Cinterion BGS2-E Installation guide


BGS2-E/BGS2-W
Version: 01.300
DocId: BGS2_HIO_v01.300
Hardware Interface Overview

GENERAL NOTE
THE USE OF THE PRODUCT INCLUDING THE SOFTWARE AND DOCUMENTATION (THE "PROD-
UCT") IS SUBJECT TO THE RELEASE NOTE PROVIDED TOGETHER WITH PRODUCT. IN ANY
EVENT THE PROVISIONS OF THE RELEASE NOTE SHALL PREVAIL. THIS DOCUMENT CONTAINS
INFORMATION ON CINTERION PRODUCTS. THE SPECIFICATIONS IN THIS DOCUMENT ARE SUB-
JECT TO CHANGE AT CINTERION'S DISCRETION. CINTERION WIRELESS MODULES GMBH
GRANTS A NON-EXCLUSIVE RIGHT TO USE THE PRODUCT. THE RECIPIENT SHALL NOT TRANS-
FER, COPY, MODIFY, TRANSLATE, REVERSE ENGINEER, CREATE DERIVATIVE WORKS; DISAS-
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SPECIFICALLY AUTHORIZED. THE PRODUCT AND THIS DOCUMENT ARE PROVIDED ON AN "AS
IS" BASIS ONLY AND MAY CONTAIN DEFICIENCIES OR INADEQUACIES. TO THE MAXIMUM
EXTENT PERMITTED BY APPLICABLE LAW, CINTERION WIRELESS MODULES GMBH DISCLAIMS
ALL WARRANTIES AND LIABILITIES. THE RECIPIENT UNDERTAKES FOR AN UNLIMITED PERIOD
OF TIME TO OBSERVE SECRECY REGARDING ANY INFORMATION AND DATA PROVIDED TO HIM
IN THE CONTEXT OF THE DELIVERY OF THE PRODUCT. THIS GENERAL NOTE SHALL BE GOV-
ERNED AND CONSTRUED ACCORDING TO GERMAN LAW.
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tents and communication thereof to others without express authorization are prohibited. Offenders will be
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design patent are reserved.
Copyright © 2011, Cinterion Wireless Modules GmbH
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BGS2-E/BGS2-W Hardware Interface Overview
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Document Name: BGS2-E/BGS2-W Hardware Interface Overview
Version: 01.300
Date: 2011-03-08
DocId: BGS2_HIO_v01.300
Status Confidential / Released

BGS2-E/BGS2-W Hardware Interface Overview
Contents
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Contents
1 Introduction.................................................................................................................6
1.1 Related Documents ........................................................................................... 6
1.2 Terms and Abbreviations ................................................................................... 6
1.3 Regulatory and Type Approval Information ..................................................... 10
1.3.1 Directives and Standards.................................................................... 10
1.3.2 SAR requirements specific to portable mobiles .................................. 13
1.3.3 Safety Precautions.............................................................................. 14
2 Product Concept.......................................................................................................15
2.1 Key Features at a Glance ................................................................................ 15
3 Application Interface.................................................................................................17
3.1 Operating Modes ............................................................................................. 18
4 Antenna Interface......................................................................................................19
5 Electrical, Reliability and Radio Characteristics....................................................20
5.1 Absolute Maximum Ratings ............................................................................. 20
5.2 Operating Temperatures.................................................................................. 21
5.3 Storage Conditions .......................................................................................... 22
5.4 Reliability Characteristics................................................................................. 23
5.5 Pad Assignment .............................................................................................. 24
5.6 Power Supply Ratings...................................................................................... 26
6 Mechanics, Mounting and Packaging.....................................................................27
6.1 Mechanical Dimensions of BGS2-E/BGS2-W.................................................. 27
7 Reference Approval..................................................................................................28
7.1 Reference Equipment for Type Approval......................................................... 28
7.2 Compliance with FCC and IC Rules and Regulations ..................................... 29

