PCF8591 datasheet(17/28 Pages) PHILIPS

17 / 28 page

1998 Jul 02

Philips Semiconductors

Product speciﬁcation

8-bit A/D and D/A converter

PCF8591

11 DC CHARACTERISTICS

VDD = 2.5 V to 6 V; VSS =0V; Tamb = −40 °Cto +85 °C unless otherwise speciﬁed.

Notes

1. The power on reset circuit resets the I2C-bus logic when VDD is less than VPOR.

2. A further extension of the range is possible, if the following conditions are fulfilled:

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply

VDD

supply voltage (operating)

2.5

−

6.0

IDD

supply current

standby

VI =VSS or VDD; no load

−

115

µA

operating, AOUT off

fSCL = 100 kHz

−

125

250

µA

operating, AOUT active

fSCL = 100 kHz

−

0.45

1.0

VPOR

Power-on reset level

note 1

0.8

−

2.0

Digital inputs/output: SCL, SDA, A0, A1, A2

VIL

LOW level input voltage

−

0.3

× VDD V

VIH

HIGH level input voltage

0.7

× VDD −

VDD

leakage current

A0, A1, A2

VI =VSS to VDD

−250

−

+250

SCL, SDA

VI =VSS to VDD

−1

−

µA

input capacitance

−−

5pF

IOL

LOW level SDA output current VOL = 0.4 V

3.0

−−

Reference voltage inputs

VREF

reference voltage

VREF >VAGND; note 2

VSS + 1.6 −

VDD

VAGND

analog ground voltage

VREF >VAGND; note 2

VSS

−

VDD − 0.8 V

ILI

input leakage current

−250

−

+250

RREF

input resistance

pins VREF and AGND

−

100

−

Ω

Oscillator: OSC, EXT

ILI

input leakage current

−−

250

fOSC

oscillator frequency

0.75

−

1.25

MHz

REF

AGND

--------------------------------------

0.8V

≥

REF

AGND

--------------------------------------

–

0.4V

≥

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