Datasheet

ADS1294, ADS1294R

ADS1296, ADS1296R

ADS1298, ADS1298R

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SBAS459I –JANUARY 2010–REVISED JANUARY 2012

CONFIG2: Configuration Register 2

Address = 02h

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

0 0 WCT_CHOP INT_TEST 0 TEST_AMP TEST_FREQ1 TEST_FREQ0

Configuration Register 2 configures the test signal generation. See the Input Multiplexer section for more details.

Bits[7:6] Must always be set to '0'

Bit 5 WCT_CHOP: WCT chopping scheme

This bit determines whether the chopping frequency of WCT amplifiers is variable or fixed.

0 = Chopping frequency varies, see Table 13

1 = Chopping frequency constant at f

MOD

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Bit 4 INT_TEST: TEST source

This bit determines the source for the Test signal.

0 = Test signals are driven externally (default)

1 = Test signals are generated internally

Bit 3 Must always be set to '0'

Bit 2 TEST_AMP: Test signal amplitude

These bits determine the calibration signal amplitude.

0 = 1 × –(VREFP – VREFN)/2.4mV (default)

1 = 2 × –(VREFP – VREFN)/2.4mV

Bits[1:0] TEST_FREQ[1:0]: Test signal frequency

These bits determine the calibration signal frequency.

00 = Pulsed at f

CLK

(default)

01 = Pulsed at f

CLK

10 = Not used

11 = At dc

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