AM461 AME | Alldatasheet
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AMPLIFIER AND PROTECTION IC AM461 analog microelectronics October 2002 Analog Microelectronics GmbH Phone: +49 (0)6131/91 073 – 0 1/8 An der Fahrt 13, 55124 Mainz, Germany Fax: +49 (0)6131/91 073 – 30 Rev. 1.1 Internet: http:// www.analogmicro.info E–mail: info@analogmicro .info PRINCIPLE FUNCTION Amplification of Single Ended Signals (Voltage) Protection Functions for External Devices Additional Adjustable Current/Voltage Source VREF = z.B. 5V or 3.3V AM461 VCC = 6...35V IS = 1.5mA Input voltage single ended TYPICAL APPLICATIONS
- Impedance Converter
- Adjustable Voltage Source
- Voltage Regulator with Additional Functions
- Protection IC for Microcontroller (Frame ASIC Concept [ 1])
- Protected Current Source
AMPLIFIER AND PROTECTION IC AM461 analog microelectronics October 2002
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 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
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. Basic features of the IC are the wide range inte- grated of protection func tions. The IC is protected against reverse polarity and has a build-in output current limitation. Using the amplifier IC AM 461 it is possible to generate stable standard voltages ranges (e.g. 0-5/10V) in an easy and low-cost way. BLOCK DIAGRAM VREF VOUT GND INN VCC CVREF CVSET VBG V oltage Reference AM461 OP2 OP1 INP 7 4 Figure 1: Block diagram AM461
AMPLIFIER AND PROTECTION IC AM461 analog microelectronics October 2002 ELECTRICAL SPECIFICATIONS Tamb = 25°C, VCC = 24V, IREF = 1mA, C1 = 2.2µF (unless otherwise noted) Parameter Symbol Conditions Min. Typ. Max. Unit Voltage Range VCC 63 5 V Quiescent Current ICC Tamb = – 40...+85°C, IREF = 0mA 1.5 mA Temperature Specifications Operating Tamb –40 85 °C Storage Tst –55 125 °C Junction TJ 150 °C Thermal Resistance Θja DIL8 plastic package 110 °C/W Θja SO8 plastic package 180 °C/W Voltage Reference Voltage VREF 4.75 5.00 5.25 V Current IREF 1.0 10.0 mA VREF vs. Temperature d VREF/dTT amb = – 40...+85°C ±90 ±140 ppm/°C Line Regulation d VREF/dVV CC = 6V...35V 30 80 ppm/V dVREF/dV VCC = 6V...35V, IREF ≈ 5mA 60 150 ppm/V Load Regulation d VREF/dI 0.05 0.10 %/mA dVREF/dI IREF ≈ 5mA 0.06 0.15 %/mA Current/Voltage Source OP2 Internal Reference VBG 1.20 1.27 1.35 V VBG vs. Temperature d VBG/dTT amb = – 40...+85°C ±60 ±140 ppm/°C Current Source: ICV = VBG/RSET Adjustable Current Range ICVREF 01 0 m A Output Voltage VCVREF VCC < 18V VBG VCC – 4 V VCVREF VCC ≥ 18V VBG 13 V Voltage Source: VCV = VBG (1 + R4 / R3) Adjustable Voltage Range VCVREF VCC < 18V 0.4 VCC – 4 V VCVREF VCC ≥ 18V 0.4 13 V Output Current ICVREF Source, R3 + R4 ≥ 100kΩ 10 mA ICVREF Sink –100 µA Load Capacitance @ CVREF C CVREF Source mode 0 1 10 nF
AMPLIFIER AND PROTECTION IC AM461 analog microelectronics October 2002 Parameter Symbol Conditions Min. Typ. Max. Unit Voltage Output Stage OP1 Adjustable Gain GOP1 1 Input Range IR V CC < 10V 0 VCC – 5 V IR VCC ≥ 10V 05 V Power Supply Rejection Ratio PSRR 80 90 dB Offset Voltage VOS ±0.5 ±2m V VOS vs. Temperature d VOS/dT ±3 ±7µ V / ° C Input Bias Current IB 51 2 n A IB vs. Temperature d IB/dT 3.5 10 pA/°C Output Voltage Range VOUT VCC < 18V 0 VCC – 5 V VOUT VCC ≥ 18V 01 3 V Output Current Limitation ILIM VOUT ≥ 10V, R1 + R2 ≥ 100kΩ 57 1 0 m A Output Current IOUT Source 0 ILIM mA Output Resistance ROUT Source 0.5 Ω Load Resistance RL 2 10 100 kΩ Load Capacitance @ VOUT C L 0 500 nF Protection Functions Protection against reverse polarity Ground vs. VCC vs. VOUT, R1 ≥ 20kΩ 35 V Currents flowing into the IC are negative BOUNDARY CONDITIONS Parameter Symbol Conditions Min. Typ. Max. Unit Sum Gain Resistors R1 + R2 20 100 200 kΩ Sum Reference Adjustment Resistors R3 + R4 20 100 200 kΩ Stabilisation Capacitance @ VREF C 1 1.9 2.2 5.0 µF
AMPLIFIER AND PROTECTION IC AM461 analog microelectronics October 2002 BLOCK DIAGRAM AND PINOUT AM461 CVREF CVSET INP VREF VCC VOUT GND INN Figure 3: Pinout AM461 PIN NAME DESIGNATION
1 CVREF Output OP2
2 CVSET Input OP2
3 INP Positive input OP1
4 INN Negative input OP1
5 VOUT Voltage output
6 VCC Supply voltage
7 GND IC ground
8 VREF Output voltage reference
Table1: Pinout AM461 VREF VOUT GND INN VCC CVREF CVSET VBG V oltage Reference AM461 OP2 OP1 INP 7 4 Figure 2: Block diagram AM461
AMPLIFIER AND PROTECTION IC AM461 analog microelectronics October 2002 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.