ADS1294 datasheet(48/88 Pages) TI

48 / 88 page

ADS1294, ADS1294R

ADS1296, ADS1296R

ADS1298, ADS1298R

SBAS459H

– JANUARY 2010 – REVISED OCTOBER 2011

www.ti.com

CONFIG2: Configuration Register 2

Address = 02h

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

WCT_CHOP

INT_TEST

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 fMOD/16

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 fCLK/2

21 (default)

01 = Pulsed at fCLK/2

10 = Not used

11 = At dc

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

ADS1294 Datasheet(PDF) 48 Page - Texas Instruments

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