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CAV414 AM402
Analog Microelectronics GmbH (AMG) developed breadboard that allows tests CAV414 conjunction with AM402 (current transmitter different configurations, e.g. with different capacitive sensors. breadboard offers independent adjustment output voltage 5/10V) output current (0/4 20mA). cover great variety applications, breadboard contains components needed. principle, 2-wire applications possible with combination CAV414/AM402. Please details. Breadboard Description: capacitive input signal circuitry external capacitive sensor discrete capacitors. Since capacitive inputs available, also possible connect differential capacitive sensor. Without adding extra components, principle function system proofed which achieved built-in capacitors CX1, CX2A CX2B input. closing jumpers capacitive change achieved that increased 100% closing additional jumper When testing other configurations, three jumpers have open. desired output voltage 5/10V) adjusted R2C. output used, jumper closed. Using output, jumper open. output current (0/4 20mA) adjusted 20mA output used, jumpers closed jumper open. Using 20mA output, jumpers open jumper closed. supply additional circuits, reference voltages VREF2 (with IREF2,max 9mA) VREF1 (with IREF1,max 10mA) CAV414 AM402 used. Under circumstances, reference voltages must connected together. Breadboard Adjustment: Each resistors RCX1 RCX2 offers adjustment input capacitances ±25% that overall adjustment ±50% made. output gain (typ.: varied ±20% resistor R2C. output current ISET zero input signal varied within range 5.26mA. Before putting circuit into operation, adjustment entire system made. first step when using breadboard calculate oscillator capacitance COSC: COSC lowpass capacitances which have same value zero-adjustment made resistors RCX1 RCX2 case that varying capacitance nearly same (and smallest) value fixed capacitance
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
2000 Rev.
CAV414 AM402
(reference capacitance), e.g. case displacement sensor without target front adjustment, resistors varied until differential voltage VDIFF ,min VLPOUT ,min zero: VDIFF ,min span-adjustment made resistors case that varying capacitance greatest value, e.g. case displacement sensor with target directly front resistors (depending maximum capacitive change CX2) varied until differential voltage VDIFF ,max 400mV output voltage VOUT adjusted maximum value jumper open) resistor R2C. With resistor maximum output current adjusted 20mA
Breadboard Component Side:
Figure
analog microelectronics
2000
Breadboard Component List:
Part Symbol CAV414 AM402 ROSC RCX1A RCX2A RCX1B RCX2B CREF1 CREF2 COSCA COSCB CX2A CX2B Value 200k 300k 300k 200k 200k 100k 100k 100k 180k 2.2µF 2.2µF BD139 1N4002 220nF 220nF 1.5nF 100pF
CAV414 AM402
Notes
standard from Analog Microelectronics GmbH standard from Analog Microelectronics GmbH metal film, ±50ppm/°C metal film, ±50ppm/°C metal film, ±50ppm/°C trimmer, ±100ppm/°C, turns trimmer, ±100ppm/°C, turns trimmer, ±100ppm/°C, turns trimmer, ±100ppm/°C, turns metal film, ±50ppm/°C metal film, ±50ppm/°C metal film, ±50ppm/°C trimmer, ±100ppm/°C, turns metal film, ±50ppm/°C trimmer, ±100ppm/°C, turns metal film, ±50ppm/°C metal film, ±50ppm/°C metal film, ±50ppm/°C metal film, ±50ppm/°C ceramic, ceramic, transistor, NPN, diode, URRM =100V ceramic, ceramic, ceramic, COG, 30ppm/°C ceramic, COG, 30ppm/°C ceramic, COG, 30ppm/°C ceramic, COG, 30ppm/°C ceramic, COG, 30ppm/°C jumper
analog microelectronics
2000
VREF1
ROSC ROSC RCX1B RCX1 RCX2B RCX2 100k (0.100k) LPOUT COSC 220nF 180k 300k 100k 300k (0.200k) RCX2A 220nF 200k RCX1A
Figure
CREF1
VREF
N.C.
Breadboard Circuit:
N.C.
VSET
100k (0.200k) 100k (0.100k)
BD139 7,5k (0.10k) VREF COSC 1.6nF 100nF
GAIN+
COSC
N.C.
GAIN
1N4002
VREF
GAIN-
GAIN
LPOUT
VOUT
100k
AM402
analog microelectronics
CAV414
(0.10k)
IOUT
(AM402)
(CAV414)
CAV414 AM402
2000

Analog Microelectronics GmbH (AMG) developed breadboard that allows te

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