Rainbow-electronics MAX5547 Bedienungsanleitung PDF herunterladen (Seite 4)

MAX5547

Dual, 10-Bit, Current-Sink Output DAC

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= +2.7 to +5.25V, GND = 0, external reference = +2.5V, output voltage = +2.0V, T

= -40°C to +85°C. Typical values are at

= +3.0V, and T

= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SPI TIMING CHARACTERISTICS (see Figure 1)

SCLK Clock Period t

100

SCLK Pulse-Width High t

40 ns

SCLK Pulse-Width Low t

40 ns

CS Fall to SCLK Fall Setup Time t

CSS

25 ns

SCLK Fall to CS Rise Hold Time t

CSH

50 ns

DIN to SCLK Fall Setup Time t

40 ns

DIN to SCLK Fall Hold Time t

0ns

CS Pulse-Width High t

CSW

100

Note 1: Devices are 100% production tested at T

= +25°C. Limits over temperature are guaranteed by design.

Note 2: INL linearity is from code 48 to code 1023.

Note 3: Guaranteed by design. Not production tested.

Note 4: The DACs continue to operate at currents lower than 50µA on the 1.2mA range and 150µA on the 3.6mA range. However,

performance is not guaranteed at these low currents. A code of all zeros has a nominal output current of 0µA.

Note 5: Compliance voltage range is defined as the range where the output current is -2 LSB of its value at V

OUT

= +1V.

Note 6: Settling time is measured from 0.25 x full scale to 0.75 x full scale.

Note 7: The device draws higher supply current when the digital inputs are driven with voltages between (V

- 0.5V) and (GND +

0.5V). See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics.

Typical Operating Characteristics

= +3.0V, GND = 0, external reference = +2.5V, T

= +25°C, unless otherwise noted.)

-4

-3

-2

-1

0 256 512 768 1024

INTEGRAL NONLINEARITY

vs. DIGITAL INPUT CODE (1.2mA SETTING)

MAX5547 toc01

DIGITAL INPUT CODE

INL (LSB)

-4

-3

-2

-1

0 256 512 768 1024

INTEGRAL NONLINEARITY

vs. DIGITAL INPUT CODE (3.6mA SETTING)

MAX5547 toc02

DIGITAL INPUT CODE

INL (LSB)

-1.00

-0.75

-0.50

-0.25

0.25

0.50

0.75

1.00

0 256 512 768 1024

DIFFERENTIAL NONLINEARITY

vs. DIGITAL INPUT CODE (1.2mA SETTING)

MAX5547 toc03

DIGITAL INPUT CODE

DNL (LSB)

1 2 3 4 5 6 7 8 9 10 11 12

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