Datasheet

ADS1294, ADS1294R
ADS1296, ADS1296R
ADS1298, ADS1298R
SBAS459I –JANUARY 2010–REVISED JANUARY 2012 www.ti.com
CHnSET: Individual Channel Settings (n = 1 : 8)
Address = 05h to 0Ch
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
PD GAIN2 GAIN1 GAIN0 0 MUXn2 MUXn1 MUXn0
The CH[1:8]SET Control Register configures the power mode, PGA gain, and multiplexer settings channels. See
the Input Multiplexer section for details. CH[2:8]SET are similar to CH1SET, corresponding to the respective
channels.
Bit 7 PD: Power-down
This bit determines the channel power mode for the corresponding channel.
0 = Normal operation (default)
1 = Channel power-down.
When powering down a channel, it is recommended that the channel be set to input short by setting the appropriate
MUXn[2:0] = 001 of the CHnSET register.
Bits[6:4] GAIN[2:0]: PGA gain
These bits determine the PGA gain setting.
000 = 6 (default)
001 = 1
010 = 2
011 = 3
100 = 4
101 = 8
110 = 12
Bit 3 Always write '0'
Bits[2:0] MUXn[2:0]: Channel input
These bits determine the channel input selection.
000 = Normal electrode input (default)
001 = Input shorted (for offset or noise measurements)
010 = Used in conjunction with RLD_MEAS bit for RLD measurements. See the Right Leg Drive (RLD DC Bias Circuit)
subsection of the ECG-Specific Functions section for more details.
011 = MVDD for supply measurement
100 = Temperature sensor
101 = Test signal
110 = RLD_DRP (positive electrode is the driver)
111 = RLD_DRN (negative electrode is the driver)
RLD_SENSP
Address = 0Dh
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
RLD8P RLD7P RLD6P RLD5P RLD4P RLD3P RLD2P RLD1P
This register controls the selection of the positive signals from each channel for right leg drive derivation. See the
Right Leg Drive (RLD DC Bias Circuit) subsection of the ECG-Specific Functions section for details.
Note that registers bits[5:4] are not available for the ADS1294/4R. Bits[7:6] are not available for the
ADS1294/6/4R/6R.
RLD_SENSN
Address = 0Eh
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
RLD8N RLD7N RLD6N RLD5N RLD4N RLD3N RLD2N RLD1N
This register controls the selection of the negative signals from each channel for right leg drive derivation. See
the Right Leg Drive (RLD DC Bias Circuit) subsection of the ECG-Specific Functions section for details.
Note that registers bits[5:4] are not available for the ADS1294/4R. Bits[7:6] are not available for the
ADS1294/6/4R/6R.
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