S2-LPS datasheet(17/73 Pages) STMICROELECTRONICS

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Parameter

Test conditions

Min.

Typ.

Max.

Unit

VDD+

0.1

Low level output voltage

IOL = +2.0 mA (+4.0 mA into high output

current mode).

0.5

CSn low to positive edge on SCLK in low

power mode state

µs

CSn low to positive edge on SCLK in

ready state

3.11

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 27. Battery indicator and low battery detector

Parameter

Test conditions

Min. Typ. Max. Unit

Battery level thresholds #1

2.1

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

Note:

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.

S2-LPS

Battery indicator

DS13831 - Rev 1

page 17/73

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