XE8801AMI000WP Semtech, XE8801AMI000WP Datasheet - Page 87

• Manufacturer Part Number: XE8801AMI000WP
• Description: SENSING MACHINE WITH 16 + 10 BIT
• Manufacturer: Semtech

Specifications of XE8801AMI000WP

• Applications: Sensing Machine
• Core Processor: RISC
• Program Memory Type: FLASH (22 kB)
• Controller Series: XE8000
• Ram Size: 512 x 8
• Interface: UART, USRT
• Number Of I /o: 24
• Voltage - Supply: 2.4 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: Die
• For Use With: XE8000MP - PROG BOARD AND PROSTART2 CARD
• Other names: Q2722595

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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