lnd sp16 - 3 a/b portable three terminal heart rate monitor with agc, fast capture & diagnostic quality filters pin number description 1 postive elect rode (v pe ) 2 cm electrode (v cm ) 3 negative electrode (v ne ) 4 ground (gnd) 5 supply voltage (v dd ) data sheet d general description ? three electrode interface ? low power for portable applications ? capable of arm only acquisition ? <20uv total input offset error ? 123 db cmrr termination ? automatic signal acquisition: ? automatic gain control (agc) ? time constant accele rator for quick baseline recapture ? common mode driver terminal ? ac only feedback ? diagnostic quality filters ? advanced capture algorithms ? 50/60 hz interference elimination ? optional accelerometer & algorithms diagnostic capture during movement features the lnd sp16 is a diagnostic qu ality heart rate monitor with unique features making it uniquely suited for portable heart rate aquisition in dynamic environments. the lndsp16 is capable of acquiring heart rate from the arm only , using three (3) electrode leads. the device includes a h igh gain instrumentation amplifier with extremely low offset ( <20uv ) with a termination scheme offering 123db of common mode rejection. the device includes an automatic gain control (agc) feature, time constant accelerator, and dynamic common mode drive t o enable fast capture of the baseline and heart rate waveform. the lndsp16 - 3b includes an interface to an accelerometer allowing capture of heart rate images during movement (patents pending) . the lndsp16 - 3a/b operates from 5v, but draws extremely low cu rrent , making it idea l for portable device operation. the device also utilizes high order bessel filters which have been shown to be least disruptive to diagnostic results, as well as advanced hilbert & stc transform identification algorithms capable of d ealing with hrv. applications ? portable heart rate equipment ? portable fitness & wellness products ? non - critical diagnostics pin description figure 1 C 3 - electrode heart rate waveform from the arm ? linear dimensions semiconductor inc. ? 22620 ricardo rd, cupertino ca 95014 usa ? tel 312.321.1810 ? fax 312.321.1830 ? www.lineardimensions.com ?
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