Wide Supply Voltage Range: 6.35V Wide Operating Temperature Range: -40

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Wide Supply Voltage Range: 6.35V Wide Operating Temperature Range: -40

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VOLTAGE TRANSMITTER
Wide Supply Voltage Range: 6.35V Wide Operating Temperature Range: -40°C.+85°C Adjustable Voltage Reference: Additional Current/Voltage Source Instrumentation Amplifier Input (Reversible Polarity) Operation Amplifier Input Adjustable Gain Offset Adjustable Output Voltage Range: 0.5.4.5V, 0.5/10V, other Protection Against Reverse Polarity Output Current Limitation
AM401
GENERAL DESCRIPTION
AM401 cost monolithic voltage transmitter, designed flexible bridge input signal conditioning. integrated circuit ideally suited wide variety transducers with differential output signal. contains high accuracy instrumentation amplifier differential input signals, operational amplifier output stage, adjustable reference. addition these functional elements auxiliary operational amplifier used current voltage source. Output range gain adjustable external resistors. Using internal instrumentation amplifier AM401 standard sensor transmitter with possibility indicate over range signal. With freely connectable operational amplifier input this used adjustable voltage-to-voltage transmitter.
APPLICATIONS
Industrial Process Control Sensor Transmitter (e.g. pressure) Voltage Transmitter
DELIVERY
DIL16 packages (samples) SO16(n) packages Dice blue foil
BLOCK DIAGRAM+
CVREF VSET VREF
AM401
CVSET Output Stage Reference Voltage
VOUT
OUTIA
INOP
GAIN
Figure
analog microelectronics
Analog Microelectronics GmbH Fahrt 55124 Mainz Internet: http://www.analogmicro.de Phone: (0)6131/91 Fax: (0)6131/91 E-Mail: info@analogmicro.de
April 1/10 Rev.
VOLTAGE TRANSMITTER
ELECTRICAL SPECIFICATIONS
Tamb 25°C, 24V, VREF IREF (unless otherwise noted)
Parameter Voltage Range Quiescent Current Temperature Specifications Operating Storage Junction Thermal Resistance Tamb Voltage Reference Voltage VREF VREF Trim Range Current VREF Temperature Line Regulation VR10 IREF dVREF/dT dVREF/dV dVREF/dV Load Regulation dVREF/dI dVREF/dI Load Capacitance Current/Voltage Source Internal Reference Temperature Current Source: VBG/REXT Adjustable Current Range Output Voltage Voltage Source: (REXT1 REXT2) REXT2 Adjustable Voltage Range Output Current Load Capacitance Instrumentation Amplifier Internal Gain Differential Input Voltage Range Common Mode Input Range CMIR CMIR Common Mode Rejection Ratio Power Supply Rejection Ratio Offset Voltage Temperature Input Bias Current Temperature CMRR PSRR dVOS/dT dIB/dT ±1.5 -120 -0.35 Source Sink Source mode dVBG/dT Tamb 40.+85°C 1.20 1.27 IREF Tamb 40.+85°C 6V.35V 6V.35V, IREF VSET connected VSET GND, 4.75 0.05 0.06 5.00 10.0 DIL16 plastic package SO16 narrow plastic package Symbol Tamb 40.+85°C, IREF Conditions Min. Typ.
AM401
Max.
Unit
°C/W °C/W
5.25 10.5 VR10 10.0 ±140 0.10 0.15
ppm/°C ppm/V ppm/V %/mA %/mA
1.35 ±140
ppm/°C
-100
±400 µV/°C -300 -0.8 nA/°C
analog microelectronics
April 2/10
VOLTAGE TRANSMITTER
Parameter Instrumentation Amplifier (cont.) Output Voltage Range VOUTIA VOUTIA Minimum Output Voltage Load Capacitance Zero Adjust Stage Internal Gain Input Voltage Offset Voltage Temperature Input Bias Current Temperature Voltage Output Stage Adjustable Gain Input Range Power Supply Rejection Ratio Offset Voltage Temperature Input Bias Current Temperature Output Voltage Range PSRR dVOS/dT dIB/dT VOUT VOUT Output Current Limitation Output Current Load Resistance Load Capacitance Protection Functions Protection against reverse polarity System Parameters Nonlinearity ideal input 0.05 Ground VOUT ILIM IOUT VOUT ±0.5 dVOS/dT dIB/dT VOUTIA ±0.5 ±1.6 VOUTIAmin RLIA RLIA without external load resistance RLIA Symbol Conditions Min. Typ.
AM401
Max. Unit
VOUTIA ±2.0
µV/°C pA/°C
ILIM
µV/°C pA/°C
0.15
Depending external load resistance output (RLIA VOUTIA 3mV); internal load resistance 100k Currents flowing into negative
BOUNDARY CONDITIONS
Parameter Gain Resistors Offset Resistors VREF Capacitance Capacitance Symbol Conditions only sink mode reference Min. Typ. Max. Unit
analog microelectronics
April 3/10
VOLTAGE TRANSMITTER
FUNCTIONAL DIAGRAM
Voltage Reference Current Source
AM401
VOUT
Ground
Figure
FUNCTIONAL DESCRIPTION