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Tab l es
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Tables
Table 1: Directives ....................................................................................................... 10
Table 2: Standards of North American type approval .................................................. 10
Table 3: Standards of European type approval............................................................ 10
Table 4: Requirements of quality ................................................................................. 11
Table 5: Standards of the Ministry of Information Industry of the
People’s Republic of China............................................................................ 11
Table 6: Toxic or hazardous substances or elements with defined concentration limits 12
Table 7: Overview of operating modes ........................................................................ 18
Table 8: Return loss in the active band........................................................................ 19
Table 9: Absolute maximum ratings............................................................................. 20
Table 10: Board temperature ......................................................................................... 21
Table 11: Ambient temperature according to IEC 60068-2 (w/o forced air circulation).. 21
Table 12: Ambient temperature with forced air circulation (air speed 0.9m/s)............... 21
Table 13: Storage conditions ......................................................................................... 22
Table 14: Summary of reliability test conditions............................................................. 23
Table 15: Pad assignments............................................................................................ 25
Table 16: Power supply ratings...................................................................................... 26

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Figures
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Figures
Figure 1: Numbering plan for connecting pads (bottom view)....................................... 24
Figure 2: BGS2-E/BGS2-W– top and bottom view........................................................ 27
Figure 3: Reference equipment for Type Approval ....................................................... 28

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1 Introduction
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1 Introduction
This document1describes the hardware of the Cinterion BGS2-E/BGS2-W module that con-
nects to the cellular device application and the air interface. It helps you quickly retrieve inter-
face specifications, electrical and mechanical details and information on the requirements to be
considered for integrating further components.
1.1 Related Documents
[1] BGS2-E/BGS2-W AT Command Set
[2] BGS2-E/BGS2-W Release Note
1.2 Terms and Abbreviations
1. The document is effective only if listed in the appropriate Release Notes as part of the technical
documentation delivered with your Cinterion product.
Abbreviation Description
ADC Analog-to-digital converter
AGC Automatic Gain Control
ANSI American National Standards Institute
ARFCN Absolute Radio Frequency Channel Number
ARP Antenna Reference Point
ASC0/ASC1 Asynchronous Controller. Abbreviations used for first and second serial interface of
BGS2-E/BGS2-W
B Thermistor Constant
BER Bit Error Rate
BTS Base Transceiver Station
CB or CBM Cell Broadcast Message
CE Conformité Européene (European Conformity)
CHAP Challenge Handshake Authentication Protocol
CPU Central Processing Unit
CS Coding Scheme
CSD Circuit Switched Data
CTS Clear to Send
DAC Digital-to-Analog Converter
DAI Digital Audio Interface
dBm0 Digital level, 3.14dBm0 corresponds to full scale, see ITU G.711, A-law
DCE Data Communication Equipment (typically modems, e.g. Cinterion GSM module)
DCS 1800 Digital Cellular System, also referred to as PCN

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1.2 Terms and Abbreviations
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DRX Discontinuous Reception
DSB Development Support Box
DSP Digital Signal Processor
DSR Data Set Ready
DTE Data Terminal Equipment (typically computer, terminal, printer or, for example, GSM
application)
DTR Data Terminal Ready
DTX Discontinuous Transmission
EFR Enhanced Full Rate
EGSM Enhanced GSM
EIRP Equivalent Isotropic Radiated Power
EMC Electromagnetic Compatibility
ERP Effective Radiated Power
ESD Electrostatic Discharge
ETS European Telecommunication Standard
FCC Federal Communications Commission (U.S.)
FDMA Frequency Division Multiple Access
FR Full Rate
GMSK Gaussian Minimum Shift Keying
GPIO General Purpose Input/Output
GPRS General Packet Radio Service
GSM Global Standard for Mobile Communications
HiZ High Impedance
HR Half Rate
I/O Input/Output
IC Integrated Circuit
IMEI International Mobile Equipment Identity
ISO International Standards Organization
ITU International Telecommunications Union
kbps kbits per second
LED Light Emitting Diode
Li-Ion/Li+ Lithium-Ion
Li battery Rechargeable Lithium Ion or Lithium Polymer battery
Mbps Mbits per second
MMI Man Machine Interface
MO Mobile Originated
MS Mobile Station (GSM module), also referred to as TE
MSISDN Mobile Station International ISDN number
Abbreviation Description

