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S2-LP Datasheet(PDF) 26 Page - STMicroelectronics

Part # S2-LP
Description  Excellent receiver selectivity and blocking
PDF  90 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

S2-LP Datasheet(HTML) 26 Page - STMicroelectronics

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Specifications
S2-LP
26/90
DocID029944 Rev 1
4.11
Battery indicator
Characteristics measured over recommended operating conditions unless otherwise
specified. All typical values are referred to 25 °C temperature, VBAT = 3.0 V.
Table 31: Battery indicator and low battery detector
Parameter
Test conditions
Min.
Typ.
Max.
Unit
Battery level
thresholds #1
2.1
V
Battery level
thresholds #2
2.3
Battery level
thresholds #3
2.5
Battery level
thresholds #4
2.7
Brownout threshold
Measured in slow battery variation (static)
conditions (inaccurate mode)
1.5
Measured in slow battery variation (static)
conditions (accurate mode)
1.7
Brownout threshold
hysteresis
70
mV
For battery-powered equipment, the TX does not transmit at a wrong frequency
under low battery voltage conditions. It remains on either channel or stops
transmitting. The latter can of course be realized by using a lock detect and/or by
switching off the PA under control of the battery monitor. For testing reasons this
control is enabled/disabled by SPI.



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