Datasheet

www.ti.com
Digital Interface
2.3 DAC Output Connection
The AMC7812 contains 12, 12-bit DACs that provide digital control with 12 bits of resolution with an
internal reference or an external reference.
Samtec part numbers TSM-118-01-T-DV-P and SSW-110-22-F-D-VS-K provide a convenient 18-pin
header/10-pin socket combination at J3. This header/socket provides access to the DAC outputs and
related pins of the AMC7812. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a
variety of mating connector options. Table 2 describes the DAC output connector J3 pinout.
Table 2. J3: DAC Output Connector Pinout
Pin Number Signal Description
J3-2 DAC0_OUT Output of DAC0
J3-4 DAC1_OUT Output of DAC1
J3-5 DAC2_OUT Output of DAC2
J3-8 DAC3_OUT Output of DAC3
J3-10 DAC4_OUT Output of DAC4
J3-12 DAC5_OUT Output of DAC5
J3-14 DAC6_OUT Output of DAC6
J3-16 DAC7_OUT Output of DAC7
J3-18 DAC8_OUT Output of DAC8
J3-20 DAC9_OUT Output of DAC9
J3-22 DAC10_OUT Output of DAC10
J3-24 DAC11_OUT Output of DAC11
J3-30 REF_OUT Internal reference output
J3-33 AGND Analog ground
J3-35 AGND Analog ground
J3-36 REF_DAC External reference for DAC
3 Digital Interface
The AMC7812EVM 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 J2, described in Table 3. This header/socket provides access to the digital control and
serial data pins of the AMC7812. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a
variety of mating connector options.
Table 3. J2: Digital Interface Pinout
Pin Number Signal Description
J2-2, J2-17 (the external digital
External conversion trigger, input
signal can be fed to AMC either
CNVT to AMC. The falling edge starts
through J2-2 or J2-17, selectable
the ADC under the direct mode.
through JP12)
J2-4, J2-10, J2-18 DGND Digital ground
AMC global alarm, open-drain
J2-6 ALARM
output from AMC; active low
J2-7 FSX Chip select
Clear DACs associated with
J2-8 CLR0 CLR0 (refer to AMC7812 Register
Map 0x56)
J2-11 DX SPI data out
Clear DACs associated with
J2-12 CLR1 CLR1(refer to AMC7812 Register
Map 0x57)
J2-13 DR SPI data in
5
SBAU177ASeptember 2010Revised May 2013 AMC7812EVM-PDK User’s Guide
Submit Documentation Feedback
Copyright © 2010–2013, Texas Instruments Incorporated