MAXSPCSPARTAN6+ Evaluation Kit

2_ _ _______________________________________________________________________________________

Quick Start

The MAXSPCSPARTAN6+ board can be plugged in to

any Spartan 6 series FPGA evaluation board. A two-step

configuration is needed to use this card with the FPGA

evaluation board:

1)

Place a shunt on pins 2-3 of header J7

(i.e., +3V3FMC to +3V3).

2)

Place a shunt on pins 2-3 of header J6

(i.e., +5VREG to +5V).

Now connect the MAXSPCSPARTAN6+ board to the

FPGA EV kit. On power-up, LEDs D3, D4, and D5 should

glow, indicating a power-up state.

Detailed Description of Hardware

The MAXSPCSPARTAN6+ board is loaded with Maxim’s

ADCs and DACs and makes it very easy to integrate the

FPGA with any analog interface.

Communication with the MAX11612

ADC. The FPGA can drive commands for data

0110100. The MAX11612 can work with the internal

reference of 4.096V or the external reference connected

at the AD3 port of J2. If internal reference is used; all

4 channels can be sampled from AD0–AD3. For more

information, refer to the MAX11612 IC data sheet.

Communication with the MAX11040

The MAX11040 is a 24-bit, 4-channel, SPI-compatible,

sigma-delta ADC with programmable output data rate.

It has an internal reference of 2.5V with Q2.2V input

range. Input ports are marked as AD0-/AD0+ to AD3-/

AD3+ on J3. External reference can also be applied. The

MAX11040 does simultaneous sampling and data for all

4 channels and can be acquired in one read.

This ADC has four standard connections for SPI

communication. It also has an extra signal (DRDYOUT)

that interrupts the FPGA at every end-of-conversion

to sample the data. For more information, refer to the

MAX11040 IC data sheet.

Communication with the MAX5135

The MAX5135 is a 12-bit, 4-channel, voltage output,

SPI-compatible DAC. The MAXSPCSPARTAN6+ board

contains two MAX5135 ICs in a cascaded configura-

tion. The DAC channels are marked as DA0–DA3 on J2

and DA4–DA7 on J3. For more information, refer to the

MAX5135 IC data sheet.

Table_1._MAXSPCSPARTAN6+_Connector_

J2_Description

J2_PIN_NO.

LABEL

FUNCTION

1

+5V

+5V, 250mA supply for external

circuit

2

N.C.

Not connected

3

GND

Ground

4

DA0

DAC output from channel 0 of U6

(MAX5135)

5

GND

Ground

6

DA1

DAC output from channel 1 of U6

(MAX5135)

7

GND

Ground

8

DA2

DAC output from channel 2 of U6

(MAX5135)

9

GND

Ground

10

DA3

DAC output from channel 3 of U6

(MAX5135)

11

AD1

ADC input to channel 1 of U2

(MAX11612)

12

AD0

ADC input to channel 0 of U2

(MAX11612)

13

GND

Ground

14

I/O

Digital input/output connected to

FMC connector at C18

15

AD3

ADC input to channel 3 of U2

(MAX11612)

16

AD2

ADC input to channel 2 of U2

(MAX11612)