artisan PB1651ADC1 User manual
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Instra
PB1651ADC1 A/D Module
User’s Guide
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2
Copyright
The data in this document may not be altered or amended without special
notification from ETAS GmbH. ETAS GmbH undertakes no further obligation
in relation to this document. The software described in it can only be used if
the customer is in possession of a general license agreement or single license.
Using and copying is only allowed in concurrence with the specifications
stipulated in the contract.
Under no circumstances may any part of this document be copied, repro-
duced, transmitted, stored in a retrieval system or translated into another
language without the express written permission of ETAS GmbH.
© Copyright 2004 - 2010 ETAS GmbH, Stuttgart
The names and designations used in this document are trademarks or brands
belonging to the respective owners.
R1.0.3 EN - 07.2010 TTN F 00K 103 875
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Contents 3
Contents
1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Applications and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.1 Input Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.2 Analog Input Channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.3 Anti-Aliasing Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.4 External Synchronization Inputs . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.5 Creating a Mean Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3Pin Assignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5ETAS Contact Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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Contents4
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Introduction 5
1 Introduction
This User's Guide contains the description of the PB1651ADC1 A/D Module.
It consists of the following chapters:
• Introduction
– Applications and Features (section 1.1 on page 5)
– Block Diagram (section 1.2 on page 7)
• Hardware Features (chapter 2 on page 8)
– Configuration (section 2.2 on page 10)
– LEDs (section 2.3 on page 10)
• Pin Assignment (chapter 3 on page 12)
• Technical Data (chapter 4 on page 14)
1.1 Applications and Features
The PB1651ADC1 A/D Module is used to acquire analog signals with average
resolution and data rates (e.g. engine temperature, oil temperature). It can be
used both with the ES1651 Carrier Board (VMEbus) and with the ES4350 Car-
rier Board (VXIbus).
The PB1651ADC1 A/D Module has the following features:
• 16 differential input channels
• One A/D converter per channel with 16-bit resolution
• Accuracy ±3 mV typical, ±5 mV warranted
• Conversion rate/sampling rate 25 kSamples/s
• Input overvoltage protection ±60 V
• Input impedance > 10 MΩ
• 4th order low-pass filter 5 kHz (3 dB cutoff frequency)
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Introduction6
The following figure shows the front panel of the PB1651ADC1 A/D Module.
Fig. 1-1 Front Panel of the PB1651ADC1 A/D Module
RDER CH
INPUT 0-15
ETAS
PB1651
ADC1.1
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Introduction 7
1.2 Block Diagram
The following figure shows the block diagram of the PB1651ADC1 A/D Mod-
ule.
Fig. 1-2 Block Diagram of the PB1651ADC1 A/D Module
Measurement Controller
CH 15
Overvoltage
Protection
Differential
Amplifier
Anti-
Aliasing
4th Order
Lowpass
Filter
A/D
Converter
CH 0
Overvoltage
Protection
Differential
Amplifier
Anti-
Aliasing
4th Order
Lowpass
Filter
A/D
Converter
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Hardware Features8
2 Hardware Features
This section contains a description of the inputs of the PB1651ADC1 A/D Mod-
ule.
2.1 Inputs
2.1.1 Input Voltage Range
The input voltage range of the channels is 0 - 10 V. The analog inputs are pro-
tected against overvoltage to +60 V.
2.1.2 Analog Input Channels
The PB1651ADC1 A/D Module has 16 identical input channels – the structure
of an input stage is shown in Fig. 2-1. The relevant input signal is measured as
a differential signal at a differential amplifier.
Fig. 2-1 Input Channels
Using a differential amplifier makes it possible to realize systems with a partic-
ularly high common-mode rejection ratio (CMRR) – with the PB1651ADC1 A/D
Module this is 95 dB.
+In
-In
-12 V
+12 V
-12 V
+12 V
+
-
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Hardware Features 9
+IN and -IN of all input channels are capacitively coupled to the system hous-
ing.
2.1.3 Anti-Aliasing Filter
Every channel is equipped with an anti-aliasing 4th order low-pass filter the
3 dB cutoff frequency of which is 5 kHz.
Note
If the signal to be measured is not a differential signal but a single-ended
signal, the relevant –IN input at the input connector has to be connected to
AGND.
Note
When sampling at a sampling rate of fA, only those signals can be acquired
without fault which are band-limited and which contain frequency portions
to a maximum of half the sampling rate fA/2 (sampling theorem). To ensure
that the sampling theorem is adhered to, the sampling rate must be at least
10 kHz.
-3 dB
-65 dB
5 kHz 50 kHz
0 dB
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