LTC1426IS8 查看數據表（PDF） - Linear Technology

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LTC1426IS8

Micropower Dual 6-Bit PWM DAC

Linear Technology 

LTC1426

ELECTRICAL CHARACTERISTICS TA = 25°C, (Note 2) unless otherwise specified.

SYMBOL PARAMETER

VIL

CLK Low Level

Input Voltage (Note 5)

CONDITIONS

VCC = 4.5V

VCC = 2.7V

IOZ

ZIN

fCLK

tCKHI

tCKLO

tPW

tDEB

tDELAY

fREPEAT

Three-State Output Leakage

CLK Input Resistance

Clock Frequency

Clock High Time

Clock Low Time

Pulse Width

Debounce Time

Repeat Rate Delay

Repeat Frequency

SHDN = 0

Pushbutton Mode, CLK1/CLK2

Pulse Mode, VCC = 3.3V

Pulse Mode, VCC = 2.7V

Pulse Mode, VCC = 3.3V

Pulse Mode, VCC = 2.7V

Pulse Mode, VCC = 3.3V

Pulse Mode, VCC = 2.7V

Pushbutton Mode

Pushbutton Mode

Pushbutton Mode

Pushbutton Mode

SHDN

CLK1, CLK2

SHDN

CLK1, CLK2

MIN TYP MAX UNITS

q

0.8

V

q

0.8

V

q

0.45

V

q

0.45

V

q

±5

µA

2.5

MΩ

q

1

MHz

q

750

kHz

q 450

ns

q 600

ns

q 450

ns

q 600

ns

q 670

µs

q 10.7 12.8 21.3

ms

q 340 410 680

ms

q 11.7 19.5 23.4

Hz

The q denotes the specifications which apply over the full operating

temperature range.

Note 1: Absolute Maximum Ratings are those values beyond which the life

of the device may be impaired.

Note 2: All currents into device pins are positive; all currents out of device

pins are negative. All voltages are referenced to ground, unless otherwise

specified. All typicals are given for VCC = VREF = 5V, TA = 25°C and

PWM1/PWM2 output to GND, CPWM = 10pF.

Note 3: Shutdown current can be negative due to leakage currents if VCC >

VREF or VREF > VCC.

Note 4: Guaranteed by Design. Decouple the VCC and VREF pins to GND

using high quality, low ESR, low ESL 0.1µF capacitors to eliminate PWM

switching noise that may otherwise get coupled into the CLK1/CLK2 high

impedance input buffers. The decoupling capacitors should be located in

close proximity to these pins and the ground line to have maximum effect.

Note 5: Input thresholds apply for both pushbutton and pulse modes.

TYPICAL PERFORMANCE CHARACTERISTICS

Differential Nonlinearity (DNL)

0.05

VCC = VREF = 5V

0.04 TA = 25°C

0.03

0.02

0.01

0

– 0.01

– 0.02

– 0.03

– 0.04

– 0.05

0 8 16 24 32 40 48 56 64

CODE

1426 G01

Integral Nonlinearity (INL)

0.05

VCC = VREF = 5V

0.04 TA = 25°C

0.03

0.02

0.01

0

– 0.01

– 0.02

– 0.03

– 0.04

– 0.05

0 8 16 24 32 40 48 56 64

CODE

1426 G02

Output Pull-Down Voltage

vs Output Current Sink Capability

1000

VCC = 5V

100

85°C

25°C

– 40°C

10

1

0.1

0.1

1

10

100

OUTPUT CURRENT SINK CAPABILITY (mA)

1426 G03

3

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