SX8724 SEMTECH [Semtech Corporation], SX8724 Datasheet - Page 10

• Manufacturer Part Number: SX8724
• Manufacturer: SEMTECH [Semtech Corporation]

SX8724
ZoomingADC™ for Pressure and Temperature Sensing
ADVANCED COMMUNICATIONS & SENSING
Circuit Description
General Description
The SX8724 is a complete low-power acquisition path with programmable gain, acquisition speed and
resolution.
Block Diagram
SX8724
Figure 3 - SX8724 Block Diagram
VREF
The internally generated V
is a trimmed bandgap reference with a nominal value of 1.22V that provides a
REF
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
voltages of 3V and above. As V
drops down to
BATT
BATT
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.
V1.23 © 2009 Semtech Corp.
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