AM461

AMPLIFIER AND PROTECTION IC PRINCIPLE FUNCTION Amplification of Single Ended Signals (Voltage) Protection Functions for External Devices Additional Adjustable Current/Voltage Source AM461 VCC = 6...35V Input voltage single ended VOUT = e.g. 0...5/10V AM461 e.g. 0...1V, 0...5V VREF = z.B. 5V or 3.3V IS = 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 Analog Microelectronics GmbH An der Fahrt 13, 55124 Mainz, Germany Internet: http://www.analogmicro.info Phone: Fax: E–mail: +49 (0)6131/91 073 – 0 +49 (0)6131/91 073 – 30 info@analogmicro.info October 2002 1/8 Rev. 1.1 AMPLIFIER AND PROTECTION IC TABLE OF CONTENTS Features Description Block Diagram Electrical Specifications Block diagram and Pinout AM461 Principial Application Examples Delivery Additional Literature AM461 3 3 3 4 6 7 8 8 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 6 3 6 6 7 7 7 analog microelectronics October 2002 2/8 AMPLIFIER AND PROTECTION IC FEATURES • Supply Voltage Range: 6...35V • Wide Operating Temperature Range: –40°C...+85°C • Voltage Reference: 5V • Additional Voltage/Current Source • Operational Amplifier Stage with Integrated 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 AM461 DESCRIPTION The AM461 is a universal useable amplifier and protection IC with a multitude of additional functions. The IC contains of an externally adjustable operational amplifier for conditioning of single ended input signals. This amplifier has an integrated output driver stage with the ability to source up to 5mA without the need of any external transistor. 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. Basic features of the IC are the wide range integrated 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 CVREF 1 8 VREF AM461 CVSET 2 OP2 VBG INP 3 Voltage Reference 6 VCC OP1 5 VOUT 7 GND INN 4 Figure 1: Block diagram AM461 analog microelectronics October 2002 3/8 AMPLIFIER AND PROTECTION IC ELECTRICAL SPECIFICATIONS Tamb = 25°C, VCC = 24V, IREF = 1mA, C1 = 2.2µF (unless otherwise noted) Parameter Voltage Range Quiescent Current Temperature Specifications Operating Storage Junction Thermal Resistance Tamb Tst TJ Θja Θja Voltage Reference Voltage Current VREF vs. Temperature Line Regulation VREF IREF dVREF/dT dVREF/dV dVREF/dV Load Regulation dVREF/dI dVREF/dI Current/Voltage Source OP2 Internal Reference VBG vs. Temperature Current Source: ICV = VBG/RSET Adjustable Current Range Output Voltage ICVREF VCVREF VCVREF Voltage Source: VCV = VBG (1 + R4 / R3) Adjustable Voltage Range VCVREF VCVREF Output Current ICVREF ICVREF Load Capacitance @ CVREF CCVREF VCC < 18V VCC ≥ 18V Source, R3 + R4 ≥ 100kΩ Sink Source mode 0 1 0.4 0.4 VCC < 18V VCC ≥ 18V 0 VBG VBG VBG dVBG/dT Tamb = – 40...+85°C 1.20 1.27 ±60 IREF ≈ 5mA Tamb = – 40...+85°C VCC = 6V...35V VCC = 6V...35V, IREF ≈ 5mA 4.75 1.0 ±90 30 60 0.05 0.06 5.00 DIL8 plastic package SO8 plastic package 110 180 –40 –55 Symbol VCC ICC Tamb = – 40...+85°C, IREF = 0mA Conditions Min. 6 Typ. AM461 Max. 35 1.5 Unit V mA 85 125 150 °C °C °C °C/W °C/W 5.25 10.0 ±140 80 150 0.10 0.15 V mA ppm/°C ppm/V ppm/V %/mA %/mA 1.35 ±140 V ppm/°C 10 VCC – 4 13 mA V V VCC – 4 13 10 –100 10 V V mA µA nF analog microelectronics October 2002 4/8 AMPLIFIER AND PROTECTION IC Parameter Voltage Output Stage OP1 Adjustable Gain Input Range GOP1 IR IR Power Supply Rejection Ratio Offset Voltage VOS vs. Temperature Input Bias Current IB vs. Temperature Output Voltage Range PSRR VOS dVOS/dT IB dIB/dT VOUT VOUT Output Current Limitation Output Current Output Resistance Load Resistance Load Capacitance @ VOUT Protection Functions Protection against reverse polarity Ground vs. VCC vs. VOUT, R1 ≥ 20kΩ ILIM IOUT ROUT RL CL VCC < 18V VCC ≥ 18V VOUT ≥ 10V, R1 + R2 ≥ 100kΩ Source Source 2 0 0 0 5 0 0.5 10 7 VCC < 10V VCC ≥ 10V 1 0 0 80 90 ±0.5 ±3 5 3.5 Symbol Conditions Min. Typ. AM461 Max. Unit VCC – 5 5 V V dB ±2 ±7 12 10 VCC – 5 13 10 ILIM 100 500 mV µV/°C nA pA/°C V V mA mA Ω kΩ nF 35 V Currents flowing into the IC are negative BOUNDARY CONDITIONS Parameter Sum Gain Resistors Sum Reference Adjustment Resistors Stabilisation Capacitance @ VREF Symbol R1 + R2 R3 + R4 C1 Conditions Min. 20 20 1.9 Typ. 100 100 2.2 Max. 200 200 5.0 Unit kΩ kΩ µF analog microelectronics October 2002 5/8 AMPLIFIER AND PROTECTION IC BLOCK DIAGRAM AND PINOUT AM461 AM461 CVREF 1 8 VREF AM461 CVSET 2 OP2 VBG INP 3 Voltage Reference 6 VCC OP1 5 VOUT 7 GND INN 4 Figure 2: Block diagram AM461 PIN NAME CVREF CVSET INP INN VOUT VCC GND VREF DESIGNATION Output OP2 Input OP2 Positive input OP1 Negative input OP1 Voltage output Supply voltage IC ground Output voltage reference CVREF CVSET INP INN 1 2 3 4 8 7 6 5 VREF GND VCC VOUT Figure 3: Pinout AM461 1 2 3 4 5 6 7 8 Table1: Pinout AM461 analog microelectronics October 2002 6/8 AMPLIFIER AND PROTECTION IC PRINCIPLE APPLICATION EXAMPLES • Application as processor interface AM461 Reverse polarity and short circuit protection VCVREF = 3.3V VREF = 5V 6...35V µP D AM461 A Figure 4: Application as processor interface e.g. 0...5/10V • Application as amplifier IC and impedance converter Reverse polarity and short circuit protection 6...35V VIN = 0...1, 0...5V others AM461 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 VREF = 5V µP AM461 Figure 6: Application as voltage regulator and protection IC for controllers analog microelectronics October 2002 7/8 AMPLIFIER AND PROTECTION IC DELIVERY The AM461 amplifier and protection IC is available in • DIP08, SO08 AM461 ADDITIONAL LITERATURE [1] [2] Concept of Frame ASICs: http://www.Frame-ASIC.com/ 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 described 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 8/8