XE8000EV120 Semtech, XE8000EV120 Datasheet - Page 38

• 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

10. Default configuration
The SX8722 default configuration is described in this chapter.
The SX8722 default hardware configuration is as follow:
Note:
10.1. ZoomingADC default settings
The SX8722 starts upon a power on reset and then goes into measurement mode.
By default the measurement mode parameters are as follows:
Differential measurement on channel AC0 - AC1, gain 1, 16 bits resolution, reference on AR1P - AR1N, no filtering,
continuous measurements.
The READY pin will pulse from "0" to "1" at every sample available. The host microcontroller can then read the data.
ACS - Revision 4.2
©2008 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
1uF Vreg capacitor connected to Vreg pin
EE_SDA connected to ground
3.0 - 5.0 power supply on Vbat, 0V on GND
Wheatstone bridge type sensor connected to AC0-AC1 biased through bias pin
VRef = VBias = VBat
Host micro controller I2C connected to SDA and SCL of the SX8722
Host micro controller GPIO connected to RESET input of the SX8722
Startup conditions Reset = ‘0’
Differential
AR1P
AR1N
AR2P
AR2N
AC7
AC6
AC5
AC4
AC3
AC2
AC1
AC0
BIAS
October 2008
Figure 22. Schematic of the default configuration
SX8722
PGA
POST-PROCESS
ZoomingADC
Page 38
ADC
TM
High gain acquisition for sensor interface
CONTROL
POWER
OSC
I
2
C
VMULT
ALRM1
ALRM2
RESET
READY
CKOUT
VREG
VBATT
SLEEP
XOUT
SHUT
GND
CAL
SCL
SDA
XIN
DATASHEET
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SX8722
VBATT
SCL
SDA
GPIO
MCU