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1.2 Terms and Abbreviations
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MT Mobile Terminated
NTC Negative Temperature Coefficient
OEM Original Equipment Manufacturer
PA Power Amplifier
PAP Password Authentication Protocol
PBCCH Packet Switched Broadcast Control Channel
PCB Printed Circuit Board
PCL Power Control Level
PCM Pulse Code Modulation
PCN Personal Communications Network, also referred to as DCS 1800
PCS Personal Communication System, also referred to as GSM 1900
PDU Protocol Data Unit
PLL Phase Locked Loop
PPP Point-to-point protocol
PSK Phase Shift Keying
PSU Power Supply Unit
PWM Pulse Width Modulation
R&TTE Radio and Telecommunication Terminal Equipment
RAM Random Access Memory
RF Radio Frequency
RMS Root Mean Square (value)
RoHS Restriction of the use of certain hazardous substances in electrical and electronic
equipment.
ROM Read-only Memory
RTC Real Time Clock
RTS Request to Send
Rx Receive Direction
SAR Specific Absorption Rate
SAW Surface Accoustic Wave
SELV Safety Extra Low Voltage
SIM Subscriber Identification Module
SMD Surface Mount Device
SMS Short Message Service
SMT Surface Mount Technology
SRAM Static Random Access Memory
TA Terminal adapter (e.g. GSM module)
TDMA Time Division Multiple Access
TE Terminal Equipment, also referred to as DTE
Abbreviation Description

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1.2 Terms and Abbreviations
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Tx Transmit Direction
UART Universal asynchronous receiver-transmitter
URC Unsolicited Result Code
USSD Unstructured Supplementary Service Data
VSWR Voltage Standing Wave Ratio
Abbreviation Description

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1.3 Regulatory and Type Approval Information
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1.3 Regulatory and Type Approval Information
1.3.1 Directives and Standards
BGS2-E/BGS2-W is designed to comply with the directives and standards listed below.
It is the responsibility of the application manufacturer to ensure compliance of the final product
with all provisions of the applicable directives and standards as well as with the technical spec-
ifications provided in the "BGS2-E/BGS2-W Hardware Interface Description".1
1. Manufacturers of applications which can be used in the US shall ensure that their applications have a
PTCRB approval. For this purpose they can refer to the PTCRB approval of the respective module.
Table 1: Directives
1999/05/EC Directive of the European Parliament and of the council of 9 March 1999
on radio equipment and telecommunications terminal equipment and the
mutual recognition of their conformity (in short referred to as R&TTE Direc-
tive 1999/5/EC).
The product is labeled with the CE conformity mark
2002/95/EC Directive of the European Parliament and of the Council
of 27 January 2003 on the restriction of the use of certain
hazardous substances in electrical and electronic equip-
ment (RoHS)
Table 2: Standards of North American type approval1
1. Applies for the quad band module variant BGS2-W only.
CFR Title 47 Code of Federal Regulations, Part 22 and Part 24 (Telecommunications,
PCS); US Equipment Authorization FCC
UL 60 950-1 Product Safety Certification (Safety requirements)
NAPRD.03 V5.4 Overview of PCS Type certification review board Mobile Equipment Type
Certification and IMEI control
PCS Type Certification Review board (PTCRB)
RSS132 (Issue2)
RSS133 (Issue5)
Canadian Standard
Table 3: Standards of European type approval
3GPP TS 51.010-1 Digital cellular telecommunications system (Phase 2); Mobile Station (MS)
conformance specification
ETSI EN 301 511 V9.0.2 Candidate Harmonized European Standard (Telecommunications series)
Global System for Mobile communications (GSM); Harmonized standard
for mobile stations in the GSM 900 and DCS 1800 bands covering essen-
tial requirements under article 3.2 of the R&TTE directive (1999/5/EC)
(GSM 13.11 version 7.0.1 Release 1998)
GCF-CC V3.40 Global Certification Forum - Certification Criteria

