Wide Supply Voltage Range 2.1V (9V) (4)-Wire 2-Wire Applications Simul

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Wide Supply Voltage Range 2.1V (9V) (4)-Wire 2-Wire Applications Simul

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SWITCHING INTERFACE
Wide Supply Voltage Range 2.1V (9V) (4)-Wire 2-Wire Applications Simultaneous Outputs Point Point Switch PNP- NPN-Type Available Three Comparators Switch Control Functions Adjustable Gain between Adjustable Threshold Hysteresis Short Circuit Protection Short Circuit Voltage Status Output Signals Adjustable Disturbance Suppression LEDs Detailed Status Report
AM337
GENERAL DESCRIPTION
AM337 monolithic analog/digital interface designed switching applications. circuit 3-wire switch suited most differential transducers such strain gauges, magnetoresistive elements, thermocouples etc. single ended sensors such inductive capacitive distance sensors AM337 used 2-wire applications. AM337 PNP- NPN-output (pin select) allows simultaneously NO-operation. combinations current sources, current sinks high resistance outputs programmable. short circuit detection, pulsed short circuit protection defined state circuit case lower voltage part integrated security system. Short circuit- voltage-status signals transmitted directly external processor. adjustable signal delay some internal hysteresises protect AM337 against makes universal industrial switching applications.
APPLICATIONS
Industrial Process Control Differential Transducer Switch Circuit Grounded Transducer Switch Circuit Automated Manufacturing Factory Automation
BLOCK DIAGRAM
STABP/N AUXIN TRESH3IN AUXOUT SCDIN
Current Voltage Supply
Auxiliary Comparator
Short Circuit Detection
SCDOUT SENSEIN
AOUT
Comp1
Delay
Output
OUT1I OUT1
Logic GAIN VIN+ VIN- Instrumentation Amplifier
OUT2
LED1 Comp2 LED2 Oscillator THRESH2IN HYSTIN CDELAY
THRESH1IN
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
SWITCHING INTERFACE
ABSOLUTE MAXIMUM RATINGS
Supply Voltage Junction Temperature Storage Temperature Range Operating Temperature Range Tamb 150°C -40.125°C -40.85°C
AM337
ELECTRICAL SPECIFICATIONS
Tamb -40.85°C, (unless otherwise noted)
Parameter Supply Supply Current (without LED) Supply Voltage Voltage Source 1.8V @25°C Temperature Coefficient Voltage Source @25°C Temperature Coefficient Voltage Source Temperature Drift from 8V-Regulator Lower Voltage Detection Difference Amplifier Output Signal Range Gain Linearity Temperatur Coefficient Offset Voltage Offset Voltage Drift Input Common Mode Range Common Mode Rejection Transit Frequency Transit Frequency dVOS/dT ICMR CMRR (-3dB) 160/overmod. 0.60°C 0.033 5.25 VOUT RG1+RG2 0.60°C V2-1.5 0.2% mV/°C 2.1V 8.5V IOUT ISINK 100µA IOUT IOUT ISINK 40°C.90°C 2.1V V2-150 V2-300 1.71 ±200 ±200 V2/2 1.89 ppm/°C ppm/°C ppm/°C Symbol Conditions Min. Typ. Max. Unit
V2/2-75
V2/2+75 V2-450
analog microelectronics
April
SWITCHING INTERFACE
Parameter Comparator Internal Threshold Internal Threshold Internal Hysteresis (Comp. Adjustable Threshold 1-Range Adjustable Threshold 2-Range Adjustable Hysteresis Internal Resistor Internal Resistor Short Circuit Detection Short Circuit Threshold p-Type Short Circuit Threshold n-Type Scanning Duty Cycle (Short Circuit) Adjustable Scanning Time Aux. Comparator Threshold Range Disruptive Suppression Signal Delay Output Stages Output Current (OUT1/OUT1I) Output Current (OUT1/OUT1I) Output Current Comp VLOW Current LED1 LED2 IPNP INPN ISINK ISINK ILED 1.08 -0.72 6.89 1.59 -1.06 CDELAY 0.24 CSCD with reference with reference 1:500 0.25 with reference RI3/RI4 HYSI VTH1 VTH2 VTH1-75 VTH2-75 0.8+HYS 0.8+HYS Symbol Conditions Min. Typ.
AM337
Max. Unit
VTH1+75 VTH2+75 V2-1.5 V2-1.5
0.75 -1.4 9.51
Saturation Current Source ILED Output Voltage Output Detection Frequency
V2-0.5
BOUNDARY CONDITIONS
Parameter Adjustable Gain Symbol Min. Max. Unit
analog microelectronics
April
SWITCHING INTERFACE
FUNCTIONAL DIAGRAM
STABP(N)
AM337
VLOW
NULL
AUXIN TRESH3IN AUXOUT SCDIN
CSCD
SCDOUT
RREF
RREF
Short Circuit Detection
SENSEIN
Voltage Supplies
Comp
Output Stage
1.1mA 1.1mA
OUT1
1.6mA 1.6mA
Comp1 Delay Comp2
THRESH1IN THRESH2IN
OUT1I
AOUT
OUT2
GAIN
Logic
LED1
VIN- VIN+
1.1V
HYSTIN
Oscillator
CDELAY LED2
VBRIDGE
CMODE
RHYS1 RHYS2 CDEL
1.8V ROSC COSC
Figure
FUNCTIONAL DESCRIPTION
