Q2686 Wavecom, Q2686 Datasheet - Page 23

• Manufacturer Part Number: Q2686
• Description: Wireless CPU
• Manufacturer: Wavecom

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(1): This value must be guarantied during the burst (with 1.5A Peak in GSM or GPRS mode)
(2): Max operating Voltage Stationary Wave Ratio (VSWR) 2:1
When the Wireless CPU
(battery + protections + PCB) should be < 150 mΩ.
As the radio power amplifier is directly connected to VBATT, the Wireless CPU
is sensitive to any Alternative Current on lines. When a DC/DC converter is
used, Wavecom recommends setting the converter frequency in such a way
that the resulting voltage does not exceed the values in following table.
When the Wireless CPU
pin of the 100-pin connector, except on BAT-RTC (pin 7) for RTC operation or
ON/~OFF (pin 19) to power-ON the Wireless CPU
3.2.2 Power Consumption
Power consumption is dependent on the configuration used. It is for this
reason that the following consumption values are given for each mode, RF
band and type of software used (AT or Open AT™).
All the following information is given assuming a 50 Ω RF output.
The following consumption values were obtained by performing measurements
on the Wireless CPU
Three VBATT values are used to measure the consumption, VBATT
VBATT
The average current is given for the three VBATT values and the peak current
given is the maximum current peak measured with the three VBATT voltages.
For a more detailed description of the operating modes, see the appendix of the
AT Command Interface Guide OS 6.60 [7].
For more information on the consumption measurement procedure, see Q2686
Wireless CPU
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.
WM_PRJ_Q2686_PTS_001-007
MAX
(4.8V) and VBATT
Table 2 Maximum voltage ripple (Uripp) vs Frequency
®
Customer Design Guidelines [10].
confidential ©
VBATT
®
samples at a temperature of 25° C.
®
10 ≤ f ≤ 200
1,2
Table 1 Power supply voltage
is in Alarm mode, no voltage must be applied on any
®
Input power supply voltage
> 200
(kHz)
Freq.
<10
is supplied with a battery, the total impedance
TYP
(3.6V).
V
3.2
MIN
V
3.6
NOM
U
(mVpp)
®
ripp
.
300
40
10
Max
Q2686 Wireless CPU
V
4.8
MAX
MIN
Interfaces
(3.2V),
March 6, 2007
Page: 22 / 87
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