Datasheet

DRDY
CLK CLKSEL
START
MUX
Oscillator
Power-Supply Signal
SPI
DVDD
DGND
RLD
INV
RLD
OUT
RLD
REF
Lead-Off Excitation Source
PACE
OUT2
GPIO1
GPIO4/RCLKO
GPIO3/RCLKO
RESP
CLK
PACE
OUT1
CS
SCLK
DIN
DOUT
RLD
IN
ADS1298/8R
ADS1296/6R/8/8R
GPIO2
AVDD
AVSS
IN8P
IN8N
IN7P
IN7N
IN6P
IN6N
IN5P
IN5N
IN4P
IN4N
IN3P
IN3N
IN2P
IN2N
IN1P
IN1N
PGA1
DS
ADC1
PGA2 PGA3 PGA4 PGA5 PGA6 PGA7 PGA8
EMI
Filter
EMI
Filter
EMI
Filter
EMI
Filter
EMI
Filter
EMI
Filter
EMI
Filter
EMI
Filter
Temperature Sensor Input
RLD
Amplifier
PACE
Amplifier 2
PACE
Amplifier 1
WCT
B C A
From
Wmuxc
From
Wmuxa
From
Wmuxb
WCT
Reference
VREFP
VREFN
Control
PWDN RESET
DS
ADC2
DS
ADC3
DS
ADC4
DS
ADC5
DS
ADC6
DS
ADC7
DS
ADC8
AVDD1
AVSS1
Test Signal
Internal Respiration
Modulator
( )ADS129xR
RESP
DEMOD
RESP_DEMOD_EN
ADS129xR
ADS129xR
RESP_MODP
RESP_MODN
G = 0.4
G = 0.4
ADS1294, ADS1294R
ADS1296, ADS1296R
ADS1298, ADS1298R
www.ti.com SBAS459I –JANUARY 2010–REVISED JANUARY 2012
Figure 23. Functional Block Diagram
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