sx8725 Semtech Corporation, sx8725 Datasheet - Page 10
sx8725
Manufacturer Part Number
sx8725
Description
Sx8725 Zoomingadc? For Pressure And Temperature Sensing
Manufacturer
Semtech Corporation
Datasheet
1.SX8725.pdf
(53 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
sx8725CWLTDT
Manufacturer:
Semtech
Quantity:
3 377
Company:
Part Number:
sx8725E083TDT
Manufacturer:
Semtech
Quantity:
1 996
Company:
Part Number:
sx8725E083TDT
Manufacturer:
STM
Quantity:
2 083
ADVANCED COMMUNICATIONS & SENSING
Circuit Description
General Description
The SX8725 is a complete low-power acquisition path with programmable gain, acquisition speed and
resolution.
Block Diagram
VREF
The internally generated V
stable voltage reference for the ZoomingADC.
This reference voltage is directly connected to one of the ZoomingADC reference multiplexer inputs.
The bandgap voltage stability is only guaranteed for V
2.4V, the bandgap voltage could reduce by up to 50mV.
The bandgap has relatively weak output drive so it is recommended that if the bandgap is required as a signal
input then PGA1 must be enabled with Gain = 1.
V1.5 © 2007 Semtech Corp.
D0/REF
D1/REF
AC2
AC3
OUT
IN
SX8725
V
REF
REF
+
-
is a trimmed bandgap reference with a nominal value of 1.22V that provides a
AC1
+
+
AC0
-
-
GPIO
Figure 3 - SX8725 Block Diagram
ZoomingADC™ for Pressure and Temperature Sensing
PGA
CHARGE
PUMP
CONTROL LOGIC
10
BATT
ZoomingADC
voltages of 3V and above. As V
4MHz
OSC
ADC
I
2
C
TM
BATT
www.semtech.com
READY
V
V
SDA
VSS
SCL
PUMP
BATT
drops down to
SX8725