AM461 [AME]

AMPLIFIER AND PROTECTION IC; 放大器和保护IC


型号：	AM461
厂家：	ANALOG MICROELECTRONICS
描述：	AMPLIFIER AND PROTECTION IC 放大器和保护IC 放大器
文件：	总8页 (文件大小：63K)
中文：	中文翻译
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AMPLIFIER AND PROTECTION IC

AM461

PRINCIPLE FUNCTION

Amplification of Single Ended Signals (Voltage)

Protection Functions for External Devices

Additional Adjustable Current/Voltage Source

V_CC= 6...35V

Input voltage

single ended

V_OUT= e.g. 0...5/10V

AM461

e.g. 0...1V, 0...5V

V_REF= z.B. 5V or 3.3V

I_S= 1.5mA

TYPICAL APPLICATIONS

• Impedance Converter

• Adjustable Voltage Source

• Voltage Regulator with Additional Functions

• Protection IC for Microcontroller (Frame ASIC Concept [1])

• Protected Current Source

analog microelectronics

An der Fahrt 13, 55124 Mainz, Germany

October 2002

Analog Microelectronics GmbH

Phone:

Fax:

+49 (0)6131/91 073 – 0

+49 (0)6131/91 073 – 30

info@analogmicro.info

1/8

Rev. 1.1

Internet: http://www.analogmicro.info

E–mail:

AMPLIFIER AND PROTECTION IC

AM461

TABLE OF CONTENTS

Features

Description

Block Diagram

Electrical Specifications

Block diagram and Pinout AM461

Principial Application Examples

Delivery

Additional Literature

TABLE OF FIGURES

Table1: Pinout AM461

Figure 1: Block diagram AM461

Figure 2: Block diagram AM461

Figure 3: Pinout AM461

Figure 4: Application as processor interface

Figure 5: Application as amplifiers IC and impedance converter

Figure 6: Application as voltage regulator and protection IC for controllers

analog microelectronics

October 2002

2/8

AMPLIFIER AND PROTECTION IC

AM461

FEATURES

DESCRIPTION

The AM461 is a universal useable amplifier and

protection IC with a multitude of additional func-

tions. The IC contains of an externally adjustable

operational amplifier for conditioning of single

ended input signals. This amplifier has an inte-

grated output driver stage with the ability to source

up to 5mA without the need of any external tran-

sistor. In addition, a voltage reference for the supply

of external components and another operational

amplifier that can be used as current/voltage source

or comparator is integrated.

• Supply Voltage Range: 6...35V

• Wide Operating Temperature Range:

–40°C...+85°C

• Voltage Reference: 5V

• Additional Voltage/Current Source

• Operational Amplifier Stage with Inte-

grated Driver Output

• Adjustable Gain

• Adjustable Output Voltage Range e.g.

0...5/10V, others

• Reverse Polarity Protection

• Short Circuit Protection

• Output Current Limitation

• Low-Cost: Replaces a Multitude Number

of Discrete Components

Basic features of the IC are the wide range inte-

grated of protection functions. The IC is protected

against reverse polarity and has a build-in output

current limitation. Using the amplifier IC AM461 it

is possible to generate stable standard voltages ranges

(e.g. 0-5/10V) in an easy and low-cost way.

BLOCK DIAGRAM

VREF

CVREF

AM461

CVSET

INP

Voltage Reference

VCC

OP2

V_BG

OP1

VOUT

GND

INN

Figure 1: Block diagram AM461

analog microelectronics

October 2002

3/8

AMPLIFIER AND PROTECTION IC

AM461

ELECTRICAL SPECIFICATIONS

T_amb= 25°C, V_CC= 24V, I_REF= 1mA, C₁= 2.2µF (unless otherwise noted)

Parameter

Symbol

V_CC

Conditions

Min.

Typ.

Max.

Unit

Voltage Range

Quiescent Current

I_CC

T_amb= – 40...+85°C, I_REF= 0mA

1.5

Temperature Specifications

Operating

T_amb

T_st

–40

–55

°C

Storage

125

150

Junction

T_J

°C

Thermal Resistance

DIL8 plastic package

SO8 plastic package

110

180

°C/W

Θ_ja

Voltage Reference

Voltage

V_REF

4.75

1.0

5.00

5.25

10.0

±140

Current

I_REF

V_REFvs. Temperature

Line Regulation

dV_REF/dT

dV_REF/dV

dV_REF/dI

T_amb= – 40...+85°C

V_CC= 6V...35V

±90

ppm/°C

ppm/V

%/mA

150

V_CC= 6V...35V, I_REF≈ 5mA

Load Regulation

0.05

0.06

0.10

0.15

I_REF≈ 5mA

Current/Voltage Source OP2

Internal Reference

V_BG

1.20

1.27

1.35

V_BGvs. Temperature

dV_BG/dT

T_amb= – 40...+85°C

±60

±140

ppm/°C

Current Source: I_CV= V_BG/R_SET

Adjustable Current Range

Output Voltage

I_CVREF

V_CVREF

V_CC– 4

V_CC< 18V

_CC≥ 18V

V_BG

Voltage Source: V_CV= V_BG(1 + R₄/ R₃)

