Datasheet

MAX11666 Evaluation Kit
Evaluates: MAX11666
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Detailed Description of Hardware
The MAX11666 EV kit is a fully assembled and tested
PCB that evaluates the MAX11666 2-channel, 12-bit,
SPI-compatible 500ksps ADC. The EV kit comes installed
with a MAX11666AUB+ in a 10-pin FMAX package with
an exposed pad.
Power Supply
A 5V power supply is required to power up the EV kit.
Connect the positive terminal of the power supply to the
VIN connector and the negative terminal to the GND
connector.
On-Board Input Buffer
On-board input buffers (U9 and U16) are provided on
the EV kit. To power the on-board buffer, connect the
+5V, GND, and -5V terminals of the power supply to the
OP+, GND, and OP- connectors, respectively.
Analog Input 1
Move the shunt on jumper JU18 to the 2-3 position and
remove the shunts on jumpers JU19 and JU20. The
user can connect the AC signal to the AIN1_AC_SMA
or AIN1_AC connector and connect the DC offset to the
AIN1_DC_SMA or AIN1_DC connector. If the measur-
ing signal has already been shifted above the ground
level, short the AC input to ground by installing a shunt
on JU19 and connecting the measuring signal to the
AIN1_DC_SMA or AIN1_DC connector. To bypass the
buffer and connect the measuring signal directly to the
AIN1 input of the ADC, move the shunt on JU18 to the
1-2 position. Then connect the measuring signal to the
AIN1_DC_SMA or AIN1_DC connector.
Analog Input 2
Move the shunt on jumper JU21 to the 2-3 position and
remove the shunts on jumpers JU22 and JU23. The
user can connect the AC signal to the AIN2_AC_SMA or
AIN2_AC connector and connect the DC offset to the
AIN2_DC_SMA or AIN2_DC connector. If the measuring
signal has already been shifted above the ground level,
short the AC input to ground by installing a shunt on
JU23 and connect the measuring signal to the AIN2_
DC_SMA or AIN2_DC connector. To bypass the buffer
and connect the measuring signal directly to the AIN2
input of the ADC, move the shunt on JU21 to the 1-2
position. Finally, connect the measuring signal to the
AIN2_DC_SMA or AIN2_DC connector.
User-Supplied SPI Interface
For a user-supplied SPI interface, first move the shunts
on jumpers JU12–JU15 to the 2-3 position and connect
the user-supplied CS, SCLK, CHSEL, and MISO signals
to the corresponding CS, SCLK, CHSEL, and DOUT
connectors on the EV kit.
Table 1. Jumper Settings (JU1–JU8, JU10–JU23)
JUMPER
SHUNT
POSITION
DESCRIPTION
JU1
1-2 Connects the USB power to the input of the on-board LDO (U10).
2-3* Connects the external power supply to the input of the on-board LDO (U10).
JU2
1-2 Connects the USB power to the input of the on-board LDO (U11).
2-3* Connects the external power supply to the input of the on-board LDO (U11).
JU3
1-2 Connects the USB power to the input of the on-board LDO (U12).
2-3* Connects the external power supply to the input of the on-board LDO (U12).
JU4
1-2 Connects the USB power to the input of the on-board LDO (U13).
2-3* Connects the external power supply to the input of the on-board LDO (U13).
JU5
1-2* The on-board LDO (U10) provides 3.3V output to the EV kit.
Open Disconnects the output of the on-board LDO (U10).
JU6
1-2* The on-board LDO (U11) provides 1.8V output to the EV kit.
Open Disconnects the output of the on-board LDO (U11).
JU7
1-2* The on-board LDO (U12) provides 2.5V output to the EV kit.
Open Disconnects the output of the on-board LDO (U12).
JU8
1-2* The on-board LDO (U13) provides 1.2V output to the EV kit.
Open Disconnects the output of the on-board LDO (U13).