Datasheet

ADS1294, ADS1294R

ADS1296, ADS1296R

ADS1298, ADS1298R

SBAS459I –JANUARY 2010–REVISED JANUARY 2012

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RESPIRATION

The ADS1294R/6R/8R provide three modes for respiration impedance measurement: external respiration,

internal respiration using on-chip modulation signals, and internal respiration using user-generated modulation

signals, as shown in Table 14.

Table 14. Respiration Control

RESP.RESP_CTRL[1] RESP.RESP_CTRL[0] MODE AVAILABLE DESCRIPTION

ADS1294, ADS1296, ADS1298, Respiration disabled

0 0

ADS1294R, ADS1296R, ADS1298R

Generates modulation and demodulation signals for external

ADS1294, ADS1296, ADS1298,

0 1 respiration circuitry. RESP CLK signals on GPIO2, GPIO3, and

ADS1294R, ADS1296R, ADS1298R

GPIO4.

Respiration measurement using internally-generated

1 0 ADS1294R, ADS1296R, ADS1298R

RESP_MOD signals.

ADS1294R, ADS1296R, Respiration measurement using user-generated modulation and

1 1

ADS1298R

(1)

blocking signal.

For more information on respiration impedance measurement, refer to application note Respiration Rate

Measurement Using Impedance Pneumography (SBAA181).

(1) RESP_CTRL[1:0] = 11 is not recommend if CLKSEL = 1 (internal master clock).

Product Folder Link(s): ADS1294 ADS1294R ADS1296 ADS1296R ADS1298 ADS1298R