Datasheet
ADS1299
SBAS499A –JULY 2012–REVISED AUGUST 2012
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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
PD1 GAIN12 GAIN11 GAIN10 SRB2 MUX12 MUX11 MUX10
This 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
Bits[6:4] GAIN[2:0]: PGA gain
These bits determine the PGA gain setting.
000 = 1
001 = 2
010 = 4
011 = 6
100 = 8
101 = 12
110 = 24 (default)
111 = n/a
Bit 3 SRB2: Source, reference bias channel
This bit determines the SRB2 connection for the corresponding channel.
0 = Open (off) (default)
1 = Closed (on)
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 BIAS_MEAS bit for BIAS measurements. See the Bias Drive (DC Bias Circuit) subsection of
the EEG-Specific Functions section for more details.
011 = MVDD for supply measurement
100 = Temperature sensor
101 = Test signal
110 = BIAS_DRP (positive electrode is the driver)
111 = BIAS_DRN (negative electrode is the driver)
BIAS_SENSP: Bias Drive Positive Sense Selection
Address = 0Dh
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
BIASP8 BIASP7 BIASP6 BIASP5 BIASP4 BIASP3 BIASP2 BIASP1
This register controls the selection of positive signals from each channel for bias drive derivation. See the Bias
Drive (DC Bias Circuit) subsection of the EEG-Specific Functions section for details.
BIAS_SENSN: Bias Drive Negative Sense Selection
Address = 0Eh
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
BIASN8 BIASN7 BIASN6 BIASN5 BIASN4 BIASN3 BIASN2 BIASN1
This register controls the selection of negative signals from each channel for bias drive derivation. See the Bias
Drive (DC Bias Circuit) subsection of the EEG-Specific Functions section for details.
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