XE8000EV101 Semtech, XE8000EV101 Datasheet - Page 87

• Manufacturer Part Number: XE8000EV101
• Description: EVAL BOARD FOR XE8801AMI027LF
• Manufacturer: Semtech
• Type: MCUr

Specifications of XE8000EV101

• Contents: Fully Assembled Evaluation Board
• For Use With/related Products: XE88LC01AMI027
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

16.1 ZoomingADC™ Features
The ZoomingADC™ is a complete and versatile low-power analog front-end interface typically intended for sensing
applications. The key features of the ZoomingADC™ are:
Programmable 6 to 16-bit dynamic range oversampled ADC
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16.2 Overview
The total acquisition chain consists of an input multiplexer, 3 programmable gain amplifier stages and an
oversampled A/D converter. The reference voltage can be selected on two different channels. Two offset
compensation amplifiers allow for a wide offset compensation range. The programmable gain and offset allow one to
zoom in on a small portion of the reference voltage defined input range.
© Semtech 2005
Flexible gain programming between 0.5 and 1000
Flexible and large range offset compensation
4-channel differential or 8-channel single-ended input multiplexer
2-channel differential reference inputs
Power saving modes
Direct interfacing to CoolRisc™ microcontroller
Reference
Analog
Inputs
Inputs
0
1
2
3
4
5
6
7
0
1
2
3
Reference
Figure 16-1. ZoomingADC™ general functional block diagram
Selection
Selection
Input
V
IN
f
V
S
Gain1 Gain2
REF
PGA1
GD1
V
D1
Offset2
OFF2
PGA2
GD2
16-2
ZOOM
Gain3
V
D2
Offset3
OFF3
PGA3
GD3
XE8801A – SX8801R
V
IN,ADC
ADC
f
S
16
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