XE8000EV120 Semtech, XE8000EV120 Datasheet - Page 13

• Manufacturer Part Number: XE8000EV120
• Description: BOARD EVAL FOR SX8722I070TRLF
• Manufacturer: Semtech
• Series: ZoomingADC™r

Specifications of XE8000EV120

• Number Of Adc's: 1
• Number Of Bits: 16
• Data Interface: I²C
• Inputs Per Adc: 7 Single or 4 Differential
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: SX8722
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: XM8000EV120; XM8000EV120

ADVANCED COMMUNICATIONS & SENSING
3.5 User interface
3.5.1 Analog interface
3.5.2 Digital interface
3.5.3 Low power modes
3.5.4 RC calibration
© 2007 Semtech Corp.
The low power modes buttons allow the user to set the SX8722 in sleep or shutdown mode.
Note: Once the shutdown mode is set, only a RESET can wake up the SX8722.
The RC calibration jumper allows connecting the pin CAL of the SX8722 to ground (default). In
this case, the CAL pin indicates to the chip the presence of an external 32kHz crystal on its XIN &
XOUT pins.
When not connected, the SX8722 remains uncalibrated unless its calibration values were
previously saved in the external EEPROM.
Note: The calibration can also be performed via an external 32kHz square wave signal applied on
CAL pin (see “Frequency calibration process” section of SX8722 datasheet).
3.5.5 Gateway control
The gateway bypass jumper allows the user to bypass the onboard XE8806A. One can then set
its own solution using the digital interface pins TX, RX, SDA&SCL (see §3.5.2).
By default, the jumper is not connected.
The RESET_GW button allows the user to reset the gateway.
Engineering
Area
Digital
Connections
Engineering
Area
Analog
Connections
VDD
VSS
VDD
VSS
13
The digital interface gives access to the SX8722 digital
pins, the PC gateway connections and the power
supplies.
The connections are available on single row 2.54mm
connectors and on the bare PCB next to the engineering
area.
Using the engineering area, one can set its own
application only using the SX8722 and bypassing the
onboard gateway.
The analog interface gives access to the SX8722 analog
pins,
(see §3.5.8).
The connections points are available on industrial PCB
terminal blocks and on the bare PCB next to the
engineering area.
the
BIAS
SX8722 Evaluation Tools XE8000EV120
pin
and
the
external
www.semtech.com
PRELIMINARY
Users Guide
reference