oh1 881 hall effect latching ic page 1 nanjing nanjing nanjing nanjing ouzhuo ouzhuo ouzhuo ouzhuo technology technology technology technology co., co., co., co., ltd ltd ltd ltd www.ohhall.com www.zbling.com tel 86- 25-52312738 86-25- 83247886 fax: 86-25-52312738 e-mail: ohhall@163.com order order order order information information information information p n oh 1881 operate temperature - 4 0 12 5 package 1000 pcs / bag general general general general description description description description : : : : oh 1881 hall effect latching switch ic are composed of a reve r se protector, voltage regulator, hall voltage generator, differential amplifier, schmitt trigger and an open-collector output on a single silicon chip. ics can convert the changeable magnetic field signal into digital voltage output. features features features features ? high reliability ? anti-environmental stress ? reverse polarity protection ? interfacing with all kinds of logic circuits absolute absolute absolute absolute maximum maximum maximum maximum ratings ratings ratings ratings t a =25 supply voltage v cc 4. 5-24v operating temperature range t a - 4 0 12 5 output current i o 25ma storage temperature range t s - 5 5 150 electrical electrical electrical electrical characteristics characteristics characteristics characteristics (ta= 25 c ) parameter symbol conditions value unit min typ max supply voltage v cc 4.5 - 24 v output saturation voltage v ol v cc =4.5v, r l =960 , b b op - 200 400 mv output leakage current i oh vo=vccmax , b b rp - 1 10 a supply current i cc v cc =v ccmax oc output - 6 - ma output rise time t r vcc=12v, r l =820 , c l =20pf - 0.3 1.5 s output falling time t f - 0.3 1.5 s applications applications applications applications ? non-contact switch ? speed measurement ? position detection ? brushless dc motor magnetic-electrical magnetic-electrical magnetic-electrical magnetic-electrical transfer transfer transfer transfer characteristics characteristics characteristics characteristics v out b h b b rp b op v oh 0 functional functional functional functional block block block block diagram diagram diagram diagram reg reg reg reg m amp pin1.v cc pin3.vout pin2.gnd
oh1 881 hall effect latching ic page 2 nanjing nanjing nanjing nanjing ouzhuo ouzhuo ouzhuo ouzhuo technology technology technology technology co., co., co., co., ltd ltd ltd ltd www.ohhall.com www.zbling.com tel 86- 25-52312738 86-25- 83247886 fax: 86-25-52312738 e-mail: ohhall@163.com magnetic magnetic magnetic magnetic characteristics characteristics characteristics characteristics (ta= 25 c ) (1mt = 10 gauss) parameter symbol value unit min typ max operate point b op 1 - 6 mt r elease point b rp - 6 - - 1 mt hysteresis b h - 7 - mt test test test test circuit circuit circuit circuit for for for for reference reference reference reference dimension dimension dimension dimension unit:mm) unit:mm) unit:mm) unit:mm) pin pin pin pin descriptions descriptions descriptions descriptions 1. v cc 2. gnd 3. vout caution: 1)when installing, please minimize mechanical stress on the ic shell and leads. 2)welding temperature should be lower than 260 , less than 3 seconds. 3)ic is oc output, so a pull-up resistor connected pin 1 (power) and pin 3 (output) is necessary . vout vcc r l r l =820 c l =20 pf c l 1 2 3
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