integrated circuit, AM337, analog/digital ASIC industrial applications. This developed sensor interface circuit with 3(4) wire output specially differential transducers. used strain gauges, piezoresistive pressure sensors, thermocouples, magnetoresistive sensors, others. grounded transducer sensors this also used wire mode well. Especially voltage excitated transducers AM337 delivers excitation supply. input circuit AM337 3(4) wire mode formed precision instrumentation amplifier whose gain adjustable external resistors between 160. analog output AOUT allows direct measurement amplified input signal. multifunctional comparators signal path with adjustable hysteresis thresholds allow single operations delayed direct threshold switch. this operating mode input used comparator remains open.
analog microelectronics
April
SWITCHING INTERFACE
AM337
Adding second comparator possible realize switch circuit with supplementary functions setting warning signal. state comparator indicated output OUT2. Further combination these comparators allows construction point switch (window discriminator) with independent wide range switching points. third comparator (auxiliary comparator) allows synchronisation with external events. This comparator linked with signal path logical or-function used emergency shut off. switching outputs laid current sources, current sinks high level outputs allow simultaneous NO-mode NC-mode P-type switch AM337-2 N-type switch AM337-1. choice external transistors depends type switch. AM337-1 (N-type switch) transistor must NPN-type PNP-type transistor. AM337-2 devices must chosen connected complementarily. outputs saved active short circuit protection, duty cycle adjusted external capacitor CSCD. case undervoltage they switched high impedance level. different operating modes AM337, including short circuit indicated blinking LEDs. Specially disturbance states linked directly simultaneously attached processor outputs SCDOUT VLOW. adjustable signal delay allows suppression disturbance transient input signals multitude integrated functions internal hystereses protect circuit against EMC. Without external capacitor shorter reaction times possible. AM337 used wire applications well wire mode. wire mode auxiliary comparator input stage grounded transducers AM337 supplied with minimum Volt. instrumentation amplifier comparators then switched off, output functions identical both application modes. voltage reference 3(4) wire 1.8V wire applications) suitable supply interfaced sensor elements external adjustable thresholds different comparators. According industrial standards AM337 developed large temperature range supply voltage range between 2.1V (9V) 35V. With wide programmable digital part combinations output levels form current source/current sinks high level outputs possible. complete description output constellations application note available request.
analog microelectronics
April
SWITCHING INTERFACE
PADOUT
NAME HYSTIN THRESH1IN VIN+ VIN- AOUT GAIN RREF CDELAY THRESH3IN AUXIN AUXOUT VLOW SCDOUT OUT2 CMODE LED2 LED1 STABN SCDIN SENSEIN OUT1I OUT1 THRESH2IN STABP OUT1I OUT1 DESIGNATION Hysteresis Comparator Comparator Threshold Comparator Input Instrumentation Amplifier Input Instrumentation Amplifier Analog Output Instrumentation Amplifier Gain Instrumentation Amplifier
AM337
Voltage Supply Output Volt (Reference Point Voltage Supply Output Volt Reference Resistor Signal Delay Threshold Comparator Input Comparator Hysteresis Auxiliary Comparator Voltage Detection Short Circuit Detection Output Output Comparator Comparator Operating Mode Select Internal Oscillator Adjust Ground Output Output Voltage Supply Output Volt Regulator (AM337-1, NPN-Type) Short Circuit Detection Time Short Circuit Sense Signal Output Normally Open (AM337-1, NPN-Type) Output Normally Closed (AM337-1, NPN-type) Signal Threshold Comparator Regulator (AM337-2, PNP-Type) Output Normally Closed (AM337-2, PNP-Type) Output Normally Open (AM337-2, PNP-Type)
analog microelectronics
April
SWITCHING INTERFACE
AVAILABLE PINOUTS
HYSTIN TRESH1IN VIN+ AOUT GAIN RREF CDELAY TRESH3IN AUXIN AUXOUT VLOW
AM337
TRESH2IN OUT1 OUT1I SENSEIN SCDIN STABN LED1 LED2 CMODE OUT2 SCDOUT
HYSTIN TRESH1IN VIN+ AOUT GAIN RREF CDELAY TRESH3IN AUXIN AUXOUT VLOW
TRESH2IN OUT1 OUT1I SENSEIN SCDIN STABP LED1 LED2 CMODE OUT2 SCDOUT
AM337-1 Figure AM337-1 (NPN-Version)
AM337-2 Figure AM337-2 (PNP-Version)
2.25mm
4.9mm
Figure Chip Dimensions
DELIVERY
SO28-packaging (standard) DIL28-package engineering samples dice blue foil
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

Wide Supply Voltage Range 2.1V (9V) (4)-Wire 2-Wire Applications Simul

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