SX8723CWLTDT SEMTECH [Semtech Corporation], SX8723CWLTDT Datasheet - Page 14

• Manufacturer Part Number: SX8723CWLTDT
• Description: ZoomingADC for sensing data acquisition
• Manufacturer: SEMTECH [Semtech Corporation]

Revision 1.01
© Semtech
6 General Description
The SX8723C is a complete low-power acquisition path with programmable gain, acquisition speed and resolution.
6.1 Bloc diagram
6.2 VREF
The internally generated V
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
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.
ADVANCED COMMUNICATIONS & SENSING
(1)
(1)
AC2
AC3
AC4
AC5
D0
D1
D0: digital IO, Vref output or I2C address select
D1: digital IO, Vref input or I2C address select
January 2011
SX8723C
REF
V
is a trimmed bandgap reference with a nominal value of 1.22V that provides a stable
REF
+
-
AC0
AC1
+
+
-
-
GPIO
Figure 3. SX8723C bloc diagram
PGA
CHARGE
Page 14
PUMP
BATT
CONTROL LOGIC
voltages of 3V and above. As V
ZoomingADC
4MHz
ZoomingADC for sensing data acquisition
OSC
ADC
I
2
C
TM
www.semtech.com/products/
BATT
drops down to 2.4V, the
SX8723C
VPUMP
READY
VBATT
SCL
SDA
VSS
DATASHEET