AM401 integrated voltage transmitter bridge input signals. With variations external components output voltage adjusted over wide range. addition resistors circuitry needs only external capacitors basic application. Using input voltage output stage AM401 used single ended input signals well. Typical values external components listed Application Notes. Basically AM401 consists functional blocks they shown Figure high accuracy instrumentation amplifier with internal gain possibility adjust bias voltage (pin differential input signals. operational amplifier output stage used voltage transmission voltage output. output stage output current limitation protecting adjustable voltage reference (VSET N.C. VSET GND) used excitation constant voltage sensors supply other external devices. auxiliary operational amplifier which used additional current/voltage source adjustment bias offset voltage (see Application Notes). transfer function output voltage instrumentation amplifier VOUTIA IAVIN with offset voltage which adjusted zero adjust Using circuitry with additional operational amplifier like shown figure this offset voltage calculated
analog microelectronics
April 4/10
VOLTAGE TRANSMITTER
VOFFSET
AM401
entire output voltage VOUT valid VOUT VINOP with adjustable gain
minimum supply voltage, which adjusted, calculated VOUTmax Important: used blocks like auxiliary Application have connected. capacitors have connected every case well! Even voltage reference used.
analog microelectronics
April 5/10
VOLTAGE TRANSMITTER
PINOUT
NAME CVREF CVSET OUTIA INOP GAIN VOUT N.C. N.C. VSET VREF N.C.
AM401
DESIGNATION Current/Voltage Reference Current/Voltage Inverting Bridge Input Inverting Bridge Input Output Instrumentation Amplifier Input Operational Amplifier Gain Adjustment Voltage Output Connected Connected Supply Voltage Voltage Select Zero Adjust Ground Reference Voltage Connected
CVREF CVSET OUTIA INOP GAIN VOUT
N.C. VREF VSET N.C. N.C.
Figure
DELIVERY
AM401 available version: packages (samples) packages Dice blue foil
PACKAGE DIMENSIONS SO16
10,06 1,45 0,05 0,42 0,07 1,27 0,635 0°-10°
2,00
Figure
analog microelectronics
April 6/10
VOLTAGE TRANSMITTER
APPLICATION OUTPUT VOLTAGE 0.10V
VREF Reference Voltage
AM401
AM401
VOUT
Ground
Figure Used 0.10V output application zero adjust (ZA) connected Ground (Figure Gain adjusted external resistors calculated transfer function output voltage VOUT becomes VOUT With these equations external resistors adjusted VOUT Example Output voltage range 0.10V this case values external devices (VIN 0.50mV, R1/R2 follows 2.2µF 10nF
Example Output voltage range 0.5V this case values external devices (VIN 0.100mV, R1/R2 follows 2.2µF 10nF
analog microelectronics
April 7/10
VOLTAGE TRANSMITTER
APPLICATION CURRENT DRIVEN SENSORS
Reference Voltage
AM401
RREF
AM401
RSET
VOUT
Ground
Figure this application auxiliary operational amplifier used current source. values external components calculated 0.5V output. application zero adjust (ZA) connected Ground (Figure Gain adjusted external resistors calculated transfer function output voltage VOUT becomes VOUT With these equations external resistors adjusted VOUT excitation current sensor calculated over RSET
Example Output voltage range 0.5V values external devices (VIN 0.100mV, R1/R2 1.5mA, 1.27V) RSET 846.7 RREF 2.2µF 10nF
analog microelectronics
April 8/10
VOLTAGE TRANSMITTER
APPLICATION OUTPUT VOLTAGE 0.5.4.5V
VREF VOFFSET Reference Voltage
AM401
AM401
VOUT
Ground
Figure Used 0.5.4.5V output application zero adjust (ZA) connected offset voltage VOFFSET (Figure Gain adjusted external resistors calculated transfer function output voltage VOUT becomes VOUT VOFFSET offset voltage calculated VOFFSET VREF VOFFSET
With these equations external resistors adjusted VOUT VOFFSET Example Output voltage range 0.5.4.5V this case values external devices (VIN 0.250mV, VREF R1/R2 2.2, R3/R4 follows 100k VOFFSET 0.5V 2.2µF 10nF
analog microelectronics
April 9/10
VOLTAGE TRANSMITTER
TOPOLOGIE 0.10V APPLICATION
N.C. N.C. N.C.
AM401
AM401
VOUT
Ground
Figure
TOPOLOGIE 0.5.4.5V APPLICATION
N.C. N.C. N.C.
AM401
VOUT
Ground
Figure
information provided herein believed reliable; however, Analog Microelectronics assumes responsibility inaccuracies omissions. Analog Microelectronics assumes responsibility this information, such information shall entirely user's risk. Prices specifications subject change without notice. patent rights licences circuits described herein implied granted third party. Analog Microelectronics does authorise warrant Analog Microelectronics product life support devices and/or systems.
analog microelectronics
April 10/10

Wide Supply Voltage Range: 6.35V Wide Operating Temperature Range: -40

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