User's Manual

Telit TRIZIUM Product Description
80264ST10007a Rev. 4– 09/09/04
Reproduction forbidden without DAI Telecom written authorization – All Right reserved – Right of modification reserved page 14 of 202
2.7.1 Antenna connector
N/A
2.8 Supply voltage
The external power supply must be connected to VBATT signal (see paragraph 2.16,) and must fulfil the following
requirements:
• Nominal operating voltage 3.8 V
• Operating voltage range 3.4 V - 4.2 V
Note: Operating voltage range must never be exceeded, care must be taken in order to fulfill min/max voltage
requirements.
2.9 Power consumption
The typical current consumption of the Telit TRIZIUM module are:
• Power off current (typical) < 30 µA;
• Stand–by current < 19 mA
rms
(< 4 mA
rms
using command AT+CFUN )
• Operating current in voice ch. 170 mA
rms
@ typical network conditions
• Operating current in voice ch. < 270 mA
rms
1.9 A
peak
@ worst network conditions
• Operating current in GPRS class 10 < 500 mA
rms
@ typical network conditions
2.10 Embodied Battery charger
The battery charger is suited for 3.7V Li-Ion rechargeable battery (suggested capacity 500-1000mAH). The Charger
needs only a CURRENT LIMITED power source input and charges the battery directly through VBATT connector
pins.
• Battery charger input pin CHARGE
• Battery pins VBATT, GND
• Battery charger input voltage min 5.0 V
• Battery charger input voltage typ 5.5 V
• Battery charger input voltage max 7.0 V
• Battery charger input current max 400mA
• Battery type Li-Ion rechargeable
NOTE: If embodied battery charger is used, then a LOW ESR capacitor of at least 100µF must be mounted in parallel
to VBATT TRIZIUM pins.
NOTE: when power is supplied to the CHARGE pin, a battery must always be connected to the VBATT pins of the
TRIZIUM.
2.11 User Interface
The user interface is managed by AT commands specified on the GSM 07.07 and 07.05 specification and listed in the
chapter 5, AT Command.
2.11.1 Speech Coding
The Telit TRIZIUM modules vocoder supports the following rates:
• Half Rate.
• Full rate,
• Enhanced Full Rate