Rainbow-electronics DS1857 Manual do Utilizador descarregar pdf (Página 2)

DS1857

Dual Temperature-Controlled Resistors with

External Temperature Input and Monitors

2 _____________________________________________________________________

PARAMETER

SYMBOL

CONDITIONS MIN

TYP

MAX

UNITS

Supply Voltage V

(Note 1) +3.0 5.5 V

Input Logic 1 (SDA, SCL, A2, A1, A0,

WPEN, RHIZ)

(Note 2)

0.7 x Vcc V

+ 0.3

Input Logic 0 (SDA, SCL, A2, A1, A0,

WPEN, RHIZ)

(Note 2) -0.3

0.3 x V

Resistor Inputs (L0, L1, H0, H1) -0.3

+ 0.3

Resistor Current I

RES

-3 +3 mA

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Voltage on V

Relative to Ground.......................-0.5V to +6.0V

Voltage on Inputs Relative

to Ground* ................................................-0.5V to V

+ 0.5V

Voltage on Resistor Inputs Relative

to Ground* ................................................-0.5V to V

+ 0.5V

Current into Resistors............................................................5mA

Operating Temperature Range ...........................-40°C to +95°C

Programming Temperature Range .........................0°C to +70°C

Storage Temperature Range .............................-55°C to +125°C

Soldering Temperature .......................................See IPC/JEDEC

J-STD-020A Specification

RECOMMENDED DC OPERATING CONDITIONS

= -40°C to +95°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

Supply Current I

(Note 3) 1 2 mA

Input Leakage I

-1 +1 µA

Input Current each I/O Pin 0.4 x V

< V

I/O

< 0.9 x V

-10 +10

µA

OL1

3mA sink current 0 0.4

Low-Level Output Voltage (SDA)

OL2

6mA sink current 0 0.6

Full-Scale Input (MON1, MON2) (Note 4)

2.4875 2.5000 2.5125

Full-Scale V

Monitor (Note 5)

6.5208 6.5536 6.5864

I/O Capacitance C

I/O

10 pF

WPEN Pullup Resistor R

WPEN

40 65 100 kΩ

RHIZ Pullup Resistor R

RHIZ

40 65 100 kΩ

Digital Power-On Reset POD

1.0

2.2 V

Analog Power-On Reset POA

2.0

2.6 V

DC ELECTRICAL CHARACTERISTICS

= 3.0V to 5.5V, T

= -40°C to +95°C, unless otherwise noted.)

*Not to exceed 6.0V.

1 2 3 4 5 6 7 ... 21 22

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