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ETSI EN 301 489-1
V1.8.1
Candidate Harmonized European Standard (Telecommunications series)
Electro Magnetic Compatibility and Radio spectrum Matters (ERM); Elec-
tro Magnetic Compatibility (EMC) standard for radio equipment and ser-
vices; Part 1: Common Technical Requirements
ETSI EN 301 489-7
V1.3.1
Candidate Harmonized European Standard (Telecommunications series)
Electro Magnetic Compatibility and Radio spectrum Matters (ERM); Elec-
tro Magnetic Compatibility (EMC) standard for radio equipment and ser-
vices; Part 7: Specific conditions for mobile and portable radio and
ancillary equipment of digital cellular radio telecommunications systems
(GSM and DCS)
EN 60950-1:2006 Safety of information technology equipment
Table 4: Requirements of quality
IEC 60068 Environmental testing
DIN EN 60529 IP codes
Table 5: Standards of the Ministry of Information Industry of the People’s Republic of China
SJ/T 11363-2006 “Requirements for Concentration Limits for Certain Hazardous Sub-
stances in Electronic Information Products” (2006-06).
SJ/T 11364-2006 “Marking for Control of Pollution Caused by Electronic
Information Products” (2006-06).
According to the “Chinese Administration on the Control
of Pollution caused by Electronic Information Products”
(ACPEIP) the EPUP, i.e., Environmental Protection Use
Period, of this product is 20 years as per the symbol
shown here, unless otherwise marked. The EPUP is valid only as long as
the product is operated within the operating limits described in the Cin-
terion Wireless Modules Hardware Interface Description.
Please see Table 6 for an overview of toxic or hazardous substances or
elements that might be contained in product parts in concentrations
above the limits defined by SJ/T 11363-2006.
Table 3: Standards of European type approval

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Table 6: Toxic or hazardous substances or elements with defined concentration limits

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1.3.2 SAR requirements specific to portable mobiles
Mobile phones, PDAs or other portable transmitters and receivers incorporating a GSM module
must be in accordance with the guidelines for human exposure to radio frequency energy. This
requires the Specific Absorption Rate (SAR) of portable BGS2-E/BGS2-W based applications
to be evaluated and approved for compliance with national and/or international regulations.
Since the SAR value varies significantly with the individual product design manufacturers are
advised to submit their product for approval if designed for portable use. For European and US
markets the relevant directives are mentioned below. It is the responsibility of the manufacturer
of the final product to verify whether or not further standards, recommendations or directives
are in force outside these areas.
Products intended for sale on US markets1
ES 59005/ANSI C95.1 Considerations for evaluation of human exposure to Electromagnetic
Fields (EMFs) from Mobile Telecommunication Equipment (MTE) in the
frequency range 30MHz - 6GHz
Products intended for sale on European markets
EN 50360 Product standard to demonstrate the compliance of mobile phones with
the basic restrictions related to human exposure to electromagnetic
fields (300MHz - 3GHz)
1. Applies for the quad band module variant BGS2-W only.

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1.3.3 Safety Precautions
The following safety precautions must be observed during all phases of the operation, usage,
service or repair of any cellular terminal or mobile incorporating BGS2-E/BGS2-W. Manufac-
turers of the cellular terminal are advised to convey the following safety information to users
and operating personnel and to incorporate these guidelines into all manuals supplied with the
product. Failure to comply with these precautions violates safety standards of design, manu-
facture and intended use of the product. Cinterion Wireless Modules assumes no liability for
customer’s failure to comply with these precautions.
When in a hospital or other health care facility, observe the restrictions on the use of
mobiles. Switch the cellular terminal or mobile off, if instructed to do so by the guide-
lines posted in sensitive areas. Medical equipment may be sensitive to RF energy.
The operation of cardiac pacemakers, other implanted medical equipment and hear-
ing aids can be affected by interference from cellular terminals or mobiles placed close
to the device. If in doubt about potential danger, contact the physician or the manufac-
turer of the device to verify that the equipment is properly shielded. Pacemaker
patients are advised to keep their hand-held mobile away from the pacemaker, while
it is on.
Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it can-
not be switched on inadvertently. The operation of wireless appliances in an aircraft is
forbidden to prevent interference with communications systems. Failure to observe
these instructions may lead to the suspension or denial of cellular services to the
offender, legal action, or both.
Do not operate the cellular terminal or mobile in the presence of flammable gases or
fumes. Switch off the cellular terminal when you are near petrol stations, fuel depots,
chemical plants or where blasting operations are in progress. Operation of any elec-
trical equipment in potentially explosive atmospheres can constitute a safety hazard.
Your cellular terminal or mobile receives and transmits radio frequency energy while
switched on. Remember that interference can occur if it is used close to TV sets,
radios, computers or inadequately shielded equipment. Follow any special regulations
and always switch off the cellular terminal or mobile wherever forbidden, or when you
suspect that it may cause interference or danger.
Road safety comes first! Do not use a hand-held cellular terminal or mobile when driv-
ing a vehicle, unless it is securely mounted in a holder for speakerphone operation.
Before making a call with a hand-held terminal or mobile, park the vehicle.
Speakerphones must be installed by qualified personnel. Faulty installation or opera-
tion can constitute a safety hazard.
IMPORTANT!
Cellular terminals or mobiles operate using radio signals and cellular networks.
Because of this, connection cannot be guaranteed at all times under all conditions.
Therefore, you should never rely solely upon any wireless device for essential com-
munications, for example emergency calls.
Remember, in order to make or receive calls, the cellular terminal or mobile must be
switched on and in a service area with adequate cellular signal strength.
Some networks do not allow for emergency calls if certain network services or phone
features are in use (e.g. lock functions, fixed dialing etc.). You may need to deactivate
those features before you can make an emergency call.
Some networks require that a valid SIM card be properly inserted in the cellular termi-
nal or mobile.

