers Prec Selectable Gain Funnel	Differential Amplifiers Prec Selectable Gain Funnel	Differential Amplifiers Prec Selectable Gain Funnel
Brand Name	Analog Devices Inc	Analog Devices Inc	-	Analog Devices Inc	Analog Devices Inc	Analog Devices Inc
Is it lead-free?	Contains lead	Contains lead	-	Contains lead	Contains lead	Contains lead
Is it Rohs certified?	conform to	conform to	-	conform to	conform to	conform to
Maker	ADI	ADI	-	ADI	ADI	ADI
Parts packaging code	TSSOP	TSSOP	-	TSSOP	SON	SON
package instruction	TSSOP,	TSSOP, TSSOP10,.19,20	-	TSSOP, TSSOP10,.19,20	HVQCCN, LCC16,.12SQ,20	HVQCCN, LCC16,.12SQ,20
Contacts	10	10	-	10	16	16
Manufacturer packaging code	RM-10	RM-10	-	RM-10	CP-16-22	CP-16-22
Reach Compliance Code	compliant	compliant	-	compliant	compliant	compliant
ECCN code	EAR99	EAR99	-	EAR99	EAR99	EAR99
Amplifier type	OPERATIONAL AMPLIFIER	OPERATIONAL AMPLIFIER	-	OPERATIONAL AMPLIFIER	OPERATIONAL AMPLIFIER	-
Nominal Common Mode Rejection Ratio	86 dB	76 dB	-	76 dB	76 dB	-
Maximum input offset voltage	200 µV	500 µV	-	500 µV	500 µV	-
JESD-30 code	S-PDSO-G10	S-PDSO-G10	-	S-PDSO-G10	S-XQCC-N16	-
JESD-609 code	e3	e3	-	e3	e3	-
length	3 mm	3 mm	-	3 mm	3 mm	-
Humidity sensitivity level	1	1	-	1	1	-
Number of functions	1	1	-	1	1	-
Number of terminals	10	10	-	10	16	-
Maximum operating temperature	85 °C	85 °C	-	85 °C	85 °C	-
Minimum operating temperature	-40 °C	-40 °C	-	-40 °C	-40 °C	-
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY	UNSPECIFIED	-
encapsulated code	TSSOP	TSSOP	-	TSSOP	HVQCCN	-
Package shape	SQUARE	SQUARE	-	SQUARE	SQUARE	-
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	-	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	-
Peak Reflow Temperature (Celsius)	260	260	-	260	260	-
Certification status	Not Qualified	Not Qualified	-	Not Qualified	Not Qualified	-
Maximum seat height	1.1 mm	1.1 mm	-	1.1 mm	0.8 mm	-
Nominal slew rate	50 V/us	50 V/us	-	50 V/us	50 V/us	-
Supply voltage upper limit	11 V	11 V	-	11 V	11 V	-
Nominal supply voltage (Vsup)	5 V	5 V	-	5 V	5 V	-
surface mount	YES	YES	-	YES	YES	-
Temperature level	INDUSTRIAL	INDUSTRIAL	-	INDUSTRIAL	INDUSTRIAL	-
Terminal surface	Matte Tin (Sn)	Matte Tin (Sn)	-	Matte Tin (Sn)	Matte Tin (Sn)	-
Terminal form	GULL WING	GULL WING	-	GULL WING	NO LEAD	-
Terminal pitch	0.5 mm	0.5 mm	-	0.5 mm	0.5 mm	-
Terminal location	DUAL	DUAL	-	DUAL	QUAD	-
Maximum time at peak reflow temperature	30	30	-	30	30	-
width	3 mm	3 mm	-	3 mm	3 mm	-

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