am422 AME, Inc., am422 Datasheet
am422
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am422 Summary of contents
Page 1
... Analog Microelectronics GmbH An der Fahrt 13, D – 55124 Mainz Internet: www.analogmicro.de GENERAL DESCRIPTION The AM422 is a low cost monolithic voltage– to–current converter specially designed for analog signal transmission. The AM422 is available in a 3– or 2–wire version, which al- lows applications with flexible input voltage ranges to be used for a standard output current ...
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... V = 6V...35V REF CC ≈ 5mA / 6V...35V, I REF CC REF /dI REF ≈ 5mA /dI I REF REF I = 4mA 25Ω SET 0 /dT OS /dT /dT OS /dT AM422 Min. Typ. Max. Unit 1.5 mA –40 85 °C –55 125 °C 150 °C 110 °C/W 180 °C/W 4.75 5.00 5.25 V 9.5 10.0 10 ...
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... R 5 OUTFS c = 20mA OUTFS R limitation only for 3–wire operation only for 2–wire operation β F AM422 Min. Typ. Max. Unit 1.00 0.75 1.00 1.25 400 500 580 mV mV ±2 ±6 µV/°C ±7 ±20 –35 –50 µ nA/°C ...
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... IC and the diode is protecting the transistor against reverse polarity. Typical values for the external components are listed in the Application Notes. In principle the AM422 can be used as a two–wire three–wire voltage–to–current interface. The schematic of the entire system for the three–wire output is demonstrated on Figure 2. The ex- ...
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... OUT Basically the IC AM422 is composed of 3 functional sections as they shown in Figure operational amplifier input which allows the adjustment of the output current range with the two external resistors R and R 1 the output current range can be set voltage controlled current output, with a wide current range is adjustable with external resis- ...
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... OUTmin the value of the supply voltage CCmin CCmin OUTmax Operating Area AM422 (10) 2 has to be considered with care. S (11 CCmin R = 500: Lmax I = 20mA OUTmax 35 V [V] S April 99 (8) (9) 6/10 ...
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... SET Figure 5 DELIVERY The AM422 is available in 2– (AM422–2) or 3–wire version (AM422–1). The different versions are pin compatible. The AM422 is available as: • 8 pin DIL packages (samples) • packages • Dice on 5“ blue foil PACKAGE DIMENSIONS SOP8 4,98 ± ...
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... SET SET REF Amplifier Figure 7 Used in a three–wire circuit (AM422–1) ground pin 7 (GND) is connected to Ground (Figure 7). The relationship using equation 2, becomes INmax ( OUTmax The current I is used to set the output current offset and can be calculated by using equation 3 ...
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... from SET = − 2mA = 2mA I I INmin OUTmin = R the set resistor SET SET ≈ 1.32kΩ R SET ≈ 18kΩ AM422 OUT Ground = 0.5...4. should using ...
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... V SET REF Amplifier Figure 9 Used in a two–wire circuit (AM422–2) ground pin 7 (GND, ⊥) is connected between R load resistor (Figure 9). The relationship INmax ( OUTmax The current I is used to set the output current offset and can be calculated by using equation 3 ...