Analog Devices MAX30001 - Page 22

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MAX30001 Evaluation System Evaluates: MAX30001
MAX30002
BioZ Measurement
Additionally, the EV kit includes a 100Ω resistor to verify
the BioZ conguration. Attach shunts on RP and RN to
connect the resistor to the BioZ inputs and shunts on
DP_BP and DN_BN to route the drive signal to the BioZ
channel. Figure 19 illustrates these connections.
Refer to the MAX30001 data sheet for details on conguring
a BioZ measurement. Note that the default setting of the
current generator is FMSTR/64 (about 500Hz) and the
BioZ channel has an internal high-pass lter with a default
1kHz cuto󰀨 frequency. In order to correctly measure the
100Ω resistor, bypass or lower the lter cuto󰀨 frequency
or increase the current generator frequency.
Pace Detection
To enable pace detection, the ECGN and ECGP lines must
be connected to BIN and BIP by shunting EN_BN and
EP_BP, then conguring the device registers as described
in the IC datasheet. Refer to Figure 20 for a jumper
conguration to measure ECG with pace detection.
Alternatively, EP_BP and EN_BN can be left open and
J_BIP and J_BIN shunted. This measures pace directly
on the BIP and BIN inputs and allows another signal to be
measured on the ECG channel. In this conguration, the
measured pace signal may not correspond to the ECG
measurement.
Figure 18. Default Measurement Channel Jumper Configurations
EP_EN
0Ω
BP_BN
0Ω
EN_UNBAL
EP_UNBAL
RP
RN
EP_BP EN_BN
J_ECGP
J_DRVP
J_ECGN
J_BIP
J_BIN
J_DRVN
47nF
47nF
DRVN
DRVP
BIN
BIP
ECGN
ECGP
DRVN
DRVP
BIN
BIP
ECGN
ECGP
100Ω
DP_BP DN_BN
0Ω
0Ω