Adjustable Voltage Range

V_CVREF

I_CVREF

C_CVREF

V_CC< 18V

_CC≥ 18V

0.4

V_CC– 4

Output Current

µA

Source, R₃+ R₄≥ 100kΩ

Sink

–100

Load Capacitance @ CVREF

Source mode

analog microelectronics

October 2002

4/8

AMPLIFIER AND PROTECTION IC

AM461

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Voltage Output Stage OP1

Adjustable Gain

G_OP1

Input Range

V_CC< 10V

_CC≥ 10V

V_CC– 5

Power Supply Rejection Ratio

Offset Voltage

PSRR

V_OS

±0.5

±3

±2

±7

µV/°C

V_OSvs. Temperature

Input Bias Current

dV_OS/dT

I_B

I_Bvs. Temperature

dI_B/dT

V_OUT

I_LIM

3.5

pA/°C

Output Voltage Range

V_CC< 18V

V_CC– 5

_CC≥ 18V

_OUT≥ 10V, R₁+ R₂≥ 100kΩ

Output Current Limitation

Output Current

Ω

I_OUT

R_OUT

R_L

Source

I_LIM

Output Resistance

0.5

Load Resistance

100

500

kΩ

Load Capacitance @ VOUT

Protection Functions

C_L

Protection against reverse polarity

Currents flowing into the IC are negative

Ground vs. V_CCvs. V_OUT, R₁≥ 20kΩ

BOUNDARY CONDITIONS

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Sum Gain Resistors

R₁+ R₂

R₃+ R₄

C₁

100

2.2

200

5.0

kΩ

µF

Sum Reference Adjustment Resistors

Stabilisation Capacitance @ VREF

1.9

analog microelectronics

October 2002

5/8

AMPLIFIER AND PROTECTION IC

AM461

BLOCK DIAGRAM AND PINOUT AM461

VREF

CVREF

AM461

CVSET

INP

Voltage Reference

OP2

VCC

V_BG

OP1

VOUT

GND

INN

Figure 2: Block diagram AM461

NAME

DESIGNATION

CVREF

CVSET

INP

VREF

GND

VCC

CVREF

CVSET

INP

Output OP2

Input OP2

Positive input OP1

Negative input OP1

Voltage output

INN

VOUT

VCC

Supply voltage

Figure 3: Pinout AM461

GND

VREF

IC ground

Output voltage reference

Table1: Pinout AM461

analog microelectronics

October 2002

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AMPLIFIER AND PROTECTION IC

AM461

PRINCIPLE APPLICATION EXAMPLES

•

Application as processor interface

Reverse polarity and

short circuit protection

6...35V

V_CVREF= 3.3V

V_REF= 5V

µP

AM461

e.g. 0...5/10V

Figure 4: Application as processor interface

•

Application as amplifier IC and impedance converter

Reverse polarity and

short circuit protection

6...35V

V_IN= 0...1, 0...5V

AM461

others

e.g. 0...5/10V

Figure 5: Application as amplifier IC and impedance converter

•

Application as voltage regulator and protection IC for controllers

6...35V

Reverse polarity and

short circuit protection

V_REF= 5V

AM461

µP

Figure 6: Application as voltage regulator and protection IC for controllers

analog microelectronics

October 2002

7/8

AMPLIFIER AND PROTECTION IC

AM461

DELIVERY

The AM461 amplifier and protection IC is available in

• DIP08, SO08

ADDITIONAL LITERATURE

[1] Concept of Frame ASICs: http://www.Frame-ASIC.com/

[2] Analog Microelectronics‘ Homepage: http://www.analogmicro.info/

NOTES

The information provided herein is believed to be reliable; however, Analog Microelectronics assumes no responsibility for inaccuracies or omissions. Analog Microelectronics assumes no responsibility for the

use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or licences to any of the circuits de-

scribed herein are implied or granted to any third party. Analog Microelectronics does not authorise or warrant any Analog Microelectronics product use in life support devices and/or systems.

analog microelectronics

October 2002

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AM461 [AME]

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