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ADS1294CZXGR Datasheet(PDF) 43 Page - Texas Instruments

Part # ADS1294CZXGR
Description  ADS129x Low-Power, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements
PDF  114 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

ADS1294CZXGR Datasheet(HTML) 43 Page - Texas Instruments

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RLDINV
RLD
OUT
RLD
REF
RLDIN
VA1-8
Device2
VA1-8
RLDINV
RLD
OUT
RLD
REF
RLDIN
VA1-8
DeviceN
VA1-8
Power-Down
Power-Down
RLDINV
RLD
OUT
RLD
REF
RLDIN
VA1-8
Device1
VA1-8
RLD
Amp
(AVDD+AVSS)/2
RLDREF_INT
RLDREF_INT
RLD_REF
RLD_OUT
RLD_INV
RLD
ADS129x
WCT_TO_RLD
FromWCTAmplifiers
RLD_REF
WCT
ADS1294, ADS1294R, ADS1296, ADS1296R, ADS1298, ADS1298R
www.ti.com
SBAS459K – JANUARY 2010 – REVISED AUGUST 2015
9.3.1.7.6.1
WCT as RLD
In certain applications, the RLD is derived as the average of RA, LA, and LL. This level is the same as the WCT
voltage. The WCT amplifier has limited drive strength; therefore, only use the WCT to drive very high
impedances directly. The ADS129x provide an option to internally buffer the WCT signal by setting the
WCT_TO_RLD bit in the CONFIG4 register. Short the RLD_OUT and RLD_INV pins external to the device.
Before the RLD_OUT signal is connected to the RLD electrode, use an external amplifier to invert the phase of
the signal for negative feedback.
Figure 44. Using the WCT as the Right Leg Drive (RLD)
9.3.1.7.6.2
RLD Configuration with Multiple Devices
Figure 45 shows multiple devices connected to an RLD.
Figure 45. RLD Connection for Multiple Devices
Copyright © 2010–2015, Texas Instruments Incorporated
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Product Folder Links: ADS1294 ADS1294R ADS1296 ADS1296R ADS1298 ADS1298R



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