AS8501 - Data Sheet

austriamicrosystems

Revision 1.1, 04-April-06

www.austriamicrosystems.com

Page 8 of 40

Electrical characteristics (continued)

VDDA=5V +/-0.1 V, fclk=8.192 MHz, chopping ratio MM=4 (see 7.5.3), oversampling frequency=2.048 MHz, oversampling ratio=128

temperature range : -40 to 125°C if not otherwise noted

symbol

parameter

conditions

min

typ

max

units

programmable current source

output to Vbat, ETS, or ETR

Icurr_ON

current level

0

248

µA

I_steps

current steps

6

8

10

µA

Dcurr

accuracy, room temperature

248 µA

0.2

0.5

%

TC_CS

temperature coefficient

830

900

1000

ppm/K

1 )

Icurr_OFF

current when off

room temperature

0.001

0.01

µA

Icurr_Ri

internal resistance of current source Ua < 2 V

10

MOhm

digital CMOS inputs with pull up and schmidt-trigger

input PINs CLK and SCLK

Vih

high level input voltage

VDDD=5V

3.5

V

Vil

low level input voltage

VDDD=5V

1.5

V

Iih

current level

VDDD=5V, Vih=5V

-1

1

µA

Iil

current level

VDDD=5V, Vil=0

30

120

µA

digital CMOS outputs

output PINs SDAT and INTN

Voh

high level output voltage

VDDD=5V, -633uA

4.5

V

Vol

low level output voltage

VDDD=5V, 564uA

0.4

V

Cl

capacitive load

20

pF

Tristate digital I/O

Voh

high level output voltage

VDDD=5V, -633uA

4.5

V

Vol

low level output voltage

VDDD=5V, 564uA

0.4

V

Ioz

tristate leakage current to

VDDD,VSSD

VDDD=5V

-1

1

µA

Vih

high level input voltage

VDDD=5V

3.5

V

Vil

low level input voltage

VDDD=5V

1.5

V

EZPRG input

Vprg

programming voltage - for factory

programming only

VDDD=5V

-

-

-

V

2)

supply current

Isup

normal operation

VDDD=VDDA=5V

3

5

mA

Iaw

active wake-up

VDDD=VDDA=5V

40

100

µA

3)

supply voltage

VDDA

positive analog supply voltage

4.7

5.0

5.3

V

4)

VDDD

positive digital supply voltage

4.5

5.0

5.5

V

VSS, VSSD

negative supply voltage

0

V

Power On Reset

Vporhi

Power on reset Hi

2.5

4.1

V

5)

Vhyst

Hysteresis

0.1

0.3

V

5)

Notes:

1)

not tested, derived from device characterization

2)

for factory calibration only. During normal operation this PIN must be connected to VDDD.

3)

the average current is dependent on the on-time of the measurement system i.e. it can be programed via the CRA register

4)

stability of analog supply should be within +/- 0.1 V

5)

tested at room temperature only