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2 Product Concept
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2 Product Concept
2.1 Key Features at a Glance
Feature Implementation
General
Frequency bands Dual band (BGS2-E): GSM 900/1800MHz
Quad band (BGS2-W): GSM 850/900/1800/1900MHz
GSM class Small MS
Output power (according
to Release 99, V5)
Class 4 (+33dBm ±2dB) for EGSM850 (quad band only)
Class 4 (+33dBm ±2dB) for EGSM900
Class 1 (+30dBm ±2dB) for GSM1800
Class 1 (+30dBm ±2dB) for GSM1900 (quad band only)
Power supply 3.3V to 4.5V
Operating temperature
(board temperature)
Normal operation: -30°C to +85°C
Restricted operation: -40°C to -30°C, +85°C to +90°C
Physical Dimensions: 27.6mm x 18.8mm x 2.7mm
Weight: approx. 3 g
RoHS All hardware components fully compliant with EU RoHS Directive
GSM/GPRS features
Data transfer GPRS:
• Multislot Class 8 (dual band) or 10 (quad band)
• Full PBCCH support
• Mobile Station Class B
• Coding Scheme 1 – 4
CSD:
• V.110, RLP, non-transparent
• 2.4, 4.8, 9.6, 14.4kbps
•USSD
PPP-stack for GPRS data transfer
SMS Point-to-point MT and MO
Cell broadcast
Text and PDU mode
Storage: SIM card plus 25 SMS locations in mobile equipment
Transmission of SMS alternatively over CSD or GPRS. Preferred mode can
be user defined.
Fax Group 3; Class 1
Audio Speech codecs:
• Half rate HR (ETS 06.20)
• Full rate FR (ETS 06.10)
• Enhanced full rate EFR (ETS 06.50/06.60/06.80)
• Adaptive Multi Rate AMR
Handsfree operation, echo cancellation, noise suppression,
7 different ringing tones/melodies

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Software
AT commands Hayes 3GPP TS 27.007, TS 27.005, Cinterion
AT commands for RIL compatibility
Microsoft™ compatibility RIL for Pocket PC and Smartphone
SIM Application Toolkit SAT Release 99
TCP/IP stack Protocols: TCP server/client, UDP, HTTP, FTP, SMTP, POP3
Access by AT commands
Firmware update Generic update from host application over ASC0 or ASC1.
Interfaces
Module interface Surface mount device with solderable connection pads (SMT application
interface).
Land grid array (LGA) technology ensures high solder joint reliability and
provides the possibility to use an optional module mounting socket.
2 serial interfaces ASC0:
• 8-wire modem interface with status and control lines, unbalanced, asyn-
chronous
• Adjustable baud rates: 1,200bps to 230,400bps
• Autobauding: 1,200bps to 230,400bps
• Supports RTS0/CTS0 hardware handshake and software XON/XOFF
flow control.
• Multiplex ability according to GSM 07.10 Multiplexer Protocol.
ASC1:
• 4-wire, unbalanced asynchronous interface
• Adjustable baud rates: 1,200bps to 230,400bps
• Supports RTS1/CTS1 hardware handshake and software XON/XOFF
flow control
Audio 1 analog interface (with microphone feeding)
UICC interface Supported SIM/USIM cards: 3V, 1.8V
External SIM card reader has to be connected via interface connector (note
that card reader is not part of BGS2-E/BGS2-W)
GPIO interface GPIO interface with 10 GPIO lines. The GPIO interface is shared with an
I2C interface, LED signalling and PWM functionality.
Antenna 50
Power on/off, Reset
Power on/off Switch-on by hardware signal ON
Switch-off by AT command (AT^SMSO)
Automatic switch-off in case of critical temperature and voltage conditions.
Reset Orderly shutdown and reset by AT command
Special features
Real time clock Timer functions via AT commands
Phonebook SIM and phone
TTY/CTM support Integrated CTM modem
Feature Implementation

