Rainbow-electronics MAX6691 Manual do Utilizador descarregar pdf (Página 2)

MAX6691

Four-Channel Thermistor Temperature-to-Pulse-

Width Converter

2 _______________________________________________________________________________________

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.

Note 1: Specification limits over temperature are guaranteed by design, not production tested.

to GND...........................................................-0.3V to +6.0V

All Other Pins to GND.................................-0.3V to (V

+ 0.3V)

I/O, R+, R-, T1–T4 Current................................................±20mA

ESD Protection (Human Body Model) .............................±2000V

Continuous Power Dissipation (T

= +70°C)

10-Pin µMAX (derate 5.6mW/°C above +70°C) ........444.4mW

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

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

ELECTRICAL CHARACTERISTICS

= 3.0V to 5.5V, T

= -55°C to +125°C, unless otherwise noted. Typical values are specified at V

= 3.3V and T

= +25°C.) (Note1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

= +25°C, V

= 3.3V 0.5

HIGH

LOW

Accuracy V

REXT

= T

MIN

to T

MAX

1.0

% FS

Supply Voltage Range V

3.0 5.5 V

Supply Current I

During conversion, no load 300 600 µA

Sleep-Mode Supply Current I

STANDBY

3.5 10 µA

Input Leakage Current I

LEAKAGE

1.0 µA

Reference Voltage Output V

REF

= 1mA, T

= +25°C 1.19 1.24 1.32 V

Reference Load Regulation 0 < I

REF

< 2mA 0.1 0.2 %

Reference Supply Rejection 0.2 %

Logic Input Low Voltage V

0.3

Logic Input High Voltage V

0.7

TIMING CHARACTERISTICS

= 3.0V to 5.5V, T

= -55°C to +125°C, unless otherwise noted. Typical values are specified at V

= 3.3V and T

= +25°C.)

(Figure 1) (Note1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Glitch Immunity on I/O Input 500 ns

Conversion Time t

CONV

86 102 156 ms

Nominal Pulse Width t

LOW

4.0 4.9 7.5 ms

Start Pulse Width t

START

5µs

Data Ready Pulse Width t

READY

103 122 188 µs

Error Pulse Width t

ERROR

103 122 188 µs

Rise Time t

RISE

= 15pF, R

= 10kΩ 600 ns

Fall Time t

FALL

= 15pF, R

= 10kΩ 600 ns

1 2 3 4 5 6 7

Width Converter 1

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