AMPLIFIER AND PROTECTION IC AM461 PRINCIPLE FUNCTION Amplification of Single Ended Signals (Voltage) Protection Functions for External Devices Additional Adjustable Current/Voltage Source 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 [email protected] October 2002 1/8 Rev. 1.1 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 3 3 3 4 6 7 8 8 TABLE OF FIGURES Table1: Pinout AM461 6 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 3 6 6 7 7 7 analog microelectronics October 2002 2/8 AMPLIFIER AND PROTECTION IC AM461 FEATURES DESCRIPTION • 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 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 VREF CVREF 1 8 AM461 CVSET 2 OP2 Voltage Reference 6 VCC VBG INP 3 OP1 5 VOUT 7 GND 4 INN Figure 1: Block diagram AM461 analog microelectronics October 2002 3/8 AMPLIFIER AND PROTECTION IC AM461 ELECTRICAL SPECIFICATIONS Tamb = 25°C, VCC = 24V, IREF = 1mA, C1 = 2.2µF (unless otherwise noted) Parameter Symbol Voltage Range VCC Quiescent Current ICC Conditions Min. Typ. 6 Tamb = – 40...+85°C, IREF = 0mA Max. Unit 35 V 1.5 mA Temperature Specifications Operating Tamb –40 85 °C Storage Tst –55 125 °C Junction TJ Thermal Resistance Θja DIL8 plastic package 110 °C/W Θja SO8 plastic package 180 °C/W 150 °C Voltage Reference Voltage VREF 4.75 Current IREF 1.0 VREF vs. Temperature dVREF/dT Tamb = – 40...+85°C Line Regulation dVREF/dV VCC = 6V...35V dVREF/dV VCC = 6V...35V, IREF ≈ 5mA Load Regulation dVREF/dI dVREF/dI IREF ≈ 5mA 5.00 5.25 V 10.0 mA ±90 ±140 ppm/°C 30 80 ppm/V ppm/V 60 150 0.05 0.10 %/mA 0.06 0.15 %/mA Current/Voltage Source OP2 Internal Reference VBG VBG vs. Temperature dVBG/dT 1.20 1.27 1.35 V ±60 ±140 ppm/°C 0 10 mA Tamb = – 40...+85°C Current Source: ICV = VBG/RSET Adjustable Current Range Output Voltage ICVREF VCVREF VCC < 18V VBG VCC – 4 V VCVREF VCC ≥ 18V VBG 13 V VCVREF VCC < 18V 0.4 VCC – 4 V 0.4 13 V 10 mA –100 µA 10 nF Voltage Source: VCV = VBG (1 + R4 / R3) Adjustable Voltage Range VCVREF VCC ≥ 18V Output Current ICVREF Source, R3 + R4 ≥ 100kΩ ICVREF Sink Load Capacitance @ CVREF CCVREF Source mode analog microelectronics 0 1 October 2002 4/8 AMPLIFIER AND PROTECTION IC Parameter Symbol Conditions AM461 Min. Typ. Max. Unit Voltage Output Stage OP1 Adjustable Gain GOP1 Input Range IR VCC < 10V 0 VCC – 5 V IR VCC ≥ 10V 0 5 V ±0.5 ±2 mV µV/°C Power Supply Rejection Ratio PSRR Offset Voltage VOS 1 80 90 dB VOS vs. Temperature dVOS/dT ±3 ±7 Input Bias Current IB 5 12 nA IB vs. Temperature dIB/dT 3.5 10 pA/°C Output Voltage Range VOUT VCC < 18V 0 VCC – 5 V VOUT VCC ≥ 18V 0 13 V Output Current Limitation ILIM VOUT ≥ 10V, R1 + R2 ≥ 100kΩ 5 Output Current IOUT Source 0 Output Resistance ROUT Source Load Resistance RL 2 Load Capacitance @ VOUT CL 0 7 10 mA ILIM mA 100 kΩ 500 nF 35 V Ω 0.5 10 Protection Functions Ground vs. VCC vs. VOUT, R1 ≥ 20kΩ Protection against reverse polarity Currents flowing into the IC are negative BOUNDARY CONDITIONS Parameter Symbol Sum Gain Resistors R1 + R2 Sum Reference Adjustment Resistors Stabilisation Capacitance @ VREF Min. Typ. Max. Unit 20 100 200 kΩ R3 + R4 20 100 200 kΩ C1 1.9 2.2 5.0 µF analog microelectronics Conditions October 2002 5/8 AMPLIFIER AND PROTECTION IC AM461 BLOCK DIAGRAM AND PINOUT AM461 VREF CVREF 1 8 AM461 CVSET 2 OP2 Voltage Reference 6 VCC VBG INP 3 OP1 5 VOUT 7 GND 4 INN Figure 2: Block diagram AM461 CVREF 1 8 VREF CVSET 2 7 GND INP 3 6 VCC INN 4 5 VOUT Figure 3: Pinout AM461 PIN NAME 1 2 3 4 5 6 7 8 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 Table1: Pinout AM461 analog microelectronics October 2002 6/8 AMPLIFIER AND PROTECTION IC AM461 PRINCIPLE APPLICATION EXAMPLES • Application as processor interface Reverse polarity and short circuit protection VCVREF = 3.3V µP 6...35V VREF = 5V D AM461 A 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 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 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 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