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3 Application Interface
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3 Application Interface
BGS2-E/BGS2-W is equipped with an SMT application interface that connects to the external
application. The host interface incorporates several sub-interfaces: power supply, SIM inter-
face, serial interface ASC0, serial interface ASC1, analog audio interface, GPIO interface, I2C
interface and PWM interface (for details see Chapter 2 and Section 5.5).

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3.1 Operating Modes
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3.1 Operating Modes
The table below briefly summarizes the various operating modes referred to in the following
chapters.
Table 7: Overview of operating modes
Normal operation GSM/GPRS SLEEP Various power save modes set with AT+CFUN command.
Software is active to minimum extent. If the module was
registered to the GSM network in IDLE mode, it is registered
and paging with the BTS in SLEEP mode, too. Power sav-
ing can be chosen at different levels: The NON-CYCLIC
SLEEP mode (AT+CFUN=0) disables the AT interface. The
CYCLIC SLEEP modes AT+CFUN=7 and 9 alternatingly
activate and deactivate the AT interfaces to allow perma-
nent access to all AT commands.
GSM IDLE Software is active. Once registered to the GSM network,
paging with BTS is carried out. The module is ready to send
and receive.
GSM TALK Connection between two subscribers is in progress. Power
consumption depends on network coverage individual set-
tings, such as DTX off/on, FR/EFR/HR, hopping
sequences, antenna.
GPRS IDLE Module is ready for GPRS data transfer, but no data is cur-
rently sent or received. Power consumption depends on
network settings and GPRS configuration (e.g. multislot set-
tings).
GPRS DATA GPRS data transfer in progress. Power consumption
depends on network settings (e.g. power control level),
uplink/downlink data rates, GPRS configuration (e.g. used
multislot settings) and reduction of maximum output power.
Power Down Normal shutdown after sending the AT^SMSO command.
Only a voltage regulator is active for powering the RTC. Software is not active.
Interfaces are not accessible.
Operating voltage (connected to BATT+) remains applied.
Alarm mode Restricted operation launched by RTC alert function while the module is in Power
Down mode. Module will not be registered to GSM network. Limited number of AT
commands is accessible.

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4 Antenna Interface
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4 Antenna Interface
The RF interface has an impedance of 50Ω. BGS2-E/BGS2-W is capable of sustaining a total
mismatch at the antenna lines without any damage, even when transmitting at maximum RF
power.
The external antenna must be matched properly to achieve best performance regarding radi-
ated power, modulation accuracy and harmonic suppression. Antenna matching networks are
not included on the BGS2-E/BGS2-W module and should be placed in the host application if
the antenna does not have an impendance of 50Ω.
Regarding the return loss BGS2-E/BGS2-W provides the following values in the active band:
Table 8: Return loss in the active band
State of module Return loss of module Recommended return loss of application
Receive > 8dB > 12dB
Transmit not applicable > 12dB

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5 Electrical, Reliability and Radio Characteristics
5.1 Absolute Maximum Ratings
The absolute maximum ratings stated in Table 9 are stress ratings under any conditions.
Stresses beyond any of these limits will cause permanent damage to BGS2-E/BGS2-W.
Table 9: Absolute maximum ratings
Parameter Min Max Unit
Supply voltage BATT+ -0.3 +6.0 V
Voltage at all digital lines in Power Down mode -0.3 +0.3 V
Voltage at digital lines 1.8V domain in normal operation -0.3 +2.2 V
Voltage at digital lines VDIG domain (1.8V) in normal opera-
tion
-0.3 +2.2 V
Voltage at digital lines VDIG domain (2.85V) in normal opera-
tion
-0.3 +3.3 V
Voltage at SIM interface, CCVCC 1.8V in normal Operation -0.3 +2.2 V
Voltage at SIM interface, CCVCC 2.85V in normal Operation -0.3 +3.3 V
Voltage at analog lines in normal operation -0.3 +3.0 V
Voltage at analog lines in Power Down mode -0.3 +0.3 V
VDDLP -0.3 +2.5 V