AS3931 datasheet(8/31 Pages) AMSCO

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AS3931

Datasheet - Electrical Character i s t ics

WAKEUP

Vin,min

minimum differential input

voltage for wake up

detection

NPRE = 8

trise,tfall < 150 µs;

VREG = 2.4 V to 3.5 V

350

µVpp

Vin,max

maximum differential input

voltage for wake up

detection

1Vpp

IWAKE

WAKE pin current

Voltage at WAKE pin:

VOL < 0.4 V;

VREG = 2.4 V to 3.5 V

0.33

RSSI

VRSSI

RSSI output voltage range

0.5

1.7

VRSSI0

RSSI output voltage

(RSSI offset)

VIN = 0;

0.5

0.76

1.2

VSTEP

RSSI output voltage step

VIN = 1 mVpp;

100

290

VLOG

logarithmic input voltage

range

VIN = 1 mVpp, RSSI step = high

0.3

300

SRSSI

RSSI slope in log. range

RSSI step = high

mV/dB

CRSSI

cap. loading of RSSI pin

RSSI buffer active

IRSSI

RSSI buffer output current

µA

Tstep

RSSI voltage step time

CL = 10 pF,

RL = 1 MΩ;

Input signal amplitude

100 mVpp; CS from low to high

(Buffer activation in presence of

a strong input signal);

350

µs

channel switching from ChA(100

mVpp) to

ChB (0 mVpp)

with CS deactivation of

10 µs

350

µs

VRIP

RSSI Ripple Voltage

RSSI buffer active, CL = 10 pF, RL = 1 MΩ;

VIN = 1 mVpp;

Serial Programming Interface

VIL

Digital input L level

Pins SCL, SDA, CS;

VREG = 2.4 V to 3.5 V

0.3 *

VREG

VIH

Digital input H level

Pins SCL, SDA, CS

VREG = 2.4 V to 3.5 V

0.7 *

VREG

IIH

Digital Input current

Pins SCL, SDA, CS

VIH = 2.4 V;

VREG = 2.4 V to 3.5 V

100

µA

TCLK

Clock period

VREG = 2.4 V to 3.5 V

2µs

TCH

Clock high duration

VREG = 2.4 V to 3.5 V

500

TCL

Clock low duration

VREG = 2.4 V to 3.5 V

500

Table 3. Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

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