Datasheet

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Digital Interface

The AINCOM and multiplexer bypass pins are brought to J2, as shown in Table 3. AINCOM is connected

to pin 12 on J2. An additional connection is made between J2.11 and J1.10; as a result of this connection,

if J2.11 and J2.12 are shorted, and J1.9 and J1.10 are shorted, AINCOM is grounded; if only J2.11 and

J2.12 are shorted, AINCOM is available on the EVM analog connector.

The multiplexer bypass is available at J2.13–J2.14 (MUXOUP) and J2.15–J2.16 (MUXOUN). Shorting

these pairs of pins routes the multiplexer output back to the ADCINN and ADCINP pins through a

differential filter. Alternatively, a signal can be applied directly to ADCINN and ADCINP through the filter.

Table 3. J2—Supplemental Analog Interface Pinout

PIN NUMBER SIGNAL DESCRIPTION

J2.1–J2.2 GND Analog ground

J2.3 A8 AIN8, ADS1258

J2.4 A9 AIN9, ADS1258

J2.5 A10 AIN10, ADS1258

J2.6 A11 AIN11, ADS1258

J2.7 A12 AIN12, ADS1258

J2.8 A13 AIN13, ADS1258

J2.9 A14 AIN14, ADS1258

J2.10 A15 AIN15, ADS1258

J2.11 J1.10 Connected to J1, pin 10

J2.12 ACOM AINCOM, ADS1258

J2.13 ANP ADCINP, ADS1258

J2.14 MOP MUXOUP, ADS1258

J2.15 ANN ADCINN, ADS1258

J2.16 MON MUXOUN, ADS1258

3 Digital Interface

3.1 Serial Data Interface

The ADS1258EVM is designed to easily interface with multiple control platforms. Samtec part numbers

SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket

combination at J6. This header/socket provides access to the digital control and serial data pins of the

TSC. Consult Samtec at www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating connector

options.

All logic levels on J6 are 3.3V CMOS, except for the I

C pins, which conform to 3.3V I

C rules. The

ADS1258 may run at different logic levels, as set using J4. All ADS1258 pins are therefore level-shifted.

SBAU126C– May 2007– Revised May 2011 ADS1158EVM, ADS1258EVM, ADS1158EVM-PDK, and ADS1258EVM-PDK

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