Supply Voltage 5V±5% (Ratio Range) Wide Operating Temperature Range: -

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Supply Voltage 5V±5% (Ratio Range) Wide Operating Temperature Range: -

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RATIOMETRIC VOLTAGE TRANSMITTER
Supply Voltage 5V±5% (Ratio Range) Wide Operating Temperature Range: -40°C.+100°C Ratiometrical Current Source Transducer Excitation Instrumentation Amplifier Input Voltage Output Driver Open Collector: VOUT 0.5-4.5V IOUT +10mA Adjustable Gain, Offset, Output Voltage Range Small Package Dimensions: Cost
AM417
GENERAL DESCRIPTION
AM417 cost ratiometrical voltage transmitter, designed flexible bridge input signal conditioning. contains ratiometric current source transducer excitation, high accuracy instrumentation amplifier differential input signals, voltage output driver. Gain, offset, output voltage range adjustable external resistors. voltage output stage designed open collector stage. output current +10mA. simple current limitation possible adding external resistor. With functional blocks possibilities adjust important parameters sensor calibration, small package dimensions (SO8), costs AM417 ideally suited automotive sensor interface applications.
APPLICATIONS
Industrial Process Control Automotive Applications Sensor Transmitter
DELIVERY
DIL8 packages (samples) SOP8 packages Dice blue foil
BLOCK DIAGRAM
AM417
Output Stage
VOUT
Figure
analog microelectronics
Analog Microelectronics GmbH Fahrt 55124 Mainz Internet: www.analogmicro.de Phone: (0)6131/91 Fax: (0)6131/91 E-Mail: info@analogmicro.de
April Rev.
RATIOMETRIC VOLTAGE TRANSMITTER
ELECTRICAL SPECIFICATIONS
Tamb 25°C, (unless otherwise noted)
Parameter Voltage Range (Ratio Range) Maximum Supply Voltage Quiescent Current Temperature Specifications Operating Storage Junction Thermal Resistance Tamb Ratiometric Current Source Transducer Internal Sense Voltage Output Current Range Output Current Ratiometric Error RAT@IB ratiometric with VCC, 500, VVCC VVCC 5.25V, RAT@IB 1.05 (VVCC (VVCC 5.25V) 1.25mA 1mA, UIB/IIB, VVIB 4.75V 5.25V, VVIB ratiometric with VCC, VVCC 0.50 0.98 DIL8 plastic package plastic package Symbol VCCmax 500, Conditions Min. 4.75 Typ.
AM417
Max. 5.25
Unit
°C/W °C/W
1.25 1.02
Temperature Output Voltage Range Output Resistance Power Supply Rejection Ratio Instrumentation Amplifier Input Voltage Range Internal Gain Common Mode Rejection Ratio Power Supply Rejection Ratio Offset Voltage Temperature Input Bias Current Output Voltage Range Output Resistance Nonlinearity Voltage Output Stage Adjustable Gain Input Voltage Range Power Supply Rejection Ratio Offset Voltage Temperature Input Current Output Voltage Range
dIRB/dT
VCC-0.5
ppm/°C
VIN+;- CMRR PSRR dVOS/dT VVIA ROUT 200mV, ideal input VIN- 200mV VVIA/VIN
10.0
VCC-2 10.2
µV/°C
VCC-2
GOUT PSSR dVOS/dT VOUT 50mV 50mV with transistor BCW68H IOUT 10mA (see figure
VCC-2.5 ±3.0 µV/°C
analog microelectronics
April
RATIOMETRIC VOLTAGE TRANSMITTER
Parameter Voltage Output Stage (cont.) Output Current Output Current VOUT Current Limitation Threshold VTHRESH Temperature Output Resistance Linearity IOUT IVOUT VTHRESH dVTHRESH ROUT with transistor BCW68H VOUT VTHRESH VVCC VVOUTmin, IOUT 14mA -40.+100°C virtual ideal input 1.00 Symbol Conditions Min. Typ.
AM417
Max. Unit
12.5 1.15 0.85 0.01
BOUNDARY CONDITIONS
Parameter Resistor Adjustment Current Source (Transducer) Gain Resistor Capacitor Power Supply Capacitor Frequency Compensation (Output Stage) Capacitor Load (Output Stage) Resistor Sense Current Limitation Symbol 10.0 Conditions Min. Typ. Max. 1000 Unit
FUNCTIONAL DIAGRAM
(ratriometrical)
GAIN 20.110
VOUT
Ground
Figure
analog microelectronics
April
RATIOMETRIC VOLTAGE TRANSMITTER
FUNCTIONAL DESCRIPTION
AM417
AM417 integrated cost ratiometric voltage transmitter specially designed bridge input signals automotive applications. With integrated, ratiometrical current source AM417 ideally suited signal conditioning piezoresistive pressure transducers allows easy temperature compensation span adjustment these kinds sensors. AM417 consists basic functional blocks: Ratiometrical Current Source transducer excitation: current adjusted variation resistor following relation: VVCC
Instrumentation Amplifier Input Stage with fixed gain pre-amplifiing bridge input signal. Open Collector Output Stage with following functions: Voltage Output: output used voltage amplifier which external PNP-open collector stage which able push maximum current IOUT 5mA. gain GOUT adjustable external resistors between GOUT 2.11: GOUT
gain complete system becomes then GOUT. Current Limitation: simple clamp stage output VOUT limits voltage drop against VOUT VVCC maximum current adding resistor series Emitter transistor output stage (see figure maximum output current valid: VTRESH 370mV
current limitation required, Emitter transistor directly connected proper thermic coupling Transistor (VBE-Drift: -2mV/°C typ.) AM417 reduces resulting temperature drift IOUT increases performance current limitation. Adjustment Output Voltage Range span output voltage could adjusted gain GOUT output stage. offset output voltage adjusted same adjustment sensor offset using resistors (figure
analog microelectronics
April
RATIOMETRIC VOLTAGE TRANSMITTER
PINOUT
NAME VOUT Ground Output Current Source
AM417
DESIGNATION
VOUT
Adjustment Current Source Input Positive Input Negative Adjustment Gain Output Stage Output Stage Supply Voltage
Figure
DELIVERY
AM417 available packages (samples) packages Dice blue foil
PACKAGE DIMENSIONS SOP8
4,98 1,45 0,05 0,42 0,07 1,27 0,635 0°-10°
2,00
Figure
analog microelectronics
April
RATIOMETRIC VOLTAGE TRANSMITTER
APPLICATION OUTPUT VOLTAGE 0.5.4.5V
AM417
RTCO1 RTCO2
AM417
Output Stage
VOUT
RTCS
Ground
Figure current application shows basic functions AM417. With given values external components (see List External Components) following application features adjusted: 100mV GOUT VOUT 4.5V IOUT +10mA 0.25mA (ratiometrical supply current pressure transducer)
LIST EXTERNAL COMPONENTS
Symbol RTCS RO1, RTCO1, RTCO2 Description BCW68H, BC557C similar) IOUT 10mA (100°C) Value drop, high at10mA (typ.) 10.0 Unit
Span (Gain adjustment) VOUT
typical transducer resistor span compensation Offset adjustment offset adjustment
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

Supply Voltage 5V±5% (Ratio Range) Wide Operating Temperature Range: -

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